The Experts below are selected from a list of 12249 Experts worldwide ranked by ideXlab platform
Yenan Chen - One of the best experts on this subject based on the ideXlab platform.
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Zero-Voltage-Switching Single-Phase Full-Bridge Inverter With Active Power Decoupling
IEEE Transactions on Power Electronics, 2021Co-Authors: Min Chen, Yenan ChenAbstract:Single-phase zero-voltage-switching (ZVS) Inverter with wide bandgap devices has higher efficiency and power density. However, the dc-side capacitor of the Inverter will suffer double line frequency ripple and reduces the lifetime of the dc bus capacitor. Active power decoupling (APD) is an effective method to replace the short lifetime electrolytic capacitor with a smaller film capacitor. In order to help achieving the ZVS condition for ZVS Inverter and the additional APD circuit, this article presents a ZVS topology for single-phase Full-Bridge Inverter with APD circuit by adding an auxiliary branch between the dc source and the bridge legs. The auxiliary branch is composed of a clamping capacitor, an auxiliary switch, and a resonant inductor. A ZVS pulsewidth modulation scheme is proposed for a single-phase Inverter with APD. The gate drive pulses are designed to realize the ZVS turn- on for the main switches of both APD circuit and single-phase Full-Bridge Inverter. Circuit operation stages are analyzed and ZVS conditions are given. Finally, the proposed ZVS Inverter with APD circuit is verified on a 1.5-kW Inverter prototype.
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Common-Mode Filter Design for a Transformerless ZVS Full-Bridge Inverter
IEEE Journal of Emerging and Selected Topics in Power Electronics, 2016Co-Authors: Yenan ChenAbstract:The zero voltage switching (ZVS) Full-Bridge Inverter can achieve high efficiency using ZVS sinusoidal pulsewidth modulation (ZVS SPWM) and superjunction MOSFET. For further application in a photovoltaic (PV) system, the leakage current problem of a ZVS Full-Bridge Inverter is investigated. First, the common-mode model of the ZVS Full-Bridge Inverter is presented. The common-mode voltage with the ZVS SPWM is found changing with high frequency and leakage current with such frequency is generated. In order to suppress the leakage current below safety standards, the common-mode filter composed of common-mode inductor and bypass capacitor is applied. The impedance of the common-mode path is analyzed, and the parameters of a common-mode filter are designed based on the common-mode model. With a small common-mode inductor and bypass capacitors, the leakage current of the ZVS Full-Bridge Inverter is remarkably reduced, and the method is verified by the experiment.
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Snubber capacitors optimization for super-junction MOSFET in the ZVS Full-Bridge Inverter
2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016Co-Authors: Yenan Chen, Guangyuan LiuAbstract:A zero-voltage switching (ZVS) Full-Bridge Inverter and its modulation schemes have been investigated in previous literatures. Parallel snubber capacitors are utilized to reduce the turn-off loss of super-junction MOSFETs in the ZVS Full-Bridge Inverter. However due to the MOSFET's nonlinear output capacitance together with the parallel snubber capacitor, the ZVS commutation is unable to be realized and high voltage spike occurs on switching devices under light load condition. The problem is solved by changing the position of the snubber capacitors to reduce the turn-off rising time of drain-source voltage. The validity of snubber capacitors optimization is verified by experiments on a ZVS Full-Bridge Inverter prototype.
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A ZVS Grid-Connected Full-Bridge Inverter With a Novel ZVS SPWM Scheme
IEEE Transactions on Power Electronics, 2016Co-Authors: Yenan Chen, Min ChenAbstract:A zero-voltage switching (ZVS) grid-connected Full-Bridge Inverter and its modulation schemes are investigated. A novel sinusoidal pulse width modulation scheme for the ZVS Full-Bridge Inverter (ZVS SPWM) is proposed in this paper. The ZVS SPWM is evolved from the double-frequency SPWM by adding gate drive to the auxiliary switch. The ZVS condition is analyzed and the circulation loss of the resonant branch is optimized by adjusting the energy storage in the resonant inductor. The reverse recovery of the body-diode of MOSFET is relieved and ZVS is realized for both main and auxiliary switches. The filter inductors are significantly reduced with higher switching frequency. The design guideline of resonant parameters and the implementation of ZVS SPWM in DSP controller are introduced. The ZVS SPWM scheme is verified on a 3-kW Inverter prototype. According to the experimental result, peak efficiency as 98.8% is achieved.
