The document describes a proposed quasi-single-stage current-fed resonant AC-DC converter that improves heat distribution. The converter uses a current doubler circuit with an active clamp on the primary side and an active voltage doubler with a bidirectional switch on the secondary side. This configuration allows the secondary switches to turn off with near-zero voltage at high power and half the output voltage at low power, reducing switching losses and improving heat distribution over the switches. The converter also achieves negligible input current ripple by operating the primary switches at a fixed 50% duty cycle. Experimental results from a 1 kW prototype verify the effectiveness of the design.
A Novel High Step-Up DC–DC Converter for Hybrid Renewable Energy System appli...IJERD Editor
Large electric drives and utility applications require advanced power electronics converter to meet
the high power demands. As a result, power converter structure has been introduced as an alternative in high
power and medium voltage situations using Renewable energy sources (RES). This paper describes a new
DC/DC converter with safety, high efficiency and high step up capabilities. This converter is best suited for
Wind/Fuel cell(FC)based Induction Motor applications for pumping systems. The safety feature of this
converter makes it friendly for the farmers to use it for irrigation and agriculture usages. The converter achieves
high step-up voltage gain with appropriate duty ratio and low voltage stress on the power switches. Also, the
energy stored in the leakage inductor of the coupled inductor can be recycled to the output. The maximum
output voltage is determined by the number of the capacitors. The capacitors are charged in parallel and are
discharged in series by the coupled inductor, stacking on the output capacitor. Thus, the proposed converter can
achieve high step-up voltage gain with appropriate duty ratio and interfaced to induction motor through 9-level
inverter and also energy fed to grid system when no load operation. The simulation results are obtained using
MATLAB/SIMULINK software.
Microcontroller Based Novel Dc-to-Ac Grid Connected Inverter TopologyIDES Editor
The conventional line commutated ac-to-dc
converters/ inverters have square-shaped line current which
contains higher-order harmonics. Moreover, it requires a
costly and bulky dc inductor or choke. The line current with
the high harmonic contents generates EMI and therefore it
causes more heating of the core of distribution or power
transformers. Alternatively, PWM based inverters using
MOSFET/IGBT switches can be used for the above purpose.
However, apart from higher switching losses, the power
handling capability and reliability of these devices are quite
low in comparison to thyristors/ SCR. A thyristor based forced
commutated inverters are not suitable for PWM applications
due to the problems of commutation circuits. A pure sinusoidal
voltage output or waveform with low harmonic contents is
most desirable in the conversion from dc to ac. In the present
work, a novel two pulse line commutated inverter is been
proposed with control signal generated from PIC 16F 877A. It
improves the wave shape hence it reduces the total harmonic
distortion (THD) of the grid interactive-inverter. The
simulation of the circuit is done using SIMULINK. Moreover,
the performance of the proposed circuitry is far better than
the conventional line-commutated inverter. It reduces THD,
number of thyristors and dispenses with the bulky dc inductor/
choke. A prototype model is developed for discontinuous line
current mode. The results are also compared with the
simulation results in SIMULINK/ MATLAB.
This paper presents the simulation design of dc/dc interleaved boost converter with zero-voltage switching (ZVS). By employin the interleaved structure, the input current stresses to switching devices were reduced and this signified to a switching conduction loss reduction. All the parameters had been calculated theoretically. The proposed converter circuit was simulated by using MATLAB/Simulink and PSpice software programmes. The converter circuit model, with specifications of output power of 200 W, input voltage range from 10~60 V, and operates at 100 kHz switching frequency was simulated to validate the designed parameters. The results showed that the main switches of the model converter circuit achieved ZVS conditions during the interleaving operation. Consequently, the switching losses in the main switching devices were reduced. Thus, the proposed converter circuit model offers advantages of input current stress and switching loss reductions. Hence, based on the designed parameters and results, the converter model can be extended for hardware implementation.
