Hybrid frequency modulation for pwm-integrated resonant converters
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This paper presents a unique hybrid-frequency modulation method for extending the input range of PWM-integrated resonant converters while maintaining high conversion efficiency. The modulation scheme reduces core and conduction losses by decreasing applied volt-seconds at the transformer and improving switching period utilization. It also maintains zero current switching, minimizes switching loss, and eliminates circulating energy across the entire operating range. Experimental results from a 180W prototype show over a 4% weighted efficiency improvement using this proposed method.
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International Journal of Engineering Research and Applications (IJERA) aims to cover the latest outstanding developments in the field of all Engineering Technologies & science.
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pulse converter which in turn simplifies the operation of the SAPF. The
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International Refereed Journal of Engineering and Science (IRJES)
International Refereed Journal of Engineering and Science (IRJES)
Performance of the dpfc before and during series converter failure
Performance of the dpfc before and during series converter failure
A Fuzzy Logic controller based Multifunctional Dynamic Voltage restorer in Di...
A Fuzzy Logic controller based Multifunctional Dynamic Voltage restorer in Di...
Voltage Sag and Harmonics Mitigation using Distributed Power Flow Controller
Voltage Sag and Harmonics Mitigation using Distributed Power Flow Controller
Speed control of DC motor using pulse width modulation technique
Speed control of DC motor using pulse width modulation technique
A Shunt Active Power Filter for 12 Pulse Converter Using Source Current Detec...
A Shunt Active Power Filter for 12 Pulse Converter Using Source Current Detec...
IRJET- SVPWM Technique based D-STATCOM to Improve Power Quality in Distributi...
IRJET- SVPWM Technique based D-STATCOM to Improve Power Quality in Distributi...
Multi Pulse Rectifier Using Different Phase Shifting Transformers and its THD...
Multi Pulse Rectifier Using Different Phase Shifting Transformers and its THD...
H6 Transformer less Topology and Its Modulation Strategy for Mitigating Cm Cu...
H6 Transformer less Topology and Its Modulation Strategy for Mitigating Cm Cu...
[7] a generalized parameter tuning method of proportional resonant controller...
[7] a generalized parameter tuning method of proportional resonant controller...
International Journal of Engineering Research and Development (IJERD)
International Journal of Engineering Research and Development (IJERD)
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SAMSTAR: A Semi-automated Lexical Method to generate Star Schemas from an ERD
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Similar to Hybrid frequency modulation for pwm-integrated resonant converters
High Step-Up High-Efficiency Interleaved Converter With Voltage Multiplier Mo...
High Step-Up High-Efficiency Interleaved Converter With Voltage Multiplier Mo...best buddha e smart technologies
This document summarizes a research paper that proposes a novel high step-up converter suitable for renewable energy systems. The converter uses an interleaved boost converter combined with a voltage multiplier module composed of switched capacitors and coupled inductors to achieve high step-up gain without extreme duty ratios. This configuration reduces current stress and input current ripple. It also recycles leakage energy to improve efficiency and reduce voltage spikes across switches. Experimental results with a 40V input and 380V 1000W output showed an highest efficiency of 97.1%, confirming the converter's suitability for high power renewable applications requiring high step-up conversion.High step up interleaved forward-flyback boost converter with three-winding c...
The document proposes a novel high step-up interleaved forward-flyback boost converter that uses three-winding coupled inductors to achieve high voltage conversion with high efficiency. It reduces current stress and input current ripple, decreasing losses and increasing component lifetime. Energy from leakage is recycled to the output through passive clamping, alleviating voltage spikes on switches and improving efficiency while maintaining low voltage stresses on components lower than the output voltage. A prototype with 48V input, 380V 2kW output achieved 96.5% maximum and 92.6% full-load efficiency.
Interleaved boundary conduction mode (bcm) buck power factor correction (pfc)...
This document proposes an interleaved boundary conduction mode power factor correction buck converter that maintains high efficiency across all load and line conditions. It uses an adaptive master-slave interleaving method to keep the two parallel buck converters 180 degrees out of phase during transients. This halves the input current ripple while doubling the ripple frequency, allowing for a smaller line filter. Experimental results from a 300W prototype with 80V output show efficiencies above 96% down to 20% load and above 94% even at 10% load, across the full universal line range. The input current harmonics also meet IEC61000-3-2 class D standards.
Interleaved boundary conduction mode (bcm) buck power factor correction (pfc)...
This document proposes an interleaved boundary conduction mode power factor correction buck converter that maintains high efficiency across all load and line conditions. It uses an adaptive master-slave interleaving method to keep the two parallel buck converters 180 degrees out of phase during transients. This halves the input current ripple while doubling the ripple frequency, allowing for a smaller line filter. Experimental results from a 300W prototype with 80V output show efficiencies above 96% down to 20% load and above 94% even at 10% load, across the full universal line range. The input current harmonics also meet IEC61000-3-2 class D standards.