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Leakage current suppression for transformerless ZVS Full-Bridge Inverter
2014 International Power Electronics and Application Conference and Exposition, 2014Co-Authors: Yenan Chen, Jiangbei Xi, Dehong XuAbstract:Leakage current suppression for a transformerless zero voltage switching (ZVS) Full-Bridge Inverter is investigated. The leakage current model and the common mode voltage of the ZVS Full-Bridge Inverter are analyzed. The leakage current flowing through the parasitic capacitor between PV panels and the ground is reduced by a common mode inductor and the bypass capacitors. The theoretical analysis of proposed method is presented. Finally the leakage current suppression is verified by simulation and experiment.
Min Chen - One of the best experts on this subject based on the ideXlab platform.
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Zero-Voltage-Switching Single-Phase Full-Bridge Inverter With Active Power Decoupling
IEEE Transactions on Power Electronics, 2021Co-Authors: Min Chen, Yenan ChenAbstract:Single-phase zero-voltage-switching (ZVS) Inverter with wide bandgap devices has higher efficiency and power density. However, the dc-side capacitor of the Inverter will suffer double line frequency ripple and reduces the lifetime of the dc bus capacitor. Active power decoupling (APD) is an effective method to replace the short lifetime electrolytic capacitor with a smaller film capacitor. In order to help achieving the ZVS condition for ZVS Inverter and the additional APD circuit, this article presents a ZVS topology for single-phase Full-Bridge Inverter with APD circuit by adding an auxiliary branch between the dc source and the bridge legs. The auxiliary branch is composed of a clamping capacitor, an auxiliary switch, and a resonant inductor. A ZVS pulsewidth modulation scheme is proposed for a single-phase Inverter with APD. The gate drive pulses are designed to realize the ZVS turn- on for the main switches of both APD circuit and single-phase Full-Bridge Inverter. Circuit operation stages are analyzed and ZVS conditions are given. Finally, the proposed ZVS Inverter with APD circuit is verified on a 1.5-kW Inverter prototype.
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A ZVS Grid-Connected Full-Bridge Inverter With a Novel ZVS SPWM Scheme
IEEE Transactions on Power Electronics, 2016Co-Authors: Yenan Chen, Min ChenAbstract:A zero-voltage switching (ZVS) grid-connected Full-Bridge Inverter and its modulation schemes are investigated. A novel sinusoidal pulse width modulation scheme for the ZVS Full-Bridge Inverter (ZVS SPWM) is proposed in this paper. The ZVS SPWM is evolved from the double-frequency SPWM by adding gate drive to the auxiliary switch. The ZVS condition is analyzed and the circulation loss of the resonant branch is optimized by adjusting the energy storage in the resonant inductor. The reverse recovery of the body-diode of MOSFET is relieved and ZVS is realized for both main and auxiliary switches. The filter inductors are significantly reduced with higher switching frequency. The design guideline of resonant parameters and the implementation of ZVS SPWM in DSP controller are introduced. The ZVS SPWM scheme is verified on a 3-kW Inverter prototype. According to the experimental result, peak efficiency as 98.8% is achieved.
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a soft switching full bridge Inverter with high efficiency
Energy Conversion Congress and Exposition, 2013Co-Authors: Yenan Chen, Min ChenAbstract:A Zero-Voltage-Switching (ZVS) PWM scheme for Full-Bridge Inverter with active-clamping technique is proposed. The ZVS condition is analyzed and the ZVS PWM scheme is designed to realize zero voltage switching for both main switches and auxiliary switch in a large power range. The ZVS PWM scheme also adjusts the energy stored in resonant inductor with variation of load to reduce the circulating loss in light load range. The switching frequency is increased and the filter inductor is significantly reduced. The experiment on a 3 kW prototype shows the realization of ZVS and high efficiency.
Prasopchok Hothongkham - One of the best experts on this subject based on the ideXlab platform.
