The Experts below are selected from a list of 180141 Experts worldwide ranked by ideXlab platform
Shuilin Tian - One of the best experts on this subject based on the ideXlab platform.
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a simplified equivalent Circuit Model of series resonant converter
IEEE Transactions on Power Electronics, 2016Co-Authors: Shuilin Tian, Qiang LiAbstract:Equivalent Circuit Models are useful design tools for control and have already well served their purposes in pulse width modulation dc–dc converters. However, no simple equivalent Circuit Model is available yet for resonant-type dc–dc converters. Up to now, the most successful equivalent Circuit Model of series resonant converter (SRC) is based on extended describing function concept, which was proposed by Yang et al. [30]. However, the equivalent Circuit is a complicated fifth order with the cross-coupling effect and no analytical solution is provided for transfer functions. This paper proposes a simple third-order equivalent Circuit Model of SRC. The equivalent Circuit Model is derived by simplification of the original fifth-order equivalent Circuit, based on the fact that the resonant capacitor behaves like an equivalent resonant inductor with respect to the modulation frequency. The equivalent Circuit Model can predict the dynamic behavior very well when the switching frequency is below, close to, or above the resonant frequency. Furthermore, for the first time, analytical expressions of all transfer functions, i.e., control-to-output, input-to-output, output impedance, and input impedance are provided. These analytical transfer functions will serve as a useful tool for the feedback design. The equivalent Circuit Model is verified by Simplis simulation and experimental results.
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small signal equivalent Circuit Model of series resonant converter
European Conference on Cognitive Ergonomics, 2015Co-Authors: Shuilin Tian, Qiang Li, Bin LiAbstract:A simple third-order equivalent Circuit Model of series resonant converter (SRC) is proposed in this paper. Up to now, the most successful equivalent Circuit Model of SRC is based on extended describing function concept, which is proposed by Dr. E. Yang [30]. However, the equivalent Circuit is a complicated fifth-order Circuit with the cross-coupling effect and no analytical solution is provided for transfer functions. This paper proposes a methodology to simplify the fifth-order equivalent Circuit to a third-order equivalent Circuit. The equivalent Circuit Model can predict the dynamic behavior very well when switching frequency is below, close to or above resonant frequency. Furthermore, for the first time, analytical expressions of transfer functions are provided to serve as a useful tool for feedback design. The equivalent Circuit Model is verified by Simplis simulation and experimental results.
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Unified equivalent Circuit Model of V 2 control
2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014, 2014Co-Authors: Shuilin Tian, Fred C. Lee, Yingyi YanAbstract:V2 control and its variety named ripple-based control, are popular control schemes in point-of-load Buck converters and Voltage Regulators for microprocessor. This control scheme is elegant when output capacitors with sufficient ESR are employed, such as OSCON capacitors. However, in most cases with small-ESR capacitors, such as ceramic capacitors, instability problem will occur. Up to now, no equivalent Circuit Model is proposed which is able to predict instability issue. This paper proposes a unified equivalent Circuit Model which is suitable to all kinds of capacitors by considering the effect of both inductor current ripple and capacitor voltage ripple. The equivalent Circuit Model is a simple yet accurate, complete Model and can be used to investigate all transfer functions. The proposed equivalent Circuit Model is applicable to both variable frequency modulation and constant frequency modulation. Furthermore, the Model can be extended to enhanced V2 control and muti-phase V2 converters. The equivalent Circuit Model is verified with Simplis simulation and experimental results.
Woo-young Choi - One of the best experts on this subject based on the ideXlab platform.
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equivalent Circuit Model for si avalanche photodetectors fabricated in standard cmos process
IEEE Electron Device Letters, 2008Co-Authors: Hyo-soon Kang, Woo-young ChoiAbstract:We present an equivalent Circuit Model for CMOS-compatible avalanche photodetectors. The equivalent Circuit Model includes an inductive component for avalanche delay, a current source for photogenerated carriers, and several components that Model the device structure and parasitic effects. The Model provides accurate impedance characteristics and photodetection frequency responses.
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Equivalent Circuit Model for Si Avalanche Photodetectors Fabricated in
2008Co-Authors: Hyo-soon Kang, Woo-young ChoiAbstract:We present an equivalent Circuit Model for CMOS- compatible avalanche photodetectors. The equivalent Circuit Model includes an inductive component for avalanche delay, a cur- rent source for photogenerated carriers, and several components that Model the device structure and parasitic effects. The Model provides accurate impedance characteristics and photodetection frequency responses.