Interleaved boundary conduction mode (bcm) buck power factor correction (pfc)...
This document proposes an interleaved boundary conduction mode power factor correction buck converter that maintains high efficiency across all load and line conditions. It uses an adaptive master-slave interleaving method to keep the two parallel buck converters 180 degrees out of phase during transients. Interleaving halves the input current ripple and doubles the ripple frequency, allowing for a smaller line filter. Experimental results from a 300W prototype with 80V output show efficiencies above 96% down to 20% load and above 94% even at 10% load, across the full universal line range. The input current harmonics also meet IEC61000-3-2 class D standards.
High step up interleaved forward-flyback boost converter with three-winding c...
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A320108
International Advance Journal of Engineering Research (IAJER) is a double blind peer reviewed, open access journal published by (IAJER).
Regeneration in Variable Frequency Drives and Energy Saving Methods
This document discusses methods for regenerating energy from variable frequency drives to save costs. When an induction motor decelerates, it generates electricity that is normally wasted as heat through braking resistors. Regenerative converters can return this energy to the grid instead. Three types are described: regenerative converters use PWM to feed energy back through the supply line; sinusoidal PWM converters regulate voltage while improving power quality; and matrix converters directly convert AC to AC with minimal components. Matrix converters integrate regeneration and driving but have limited voltage transfer. Regenerative converters provide significant utility cost savings, especially for applications with frequent braking like cranes or elevators.
Study of Different Types of Inverters and FFT Analysis of Output of SPWM Inve...
This paper briefly discusses various types of inverters
and the output waveforms of square wave inverter and SPWM
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The document describes a new high-efficiency resonant DC/DC converter topology called the Resistance Compression Network (RCN) converter. It operates with simultaneous zero-voltage switching and near zero-current switching across a wide range of input voltages, output voltages, and power levels, resulting in low switching losses. Experimental results from a 200W prototype show over 95% efficiency is maintained across an input voltage range of 25V to 40V with an output voltage of 400V, and it operates efficiently over a wide output voltage and power range. The RCN converter uses a resistance compression network and on/off control to maintain desired current waveforms and high efficiency over varying operating conditions.
IRJET- Modified Cascaded H - Bridge Multilevel Inverter for Household Appliances
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Pulse Density Modulation Based Series Resonant Inverter Fed Induction Heater ...
Pulse Density Modulation Based Series Resonant Inverter Fed Induction Heater ...International Journal of Power Electronics and Drive Systems
This paper deals with implementation of a multi-output Series Resonant Inverter(SRI) for induction heating applications, which uses pulse density modulation(PDM) control for full bridge Series resonant inverters for output voltage and power control. It ensures better efficiency performances than conventional control strategies. The proposed converter can be considered as a two output extension of a full bridge inverter. This full bridge inverter can control the two outputs, simultaneously and independently, up to their rated powers, which reduces the usage of number of components as compared with conventional method. It also ensures higher utilization of switches used for its operation. A two output full bridge series resonant inverter is simulated and implemented. The Experimental results are compared with the simulation results.Soft switching dc-dc converter with a full zvs range and reduced output filte...
The document proposes a new soft-switching DC-DC converter that can achieve zero-voltage switching over the full range and reduce the size of the output filter for high-voltage applications. The converter uses two half-bridge inverters in parallel on the primary side driven with a phase shift to regulate the output voltage. Two full-bridge rectifiers share two low-current diodes at the rectifier stage. This allows the converter to have full zero-voltage switching range, no circulating current, no duty cycle loss, and a significantly reduced output filter. Experimental results from a prototype validated the theoretical analysis.
Soft switching dc-dc converter with a full zvs range and reduced output filte...
The document proposes a new soft-switching DC-DC converter that can achieve zero-voltage switching over the full range and reduce the size of the output filter for high-voltage applications. The converter uses two half-bridge inverters in parallel on the primary side driven with a phase shift to regulate the output voltage. Two full-bridge rectifiers share two low-current diodes at the rectifier stage. This allows the converter to have full zero-voltage switching range, no circulating current, no duty cycle loss, and a significantly reduced output filter. Experimental results from a prototype validated the theoretical analysis.
IRJET- Harmonics Reduction using Harmonics Injection Method
This document discusses a current harmonic injection technique to reduce harmonics from induction motor drives used in variable frequency drives (VFDs). VFDs generate harmonics that can cause motor heating, electromagnetic interference, and instrument malfunctions. The technique injects specific harmonics from an inverter circuit into the VFD output to cancel out current harmonics and reduce total harmonic distortion. It uses three bi-directional switches in the injection circuit instead of a traditional zigzag transformer to lower costs and size. Simulation results showed the technique reduced harmonics with a minimal increase in diode power ratings.
Ap35235240
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.
