The Experts below are selected from a list of 8970 Experts worldwide ranked by ideXlab platform

Craig B. Rogers - One of the best experts on this subject based on the ideXlab platform.

  • Z-Source-Converter-Based Energy-Recycling Zero-Voltage Electronic Loads
    IEEE Transactions on Industrial Electronics, 2009
    Co-Authors: Julio C. Rosas-caro, Fang Zheng Peng, Honnyong Cha, Craig B. Rogers
    Abstract:

    This paper proposes two high-efficiency energy-recycling zero-voltage electronic loads (ELs) based on a Z-Source converter. ELs are a family of power converters which are used as variable impedance loads in several applications. Such applications include testing of photovoltaic (PV) cells, power converters, and power supplies or frequency control of stand-alone microgeneration. In PV-cell performance tests, the zero-voltage operation, near the short-circuit point of the PV cell's I- V curve, creates a challenge for EL design. The converter that is suitable for this application must have the Ideal Current Source behavior because the challenge is to draw a specific constant Current from the Source under test even during the zero-voltage condition. The energy recycling principle increases the efficiency and allows the construction of high-power ELs. The proposed topologies are based on the Z-Source converter and achieve the Ideal Current Source behavior of draining an adjustable Current even when the Source voltage is zero. These topologies also provide power recycling for energy saving and for developing high-power ELs. The first configuration is based on the traditional Z-Source converter, and the second one is based on the recently proposed quasi Z-Source converter. Two prototypes were analyzed and built. Experimental results are provided to verify the principle of operation.

  • Z-Source converter based zero voltage electronic load
    2008 IEEE Power Electronics Specialists Conference, 2008
    Co-Authors: Julio C. Rosas-caro, Fang Zheng Peng, Honnyong Cha, Craig B. Rogers
    Abstract:

    This paper proposes a zero-voltage electronic load based on a Z-Source converter. Electronic loads are a family of power converters used as a load in several applications such as photovoltaic [PV] cell performance tests or frequency control of stand alone micro generation. In PV cell performance tests; the zero voltage operation, caused by short circuit of the PV cell, is the main challenge for electronic load design. The Ideal electronic load suitable for this application is an Ideal Current Source because the challenge is to draw a specific constant Current from the Source under test [SUT] even during the zero voltage condition. The proposed converter which is based on the Z- Source achieves the Ideal Current Source behavior of draining an adjustable Current even when the Source voltage is zero. A prototype was built to verify the principle of operation and experimental results are provided.

Julio C. Rosas-caro - One of the best experts on this subject based on the ideXlab platform.

  • Z-Source-Converter-Based Energy-Recycling Zero-Voltage Electronic Loads
    IEEE Transactions on Industrial Electronics, 2009
    Co-Authors: Julio C. Rosas-caro, Fang Zheng Peng, Honnyong Cha, Craig B. Rogers
    Abstract:

    This paper proposes two high-efficiency energy-recycling zero-voltage electronic loads (ELs) based on a Z-Source converter. ELs are a family of power converters which are used as variable impedance loads in several applications. Such applications include testing of photovoltaic (PV) cells, power converters, and power supplies or frequency control of stand-alone microgeneration. In PV-cell performance tests, the zero-voltage operation, near the short-circuit point of the PV cell's I- V curve, creates a challenge for EL design. The converter that is suitable for this application must have the Ideal Current Source behavior because the challenge is to draw a specific constant Current from the Source under test even during the zero-voltage condition. The energy recycling principle increases the efficiency and allows the construction of high-power ELs. The proposed topologies are based on the Z-Source converter and achieve the Ideal Current Source behavior of draining an adjustable Current even when the Source voltage is zero. These topologies also provide power recycling for energy saving and for developing high-power ELs. The first configuration is based on the traditional Z-Source converter, and the second one is based on the recently proposed quasi Z-Source converter. Two prototypes were analyzed and built. Experimental results are provided to verify the principle of operation.

  • Z-Source converter based zero voltage electronic load
    2008 IEEE Power Electronics Specialists Conference, 2008
    Co-Authors: Julio C. Rosas-caro, Fang Zheng Peng, Honnyong Cha, Craig B. Rogers
    Abstract:

    This paper proposes a zero-voltage electronic load based on a Z-Source converter. Electronic loads are a family of power converters used as a load in several applications such as photovoltaic [PV] cell performance tests or frequency control of stand alone micro generation. In PV cell performance tests; the zero voltage operation, caused by short circuit of the PV cell, is the main challenge for electronic load design. The Ideal electronic load suitable for this application is an Ideal Current Source because the challenge is to draw a specific constant Current from the Source under test [SUT] even during the zero voltage condition. The proposed converter which is based on the Z- Source achieves the Ideal Current Source behavior of draining an adjustable Current even when the Source voltage is zero. A prototype was built to verify the principle of operation and experimental results are provided.

Xin Zhou - One of the best experts on this subject based on the ideXlab platform.

