A few simple switching structures, formed by either two capacitors and two-three diodes (C-switching), or two inductors and two-three diodes (L-switching) are proposed. These structures can be of two types: “step-down” and “step-up.”These blocks are inserted in classical converters: buck, boost, buck–boost,C´ uk, Zeta, Sepic. The “step-down” C- or L-switching structures can be combined with […]
Archives for June 2011
Photovoltaic Parallel Resonant DC-link Soft Switching Inverter using Hysteresis Current Control-Matlab-Power Electronics-2010
This paper proposes a photovoltaic parallel resonant dc-link soft switching inverter using hysteresis current control.The proposed system includes a dc-link switch for soft switching. When the dc-link switch is turned off, the inverter switches are turned on and off with zero voltage switching using hysteresis current controller. So, all of the switches in the proposed […]
Dead-Time Elimination for Voltage Source Inverters-Matlab-Power Electronics-2008
A novel dead-time elimination method is presented in this paper for voltage source inverters. This method is based on decomposing of a generic phase-leg into two basic switching cells, which are configured with a controllable switch in series with an uncontrollable diode. Therefore, dead-time is not needed. In comparison to using expensive current sensors, this […]
A Modified SEPIC Converter for High-Power-Factor Rectifier and Universal Input Voltage Applications-Matlab-Power Electronics-2008
A high-power-factor rectifier suitable for universal line base on a modified version of the single-ended primary inductance converter (SEPIC) is presented in this paper. The voltage multiplier technique is applied to the classical SEPIC circuit, obtaining new operation characteristics as low-switch-voltage operation and high static gain at low line voltage. The new configuration also allows […]
Quasi-Z-Source Inverter for Photovoltaic Power Generation Systems-Matlab-Power Electronics-2009
This paper presents a quasi-Z-source inverter (qZSI) that is a new topology derived from the traditional Z-source inverter (ZSI). The qZSI inherits all the advantages of the ZSI,which can realize buck/boost, inversion and power conditioning in a single stage with improved reliability. In addition, the proposed qZSI has the unique advantages of lower component ratings […]
A Hybrid Three Phase Current Source Rectifier For High Power Application-Matlab-Power Electronics-2009
This paper presents a novel hybrid three phase current source rectifier (CSR) that achieve unity power factor and low current THD for high power application. The rectifier is composed of a traditional six-pulse thyristor bridge and two controllable switches such as the isolated gate bipolar transistor (IGBT). The unity power factor and low current THD […]
Analysis and Implementation of a Hybrid High-Power-Factor Three-Phase Unidirectional Rectifier-Matlab-Power Electronics-2009
This paper describes the conception and analysis of a unidirectional hybrid three-phase rectifier suitable for mediumand high-power applications. The rectifier is composed of a single-switch diode bridge boost-type rectifier in parallel with a pulsewidth modulation (PWM) three-phase unidirectional boost rectifier. The objective is to obtain a structure capable of providing sinusoidal input currents with low […]
Comparison of Z-Source Inverter and Traditional Two-Stage Boost-Buck Inverter in Grid-tied Renewable Energy Generation-Matlab-Power Electronics-2009
Z-source inverter and traditional two-stage buck-boost inverter are compared with respect to the voltage stress and maximum current stress of semiconductor devices and the inverter efficiency in grid-tied renewable energy generation application. The operation principles of the two inverters are introduced firstly,considering the two different PWM strategies used in Z-source inverter. Based on the principles, […]
A Novel Power Management Control Strategy for Stand-alone Photovoltaic Power System-Matlab-Power Electronics-2009
The solar photovoltaic power has received great attention and experienced impressive progress in the countries all over the world in recent years because of more and more serious energy crisis and environmental pollution. This paper proposes a novel power management control strategy for stand-alone photovoltaic power system, which consists of a solar cell array, a […]
A Novel Single-Stage High-Power-Factor Electronic Ballast With Boost Topology for Multiple Fluorescent Lamps-Matlab-Power Electronics-2009
A novel single-stage high-power-factor (HPF) electronic ballast with boost topology for multiple fluorescent lamps is presented in this paper. HPF at the input terminal is achieved by operating the boost converter in discontinuous conduction mode.With carefully designed circuit parameters, soft switching on the power switches of the resonant inverter can be retained to attain high […]
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