The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform

A. Ioinovici - One of the best experts on this subject based on the ideXlab platform.

  • High efficiency PWM zero-Voltage-transition boost converter: AC small signal analysis
    IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, 2000
    Co-Authors: Y. Berkovich, A. Ioinovici
    Abstract:

    A dc-dc boost converter operating under zero-Voltage-transition conditions is presented. Its excellent performance deserves a detailed analysis. An Equivalent circuit is derived in order to characterize the switching sequence. It contains an Equivalent current source and an Equivalent Voltage source whose nonlinear functions take different forms for each switching topology. The small-signal open-loop and closed-loop transfer functions, including the audio susceptibility are derived. Design-oriented stability criteria are formulated. The theoretical time-domain response and Bode characteristics are checked by experiments or PSPICE simulation.

  • ISCAS (5) - Dynamic model of PWM zero-Voltage-transition DC-DC boost converter
    ISCAS'99. Proceedings of the 1999 IEEE International Symposium on Circuits and Systems VLSI (Cat. No.99CH36349), 1999
    Co-Authors: Y. Berkovich, A. Ioinovici
    Abstract:

    An Equivalent dynamic model of a ZVT boost-converter previously published by the authors is the subject of present paper. The model contains an Equivalent current source and an Equivalent Voltage source whose nonlinear functions take different forms for each switching topology. The model serves for an AC small-signal analysis. The small-signal open-loop and closed-loop transfer functions, including the audio susceptibility are derived. Design-oriented stability criteria are formulated. The theoretical time-domain response and Bode characteristics are checked by experiments or PSPICE simulation.

  • Dynamic model of PWM zero-Voltage-transition DC-DC boost converter
    1999 IEEE International Symposium on Circuits and Systems (ISCAS), 1999
    Co-Authors: Y. Berkovich, A. Ioinovici
    Abstract:

    An Equivalent dynamic model of a ZVT boost-converter previously published by the authors is the subject of present paper. The model contains an Equivalent current source and an Equivalent Voltage source whose nonlinear functions take different forms for each switching topology. The model serves for an AC small-signal analysis. The small-signal open-loop and closed-loop transfer functions, including the audio susceptibility are derived. Design-oriented stability criteria are formulated. The theoretical time-domain response and Bode characteristics are checked by experiments or PSPICE simulation.

Y. Berkovich - One of the best experts on this subject based on the ideXlab platform.

  • High efficiency PWM zero-Voltage-transition boost converter: AC small signal analysis
    IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, 2000
    Co-Authors: Y. Berkovich, A. Ioinovici
    Abstract:

    A dc-dc boost converter operating under zero-Voltage-transition conditions is presented. Its excellent performance deserves a detailed analysis. An Equivalent circuit is derived in order to characterize the switching sequence. It contains an Equivalent current source and an Equivalent Voltage source whose nonlinear functions take different forms for each switching topology. The small-signal open-loop and closed-loop transfer functions, including the audio susceptibility are derived. Design-oriented stability criteria are formulated. The theoretical time-domain response and Bode characteristics are checked by experiments or PSPICE simulation.

  • ISCAS (5) - Dynamic model of PWM zero-Voltage-transition DC-DC boost converter
    ISCAS'99. Proceedings of the 1999 IEEE International Symposium on Circuits and Systems VLSI (Cat. No.99CH36349), 1999
    Co-Authors: Y. Berkovich, A. Ioinovici
    Abstract:

    An Equivalent dynamic model of a ZVT boost-converter previously published by the authors is the subject of present paper. The model contains an Equivalent current source and an Equivalent Voltage source whose nonlinear functions take different forms for each switching topology. The model serves for an AC small-signal analysis. The small-signal open-loop and closed-loop transfer functions, including the audio susceptibility are derived. Design-oriented stability criteria are formulated. The theoretical time-domain response and Bode characteristics are checked by experiments or PSPICE simulation.

  • Dynamic model of PWM zero-Voltage-transition DC-DC boost converter
    1999 IEEE International Symposium on Circuits and Systems (ISCAS), 1999
    Co-Authors: Y. Berkovich, A. Ioinovici
    Abstract:

    An Equivalent dynamic model of a ZVT boost-converter previously published by the authors is the subject of present paper. The model contains an Equivalent current source and an Equivalent Voltage source whose nonlinear functions take different forms for each switching topology. The model serves for an AC small-signal analysis. The small-signal open-loop and closed-loop transfer functions, including the audio susceptibility are derived. Design-oriented stability criteria are formulated. The theoretical time-domain response and Bode characteristics are checked by experiments or PSPICE simulation.

