This paper presents a new soft-switched resonant
dc-dc converter using a passive snubber circuit. The
proposed converter uses a new zero voltage and zero current
switching (ZVZCS) strategies to get ZVZCS function.
Besides operating at constant frequency, all semiconductor
devices operate at soft-switching without additional voltage
and current stresses. In order to validate the proposed
converter, computer simulations and experimental results
were conducted. The paper indicates the effective converter
operation region of the soft-switching action and its
efficiency improvement results on the basis of experimental
evaluations using laboratory prototype.
A New Soft-Switched Resonant DC-DC ConverterIDES Editor
This paper presents a new soft-switched resonant dcdc
converter using a passive snubber circuit. The proposed
converter uses a new zero voltage and zero current switching
(ZVZCS) strategies to get ZVZCS function. Besides operating
at constant frequency, all semiconductor devices operate at
soft-switching without additional voltage and current stresses.
In order to validate the proposed converter, computer
simulations and experimental results were conducted. The
paper indicates the effective converter operation region of the
soft-switching action and its efficiency improvement results
on the basis of experimental evaluations using laboratory
prototype.
IJERD (www.ijerd.com) International Journal of Engineering Research and Devel...IJERD Editor
This document summarizes a research paper that proposes a soft-switching boost converter with an auxiliary resonant circuit (SARC) for improving the efficiency of photovoltaic (PV) energy conversion systems. The converter aims to boost the lower output voltage of solar cells to a useful voltage for loads. Simulation and experimental results confirm the converter's operational principles and soft-switching performance. Analysis shows that through SARC, all switching devices achieve zero-voltage and zero-current switching, reducing switching losses compared to conventional hard-switching converters. The converter design targets a 700W PV module, and testing with a PV simulator validates effective maximum power point tracking control.
The Analysis of Dead Time on Switching Loss in High and Low Side MOSFETs of Z...IDES Editor
This work is about the analysis of dead time variation
on switching losses in a Zero Voltage Switching (ZVS)
synchronous buck converter (SBC) circuit. In high frequency
converter circuits, switching losses are commonly linked with
high and low side switches of SBC circuit. They are activated
externally by the gate driver circuit. The duty ratio, dead time
and resonant inductor are the parameters that affect the
efficiency of the circuit. These variables can be adjusted for
the optimization purposes. The study primarily focuses on
varying the settings of input pulses of the MOSFETs in the
resonant gate driver circuit which consequently affects the
performance of the ZVS synchronous buck converter circuit.
Using the predetermined inductor of 9 nH, the frequency is
maintained at 1 MHz for each cycle transition. The switching
loss graph is obtained and switching losses for both S1 and S2
are calculated and compared to the findings from previous
work. It has shown a decrease in losses by 13.8 % in S1. A dead
time of 15 ns has been determined to be optimized value in
the SBC design.
This document describes novel multi-threshold voltage level converters that minimize power consumption without compromising speed. Conventional feedback-based level converters rely on feedback circuits that cause slow response times and short circuit currents. The novel converters proposed use multiple transistor threshold voltages to directly drive high voltage gates from low voltage signals without static currents. When used in an integrated circuit, the multi-threshold converters decrease power by 47% and optimize delay by 50% compared to feedback converters in a 0.18-μm technology.
High Voltage Gain Boost Converter for Micro source Power Conversion systemIDES Editor
The document presents a new high voltage gain boost converter design that uses a coupled inductor and voltage lift technique. Key features of the proposed converter include:
1) It can achieve a high voltage gain while operating at a duty ratio close to 0.65, allowing continuous conduction mode operation.
2) The coupled inductor design recycles energy stored in the leakage inductance, increasing efficiency by clamping voltage on the active switch.
3) A 250W prototype was built with 25V input and 240V output to demonstrate the converter's performance operating at 50kHz.
Steady-state analysis and derivations of voltage gain formulas are provided to explain the operating principles and performance advantages of the proposed
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
1) The document presents a half bridge converter topology for battery charging applications.
2) A single stage half bridge converter is proposed that provides DC voltage regulation and power factor correction with only one controller.
3) The converter operation depends on whether the inductor is operating in discontinuous or continuous conduction mode, with discontinuous mode avoiding high voltage stress at light loads.
A New Soft-Switched Resonant DC-DC ConverterIDES Editor
This paper presents a new soft-switched resonant dcdc
converter using a passive snubber circuit. The proposed
converter uses a new zero voltage and zero current switching
(ZVZCS) strategies to get ZVZCS function. Besides operating
at constant frequency, all semiconductor devices operate at
soft-switching without additional voltage and current stresses.
In order to validate the proposed converter, computer
simulations and experimental results were conducted. The
paper indicates the effective converter operation region of the
soft-switching action and its efficiency improvement results
on the basis of experimental evaluations using laboratory
prototype.
IJERD (www.ijerd.com) International Journal of Engineering Research and Devel...IJERD Editor
This document summarizes a research paper that proposes a soft-switching boost converter with an auxiliary resonant circuit (SARC) for improving the efficiency of photovoltaic (PV) energy conversion systems. The converter aims to boost the lower output voltage of solar cells to a useful voltage for loads. Simulation and experimental results confirm the converter's operational principles and soft-switching performance. Analysis shows that through SARC, all switching devices achieve zero-voltage and zero-current switching, reducing switching losses compared to conventional hard-switching converters. The converter design targets a 700W PV module, and testing with a PV simulator validates effective maximum power point tracking control.
The Analysis of Dead Time on Switching Loss in High and Low Side MOSFETs of Z...IDES Editor
This work is about the analysis of dead time variation
on switching losses in a Zero Voltage Switching (ZVS)
synchronous buck converter (SBC) circuit. In high frequency
converter circuits, switching losses are commonly linked with
high and low side switches of SBC circuit. They are activated
externally by the gate driver circuit. The duty ratio, dead time
and resonant inductor are the parameters that affect the
efficiency of the circuit. These variables can be adjusted for
the optimization purposes. The study primarily focuses on
varying the settings of input pulses of the MOSFETs in the
resonant gate driver circuit which consequently affects the
performance of the ZVS synchronous buck converter circuit.
Using the predetermined inductor of 9 nH, the frequency is
maintained at 1 MHz for each cycle transition. The switching
loss graph is obtained and switching losses for both S1 and S2
are calculated and compared to the findings from previous
work. It has shown a decrease in losses by 13.8 % in S1. A dead
time of 15 ns has been determined to be optimized value in
the SBC design.
This document describes novel multi-threshold voltage level converters that minimize power consumption without compromising speed. Conventional feedback-based level converters rely on feedback circuits that cause slow response times and short circuit currents. The novel converters proposed use multiple transistor threshold voltages to directly drive high voltage gates from low voltage signals without static currents. When used in an integrated circuit, the multi-threshold converters decrease power by 47% and optimize delay by 50% compared to feedback converters in a 0.18-μm technology.
High Voltage Gain Boost Converter for Micro source Power Conversion systemIDES Editor
The document presents a new high voltage gain boost converter design that uses a coupled inductor and voltage lift technique. Key features of the proposed converter include:
1) It can achieve a high voltage gain while operating at a duty ratio close to 0.65, allowing continuous conduction mode operation.
2) The coupled inductor design recycles energy stored in the leakage inductance, increasing efficiency by clamping voltage on the active switch.
3) A 250W prototype was built with 25V input and 240V output to demonstrate the converter's performance operating at 50kHz.
Steady-state analysis and derivations of voltage gain formulas are provided to explain the operating principles and performance advantages of the proposed
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
1) The document presents a half bridge converter topology for battery charging applications.
2) A single stage half bridge converter is proposed that provides DC voltage regulation and power factor correction with only one controller.
3) The converter operation depends on whether the inductor is operating in discontinuous or continuous conduction mode, with discontinuous mode avoiding high voltage stress at light loads.