A Comparative Study of Various AC-DC Converters for Low Voltage Energy Harves...paperpublications3
Abstract: Electromagnetic microscale and mesoscale power generators with low voltage outputs are now widely used as kinetic energy harvesters. The extrinsic vibrations on the generator can excite the internal oscillations between the proof mass magnet and the electrical damper coils. These oscillations produce a periodically varying magnetic flux in coil, inducing a corresponding AC output voltage. This output can be converted to dc and can be used to supply power to electronic loads. The conventional AC-DC converters for energy harvesting system with diode rectifiers suffer considerable voltage drop resulting increase in power loss of circuitry and complexity. As a remedy various bridgeless boost converters were designed and implemented. Standard H bridge converter with 4 switch or 2 switch, dual polarity boost converters, parallel combination of boost and buck-boost converter, integrated boost and buck-boost combination bridgeless rectifier are some of these. These circuits are studied, simulated and compared. The simulation models are drawn and simulated using MATLAB R2010a.
A Novel High Step-Up DC–DC Converter for Hybrid Renewable Energy System appli...IJERD Editor
Large electric drives and utility applications require advanced power electronics converter to meet
the high power demands. As a result, power converter structure has been introduced as an alternative in high
power and medium voltage situations using Renewable energy sources (RES). This paper describes a new
DC/DC converter with safety, high efficiency and high step up capabilities. This converter is best suited for
Wind/Fuel cell(FC)based Induction Motor applications for pumping systems. The safety feature of this
converter makes it friendly for the farmers to use it for irrigation and agriculture usages. The converter achieves
high step-up voltage gain with appropriate duty ratio and low voltage stress on the power switches. Also, the
energy stored in the leakage inductor of the coupled inductor can be recycled to the output. The maximum
output voltage is determined by the number of the capacitors. The capacitors are charged in parallel and are
discharged in series by the coupled inductor, stacking on the output capacitor. Thus, the proposed converter can
achieve high step-up voltage gain with appropriate duty ratio and interfaced to induction motor through 9-level
inverter and also energy fed to grid system when no load operation. The simulation results are obtained using
MATLAB/SIMULINK software.
Microcontroller Based Novel Dc-to-Ac Grid Connected Inverter TopologyIDES Editor
The conventional line commutated ac-to-dc
converters/ inverters have square-shaped line current which
contains higher-order harmonics. Moreover, it requires a
costly and bulky dc inductor or choke. The line current with
the high harmonic contents generates EMI and therefore it
causes more heating of the core of distribution or power
transformers. Alternatively, PWM based inverters using
MOSFET/IGBT switches can be used for the above purpose.
However, apart from higher switching losses, the power
handling capability and reliability of these devices are quite
low in comparison to thyristors/ SCR. A thyristor based forced
commutated inverters are not suitable for PWM applications
due to the problems of commutation circuits. A pure sinusoidal
voltage output or waveform with low harmonic contents is
most desirable in the conversion from dc to ac. In the present
work, a novel two pulse line commutated inverter is been
proposed with control signal generated from PIC 16F 877A. It
improves the wave shape hence it reduces the total harmonic
distortion (THD) of the grid interactive-inverter. The
simulation of the circuit is done using SIMULINK. Moreover,
the performance of the proposed circuitry is far better than
the conventional line-commutated inverter. It reduces THD,
number of thyristors and dispenses with the bulky dc inductor/
choke. A prototype model is developed for discontinuous line
current mode. The results are also compared with the
simulation results in SIMULINK/ MATLAB.
This paper presents the simulation design of dc/dc interleaved boost converter with zero-voltage switching (ZVS). By employin the interleaved structure, the input current stresses to switching devices were reduced and this signified to a switching conduction loss reduction. All the parameters had been calculated theoretically. The proposed converter circuit was simulated by using MATLAB/Simulink and PSpice software programmes. The converter circuit model, with specifications of output power of 200 W, input voltage range from 10~60 V, and operates at 100 kHz switching frequency was simulated to validate the designed parameters. The results showed that the main switches of the model converter circuit achieved ZVS conditions during the interleaving operation. Consequently, the switching losses in the main switching devices were reduced. Thus, the proposed converter circuit model offers advantages of input current stress and switching loss reductions. Hence, based on the designed parameters and results, the converter model can be extended for hardware implementation.