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Analysis and comparison study of PWM and Phase-Shifted PWM Full-Bridge Inverter fed high-voltage High-Frequency Ozone Generator
2011 IEEE Ninth International Conference on Power Electronics and Drive Systems, 2011Co-Authors: Prasopchok Hothongkham, Somkiat Kongkachat, Narongchai ThodsapornAbstract:This paper presents the analysis and the comparison study of a High-voltage High-frequency Ozone Generator using PWM and Phase-Shifted PWM Full-Bridge Inverter as a power supply. The circuits operations of the Inverters are fully described. In order to ensure that zero voltage switching (ZVS) mode always operated over a certain range of a frequency variation, a series-compensated resonant inductor is included. The comparison study are ozone quantity and output voltage that supplied by the PWM and Phase-Shifted PWM Full-Bridge Inverter. The ozone generator fed by Phase-Shifted PWM Full-Bridge Inverter, is capability of varying ozone gas production quantity by varying the frequency and phase shift angle of the converter whilst the applied voltage to the electrode is kept constant. However, the ozone generator fed by PWM Full-Bridge Inverter, is capability of varying ozone gas production quantity by varying the frequency of the converter whilst the applied voltage to the electrode is decreased. As a consequence, the absolute ozone quantity affected by the frequency is possibly achieved.
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circuit analysis and modeling of a phase shifted pulsewidth modulation full bridge Inverter fed ozone generator with constant applied electrode voltage
IEEE Transactions on Power Electronics, 2010Co-Authors: Vijit Kinnares, Prasopchok HothongkhamAbstract:This paper proposes a circuit analysis and system modeling of an ozone generator using a phase-shifted pulsewidth modulation Full-Bridge Inverter connected to two electrodes via a step-up transformer. The circuit operation of the Inverter is fully described. Approximate models of the high-frequency transformer and the ozone-generating tube are given. Model parameter values are obtained from electrical characteristic measurement in conjunction with physical dimension calculation. In order to ensure that a zero-voltage soft-switching mode always operates over a certain range of a frequency variation, a series compensated resonant inductor is included. The advantage of the proposed system is a capability of varying ozone gas production quantity by varying the frequency of the Inverter while the applied electrode voltage is kept constant, in order to overcome a high-frequency effect on the transformer voltage regulation. As a consequence, the absolute ozone production affected by the frequency is possibly achieved. The correctness and validity of the proposed system are verified by both simulation and experimental results.
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Measurement of an ozone generator using a phase-shifted PWM full bridge Inverter
The 2010 International Power Electronics Conference - ECCE ASIA -, 2010Co-Authors: Prasopchok Hothongkham, Vijit KinnaresAbstract:This paper proposes the measurement of an ozone generator using a phase-shifted pulse width modulation (PWM) full bridge Inverter as a power supply. The method of electrode parameter measurement for an ozone generator is presented. An electrode set is represented by an equivalent circuit by parallel capacitor and resistor. The test was performed with high-frequency high-voltage ac power supply. Then voltage and charge characteristics were obtained leading to calculating values of the parallel capacitor and resistor. The validity of the obtained parameters is verified with a comparison between simulation and experimental results. It has proved that the proposed equivalent circuit with parameters obtained from the proposed method is valid which is in agreement with experimental results. It can be used for power supply and electrode design for generating ozone gas. The correctness of the proposed technique is verified by both simulation and experimental results.
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high voltage high frequency power supply using phase shift pwm full bridge Inverter fed ozone generator
International Symposium on Industrial Electronics, 2009Co-Authors: Prasopchok Hothongkham, Vijit KinnaresAbstract:This paper proposes the high-voltage high-frequency power supply for an ozone generator using a phase-shifted pulse width modulation (PWM) full bridge Inverter. The circuit operation is fully described. The high-frequency transformer and ozone generator mathematical models are also included for preliminarily calculating of instantaneous voltages and currents. The proposed system simulation using the MATLAB /SIMULINK software package is given. In order to ensure that zero voltage switching (ZVS) mode always operates over a certain range of a frequency variation, a series-compensated resonant inductor is included. The advantage of the proposed system is a capability of varying ozone gas production quantity by varying the frequency and phase shift angle of the converter whilst the applied voltage to the electrodes is kept constant. The correctness of the proposed technique is verified by both simulation and experimental results.