Open Loop Control Of Series Parallel Resonant ConverterIDES Editor
Resonant converters are desirable for power
conversion due to their comparatively smaller size and
lower power losses resulting from high-frequency
operation and inherent soft switching. Among all the
topologies of the resonant converters, the series–parallel
resonant converter (SPRC) is known to have the
combined merits of the series resonant converter and
parallel resonant converter. The converter can regulate
the output voltage at a constant switching frequency even
for a change in load resistance from full load resistance to
infinity while maintaining good part load efficiency. The
purpose of this project is to design a closed loop
controller for the phase-controlled series parallel
resonant converter (PC SPRC). The open loop analysis
and closed loop control has been provided in this paper.
This document summarizes the simulation of a 5kW/20kHz soft switched DC-DC converter. It presents the design and circuit topology of a full-bridge soft switched converter using IGBTs. The converter achieves zero-voltage switching through resonance between the transformer leakage inductance and switch output capacitance. Simulation results show the converter operates at 20kHz with 415V input and 28V/215A output while realizing zero-voltage switching turn-on of the IGBTs. Key waveforms like input voltage, switching pulses, rectifier output, and transformer voltages are presented.
Design Topology of Low Profile Transformer forSlim AdaptorIJRES Journal
This paper presents the implementation of a topologyfor low profile transformer using an LLC
resonant converter. A new structure of the slim-type transformer is proposed, which is composed of copper wire
as the primary winding and printed circuit-board winding on the outer layer as the secondary winding.The
proposed circuit operates at high switching frequency to increase power density. The proposed structure is
suitable for a slim and high-efficiency converter because it has advantages of easy utilization and wide
conductive cross-sectional area. In addition, the voltage-doubler rectifier is applied to the secondary side due to
its simple structure of secondary winding, and a CLC filter is adopted to reduce the output filter size.The
specification are to design input voltage 400v,power 120w with 17ms hold time.
This document proposes a novel structure to improve the common mode rejection ratio (CMRR) of circuits like current buffers and folded cascode amplifiers. The proposed structure uses only four transistors and a current source to deviate common mode signals without affecting differential mode signals. This improves the CMRR by at least 12dB while preserving the CMRR bandwidth, which is a novel technique. The structure was applied to both a current buffer and folded cascode amplifier based on simulation results, demonstrating its effectiveness in improving CMRR.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
This document provides an overview of forward-type switched mode power supplies (SMPS). It begins by stating the objectives and introducing the basic topology, which consists of a switching device, transformer, and rectification/filtering circuit. It then explains the principles of operation, including two modes - the powering mode when the switch is on, and the freewheeling mode when it is off. Key points covered include the relationship between input/output voltages and duty cycle, and factors that influence the sizing of filter components like the switching frequency. Practical considerations like non-ideal transformer characteristics necessitate modifications to the basic circuit.
This document presents a high efficient loaded resonant converter with feedback for DC-DC energy conversion. The proposed converter consists of a half-bridge inductor-capacitor-inductor resonant inverter connected to a bridge rectifier and load. Soft switching reduces losses and improves efficiency. Simulation results show the converter achieves up to 85.8% efficiency. Feedback control provides accurate output regulation. Analysis and MATLAB simulation demonstrate the converter's improved performance for DC-DC energy conversion applications.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
EPCOS is a leading manufacturer of electronic components including capacitors, inductors, EMC filters, sensors and sensor systems, nonlinear resistors, and arresters. It focuses on technologically demanding markets in areas like information technology, automotive, industrial, and consumer electronics. EPCOS offers both standard components and application-specific solutions. It has global design, manufacturing and marketing facilities and is continually improving processes and quality management. EPCOS provides a broad portfolio of power factor correction capacitor series and components for optimizing power quality and factor.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
The document describes a charge equalization unit (CEU) for a NiCd battery used in a small earth observation satellite. The CEU uses a multi-winding transformer and isolated flyback DC-DC converters to dynamically equalize the charge between battery cells. This helps protect the battery from damage and increases its lifetime by preventing deep discharging or reverse polarity of weak cells. The CEU design and simulation results are shown for an 11-cell battery configuration.
This document discusses low power high performance baud rate generators using MTCMOS voltage interface circuits. It compares feedback based and multi-VTH based voltage level converters that are used in baud rate generators to interface between circuits operating at different voltage levels. The multi-VTH level converters are found to offer significant power savings compared to feedback based converters. A baud rate generator is designed and simulated using different level converters in 90nm CMOS technology. The multi-VTH level converter LC5 provides the lowest power when used in the baud rate generator.
This document summarizes a research paper on controlling an induction motor using a 5-level PWM inverter with field oriented control techniques. It discusses multi-level PWM inverters, field oriented control, and the hardware and software implementation of a system using a microcontroller to generate PWM signals for controlling an induction motor. Experimental results are presented using a 5-level inverter to drive a 0.5 HP induction motor based on this control scheme.
1) The document presents a single-phase five-level photovoltaic (PV) inverter topology for grid-connected PV systems. A novel pulsewidth modulation (PWM) control scheme is used.
2) The inverter offers much less total harmonic distortion and can operate at near-unity power factor. A digital PID current control algorithm is implemented to keep the current injected into the grid sinusoidal.
3) The proposed system is verified through simulation and a prototype. Experimental results are compared to a conventional single-phase three-level grid-connected PWM inverter, showing the benefits of the five-level inverter configuration.
DC Motor Fed with Double Input Z-Source DC-DC ConverterIJMER
The document presents a double input Z-source DC-DC converter to power a DC motor. Some key points:
- The converter allows two DC voltage sources to power the load individually or simultaneously for applications using multiple energy sources.
- It consists of two DC sources, four diodes, split inductors and capacitors in a 'Z-network', and a switch. There are four operating states based on the active/inactive states of the two sources.
- In state 1, both sources are active so the input voltage is the sum of the two voltages. In states 2 and 3, one source is active while the other is inactive. In state 4, both sources are inactive.
-
This document describes a study comparing the power dissipation of a 2:1 multiplexer designed using static CMOS logic versus an adiabatic logic style called 2PADCL (Two Phase Adiabatic Dynamic CMOS Logic). The 2:1 multiplexer was designed and simulated using both logic styles. Simulation results found that the multiplexer using 2PADCL adiabatic logic consumed significantly less power than the static CMOS implementation, with power savings of up to 65% observed under certain operating conditions. Adiabatic logic styles like 2PADCL achieve lower power by slowly charging and discharging circuit nodes and recycling stored charge, rather than abruptly switching nodes from 0V to the supply voltage.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERD (www.ijerd.com) International Journal of Engineering Research and Devel...IJERD Editor
This document summarizes a research paper that proposes a soft-switching boost converter with an auxiliary resonant circuit (SARC) for improving the efficiency of photovoltaic (PV) energy conversion systems. The converter is designed to boost the variable output voltage of a solar module. Simulation and experimental results confirm the converter's operational principles and soft-switching performance. The converter achieves zero-voltage switching and zero-current switching, reducing switching losses compared to conventional hard-switching converters. The design procedure and component values for the resonant inductor and capacitor in the SARC are also described.
Review of Step down Converter with Efficient ZVS OperationIJRST Journal
This paper presents the review of step down converter with efficient ZVS operation. The designed buck converter uses ZCS technique and the function is realized so that the power form is converted from 12V DC 5V DC (1A). A detailed analysis of zero current switching buck converters is performed and a mathematical analysis of the mode of operation is also presented. In order to reduce the switching losses in associated with conventional converters; resonant inductor and resonant capacitor (LC resonant circuit) is applied which helps to turn on-off the switch at zero current. The dc-dc buck converter receives the energy from the input source, when the switch is turned-on. The buck–buck converters have characteristics that warrant a more detailed study. The buck converters under discontinuous conduction mode /continuous conduction mode boundary.