A Comparative Study of Various AC-DC Converters for Low Voltage Energy Harves...paperpublications3
Abstract: Electromagnetic microscale and mesoscale power generators with low voltage outputs are now widely used as kinetic energy harvesters. The extrinsic vibrations on the generator can excite the internal oscillations between the proof mass magnet and the electrical damper coils. These oscillations produce a periodically varying magnetic flux in coil, inducing a corresponding AC output voltage. This output can be converted to dc and can be used to supply power to electronic loads. The conventional AC-DC converters for energy harvesting system with diode rectifiers suffer considerable voltage drop resulting increase in power loss of circuitry and complexity. As a remedy various bridgeless boost converters were designed and implemented. Standard H bridge converter with 4 switch or 2 switch, dual polarity boost converters, parallel combination of boost and buck-boost converter, integrated boost and buck-boost combination bridgeless rectifier are some of these. These circuits are studied, simulated and compared. The simulation models are drawn and simulated using MATLAB R2010a.
This paper proposes a non-isolated soft-switching bidirectional dc/dc converter for interfacing energy storage in DC microgrid. The proposed converter employs a half-bridge boost converter at input port followed by a LCC resonant tank to assist in soft-switching of switches and diodes, and finally a voltage doubler circuit at the output port to enhance the voltage gain by two times. The LCC resonant circuit also adds a suitable voltage gain to the converter. Therefore, overall high voltage gain of the converter is obtained without a transformer or large number of multiplier circuit. For operation in buck mode, the high side voltage is divided by half with capacitive divider to gain higher step-down ratio. The converter is operated at high frequency to obtain low output voltage ripple, reduced magnetics and filters. Zero voltage turn-on is achieved for all switches and zero current turn-on and turn-off is achieved for all diodes in both modes i.e., buck/boost operation. Voltage stress across switches and diode is clamped naturally without external snubber circuit. An experimental prototype has been designed, built and tested in the laboratory to verify the performance of the proposed converter.
Single-Input Double Output High Efficient Boost Dc–Dc ConverterIJMER
The aim of this project is to develop a high-efficiency single-input multiple-output (SIMO) dc–dc converter. The proposed converter can boost the voltage of a low-voltage input power source to a controllable high-voltage dc bus and middle-voltage output terminals. The high-voltage dc bus can take as the main power for a high-voltage dc load or the front terminal of a dc–ac inverter.Moreover, middle-voltage output terminals can supply powers for individual middle-voltage dc loads or for charging auxiliary power sources (e.g., battery modules). In this project, a coupled-inductor based dc–dc converter scheme utilizes only one power switch with the properties of voltage clamping and soft switching, and the corresponding device specifications are adequately designed. As a result, the objectives of high-efficiency power conversion, high step up ratio, and various output voltages with different levels can be obtained
A DC-DC converter topology is presented
combining the soft switching effects of the Snubber Assisted Zero
Voltage and Zero Current Transition (SAZZ) topology and the
increased inductor frequency of the dual interleaved boost
converter with interphase transformer. The snubber capacitors
and output capacitances of the main devices are discharged prior
to turn on using a single auxiliary inductor, eliminating turn on
losses. Furthermore, the turn off losses are significantly reduced
since the energy stored in the device output capacitance at turn
off is recovered at turn on. The effectiveness of the topology is
demonstrated on a SiC prototype operating at 12.5 kW, 112 kHz,
reducing the switching losses by 50%.
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.
Low Current Ripple, High Efficiency Boost Converter with Voltage MultiplierIJMTST Journal
An innovative high voltage-gain boost converter, which is made for home inverters contains the combination
of switched capacitors and coupled inductors made a voltage multiplier, which is used to increase the output
gain of a traditional converter abnormally without using an excessive switching frequency. The setup not only
maximizes the efficiency but also eliminates input current ripple almost, which deduces conduction losses
and current stress of switches causes to greater extension of input source lifetime. In addition, due to the
lossless passive clamp performance, leakage energy is recycled to the output terminal. Hence, large voltage
spikes across the main switches are alleviated, and the efficiency is improved. Even the low voltage stress
makes the low-voltage-rated MOSFETs be embraced for reductions conduction losses and expense.