J.a. Martinez - One of the best experts on this subject based on the ideXlab platform.

  • Adaptive two-loop Voltage-mode control of DC-DC switching converters
    IEEE Transactions on Industrial Electronics, 2006
    Co-Authors: E. Figueres, G. Garcera, M. Pascual, J.m. Benavent, J.a. Martinez
    Abstract:

    A new two-loop control scheme for Voltage-mode control (VMC) of dc-dc switching converters is presented. The proposed method adds a high-gain robust loop with two controllers to the conventional VMC loop, achieving an analog "adaptive" loop in which the "Equivalent Voltage regulator" varies with the changing power stage parameters given as follows: 1) input Voltage; 2) load; and 3) component tolerances. The loop significantly improves the disturbance rejection of the control system, i.e., closed-loop output impedance and audiosusceptibility while preserving the stability and the loop gain crossover frequency to a significant extent. Both the small-signal analysis and the experimental results carried out on a buck converter demonstrate the superiority of the proposed scheme with respect to the conventional single loop.

E. Figueres - One of the best experts on this subject based on the ideXlab platform.

  • Adaptive two-loop Voltage-mode control of DC-DC switching converters
    IEEE Transactions on Industrial Electronics, 2006
    Co-Authors: E. Figueres, G. Garcera, M. Pascual, J.m. Benavent, J.a. Martinez
    Abstract:

    A new two-loop control scheme for Voltage-mode control (VMC) of dc-dc switching converters is presented. The proposed method adds a high-gain robust loop with two controllers to the conventional VMC loop, achieving an analog "adaptive" loop in which the "Equivalent Voltage regulator" varies with the changing power stage parameters given as follows: 1) input Voltage; 2) load; and 3) component tolerances. The loop significantly improves the disturbance rejection of the control system, i.e., closed-loop output impedance and audiosusceptibility while preserving the stability and the loop gain crossover frequency to a significant extent. Both the small-signal analysis and the experimental results carried out on a buck converter demonstrate the superiority of the proposed scheme with respect to the conventional single loop.

  • Novel analog adaptive 3-loop average current mode control of parallel DC-DC converters
    IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02, 2002
    Co-Authors: G. Garcera, E. Figueres, M. Pascual, J.m. Benavent
    Abstract:

    A new three-loop control scheme for multimodule parallel DC-DC converters with average current mode control (ACC) is presented. The proposed loop adds a high gain robust loop with two controllers to the conventional current and Voltage ACC loops, achieving an analog adaptive Voltage loop in which the Equivalent Voltage regulator varies with the changing power stage parameters: number of modules, input Voltage, load and component tolerances. The loop improves drastically the disturbance rejection of the control system, i.e. closed loop output impedance and audiosusceptibility, while preserving stability and loop gain crossover frequency to a significant extent.

Bo Zhang - One of the best experts on this subject based on the ideXlab platform.

  • An Equivalent Voltage Source Placement Rule for Impedance Source Network and Performance Assessment
    IEEE Transactions on Industrial Electronics, 2018
    Co-Authors: Zhu Chen, Yanfeng Chen, Bo Zhang
    Abstract:

    This paper proposes an Equivalent rule of source placement in different positions of the impedance source network. By applying the rule, allowable positions for placing source are discovered in the Z source network, capacitor assisted quasi Z source network, and other impedance source networks. The rule is feasible to find out all the possible subnetworks from its parent-network methodically by just changing the positions of the Voltage source. Performance differences of the corresponding subnetworks caused by the different positions of Voltage source are also discussed. Finally, simulations and experiments are implemented with dc load to validate the rule of source placement.

  • A novel high gain DC-DC converter with coupled inductor Voltage multiplier
    2014 International Power Electronics and Application Conference and Exposition, 2014
    Co-Authors: Bo Zhang
    Abstract:

    This paper proposes a novel high gain DC-DC converter, the core structure of the circuit is a bridge which is composed of two power switches and two Equivalent Voltage sources. The two Equivalent Voltage sources are charged in parallel during the two switches turn on and are discharged in series during the two switches turn off, which makes the converter produce high output Voltage to realize high Voltage gain without extremely large duty cycle. In addition, the Equivalent source is implemented by using coupled inductor Voltage multiplier technique, which can further improve Voltage gain and reduce switch Voltage stress. The simulation and experimental results verify the correctness of the converter derivation and analysis.