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analysis and modelling of an ozone generator using a phase shift pwm full bridge Inverter
Robotics and Biomimetics, 2009Co-Authors: Prasopchok Hothongkham, Vijit KinnaresAbstract:This paper proposes the analysis and modelling of an ozone generator using a phase-shift pulse width modulation (PWM) full bridge Inverter as a power supply. The circuit operation is fully described. The high frequency transformer and ozone generator mathematical models are also included for preliminarily calculating of instantaneous voltages and currents. The proposed system simulation using the MATLAB/SIMULINK software package is given. In order to ensure that zero voltage switch (ZVS) is always operated over a certain range of a frequency variation, a series-compensated resonant inductor is included. The advantage of the proposed system is a capability of varying ozone gas production quantity by varying the frequency of the converter whilst the applied voltage to the electrodes is kept constant. The correctness of the proposed technique is verified by both simulation and experimental results.
Vijit Kinnares - One of the best experts on this subject based on the ideXlab platform.
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circuit analysis and modeling of a phase shifted pulsewidth modulation full bridge Inverter fed ozone generator with constant applied electrode voltage
IEEE Transactions on Power Electronics, 2010Co-Authors: Vijit Kinnares, Prasopchok HothongkhamAbstract:This paper proposes a circuit analysis and system modeling of an ozone generator using a phase-shifted pulsewidth modulation Full-Bridge Inverter connected to two electrodes via a step-up transformer. The circuit operation of the Inverter is fully described. Approximate models of the high-frequency transformer and the ozone-generating tube are given. Model parameter values are obtained from electrical characteristic measurement in conjunction with physical dimension calculation. In order to ensure that a zero-voltage soft-switching mode always operates over a certain range of a frequency variation, a series compensated resonant inductor is included. The advantage of the proposed system is a capability of varying ozone gas production quantity by varying the frequency of the Inverter while the applied electrode voltage is kept constant, in order to overcome a high-frequency effect on the transformer voltage regulation. As a consequence, the absolute ozone production affected by the frequency is possibly achieved. The correctness and validity of the proposed system are verified by both simulation and experimental results.
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Measurement of an ozone generator using a phase-shifted PWM full bridge Inverter
The 2010 International Power Electronics Conference - ECCE ASIA -, 2010Co-Authors: Prasopchok Hothongkham, Vijit KinnaresAbstract:This paper proposes the measurement of an ozone generator using a phase-shifted pulse width modulation (PWM) full bridge Inverter as a power supply. The method of electrode parameter measurement for an ozone generator is presented. An electrode set is represented by an equivalent circuit by parallel capacitor and resistor. The test was performed with high-frequency high-voltage ac power supply. Then voltage and charge characteristics were obtained leading to calculating values of the parallel capacitor and resistor. The validity of the obtained parameters is verified with a comparison between simulation and experimental results. It has proved that the proposed equivalent circuit with parameters obtained from the proposed method is valid which is in agreement with experimental results. It can be used for power supply and electrode design for generating ozone gas. The correctness of the proposed technique is verified by both simulation and experimental results.
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high voltage high frequency power supply using phase shift pwm full bridge Inverter fed ozone generator
International Symposium on Industrial Electronics, 2009Co-Authors: Prasopchok Hothongkham, Vijit KinnaresAbstract:This paper proposes the high-voltage high-frequency power supply for an ozone generator using a phase-shifted pulse width modulation (PWM) full bridge Inverter. The circuit operation is fully described. The high-frequency transformer and ozone generator mathematical models are also included for preliminarily calculating of instantaneous voltages and currents. The proposed system simulation using the MATLAB /SIMULINK software package is given. In order to ensure that zero voltage switching (ZVS) mode always operates over a certain range of a frequency variation, a series-compensated resonant inductor is included. The advantage of the proposed system is a capability of varying ozone gas production quantity by varying the frequency and phase shift angle of the converter whilst the applied voltage to the electrodes is kept constant. The correctness of the proposed technique is verified by both simulation and experimental results.