Qiang Li - One of the best experts on this subject based on the ideXlab platform.
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a simplified equivalent Circuit Model of series resonant converter
IEEE Transactions on Power Electronics, 2016Co-Authors: Shuilin Tian, Qiang LiAbstract:Equivalent Circuit Models are useful design tools for control and have already well served their purposes in pulse width modulation dc–dc converters. However, no simple equivalent Circuit Model is available yet for resonant-type dc–dc converters. Up to now, the most successful equivalent Circuit Model of series resonant converter (SRC) is based on extended describing function concept, which was proposed by Yang et al. [30]. However, the equivalent Circuit is a complicated fifth order with the cross-coupling effect and no analytical solution is provided for transfer functions. This paper proposes a simple third-order equivalent Circuit Model of SRC. The equivalent Circuit Model is derived by simplification of the original fifth-order equivalent Circuit, based on the fact that the resonant capacitor behaves like an equivalent resonant inductor with respect to the modulation frequency. The equivalent Circuit Model can predict the dynamic behavior very well when the switching frequency is below, close to, or above the resonant frequency. Furthermore, for the first time, analytical expressions of all transfer functions, i.e., control-to-output, input-to-output, output impedance, and input impedance are provided. These analytical transfer functions will serve as a useful tool for the feedback design. The equivalent Circuit Model is verified by Simplis simulation and experimental results.
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small signal equivalent Circuit Model of series resonant converter
European Conference on Cognitive Ergonomics, 2015Co-Authors: Shuilin Tian, Qiang Li, Bin LiAbstract:A simple third-order equivalent Circuit Model of series resonant converter (SRC) is proposed in this paper. Up to now, the most successful equivalent Circuit Model of SRC is based on extended describing function concept, which is proposed by Dr. E. Yang [30]. However, the equivalent Circuit is a complicated fifth-order Circuit with the cross-coupling effect and no analytical solution is provided for transfer functions. This paper proposes a methodology to simplify the fifth-order equivalent Circuit to a third-order equivalent Circuit. The equivalent Circuit Model can predict the dynamic behavior very well when switching frequency is below, close to or above resonant frequency. Furthermore, for the first time, analytical expressions of transfer functions are provided to serve as a useful tool for feedback design. The equivalent Circuit Model is verified by Simplis simulation and experimental results.
Hyo-soon Kang - One of the best experts on this subject based on the ideXlab platform.
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equivalent Circuit Model for si avalanche photodetectors fabricated in standard cmos process
IEEE Electron Device Letters, 2008Co-Authors: Hyo-soon Kang, Woo-young ChoiAbstract:We present an equivalent Circuit Model for CMOS-compatible avalanche photodetectors. The equivalent Circuit Model includes an inductive component for avalanche delay, a current source for photogenerated carriers, and several components that Model the device structure and parasitic effects. The Model provides accurate impedance characteristics and photodetection frequency responses.
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Equivalent Circuit Model for Si Avalanche Photodetectors Fabricated in
2008Co-Authors: Hyo-soon Kang, Woo-young ChoiAbstract:We present an equivalent Circuit Model for CMOS- compatible avalanche photodetectors. The equivalent Circuit Model includes an inductive component for avalanche delay, a cur- rent source for photogenerated carriers, and several components that Model the device structure and parasitic effects. The Model provides accurate impedance characteristics and photodetection frequency responses.
Anthony Grbic - One of the best experts on this subject based on the ideXlab platform.
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A Circuit Model for Electrically Small Antennas
IEEE Transactions on Antennas and Propagation, 2012Co-Authors: Carl Pfeiffer, Anthony GrbicAbstract:A Circuit Model for electrically small antennas is introduced that is based on their frequency-dependent polarizabilities. This Model is useful for straightforwardly analyzing several different small antenna geometries. A negative permittivity sphere, shell, and spheroid are all analyzed. An inductively loaded dipole, a top-hat loaded dipole, and a spherical sheet impedance are also analyzed. The Circuit Model provides the antenna's radiation quality factor (Q), radiation efficiency (ηrad), and bandwidth. It also offers insight into the operation of the antenna which can aid and simplify design.