Grid Connected Wind Turbine Generator with Real and Reactive Power Control
This document proposes a grid-connected wind turbine system with a permanent magnet synchronous generator (PMSG) for variable speed operation. A diode bridge rectifier converts the AC voltage from the PMSG to DC, which is fed to a boost converter for voltage regulation. The output of the boost converter feeds a three-phase inverter to inject real and reactive power into the grid using PI controllers with grid current and voltage feedback. Maximum power point tracking (MPPT) is achieved by varying the turbine pitch angle using a voltage-controlled technique to extract maximum power for varying wind speeds. Simulation results in MATLAB/Simulink demonstrate the performance of the system.
Application of AGPU for Matrix Converters
A simple PI control loop for the matrix converter system is designed in the simulation to maintain a constant output voltage inspite of any disturbance in the source. The single phase matrix converter employs a modified safe- commutation strategy, which results in the elimination of voltage spikes on switches, without the need of a snubber circuit when there is an inductive load being utilized. This is facilitated through the proper switching control algorithm. The sine PWM pulses are generated as switching pulses to the converter to reduce the THD.
IRJET- Comparison of H5 and HERIC Trasformerless Inverter Topology Conserning...
This document compares the H5 and HERIC transformerless inverter topologies used in photovoltaic systems for their leakage current and efficiency. It finds that the HERIC topology has lower conduction losses than the H5 topology due to differences in switching behavior. The HERIC topology also produces less leakage current than the H5. Both topologies require similar sized filters to cancel output harmonics. In conclusion, the HERIC topology performs better in terms of losses and leakage current reduction compared to the H5 topology for photovoltaic inverters.
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High Step-Up High-Efficiency Interleaved Converter With Voltage Multiplier Mo...
High Step-Up High-Efficiency Interleaved Converter With Voltage Multiplier Mo...
High step up interleaved forward-flyback boost converter with three-winding c...
High step up interleaved forward-flyback boost converter with three-winding c...
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Interleaved boundary conduction mode (bcm) buck power factor correction (pfc)...
Interleaved boundary conduction mode (bcm) buck power factor correction (pfc)...
Interleaved boundary conduction mode (bcm) buck power factor correction (pfc)...
Interleaved boundary conduction mode (bcm) buck power factor correction (pfc)...
Interleaved boundary conduction mode (bcm) buck power factor correction (pfc)...
High step up interleaved forward-flyback boost converter with three-winding c...
High step up interleaved forward-flyback boost converter with three-winding c...
Regeneration in Variable Frequency Drives and Energy Saving Methods
Regeneration in Variable Frequency Drives and Energy Saving Methods
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Study of Different Types of Inverters and FFT Analysis of Output of SPWM Inve...
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Closed Loop Analysis of Multilevel Inverter Fed Drives 
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High Efficiency Resonant dc/dc Converter Utilizing a Resistance Compression N...
IRJET- Modified Cascaded H - Bridge Multilevel Inverter for Household Appliances
IRJET- Modified Cascaded H - Bridge Multilevel Inverter for Household Appliances
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Pulse Density Modulation Based Series Resonant Inverter Fed Induction Heater ...
Soft switching dc-dc converter with a full zvs range and reduced output filte...
Soft switching dc-dc converter with a full zvs range and reduced output filte...
Soft switching dc-dc converter with a full zvs range and reduced output filte...
Soft switching dc-dc converter with a full zvs range and reduced output filte...
IRJET- Harmonics Reduction using Harmonics Injection Method
IRJET- Harmonics Reduction using Harmonics Injection Method
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Grid Connected Wind Turbine Generator with Real and Reactive Power Control
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IRJET- Comparison of H5 and HERIC Trasformerless Inverter Topology Conserning...
Hybrid frequency modulation for pwm-integrated resonant converters
- 1. HYBRID-FREQUENCY MODULATION FOR PWM-INTEGRATED RESONANT CONVERTERS ABSTRACT: This paper presents a unique modulation method for extending the input range of pulse-width modulation (PWM)-integrated resonant converters, such as the isolated boost resonant converter, while maintaining high conversion efficiency. The technique includes primarily the hybridizing of constant-on, constant-off, and fixed-frequency control depending only on the required duty cycle. The modulation scheme reduces core loss and conduction loss dramatically by decreasing the applied volt-seconds at the transformer and improving the switching period utilization. With hybrid-frequency control, the circuit also maintains zero current switching for the output diodes, minimizes switching loss, and eliminates circulating energy at the transformer across the entire operating range. It also allows for a predictable voltage gain, dependent only on duty cycle and transformer turns ratio. A detailed loss analysis is provided and verified against a 180 W experimental prototype, with an input range of 12-48 V and a switching frequency range of 30-70 kHz. Implementation issues are also handled with a variety of solutions for realizing the modulation scheme. Experimental results show greater than 4% weighted efficiency improvement in the prototype using the proposed method.