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analysis and modelling of an ozone generator using a phase shift pwm full bridge Inverter
Robotics and Biomimetics, 2009Co-Authors: Prasopchok Hothongkham, Vijit KinnaresAbstract:This paper proposes the analysis and modelling of an ozone generator using a phase-shift pulse width modulation (PWM) full bridge Inverter as a power supply. The circuit operation is fully described. The high frequency transformer and ozone generator mathematical models are also included for preliminarily calculating of instantaneous voltages and currents. The proposed system simulation using the MATLAB/SIMULINK software package is given. In order to ensure that zero voltage switch (ZVS) is always operated over a certain range of a frequency variation, a series-compensated resonant inductor is included. The advantage of the proposed system is a capability of varying ozone gas production quantity by varying the frequency of the converter whilst the applied voltage to the electrodes is kept constant. The correctness of the proposed technique is verified by both simulation and experimental results.
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performance evaluation of an ozone generator using a phase shift pwm full bridge Inverter
International Conference on Electrical Engineering Electronics Computer Telecommunications and Information Technology, 2008Co-Authors: Prasopchok Hothongkham, Vijit KinnaresAbstract:This paper proposes an ozone generator using a phase shift PWM full bridge Inverter. The advantage of the proposed system is capable of varying ozone gas level by varying frequency of the converter whilst the output voltage is kept to be constant. In order to obtain such condition, the pulse width of the output voltage is varied. The gate signals are controlled by a microcontroller. The performance evaluation of the proposed system is given.
Raja Ayyanar - One of the best experts on this subject based on the ideXlab platform.
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Naturally Adaptive, Low-Loss Zero-Voltage-Transition Circuit for High-Frequency Full-Bridge Inverters With Hybrid PWM
IEEE Transactions on Power Electronics, 2018Co-Authors: Yinglai Xia, Raja AyyanarAbstract:This paper proposes a low-loss, auxiliary zero-voltage-transition (ZVT) circuit to realize zero-voltage-switching (ZVS) for all the main switches of a Full-Bridge Inverter, and inherent zero-current-switching (ZCS) turn-on and ZCS turn-off for the auxiliary switches. Two configurations consisting of discrete inductor and coupled inductor structures are proposed. The advantages of the proposed strategy include the provision to implement zero-state modulation schemes such as unipolar and hybrid pulse width modulation schemes in the Full-Bridge Inverter to achieve low THD, naturally adaptive auxiliary inductor current and the elimination of capacitor voltage balancing issues seen in other similar ZVT approaches. The modulation scheme and the commutation stages are analyzed in detail. The complete Inverter including the auxiliary ZVT branch is modeled in detail. Finally, a 1 kW, 400 kHz switching frequency Inverter of the proposed topology using SiC MOSFETs has been built to validate the theoretical analysis. The ZVT with hybrid modulation technique is implemented in DSP TMS320F28335 resulting in full ZVS for the main switches in the Full-Bridge Inverter. Compared to conventional hard switching Full-Bridge Inverter, the proposed scheme improves the California Energy Commission efficiency from 95.58% to 97.63% and the peak efficiency from 96.29% to 97.91%.
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Inductor feedback ZVT based, low THD single phase full bridge Inverter with hybrid modulation technique
2017 IEEE Applied Power Electronics Conference and Exposition (APEC), 2017Co-Authors: Yinglai Xia, Raja AyyanarAbstract:This paper proposes a topology based on zero-voltage-transition (ZVT) technique to realize zero-voltage-switching (ZVS) for all the main switches of the full bridge Inverter, and inherent zero-current-switching (ZCS) for the auxiliary switches. The advantages of the strategy include the provision to implement zero state modulation schemes such as unipolar or hybrid PWM scheme in the full bridge Inverters to decrease the inductor current THD, naturally adaptive auxiliary inductor current and elimination of need for large balancing capacitors. The modulation scheme and the commutation stages are analyzed in detail. The whole Inverter including the auxiliary ZVT branch is modelled. Finally a 1 kW, 400 kHz switching frequency Inverter of the proposed topology using SiC MOSFETs has been built to validate the theoretical analysis. The ZVT with hybrid modulation technique is implemented in DSP TMS320F28335 resulting in full ZVS for the main switches in the full bridge Inverter. The proposed scheme can save up to 32 % of the switching loss compared with no ZVT case.