Design of an Integrated Power Factor Converter with PI Controller for Low Pow...IOSRJEEE
In this paper, an integrated power factor converter with PI controller is proposed. The circuit topology is obtained by integrating two converters namely the buck converter and a boost converter. The boost converter is normally a step up converter which obtain an unity power factor and performs low harmonics at the input. Based on the simple circuit topology and easy control the boost converter or buck-boost converter is used as power factor correctors. Similarly the buck converter regulates the dc-link voltage and provide a stable dc output voltage. To achieve unity power factor, the output voltage of both converter should be higher than the amplitude of the ac line voltage. The steady -state analysis is developed and a design is provided
Open Loop Control Of Series Parallel Resonant ConverterIDES Editor
Resonant converters are desirable for power
conversion due to their comparatively smaller size and
lower power losses resulting from high-frequency
operation and inherent soft switching. Among all the
topologies of the resonant converters, the series–parallel
resonant converter (SPRC) is known to have the
combined merits of the series resonant converter and
parallel resonant converter. The converter can regulate
the output voltage at a constant switching frequency even
for a change in load resistance from full load resistance to
infinity while maintaining good part load efficiency. The
purpose of this project is to design a closed loop
controller for the phase-controlled series parallel
resonant converter (PC SPRC). The open loop analysis
and closed loop control has been provided in this paper.
This document summarizes the simulation of a 5kW/20kHz soft switched DC-DC converter. It presents the design and circuit topology of a full-bridge soft switched converter using IGBTs. The converter achieves zero-voltage switching through resonance between the transformer leakage inductance and switch output capacitance. Simulation results show the converter operates at 20kHz with 415V input and 28V/215A output while realizing zero-voltage switching turn-on of the IGBTs. Key waveforms like input voltage, switching pulses, rectifier output, and transformer voltages are presented.
Design Topology of Low Profile Transformer forSlim AdaptorIJRES Journal
This paper presents the implementation of a topologyfor low profile transformer using an LLC
resonant converter. A new structure of the slim-type transformer is proposed, which is composed of copper wire
as the primary winding and printed circuit-board winding on the outer layer as the secondary winding.The
proposed circuit operates at high switching frequency to increase power density. The proposed structure is
suitable for a slim and high-efficiency converter because it has advantages of easy utilization and wide
conductive cross-sectional area. In addition, the voltage-doubler rectifier is applied to the secondary side due to
its simple structure of secondary winding, and a CLC filter is adopted to reduce the output filter size.The
specification are to design input voltage 400v,power 120w with 17ms hold time.
This document proposes a novel structure to improve the common mode rejection ratio (CMRR) of circuits like current buffers and folded cascode amplifiers. The proposed structure uses only four transistors and a current source to deviate common mode signals without affecting differential mode signals. This improves the CMRR by at least 12dB while preserving the CMRR bandwidth, which is a novel technique. The structure was applied to both a current buffer and folded cascode amplifier based on simulation results, demonstrating its effectiveness in improving CMRR.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
This document provides an overview of forward-type switched mode power supplies (SMPS). It begins by stating the objectives and introducing the basic topology, which consists of a switching device, transformer, and rectification/filtering circuit. It then explains the principles of operation, including two modes - the powering mode when the switch is on, and the freewheeling mode when it is off. Key points covered include the relationship between input/output voltages and duty cycle, and factors that influence the sizing of filter components like the switching frequency. Practical considerations like non-ideal transformer characteristics necessitate modifications to the basic circuit.
This document presents a high efficient loaded resonant converter with feedback for DC-DC energy conversion. The proposed converter consists of a half-bridge inductor-capacitor-inductor resonant inverter connected to a bridge rectifier and load. Soft switching reduces losses and improves efficiency. Simulation results show the converter achieves up to 85.8% efficiency. Feedback control provides accurate output regulation. Analysis and MATLAB simulation demonstrate the converter's improved performance for DC-DC energy conversion applications.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
EPCOS is a leading manufacturer of electronic components including capacitors, inductors, EMC filters, sensors and sensor systems, nonlinear resistors, and arresters. It focuses on technologically demanding markets in areas like information technology, automotive, industrial, and consumer electronics. EPCOS offers both standard components and application-specific solutions. It has global design, manufacturing and marketing facilities and is continually improving processes and quality management. EPCOS provides a broad portfolio of power factor correction capacitor series and components for optimizing power quality and factor.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
The document describes a charge equalization unit (CEU) for a NiCd battery used in a small earth observation satellite. The CEU uses a multi-winding transformer and isolated flyback DC-DC converters to dynamically equalize the charge between battery cells. This helps protect the battery from damage and increases its lifetime by preventing deep discharging or reverse polarity of weak cells. The CEU design and simulation results are shown for an 11-cell battery configuration.
This document discusses low power high performance baud rate generators using MTCMOS voltage interface circuits. It compares feedback based and multi-VTH based voltage level converters that are used in baud rate generators to interface between circuits operating at different voltage levels. The multi-VTH level converters are found to offer significant power savings compared to feedback based converters. A baud rate generator is designed and simulated using different level converters in 90nm CMOS technology. The multi-VTH level converter LC5 provides the lowest power when used in the baud rate generator.
This document summarizes a research paper on controlling an induction motor using a 5-level PWM inverter with field oriented control techniques. It discusses multi-level PWM inverters, field oriented control, and the hardware and software implementation of a system using a microcontroller to generate PWM signals for controlling an induction motor. Experimental results are presented using a 5-level inverter to drive a 0.5 HP induction motor based on this control scheme.
1) The document presents a single-phase five-level photovoltaic (PV) inverter topology for grid-connected PV systems. A novel pulsewidth modulation (PWM) control scheme is used.
2) The inverter offers much less total harmonic distortion and can operate at near-unity power factor. A digital PID current control algorithm is implemented to keep the current injected into the grid sinusoidal.
3) The proposed system is verified through simulation and a prototype. Experimental results are compared to a conventional single-phase three-level grid-connected PWM inverter, showing the benefits of the five-level inverter configuration.
DC Motor Fed with Double Input Z-Source DC-DC ConverterIJMER
The document presents a double input Z-source DC-DC converter to power a DC motor. Some key points:
- The converter allows two DC voltage sources to power the load individually or simultaneously for applications using multiple energy sources.
- It consists of two DC sources, four diodes, split inductors and capacitors in a 'Z-network', and a switch. There are four operating states based on the active/inactive states of the two sources.
- In state 1, both sources are active so the input voltage is the sum of the two voltages. In states 2 and 3, one source is active while the other is inactive. In state 4, both sources are inactive.
-
This document describes a study comparing the power dissipation of a 2:1 multiplexer designed using static CMOS logic versus an adiabatic logic style called 2PADCL (Two Phase Adiabatic Dynamic CMOS Logic). The 2:1 multiplexer was designed and simulated using both logic styles. Simulation results found that the multiplexer using 2PADCL adiabatic logic consumed significantly less power than the static CMOS implementation, with power savings of up to 65% observed under certain operating conditions. Adiabatic logic styles like 2PADCL achieve lower power by slowly charging and discharging circuit nodes and recycling stored charge, rather than abruptly switching nodes from 0V to the supply voltage.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERD (www.ijerd.com) International Journal of Engineering Research and Devel...IJERD Editor
This document summarizes a research paper that proposes a soft-switching boost converter with an auxiliary resonant circuit (SARC) for improving the efficiency of photovoltaic (PV) energy conversion systems. The converter is designed to boost the variable output voltage of a solar module. Simulation and experimental results confirm the converter's operational principles and soft-switching performance. The converter achieves zero-voltage switching and zero-current switching, reducing switching losses compared to conventional hard-switching converters. The design procedure and component values for the resonant inductor and capacitor in the SARC are also described.