Ultimately, the prototype circuit with 24-V input voltage, 230-V output, and 1000-W output power is operated
to verify its performance. The greatest effectiveness is 97.1 %.
International Journal of Engineering Research and Applications (IJERA) aims to cover the latest outstanding developments in the field of all Engineering Technologies & science.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
An Efficient High Gain DC-DC Converter for Automotive ApplicationsIJPEDS-IAES
This paper presents a high gain DC-DC converter which uses a clamp circuit
to achieve soft switching. The proposed converter is designed to supply a
high intensity discharge (HID) lamp used in automobile head lamps. The
converter operates from a 12V input supply and provides an output voltage
of 120V at 35W output power. A clamp circuit consisting of a clamp
capacitor, clamp switch and resonant inductor will help to achieve zero
voltage switching (ZVS) of the both main and clamp switches. The practical
performance of the converter was validated through experimental results.
Results obtained from the prototype hardware prove that the converter meets
the requirements of HID lamp application and can be a very good alternative
to existing converters.
Coupled Inductor Based High Step-Up DC-DC Converter for Multi Input PV SystemIJERA Editor
With the shortage of the energy and ever increasing of the oil price, research on the renewable and green energy
sources, especially the solar arrays and the fuel cells, becomes more and more important. How to achieve high
step-up and high efficiency DC/DC converters is the major consideration in the renewable power applications
due to the low voltage of PV arrays and fuel cells. In this paper a coupled inductor dc-dc converter for photovoltaic
system is proposed. The circuit configuration of the proposed converter is very simple. Thus, the
proposed converter has higher step-up and step-down voltage gains than the conventional bidirectional dc–dc
boost/buck converter. Under same electric specifications for the proposed converter and the conventional
bidirectional boost/buck converter, the average value of the switch current in the proposed converter is less than
the conventional bidirectional boost/buck converter. The operating principles have been applied to multi input
photovoltaic system and outputs have been observed.
The International Journal of Engineering and Science (The IJES)theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
Design and implementation of Closed Loop Control of Three Phase Interleaved P...IJMTST Journal
A single-phase, three-level, single-stage power-factor corrected AC/DC converter operated under closed
loop manner is presented. That operates with a single controller to regulate the output voltage and the input
inductor act as a boost inductor to have a single stage power factor correction with good output response. The
paper deals with a new single stage three level ac-dc converter which performs both power factor correction
and voltage regulation in a single stage. The proposed converter has two separate controllers, one for power
factor correction and the other for regulating the output voltage. A comprehensive review of the existing single
stage topologies has been carried out. Then the operating principle, control scheme and the design of the new
converter are presented. The proposed converter is having an input power factor close to unity and better
voltage regulation compared to the conventional ac-dc converter topologies. Proposed topology is evaluated
through Matlab/Simulink platform and simulation results are conferred.
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.
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
Modeling and Analysis of Transformerless High Gain Buck-boost DC-DC ConvertersIAES-IJPEDS
This paper proposes a transfomerless switched capacitor buck boost converter model, which provides higher voltage gain and higher efficiency when compared to the conventional buck boost converter. The averaged model based on state- space description is analyzed in the paper. The simulation results are presented to confirm the capability of the converter to generate high voltage ratios. The comparison between the proposed model and the traditional model is also provided to reveal the improvement. The proposed converter is suitable for for a wide application which requires high step-up DC-DC converters such as DC micro-grids and solar electrical energy.
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.
