The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

Min Chen - One of the best experts on this subject based on the ideXlab platform.

  • A ZVS Grid-Connected Full-Bridge Inverter With a Novel ZVS SPWM Scheme
    IEEE Transactions on Power Electronics, 2016
    Co-Authors: Yenan Chen, Min Chen
    Abstract:

    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.

  • a soft switching full Bridge Inverter with high efficiency
    Energy Conversion Congress and Exposition, 2013
    Co-Authors: Yenan Chen, Min Chen
    Abstract:

    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.

Vijit Kinnares - One of the best experts on this subject based on the ideXlab platform.

  • 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, 2010
    Co-Authors: Vijit Kinnares, Prasopchok Hothongkham
    Abstract:

    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.

  • high voltage high frequency power supply using phase shift pwm full Bridge Inverter fed ozone generator
    International Symposium on Industrial Electronics, 2009
    Co-Authors: Prasopchok Hothongkham, Vijit Kinnares
    Abstract:

    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.

  • analysis and modelling of an ozone generator using a phase shift pwm full Bridge Inverter
    Robotics and Biomimetics, 2009
    Co-Authors: Prasopchok Hothongkham, Vijit Kinnares
    Abstract:

    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.

  • 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, 2008
    Co-Authors: Prasopchok Hothongkham, Vijit Kinnares
    Abstract:

    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.

Prasopchok Hothongkham - One of the best experts on this subject based on the ideXlab platform.

  • 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, 2010
    Co-Authors: Vijit Kinnares, Prasopchok Hothongkham
    Abstract:

    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.

  • high voltage high frequency power supply using phase shift pwm full Bridge Inverter fed ozone generator
    International Symposium on Industrial Electronics, 2009
    Co-Authors: Prasopchok Hothongkham, Vijit Kinnares
    Abstract:

    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.

  • analysis and modelling of an ozone generator using a phase shift pwm full Bridge Inverter
    Robotics and Biomimetics, 2009
    Co-Authors: Prasopchok Hothongkham, Vijit Kinnares
    Abstract:

    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.

  • 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, 2008
    Co-Authors: Prasopchok Hothongkham, Vijit Kinnares
    Abstract:

    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.

Yenan Chen - One of the best experts on this subject based on the ideXlab platform.

  • A ZVS Grid-Connected Full-Bridge Inverter With a Novel ZVS SPWM Scheme
    IEEE Transactions on Power Electronics, 2016
    Co-Authors: Yenan Chen, Min Chen
    Abstract:

    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.

  • a soft switching full Bridge Inverter with high efficiency
    Energy Conversion Congress and Exposition, 2013
    Co-Authors: Yenan Chen, Min Chen
    Abstract:

    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.

Huai Wang - One of the best experts on this subject based on the ideXlab platform.

  • a reconfigurable series resonant dc dc converter for wide input and wide output voltages
    Applied Power Electronics Conference, 2017
    Co-Authors: Yanfeng Shen, Huai Wang, Frede Blaabjerg, Ahmed Al Durra
    Abstract:

    This paper proposes a dual-Bridge based LC series resonant dc-dc converter. The input Inverter unit incorporates two Bridge structures, i.e., a full-Bridge Inverter and a half-Bridge Inverter. For the output rectifier, it can be a full-Bridge rectifier or an asymmetric half-Bridge rectifier. Different from the conventional resonant converter, a fixed-frequency PWM control is employed which makes the optimization of magnetic components easier. The primary-side switches can achieve ZVS and the secondary-side diodes turn off with ZCS. In addition, the root-mean-square (RMS) values of the transformer currents do not significantly vary with respect to the voltage variation. Therefore, this converter can maintain high efficiency over a wide voltage range. The topology and operating principle are firstly described. Then the dc voltage gain and the RMS current characteristics are detailed. Finally, experimental results from a 500-W converter prototype verify the effectiveness of analysis, and the advantages of the proposed converter.

  • low voltage ride through of single phase transformerless photovoltaic Inverters
    Energy Conversion Congress and Exposition, 2013
    Co-Authors: Yongheng Yang, Frede Blaabjerg, Huai Wang
    Abstract:

    Transformerless photovoltaic (PV) Inverters are going to be more widely adopted in order to achieve high efficiency, as the penetration level of PV systems is continuously booming. However, problems may arise in highly PV-integrated distribution systems. For example, a sudden stoppage of all PV systems due to anti-islanding protection may trigger grid disturbances. Thus, standards featuring with ancillary services for the next generation PV systems are under a revision in some countries. The future PV systems have to provide a full range of services as what the conventional power plants do, e.g. Low Voltage Ride-Through (LVRT) under grid faults and grid support service. In order to map future challenges, the LVRT capability of three mainstream single-phase transformerless PV Inverters under grid faults are explored in this paper. Control strategies with reactive power injections are also discussed. The selected Inverters are the full-Bridge Inverter with bipolar modulation, full-Bridge Inverter with DC bypass and the Highly Efficient and Reliable Inverter Concept (HERIC). A 1 kW single-phase grid-connected PV system is analyzed to verify the discussions. The tests confirmed that, although the HERIC Inverter is the best candidate in terms of efficiency, it is not very feasible in case of a voltage sag. The other topologies are capable of providing reactive current during LVRT. A benchmarking of those Inverters is also provided, which offers the possibility to select appropriate devices and to further optimize the system.