Review of Step down Converter with Efficient ZVS OperationIJRST Journal
This paper presents the review of step down converter with efficient ZVS operation. The designed buck converter uses ZCS technique and the function is realized so that the power form is converted from 12V DC 5V DC (1A). A detailed analysis of zero current switching buck converters is performed and a mathematical analysis of the mode of operation is also presented. In order to reduce the switching losses in associated with conventional converters; resonant inductor and resonant capacitor (LC resonant circuit) is applied which helps to turn on-off the switch at zero current. The dc-dc buck converter receives the energy from the input source, when the switch is turned-on. The buck–buck converters have characteristics that warrant a more detailed study. The buck converters under discontinuous conduction mode /continuous conduction mode boundary.
Design of an Integrated Power Factor Converter with PI Controller for Low Pow...IOSRJEEE
In this paper, an integrated power factor converter with PI controller is proposed. The circuit topology is obtained by integrating two converters namely the buck converter and a boost converter. The boost converter is normally a step up converter which obtain an unity power factor and performs low harmonics at the input. Based on the simple circuit topology and easy control the boost converter or buck-boost converter is used as power factor correctors. Similarly the buck converter regulates the dc-link voltage and provide a stable dc output voltage. To achieve unity power factor, the output voltage of both converter should be higher than the amplitude of the ac line voltage. The steady -state analysis is developed and a design is provided
Design of Half Bridge LLC Resonant Converter for Low Voltage Dc ApplicationsIOSRJEEE
An advanced hybrid LLC series resonant converter with united flying-capacitor cell is proposed in this paper to permit the high step-down conversion in the high input voltage applications. The in-built flyingcapacitor branch in the primary side can efficiently share out the primary switch voltage stress related with the half-bridge LLC converters. And the input voltage can be shared correspondingly and automatically between the two series half-bridge components lacking additional balance circuit or control strategies owing to the built-in flying- capacitor cell. Likewise, the inherent soft switching performance in extensive load range that exists in the LLC converters is still kept to decrease the switching losses, which ensures the high efficiency. In addition, the proposed converter can be comprehensive to reduce the switch voltage stress byemploying stacked connection. Finally, a 500∼640 Vinput 48 Voutput 1 kW prototype is built and tested to verify the efficiency of the proposed converter. The results prove that the proposed converter is an excellent candidate for the high input voltage and high step-down dc/dc conversion systems.
SIMULATION ANALYSIS OF CLOSED LOOP DUAL INDUCTOR CURRENT-FED PUSH-PULL CONVER...Journal For Research
The current electronic devices require DC power source, which is taken from a battery or DC power supply. DC-DC converter is utilized to get regulated dc voltage from unregulated one. Switched mode power supply (SMPS) are commonly used in industrial applications, because of more advantages compared to linear power supply. In SMPS we have isolated and non-isolated converters, where isolated converters are frequently used, in order to get more voltage with multiple outputs. So among different isolated converters, push-pull converter is chosen for micro converter applications to obtain high voltage conversion ratio by using HF transformer, due to their better utilization of transformer. New methodology of control is implemented for making ZVS and ZCS at same time and to reduce the number of switches in the secondary side of dual inductor CFPP converter, which is a voltage doubler circuit. This becomes the solution for problem identification. Thus this converter with soft-switching reduces the switching losses.The current-fed push-pull converters are used in many applications like photo-voltaic (PV) power converters for boosting the output voltage. Push-pull converter is chosen for micro converter applications, to obtain high voltage conversion ratio by using high frequency (HF) transformer, due to their better utilization of transformer. This deals with the design of dual inductor CFPP converter, where zero voltage switching (ZVS) and zero current switching (ZCS) is achieved for the primary side of the converter by using secondary switches. Primary side switches are controlled by closed loop control topology. The secondary side is made with voltage doubler to obtain high voltage. Open loop and closed loop control of dual inductor current fed push pull converter simulation is finished by MATLAB/SIMULINK and their outcomes are analyzed.
Extremely high duty cycle of boost converter may result in higher conduction losses. To achieve a high
conversion ratio without operating at extremely high duty ratio, some converters based on transformers or coupled
inductors or tapped inductors have been provided. However, the leakage inductance in the transformer, coupled
inductor or tapped inductor will cause high voltage spikes in the switches and reduce system efficiency. A novel
single switch cascaded dc-dc converter of boost and buck boost converters have extended voltage conversion ratio
to d/(1-d)2. The features of the converter are high voltage gain; only one switch for realizing the converter, the
number of magnetic components is small etc. So comparing with other topologies cascaded converter is more
effective. Simulation of the converter for a dc input voltage and fixed duty cycle was done, and the same was
verified experimentally for a low input voltage. The software used for simulation was MatlabR2014a
Modelling of high step up dc dc converter for photovoltaic modulesIAEME Publication
This document summarizes a research paper on modelling a high step-up DC-DC converter for photovoltaic modules. The converter uses a coupled inductor to achieve high voltage gain from a low PV panel output voltage. It operates in both continuous conduction mode and discontinuous conduction mode. Simulation results show the output voltage is regulated at 150V with a photovoltaic array input. The converter has benefits of high efficiency, reduced component stress, and isolation of the PV panel during non-operation for safety.
Speed Control Of Separately Excited Dc Motor Using A High Efficiency Flyback ...IJERA Editor
This paper deals with Speed control of separately excited DC motor using flyback converter with a new non complementary active clamp control method to achieve soft switching and high efficiency for heavy motor load and light load conditions. This is quite attractive for low power application with universal ac inputs, such as external adaptors. With the proposed control technique, the energy in the leakage inductance can be fully recycled. The soft switching can be achieved for the main switch and the absorbed leakage energy is transferred to the output and input side. In the Proposed model the resistive and DC motor is connected to flyback converter and it is simulated with different nominal voltages and rated speed is controlled at different levels for the N-type active clamp flyback converter and P-type active clamp flyback converter respectively. N-type active clamp flyback converter is suitable for high speed variation applications and P-type active clamp flyback converter is suitable for low speed variation applications.
This document summarizes a research paper on modeling DC-DC converters with high frequencies using state space analysis. The paper presents an approach to modeling that avoids assuming constant current ripples, allowing for a better representation at high frequencies. State space averaging is commonly used to model PWM DC-DC converters but has limitations. The presented approach generalizes state space averaging to account for harmonics' effects, transforming time-varying models into time-invariant linear models. Equations for the state space model of a buck converter are provided both when operating and when turned off, and the average state model is derived. The goal is to improve performance for load and input variations through implicit feedforward compensation.
This document provides an overview and comparison of different types of DC-DC converters. It first introduces DC-DC converters and their applications. It then discusses various types of DC-DC converters in more detail, including buck, boost, buck-boost and CUK converters. For each converter type, it describes the basic operation and steady-state analysis. The document aims to compare performance of different converter topologies.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
The document summarizes a proposed non-isolated ZVZCS resonant PWM converter for high step-up and high power applications. The proposed converter uses an interleaved structure of basic cells connected in series and parallel to achieve flexibility in device selection. It allows soft-switching turn-on of switches via zero-voltage switching and turn-off of diodes via zero-current switching through the use of an auxiliary circuit. Simulation results are provided to validate the converter's operation and advantages over conventional hard-switched converters, such as reduced switch voltage and current stresses leading to higher efficiency.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Design and Control of Half-Bridge Resonant Converter Topology of PID ControllerIRJET Journal
This document discusses the design and control of a half-bridge resonant converter topology using a PID controller. It describes how a closed loop LLC resonant DC-DC half-bridge converter with a PID controller can provide constant output voltage for both linear and non-linear loads. The converter is simulated in MATLAB/Simulink and the hardware is tested, showing high efficiency of 95% and constant output voltage regulation. Key aspects of the half-bridge resonant converter such as the resonant tank circuit and soft switching operation are explained.