This paper proposes a non-isolated soft-switching bidirectional dc/dc converter for interfacing energy storage in DC microgrid. The proposed converter employs a half-bridge boost converter at input port followed by a LCC resonant tank to assist in soft-switching of switches and diodes, and finally a voltage doubler circuit at the output port to enhance the voltage gain by two times. The LCC resonant circuit also adds a suitable voltage gain to the converter. Therefore, overall high voltage gain of the converter is obtained without a transformer or large number of multiplier circuit. For operation in buck mode, the high side voltage is divided by half with capacitive divider to gain higher step-down ratio. The converter is operated at high frequency to obtain low output voltage ripple, reduced magnetics and filters. Zero voltage turn-on is achieved for all switches and zero current turn-on and turn-off is achieved for all diodes in both modes i.e., buck/boost operation. Voltage stress across switches and diode is clamped naturally without external snubber circuit. An experimental prototype has been designed, built and tested in the laboratory to verify the performance of the proposed converter.
Single-Input Double Output High Efficient Boost Dc–Dc ConverterIJMER
The aim of this project is to develop a high-efficiency single-input multiple-output (SIMO) dc–dc converter. The proposed converter can boost the voltage of a low-voltage input power source to a controllable high-voltage dc bus and middle-voltage output terminals. The high-voltage dc bus can take as the main power for a high-voltage dc load or the front terminal of a dc–ac inverter.Moreover, middle-voltage output terminals can supply powers for individual middle-voltage dc loads or for charging auxiliary power sources (e.g., battery modules). In this project, a coupled-inductor based dc–dc converter scheme utilizes only one power switch with the properties of voltage clamping and soft switching, and the corresponding device specifications are adequately designed. As a result, the objectives of high-efficiency power conversion, high step up ratio, and various output voltages with different levels can be obtained
A DC-DC converter topology is presented
combining the soft switching effects of the Snubber Assisted Zero
Voltage and Zero Current Transition (SAZZ) topology and the
increased inductor frequency of the dual interleaved boost
converter with interphase transformer. The snubber capacitors
and output capacitances of the main devices are discharged prior
to turn on using a single auxiliary inductor, eliminating turn on
losses. Furthermore, the turn off losses are significantly reduced
since the energy stored in the device output capacitance at turn
off is recovered at turn on. The effectiveness of the topology is
demonstrated on a SiC prototype operating at 12.5 kW, 112 kHz,
reducing the switching losses by 50%.
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.
Low Current Ripple, High Efficiency Boost Converter with Voltage MultiplierIJMTST Journal
An innovative high voltage-gain boost converter, which is made for home inverters contains the combination
of switched capacitors and coupled inductors made a voltage multiplier, which is used to increase the output
gain of a traditional converter abnormally without using an excessive switching frequency. The setup not only
maximizes the efficiency but also eliminates input current ripple almost, which deduces conduction losses
and current stress of switches causes to greater extension of input source lifetime. In addition, due to the
lossless passive clamp performance, leakage energy is recycled to the output terminal. Hence, large voltage
spikes across the main switches are alleviated, and the efficiency is improved. Even the low voltage stress
makes the low-voltage-rated MOSFETs be embraced for reductions conduction losses and expense.
Ultimately, the prototype circuit with 24-V input voltage, 230-V output, and 1000-W output power is operated
to verify its performance. The greatest effectiveness is 97.1 %.
International Journal of Engineering Research and Applications (IJERA) aims to cover the latest outstanding developments in the field of all Engineering Technologies & science.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
An Efficient High Gain DC-DC Converter for Automotive ApplicationsIJPEDS-IAES
This paper presents a high gain DC-DC converter which uses a clamp circuit
to achieve soft switching. The proposed converter is designed to supply a
high intensity discharge (HID) lamp used in automobile head lamps. The
converter operates from a 12V input supply and provides an output voltage
of 120V at 35W output power. A clamp circuit consisting of a clamp
capacitor, clamp switch and resonant inductor will help to achieve zero
voltage switching (ZVS) of the both main and clamp switches. The practical
performance of the converter was validated through experimental results.
Results obtained from the prototype hardware prove that the converter meets
the requirements of HID lamp application and can be a very good alternative
to existing converters.