  • A high-dynamic range Current Source gate driver for switching-loss reduction of high-side switch in buck converter
    IEEE Transactions on Power Electronics, 2010
    Co-Authors: Xin Zhou, Zhigang Liang, Alex Huang
    Abstract:

    In this letter, a high-dynamic range Current Source gate driver (HD-CSD) circuit is proposed to reduce the switching loss of the high-side switch in buck converter with wide variation of the gate resistance. Hard switching loss is the major loss in high-side switch and limits the high switching-frequency application of dc-dc converter. Comparing with conventional voltage Source gate driver (VSD) and the reported four switches CSD (4S-CSD), the proposed HD-CSD behaves more like the Ideal Current Source driver which can realize the fast switching of power switches to reduce the switching loss. In addition, with proposed HD-CSD, impact of gate resistance that limits the switching speed of the power switch can be greatly reduced. Experimental results are presented to show the power efficiency improvement of buck converter with HD-CSD high-side driver comparing with VSD and 4S-CSD high-side drivers at switching frequency of 1 MHz.

  • A new resonant gate driver for switching loss reduction of high side switch in buck converter
    2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2010
    Co-Authors: Xin Zhou, Zhigang Liang, Alex Q. Huang
    Abstract:

    In this paper, a new resonant gate driver circuits is proposed to reduce the switching loss of high side switch in buck converter. Hard switching causes major parts of the power loss in high side switch and limits high switching frequency application of DC-DC converter. The proposed resonant gate driver behaves more like the Ideal Current Source driver which can fast turn-on/turn-off power switch to reduce switching loss. In addition, with proposed resonant gate driver, impact of parasitic gate resistance on switching speed of power switch can be greatly reduced. Test results show that, for buck converter with 12V input voltage, 1.3V output voltage, 10A load Current and 5.5Ω gate resistance, comparing to conventional driver, with the proposed resonant gate driver for high side switch, total efficiency of buck converter can be improved by more than 3.5%.

Alex Huang - One of the best experts on this subject based on the ideXlab platform.

  • A high-dynamic range Current Source gate driver for switching-loss reduction of high-side switch in buck converter
    IEEE Transactions on Power Electronics, 2010
    Co-Authors: Xin Zhou, Zhigang Liang, Alex Huang
    Abstract:

    In this letter, a high-dynamic range Current Source gate driver (HD-CSD) circuit is proposed to reduce the switching loss of the high-side switch in buck converter with wide variation of the gate resistance. Hard switching loss is the major loss in high-side switch and limits the high switching-frequency application of dc-dc converter. Comparing with conventional voltage Source gate driver (VSD) and the reported four switches CSD (4S-CSD), the proposed HD-CSD behaves more like the Ideal Current Source driver which can realize the fast switching of power switches to reduce the switching loss. In addition, with proposed HD-CSD, impact of gate resistance that limits the switching speed of the power switch can be greatly reduced. Experimental results are presented to show the power efficiency improvement of buck converter with HD-CSD high-side driver comparing with VSD and 4S-CSD high-side drivers at switching frequency of 1 MHz.

Fang Zheng Peng - One of the best experts on this subject based on the ideXlab platform.

  • Z-Source-Converter-Based Energy-Recycling Zero-Voltage Electronic Loads
    IEEE Transactions on Industrial Electronics, 2009
    Co-Authors: Julio C. Rosas-caro, Fang Zheng Peng, Honnyong Cha, Craig B. Rogers
    Abstract:

    This paper proposes two high-efficiency energy-recycling zero-voltage electronic loads (ELs) based on a Z-Source converter. ELs are a family of power converters which are used as variable impedance loads in several applications. Such applications include testing of photovoltaic (PV) cells, power converters, and power supplies or frequency control of stand-alone microgeneration. In PV-cell performance tests, the zero-voltage operation, near the short-circuit point of the PV cell's I- V curve, creates a challenge for EL design. The converter that is suitable for this application must have the Ideal Current Source behavior because the challenge is to draw a specific constant Current from the Source under test even during the zero-voltage condition. The energy recycling principle increases the efficiency and allows the construction of high-power ELs. The proposed topologies are based on the Z-Source converter and achieve the Ideal Current Source behavior of draining an adjustable Current even when the Source voltage is zero. These topologies also provide power recycling for energy saving and for developing high-power ELs. The first configuration is based on the traditional Z-Source converter, and the second one is based on the recently proposed quasi Z-Source converter. Two prototypes were analyzed and built. Experimental results are provided to verify the principle of operation.

  • Z-Source converter based zero voltage electronic load
    2008 IEEE Power Electronics Specialists Conference, 2008
    Co-Authors: Julio C. Rosas-caro, Fang Zheng Peng, Honnyong Cha, Craig B. Rogers
    Abstract:

    This paper proposes a zero-voltage electronic load based on a Z-Source converter. Electronic loads are a family of power converters used as a load in several applications such as photovoltaic [PV] cell performance tests or frequency control of stand alone micro generation. In PV cell performance tests; the zero voltage operation, caused by short circuit of the PV cell, is the main challenge for electronic load design. The Ideal electronic load suitable for this application is an Ideal Current Source because the challenge is to draw a specific constant Current from the Source under test [SUT] even during the zero voltage condition. The proposed converter which is based on the Z- Source achieves the Ideal Current Source behavior of draining an adjustable Current even when the Source voltage is zero. A prototype was built to verify the principle of operation and experimental results are provided.