2 twofold mode series echoing dc dc converter for ample loadchelliah paramasivan
The document describes a dual-mode full-bridge series resonant DC-DC converter that can operate at either a variable switching frequency or a fixed switching frequency with phase-shifted pulse width modulation to regulate the output voltage over a wide range of loads. The converter uses a series resonant tank consisting of an inductor and capacitor to achieve soft switching and zero voltage switching of the transistors. It can operate in a frequency modulation mode at high loads by varying the switching frequency, or in a phase modulation mode at light loads using a fixed high switching frequency and varying the duty cycle through phase-shifted pulse width modulation. This dual-mode operation provides high conversion efficiency across a wide range of loads.
Comparison of an Isolated bidirectional Dc-Dc converter with and without a Fl...IOSR Journals
This document compares an isolated bidirectional DC-DC converter with and without a flyback snubber through simulation and hardware implementation. It begins with an introduction to isolated bidirectional converters and the problem of voltage spikes caused by transformer leakage inductance. It then describes the operation and components of the converter both with and without a flyback snubber. Simulation results show that the flyback snubber reduces voltage spikes by 78-80% by clamping the voltage. Hardware results for boost mode operation with a flyback snubber are also presented and agree with simulation.
Seminor on resonant and soft switching converterAnup Kumar
Soft Switching Techniques Are Highly Recommended To Reduce Switching Losses And Conduction Losses, During Each Turning On & Turning Off of Power Electronics Devices.
PID Compensator Control Scheme of Synchronous Buck DC-DC Converter with ZVS L...IJRES Journal
This paper deals with PID compensator control of Synchronous Rectifier (SR) Buck Converter to improve its conversion efficiency under different load conditions with the help of a Zero Voltage Switching(ZVS)Logic Circuit. Since the freewheeling diode is replaced by a high frequency switch MOSFET in this buck configuration, the SR control technique itself will be sufficient under heavy load condition to attain better normal mode performance. However, this technique does not hold well in light load condition, due to increased switching losses. A newPID compensator control techniqueis introduced in the paper will enable synchronous buck converter to realize ZVS, while feeding light load. This is also cost effective and highly efficient simple control method without use of extra auxiliary switches and RLC components. This control technique also proved to be efficient under input voltage variations. Simulation is done for proving stabilization provided by the PID compensator with the help of ZVS logic circuit for synchronous rectifier (SR) buck converter in MATLAB Simulink.
Similar to A New Soft-Switched Resonant DC-DC Converter (20)
Power System State Estimation - A ReviewIDES Editor
This document provides a review of power system state estimation techniques. It discusses both static and dynamic state estimation algorithms. For static state estimation, it covers weighted least squares, decoupled, and robust estimation methods. Weighted least squares is commonly used but can have numerical instability issues. Decoupled state estimation approximates the gain matrix for faster computation. Robust estimation uses M-estimators and other techniques to handle outliers and bad data. Dynamic state estimation applies Kalman filtering, leapfrog algorithms, and other methods to continuously monitor system states over time.
Artificial Intelligence Technique based Reactive Power Planning Incorporating...IDES Editor
This document summarizes a research paper that proposes using artificial intelligence techniques and FACTS controllers for reactive power planning in real-time power transmission systems. The paper formulates the reactive power planning problem and incorporates flexible AC transmission system (FACTS) devices like static VAR compensators (SVC), thyristor controlled series capacitors (TCSC), and unified power flow controllers (UPFC). Evolutionary algorithms like evolutionary programming (EP) and differential evolution (DE) are applied to find the optimal locations and settings of the FACTS controllers to minimize losses and costs. Simulation results on IEEE 30-bus and 72-bus Indian test systems show that UPFC performs best in reducing losses compared to SVC and TCSC.
Design and Performance Analysis of Genetic based PID-PSS with SVC in a Multi-...IDES Editor
Damping of power system oscillations with the help
of proposed optimal Proportional Integral Derivative Power
System Stabilizer (PID-PSS) and Static Var Compensator
(SVC)-based controllers are thoroughly investigated in this
paper. This study presents robust tuning of PID-PSS and
SVC-based controllers using Genetic Algorithms (GA) in
multi machine power systems by considering detailed model
of the generators (model 1.1). The effectiveness of FACTSbased
controllers in general and SVC-based controller in
particular depends upon their proper location. Modal
controllability and observability are used to locate SVC–based
controller. The performance of the proposed controllers is
compared with conventional lead-lag power system stabilizer
(CPSS) and demonstrated on 10 machines, 39 bus New England
test system. Simulation studies show that the proposed genetic
based PID-PSS with SVC based controller provides better
performance.
Optimal Placement of DG for Loss Reduction and Voltage Sag Mitigation in Radi...IDES Editor
This paper presents the need to operate the power
system economically and with optimum levels of voltages has
further led to an increase in interest in Distributed
Generation. In order to reduce the power losses and to improve
the voltage in the distribution system, distributed generators
(DGs) are connected to load bus. To reduce the total power
losses in the system, the most important process is to identify
the proper location for fixing and sizing of DGs. It presents a
new methodology using a new population based meta heuristic
approach namely Artificial Bee Colony algorithm(ABC) for
the placement of Distributed Generators(DG) in the radial
distribution systems to reduce the real power losses and to
improve the voltage profile, voltage sag mitigation. The power
loss reduction is important factor for utility companies because
it is directly proportional to the company benefits in a
competitive electricity market, while reaching the better power
quality standards is too important as it has vital effect on
customer orientation. In this paper an ABC algorithm is
developed to gain these goals all together. In order to evaluate
sag mitigation capability of the proposed algorithm, voltage
in voltage sensitive buses is investigated. An existing 20KV
network has been chosen as test network and results are
compared with the proposed method in the radial distribution
system.
Line Losses in the 14-Bus Power System Network using UPFCIDES Editor
Controlling power flow in modern power systems
can be made more flexible by the use of recent developments
in power electronic and computing control technology. The
Unified Power Flow Controller (UPFC) is a Flexible AC
transmission system (FACTS) device that can control all the
three system variables namely line reactance, magnitude and
phase angle difference of voltage across the line. The UPFC
provides a promising means to control power flow in modern
power systems. Essentially the performance depends on proper
control setting achievable through a power flow analysis
program. This paper presents a reliable method to meet the
requirements by developing a Newton-Raphson based load
flow calculation through which control settings of UPFC can
be determined for the pre-specified power flow between the
lines. The proposed method keeps Newton-Raphson Load Flow
(NRLF) algorithm intact and needs (little modification in the
Jacobian matrix). A MATLAB program has been developed to
calculate the control settings of UPFC and the power flow
between the lines after the load flow is converged. Case studies
have been performed on IEEE 5-bus system and 14-bus system
to show that the proposed method is effective. These studies
indicate that the method maintains the basic NRLF properties
such as fast computational speed, high degree of accuracy and
good convergence rate.
Study of Structural Behaviour of Gravity Dam with Various Features of Gallery...IDES Editor
The size and shape of opening in dam causes the
stress concentration, it also causes the stress variation in the
rest of the dam cross section. The gravity method of the analysis
does not consider the size of opening and the elastic property
of dam material. Thus the objective of study is comprises of
the Finite Element Method which considers the size of
opening, elastic property of material, and stress distribution
because of geometric discontinuity in cross section of dam.
Stress concentration inside the dam increases with the opening
in dam which results in the failure of dam. Hence it is
necessary to analyses large opening inside the dam. By making
the percentage area of opening constant and varying size and
shape of opening the analysis is carried out. For this purpose
a section of Koyna Dam is considered. Dam is defined as a
plane strain element in FEM, based on geometry and loading
condition. Thus this available information specified our path
of approach to carry out 2D plane strain analysis. The results
obtained are then compared mutually to get most efficient
way of providing large opening in the gravity dam.