Coupled Inductor Based High Step-Up DC-DC Converter for Multi Input PV SystemIJERA Editor
With the shortage of the energy and ever increasing of the oil price, research on the renewable and green energy
sources, especially the solar arrays and the fuel cells, becomes more and more important. How to achieve high
step-up and high efficiency DC/DC converters is the major consideration in the renewable power applications
due to the low voltage of PV arrays and fuel cells. In this paper a coupled inductor dc-dc converter for photovoltaic
system is proposed. The circuit configuration of the proposed converter is very simple. Thus, the
proposed converter has higher step-up and step-down voltage gains than the conventional bidirectional dc–dc
boost/buck converter. Under same electric specifications for the proposed converter and the conventional
bidirectional boost/buck converter, the average value of the switch current in the proposed converter is less than
the conventional bidirectional boost/buck converter. The operating principles have been applied to multi input
photovoltaic system and outputs have been observed.
The International Journal of Engineering and Science (The IJES)theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
Design and implementation of Closed Loop Control of Three Phase Interleaved P...IJMTST Journal
A single-phase, three-level, single-stage power-factor corrected AC/DC converter operated under closed
loop manner is presented. That operates with a single controller to regulate the output voltage and the input
inductor act as a boost inductor to have a single stage power factor correction with good output response. The
paper deals with a new single stage three level ac-dc converter which performs both power factor correction
and voltage regulation in a single stage. The proposed converter has two separate controllers, one for power
factor correction and the other for regulating the output voltage. A comprehensive review of the existing single
stage topologies has been carried out. Then the operating principle, control scheme and the design of the new
converter are presented. The proposed converter is having an input power factor close to unity and better
voltage regulation compared to the conventional ac-dc converter topologies. Proposed topology is evaluated
through Matlab/Simulink platform and simulation results are conferred.
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.
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
Modeling and Analysis of Transformerless High Gain Buck-boost DC-DC ConvertersIAES-IJPEDS
This paper proposes a transfomerless switched capacitor buck boost converter model, which provides higher voltage gain and higher efficiency when compared to the conventional buck boost converter. The averaged model based on state- space description is analyzed in the paper. The simulation results are presented to confirm the capability of the converter to generate high voltage ratios. The comparison between the proposed model and the traditional model is also provided to reveal the improvement. The proposed converter is suitable for for a wide application which requires high step-up DC-DC converters such as DC micro-grids and solar electrical energy.
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.
Similar to Quasi-Single-Stage_Current-Fed_Resonant_AC-DC_Converter_Having_Improved_Heat_Distribution.pdf (20)
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
#vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore#blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #blackmagicforlove #blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #Amilbabainuk #amilbabainspain #amilbabaindubai #Amilbabainnorway #amilbabainkrachi #amilbabainlahore #amilbabaingujranwalan #amilbabainislamabad
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
4. IEEE TRANSACTIONS ON POWER ELECTRONICS
Fig. 4. Theoretical waveforms of the proposed ac/dc converter. vgs0j0 : the
gate-source voltage of the j-th switch (j=1,...,6).
iL2 follows a negative slope as
iL1(t) =
vin
L1
, (10)
iL2(t) =
vin − VCc
L2
, (11)
while vin = |vg|. The trajectory at this mode stays at A2
(Fig. 5).
Mode 4 [t3, t4]: At time t3, the switching state of S1 and
S4 has changed from on to off. The current flowing through
Ds2 and Ds3 discharges Cs2 and Cs3. Hence S2 and S3 are
Fig. 5. State-plane trajectory of the proposed ac/dc converter.
turned on with ZVS. The trajectory path is the same as in
Mode 3.
III. STEADY-STATE ANALYSIS
A. Voltage Conversion Ratio
Applying the voltage-second balance law to L1 = L2
during a switching period yields
vinDpTs + (vin − VCc)(1 − Dp)Ts = 0. (12)
Substituting Dp = 0.5 into (12) and rearranging it yield
VCc = 2vin. (13)
To obtain the gain of proposed converter. the ripple of the
resonant capacitor voltage ∆Vcr needs to be calculated first.
The voltage doubler on the secondary side of T operates in
symmetrical way during the steady state, so half of average
current that flows through resonant inductor iLr
during the
interval [t1 − t2] is delivered to the output load. Hence, the
average output current Io can be written as
Io =
2
Ts
Z t2
t1