Assessing Uncertainty of Pushover Analysis to Geometric ModelingIDES Editor
Pushover Analysis a popular tool for seismic
performance evaluation of existing and new structures and is
nonlinear Static procedure where in monotonically increasing
loads are applied to the structure till the structure is unable
to resist the further load .During the analysis, whatever the
strength of concrete and steel is adopted for analysis of
structure may not be the same when real structure is
constructed and the pushover analysis results are very sensitive
to material model adopted, geometric model adopted, location
of plastic hinges and in general to procedure followed by the
analyzer. In this paper attempt has been made to assess
uncertainty in pushover analysis results by considering user
defined hinges and frame modeled as bare frame and frame
with slab modeled as rigid diaphragm and results compared
with experimental observations. Uncertain parameters
considered includes the strength of concrete, strength of steel
and cover to the reinforcement which are randomly generated
and incorporated into the analysis. The results are then
compared with experimental observations.
Secure Multi-Party Negotiation: An Analysis for Electronic Payments in Mobile...IDES Editor
This document summarizes and analyzes secure multi-party negotiation protocols for electronic payments in mobile computing. It presents a framework for secure multi-party decision protocols using lightweight implementations. The main focus is on synchronizing security features to avoid agreement manipulation and reduce user traffic. The paper describes negotiation between an auctioneer and bidders, showing multiparty security is better than existing systems. It analyzes the performance of encryption algorithms like ECC, XTR, and RSA for use in the multiparty negotiation protocols.
Selfish Node Isolation & Incentivation using Progressive ThresholdsIDES Editor
The problems associated with selfish nodes in
MANET are addressed by a collaborative watchdog approach
which reduces the detection time for selfish nodes thereby
improves the performance and accuracy of watchdogs[1]. In
the related works they make use of credit based systems, reputation
based mechanisms, pathrater and watchdog mechanism
to detect such selfish nodes. In this paper we follow an approach
of collaborative watchdog which reduces the detection
time for selfish nodes and also involves the removal of such
selfish nodes based on some progressively assessed thresholds.
The threshold gives the nodes a chance to stop misbehaving
before it is permanently deleted from the network.
The node passes through several isolation processes before it
is permanently removed. Another version of AODV protocol
is used here which allows the simulation of selfish nodes in
NS2 by adding or modifying log files in the protocol.
Various OSI Layer Attacks and Countermeasure to Enhance the Performance of WS...IDES Editor
Wireless sensor networks are networks having non
wired infrastructure and dynamic topology. In OSI model each
layer is prone to various attacks, which halts the performance
of a network .In this paper several attacks on four layers of
OSI model are discussed and security mechanism is described
to prevent attack in network layer i.e wormhole attack. In
Wormhole attack two or more malicious nodes makes a covert
channel which attracts the traffic towards itself by depicting a
low latency link and then start dropping and replaying packets
in the multi-path route. This paper proposes promiscuous mode
method to detect and isolate the malicious node during
wormhole attack by using Ad-hoc on demand distance vector
routing protocol (AODV) with omnidirectional antenna. The
methodology implemented notifies that the nodes which are
not participating in multi-path routing generates an alarm
message during delay and then detects and isolate the
malicious node from network. We also notice that not only
the same kind of attacks but also the same kind of
countermeasures can appear in multiple layer. For example,
misbehavior detection techniques can be applied to almost all
the layers we discussed.
Responsive Parameter based an AntiWorm Approach to Prevent Wormhole Attack in...IDES Editor
The recent advancements in the wireless technology
and their wide-spread deployment have made remarkable
enhancements in efficiency in the corporate and industrial
and Military sectors The increasing popularity and usage of
wireless technology is creating a need for more secure wireless
Ad hoc networks. This paper aims researched and developed
a new protocol that prevents wormhole attacks on a ad hoc
network. A few existing protocols detect wormhole attacks but
they require highly specialized equipment not found on most
wireless devices. This paper aims to develop a defense against
wormhole attacks as an Anti-worm protocol which is based on
responsive parameters, that does not require as a significant
amount of specialized equipment, trick clock synchronization,
no GPS dependencies.
Cloud Security and Data Integrity with Client Accountability FrameworkIDES Editor
This document summarizes a proposed cloud security and data integrity framework that provides client accountability. The framework aims to address issues like lack of user control over cloud data, need for data transparency and tracking, and ensuring data integrity. It proposes using JAR (Java Archive) files for data sharing due to benefits like portability. The framework incorporates client-side verification using MD5 hashing, digital signature-based authentication of JAR files, and use of HMAC to ensure data integrity. It also uses password-based encryption of log files to keep them tamper-proof. The framework is intended to provide both accountability and security for data sharing in cloud environments.
Genetic Algorithm based Layered Detection and Defense of HTTP BotnetIDES Editor
A System state in HTTP botnet uses HTTP protocol
for the creation of chain of Botnets thereby compromising
other systems. By using HTTP protocol and port number 80,
attacks can not only be hidden but also pass through the
firewall without being detected. The DPR based detection
leads to better analysis of botnet attacks [3]. However, it
provides only probabilistic detection of the attacker and also
time consuming and error prone. This paper proposes a Genetic
algorithm based layered approach for detecting as well as
preventing botnet attacks. The paper reviews p2p firewall
implementation which forms the basis of filtering.
Performance evaluation is done based on precision, F-value
and probability. Layered approach reduces the computation
and overall time requirement [7]. Genetic algorithm promises
a low false positive rate.
Enhancing Data Storage Security in Cloud Computing Through SteganographyIDES Editor
This document summarizes a research paper that proposes a method for enhancing data security in cloud computing through steganography. The method hides user data in digital images stored on cloud servers. When data needs to be accessed, it is extracted from the images. The document outlines the cloud architecture and security issues addressed. It then describes the proposed system architecture, security model, and data storage and retrieval process. Data is partitioned and hidden in multiple images to improve security. The goal is to prevent unauthorized access to user data stored on cloud servers.
The main tasks of a Wireless Sensor Network
(WSN) are data collection from its nodes and communication
of this data to the base station (BS). The protocols used for
communication among the WSN nodes and between the WSN
and the BS, must consider the resource constraints of nodes,
battery energy, computational capabilities and memory. The
WSN applications involve unattended operation of the network
over an extended period of time. In order to extend the lifetime
of a WSN, efficient routing protocols need to be adopted. The
proposed low power routing protocol based on tree-based
network structure reliably forwards the measured data towards
the BS using TDMA. An energy consumption analysis of the
WSN making use of this protocol is also carried out. It is
found that the network is energy efficient with an average
duty cycle of 0:7% for the WSN nodes. The OmNET++
simulation platform along with MiXiM framework is made
use of.
Permutation of Pixels within the Shares of Visual Cryptography using KBRP for...IDES Editor
The security of authentication of internet based
co-banking services should not be susceptible to high risks.
The passwords are highly vulnerable to virus attacks due to
the lack of high end embedding of security methods. In order
for the passwords to be more secure, people are generally
compelled to select jumbled up character based passwords
which are not only less memorable but are also equally prone
to insecurity. Multiple use of distributed shares has been
studied to solve the problem of authentication by algorithms
based on thresholding of pixels in image processing and visual
cryptography concepts where the subset of shares is considered
for the recovery of the original image for authentication using
correlation function[1][2].The main disadvantage in the above
study is the plain storage of shares and also one of the shares
is being supplied to the customer, which will lead to the
possibility of misuse by a third party. This paper proposes a
technique for scrambling of pixels by key based random
permutation (KBRP) within the shares before the
authentication has been attempted. Total number of shares to
be created is dependent on the multiplicity of ownership of
the account. By this method the problem of uncertainty among
the customers with regard to security, storage, retrieval of
holding of half of the shares is minimized.
This paper presents a trifocal Rotman Lens Design
approach. The effects of focal ratio and element spacing on
the performance of Rotman Lens are described. A three beam
prototype feeding 4 element antenna array working in L-band
has been simulated using RLD v1.7 software. Simulated
results show that the simulated lens has a return loss of –
12.4dB at 1.8GHz. Beam to array port phase error variation
with change in the focal ratio and element spacing has also
been investigated.
Band Clustering for the Lossless Compression of AVIRIS Hyperspectral ImagesIDES Editor
Hyperspectral images can be efficiently compressed
through a linear predictive model, as for example the one
used in the SLSQ algorithm. In this paper we exploit this
predictive model on the AVIRIS images by individuating,
through an off-line approach, a common subset of bands, which
are not spectrally related with any other bands. These bands
are not useful as prediction reference for the SLSQ 3-D
predictive model and we need to encode them via other
prediction strategies which consider only spatial correlation.
We have obtained this subset by clustering the AVIRIS bands
via the clustering by compression approach. The main result
of this paper is the list of the bands, not related with the
others, for AVIRIS images. The clustering trees obtained for
AVIRIS and the relationship among bands they depict is also
an interesting starting point for future research.
Microelectronic Circuit Analogous to Hydrogen Bonding Network in Active Site ...IDES Editor
A microelectronic circuit of block-elements
functionally analogous to two hydrogen bonding networks is
investigated. The hydrogen bonding networks are extracted
from â-lactamase protein and are formed in its active site.
Each hydrogen bond of the network is described in equivalent
electrical circuit by three or four-terminal block-element.
Each block-element is coded in Matlab. Static and dynamic
analyses are performed. The resultant microelectronic circuit
analogous to the hydrogen bonding network operates as
current mirror, sine pulse source, triangular pulse source as
well as signal modulator.
Texture Unit based Monocular Real-world Scene Classification using SOM and KN...IDES Editor
In this paper a method is proposed to discriminate
real world scenes in to natural and manmade scenes of similar
depth. Global-roughness of a scene image varies as a function
of image-depth. Increase in image depth leads to increase in
roughness in manmade scenes; on the contrary natural scenes
exhibit smooth behavior at higher image depth. This particular
arrangement of pixels in scene structure can be well explained
by local texture information in a pixel and its neighborhood.
Our proposed method analyses local texture information of a
scene image using texture unit matrix. For final classification
we have used both supervised and unsupervised learning using
K-Nearest Neighbor classifier (KNN) and Self Organizing
Map (SOM) respectively. This technique is useful for online
classification due to very less computational complexity.
This presentation provides valuable insights into effective cost-saving techniques on AWS. Learn how to optimize your AWS resources by rightsizing, increasing elasticity, picking the right storage class, and choosing the best pricing model. Additionally, discover essential governance mechanisms to ensure continuous cost efficiency. Whether you are new to AWS or an experienced user, this presentation provides clear and practical tips to help you reduce your cloud costs and get the most out of your budget.
Programming Foundation Models with DSPy - Meetup SlidesZilliz
Prompting language models is hard, while programming language models is easy. In this talk, I will discuss the state-of-the-art framework DSPy for programming foundation models with its powerful optimizers and runtime constraint system.
TrustArc Webinar - 2024 Global Privacy SurveyTrustArc
How does your privacy program stack up against your peers? What challenges are privacy teams tackling and prioritizing in 2024?
In the fifth annual Global Privacy Benchmarks Survey, we asked over 1,800 global privacy professionals and business executives to share their perspectives on the current state of privacy inside and outside of their organizations. This year’s report focused on emerging areas of importance for privacy and compliance professionals, including considerations and implications of Artificial Intelligence (AI) technologies, building brand trust, and different approaches for achieving higher privacy competence scores.
See how organizational priorities and strategic approaches to data security and privacy are evolving around the globe.
This webinar will review:
- The top 10 privacy insights from the fifth annual Global Privacy Benchmarks Survey
- The top challenges for privacy leaders, practitioners, and organizations in 2024
- Key themes to consider in developing and maintaining your privacy program
Driving Business Innovation: Latest Generative AI Advancements & Success StorySafe Software
Are you ready to revolutionize how you handle data? Join us for a webinar where we’ll bring you up to speed with the latest advancements in Generative AI technology and discover how leveraging FME with tools from giants like Google Gemini, Amazon, and Microsoft OpenAI can supercharge your workflow efficiency.
During the hour, we’ll take you through:
Guest Speaker Segment with Hannah Barrington: Dive into the world of dynamic real estate marketing with Hannah, the Marketing Manager at Workspace Group. Hear firsthand how their team generates engaging descriptions for thousands of office units by integrating diverse data sources—from PDF floorplans to web pages—using FME transformers, like OpenAIVisionConnector and AnthropicVisionConnector. This use case will show you how GenAI can streamline content creation for marketing across the board.
Ollama Use Case: Learn how Scenario Specialist Dmitri Bagh has utilized Ollama within FME to input data, create custom models, and enhance security protocols. This segment will include demos to illustrate the full capabilities of FME in AI-driven processes.
Custom AI Models: Discover how to leverage FME to build personalized AI models using your data. Whether it’s populating a model with local data for added security or integrating public AI tools, find out how FME facilitates a versatile and secure approach to AI.
We’ll wrap up with a live Q&A session where you can engage with our experts on your specific use cases, and learn more about optimizing your data workflows with AI.
This webinar is ideal for professionals seeking to harness the power of AI within their data management systems while ensuring high levels of customization and security. Whether you're a novice or an expert, gain actionable insights and strategies to elevate your data processes. Join us to see how FME and AI can revolutionize how you work with data!
Your One-Stop Shop for Python Success: Top 10 US Python Development Providersakankshawande
Simplify your search for a reliable Python development partner! This list presents the top 10 trusted US providers offering comprehensive Python development services, ensuring your project's success from conception to completion.
Taking AI to the Next Level in Manufacturing.pdfssuserfac0301
Read Taking AI to the Next Level in Manufacturing to gain insights on AI adoption in the manufacturing industry, such as:
1. How quickly AI is being implemented in manufacturing.
2. Which barriers stand in the way of AI adoption.
3. How data quality and governance form the backbone of AI.
4. Organizational processes and structures that may inhibit effective AI adoption.
6. Ideas and approaches to help build your organization's AI strategy.
GraphRAG for Life Science to increase LLM accuracyTomaz Bratanic
GraphRAG for life science domain, where you retriever information from biomedical knowledge graphs using LLMs to increase the accuracy and performance of generated answers
Generating privacy-protected synthetic data using Secludy and MilvusZilliz
During this demo, the founders of Secludy will demonstrate how their system utilizes Milvus to store and manipulate embeddings for generating privacy-protected synthetic data. Their approach not only maintains the confidentiality of the original data but also enhances the utility and scalability of LLMs under privacy constraints. Attendees, including machine learning engineers, data scientists, and data managers, will witness first-hand how Secludy's integration with Milvus empowers organizations to harness the power of LLMs securely and efficiently.
HCL Notes and Domino License Cost Reduction in the World of DLAUpanagenda
Webinar Recording: https://www.panagenda.com/webinars/hcl-notes-and-domino-license-cost-reduction-in-the-world-of-dlau/
The introduction of DLAU and the CCB & CCX licensing model caused quite a stir in the HCL community. As a Notes and Domino customer, you may have faced challenges with unexpected user counts and license costs. You probably have questions on how this new licensing approach works and how to benefit from it. Most importantly, you likely have budget constraints and want to save money where possible. Don’t worry, we can help with all of this!
We’ll show you how to fix common misconfigurations that cause higher-than-expected user counts, and how to identify accounts which you can deactivate to save money. There are also frequent patterns that can cause unnecessary cost, like using a person document instead of a mail-in for shared mailboxes. We’ll provide examples and solutions for those as well. And naturally we’ll explain the new licensing model.
Join HCL Ambassador Marc Thomas in this webinar with a special guest appearance from Franz Walder. It will give you the tools and know-how to stay on top of what is going on with Domino licensing. You will be able lower your cost through an optimized configuration and keep it low going forward.
These topics will be covered
- Reducing license cost by finding and fixing misconfigurations and superfluous accounts
- How do CCB and CCX licenses really work?
- Understanding the DLAU tool and how to best utilize it
- Tips for common problem areas, like team mailboxes, functional/test users, etc
- Practical examples and best practices to implement right away
In the rapidly evolving landscape of technologies, XML continues to play a vital role in structuring, storing, and transporting data across diverse systems. The recent advancements in artificial intelligence (AI) present new methodologies for enhancing XML development workflows, introducing efficiency, automation, and intelligent capabilities. This presentation will outline the scope and perspective of utilizing AI in XML development. The potential benefits and the possible pitfalls will be highlighted, providing a balanced view of the subject.
We will explore the capabilities of AI in understanding XML markup languages and autonomously creating structured XML content. Additionally, we will examine the capacity of AI to enrich plain text with appropriate XML markup. Practical examples and methodological guidelines will be provided to elucidate how AI can be effectively prompted to interpret and generate accurate XML markup.
Further emphasis will be placed on the role of AI in developing XSLT, or schemas such as XSD and Schematron. We will address the techniques and strategies adopted to create prompts for generating code, explaining code, or refactoring the code, and the results achieved.
The discussion will extend to how AI can be used to transform XML content. In particular, the focus will be on the use of AI XPath extension functions in XSLT, Schematron, Schematron Quick Fixes, or for XML content refactoring.
The presentation aims to deliver a comprehensive overview of AI usage in XML development, providing attendees with the necessary knowledge to make informed decisions. Whether you’re at the early stages of adopting AI or considering integrating it in advanced XML development, this presentation will cover all levels of expertise.
By highlighting the potential advantages and challenges of integrating AI with XML development tools and languages, the presentation seeks to inspire thoughtful conversation around the future of XML development. We’ll not only delve into the technical aspects of AI-powered XML development but also discuss practical implications and possible future directions.
Skybuffer SAM4U tool for SAP license adoptionTatiana Kojar
Manage and optimize your license adoption and consumption with SAM4U, an SAP free customer software asset management tool.
SAM4U, an SAP complimentary software asset management tool for customers, delivers a detailed and well-structured overview of license inventory and usage with a user-friendly interface. We offer a hosted, cost-effective, and performance-optimized SAM4U setup in the Skybuffer Cloud environment. You retain ownership of the system and data, while we manage the ABAP 7.58 infrastructure, ensuring fixed Total Cost of Ownership (TCO) and exceptional services through the SAP Fiori interface.
5th LF Energy Power Grid Model Meet-up SlidesDanBrown980551
5th Power Grid Model Meet-up
It is with great pleasure that we extend to you an invitation to the 5th Power Grid Model Meet-up, scheduled for 6th June 2024. This event will adopt a hybrid format, allowing participants to join us either through an online Mircosoft Teams session or in person at TU/e located at Den Dolech 2, Eindhoven, Netherlands. The meet-up will be hosted by Eindhoven University of Technology (TU/e), a research university specializing in engineering science & technology.
Power Grid Model
The global energy transition is placing new and unprecedented demands on Distribution System Operators (DSOs). Alongside upgrades to grid capacity, processes such as digitization, capacity optimization, and congestion management are becoming vital for delivering reliable services.
Power Grid Model is an open source project from Linux Foundation Energy and provides a calculation engine that is increasingly essential for DSOs. It offers a standards-based foundation enabling real-time power systems analysis, simulations of electrical power grids, and sophisticated what-if analysis. In addition, it enables in-depth studies and analysis of the electrical power grid’s behavior and performance. This comprehensive model incorporates essential factors such as power generation capacity, electrical losses, voltage levels, power flows, and system stability.
Power Grid Model is currently being applied in a wide variety of use cases, including grid planning, expansion, reliability, and congestion studies. It can also help in analyzing the impact of renewable energy integration, assessing the effects of disturbances or faults, and developing strategies for grid control and optimization.
What to expect
For the upcoming meetup we are organizing, we have an exciting lineup of activities planned:
-Insightful presentations covering two practical applications of the Power Grid Model.
-An update on the latest advancements in Power Grid -Model technology during the first and second quarters of 2024.
-An interactive brainstorming session to discuss and propose new feature requests.
-An opportunity to connect with fellow Power Grid Model enthusiasts and users.
A Comprehensive Guide to DeFi Development Services in 2024Intelisync
DeFi represents a paradigm shift in the financial industry. Instead of relying on traditional, centralized institutions like banks, DeFi leverages blockchain technology to create a decentralized network of financial services. This means that financial transactions can occur directly between parties, without intermediaries, using smart contracts on platforms like Ethereum.
In 2024, we are witnessing an explosion of new DeFi projects and protocols, each pushing the boundaries of what’s possible in finance.
In summary, DeFi in 2024 is not just a trend; it’s a revolution that democratizes finance, enhances security and transparency, and fosters continuous innovation. As we proceed through this presentation, we'll explore the various components and services of DeFi in detail, shedding light on how they are transforming the financial landscape.
At Intelisync, we specialize in providing comprehensive DeFi development services tailored to meet the unique needs of our clients. From smart contract development to dApp creation and security audits, we ensure that your DeFi project is built with innovation, security, and scalability in mind. Trust Intelisync to guide you through the intricate landscape of decentralized finance and unlock the full potential of blockchain technology.
Ready to take your DeFi project to the next level? Partner with Intelisync for expert DeFi development services today!
HCL Notes und Domino Lizenzkostenreduzierung in der Welt von DLAUpanagenda
Webinar Recording: https://www.panagenda.com/webinars/hcl-notes-und-domino-lizenzkostenreduzierung-in-der-welt-von-dlau/
DLAU und die Lizenzen nach dem CCB- und CCX-Modell sind für viele in der HCL-Community seit letztem Jahr ein heißes Thema. Als Notes- oder Domino-Kunde haben Sie vielleicht mit unerwartet hohen Benutzerzahlen und Lizenzgebühren zu kämpfen. Sie fragen sich vielleicht, wie diese neue Art der Lizenzierung funktioniert und welchen Nutzen sie Ihnen bringt. Vor allem wollen Sie sicherlich Ihr Budget einhalten und Kosten sparen, wo immer möglich. Das verstehen wir und wir möchten Ihnen dabei helfen!
Wir erklären Ihnen, wie Sie häufige Konfigurationsprobleme lösen können, die dazu führen können, dass mehr Benutzer gezählt werden als nötig, und wie Sie überflüssige oder ungenutzte Konten identifizieren und entfernen können, um Geld zu sparen. Es gibt auch einige Ansätze, die zu unnötigen Ausgaben führen können, z. B. wenn ein Personendokument anstelle eines Mail-Ins für geteilte Mailboxen verwendet wird. Wir zeigen Ihnen solche Fälle und deren Lösungen. Und natürlich erklären wir Ihnen das neue Lizenzmodell.
Nehmen Sie an diesem Webinar teil, bei dem HCL-Ambassador Marc Thomas und Gastredner Franz Walder Ihnen diese neue Welt näherbringen. Es vermittelt Ihnen die Tools und das Know-how, um den Überblick zu bewahren. Sie werden in der Lage sein, Ihre Kosten durch eine optimierte Domino-Konfiguration zu reduzieren und auch in Zukunft gering zu halten.
Diese Themen werden behandelt
- Reduzierung der Lizenzkosten durch Auffinden und Beheben von Fehlkonfigurationen und überflüssigen Konten
- Wie funktionieren CCB- und CCX-Lizenzen wirklich?
- Verstehen des DLAU-Tools und wie man es am besten nutzt
- Tipps für häufige Problembereiche, wie z. B. Team-Postfächer, Funktions-/Testbenutzer usw.
- Praxisbeispiele und Best Practices zum sofortigen Umsetzen
Salesforce Integration for Bonterra Impact Management (fka Social Solutions A...Jeffrey Haguewood
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on integration of Salesforce with Bonterra Impact Management.
Interested in deploying an integration with Salesforce for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.