The Experts below are selected from a list of 15 Experts worldwide ranked by ideXlab platform
Wang Xia - One of the best experts on this subject based on the ideXlab platform.
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Six-phase Three-level Grid Connection Inverter and its Control Method
Electrical Automation, 2015Co-Authors: Wang XiaAbstract:In view of imbalance of the neutral point potential with the three-phase NPC inverter( Neutral Point Clamped Inverter),this paper designs a six-phase three-level grid connection inverter and discusses the structure of the main circuit and its control method. First,through an analysis of the structure of the main circuit,it explains the working principle of the six-phase three-level inverter,showing that the inverter does not use the Flywheel Diode and divider capacitor,thus avoiding imbalance of the neutral point potential. Second,it discusses the control method for the six-phase three-level inverter and presents SVPWM( Space Vector Pulse Width Modulation) for the control of the six-phase three-level inverter. Furthermore,MALTAB / Simulink simulation is completed,and a comparison is made between the inverter and the NPC-type inverter. Finally,the feasibility of the method is verified through a 1 k W physical model experiment.
Zhang Wen-h - One of the best experts on this subject based on the ideXlab platform.
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Method for Solving the Composed Problem of Photovoltaic and Commercial Power
Research and Exploration in Laboratory, 2014Co-Authors: Zhang Wen-hAbstract:In the hybrid power system based on double-input buck converter and power management strategy which has been put forward,we can keep the system working under suitable mode.But when the two IGBT switches at the same time,due to the reverse bias voltage,the Flywheel Diode will cut off.The commercial power current must flow through the photovoltaic that will affect measurement of Photovoltaic current seriously.Interleaved dual-edge modulation and inter-lock can solve the problem,theoretical analysis will be listed to prove the consistency of the two method.The simulation results of interleaved dual-edge modulation based on Matlab /Simulink model have confirmed the effectiveness.
H. Haga - One of the best experts on this subject based on the ideXlab platform.
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A novel converter topology which is suitable for high output current
2003Co-Authors: M. Hayashi, H. HagaAbstract:The power demand for microprocessors increases steadily; DC/DC converters are required to have high current capability and lower operating voltage. This paper describes a novel converter topology named "current flip flop converter" (CFFC), that is suitable for low output voltage and high output current. CFFC is based on the forward converter, but the output inductor and the Flywheel Diode are placed on the primary circuit. This makes the current through the inductor and the Flywheel Diode of CFFC smaller than that of the forward converter. In addition, the number of parts on the secondary circuit is minimized. This is the reason why CFFC is suitable for high output current. The converter topology, operation, experimental results of the 150 W prototype converter is described. We obtained 83.7% efficiency of the prototype under the condition of DC48 V input and 1.5 V 100 A output.
Yangguang Yan - One of the best experts on this subject based on the ideXlab platform.
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coupling inductance dual buck full bridge inverter
2008Co-Authors: Zhilei Yao, Lan Xiao, Yangguang YanAbstract:The invention relates to a coupling inductor dual buck full-bridge inverter, belonging to an electronic inverter. The inverter is composed of two buck circuits. One buck circuit comprises a first power switching tube (S1), a second power switching tube (S2), a first Flywheel Diode (D1), a second Flywheel Diode (D2), a first coupling inductor primary winding (L1A), a first coupling inductor secondary winding (L2A), a filtering capacitor (Cf) and a load (RL); and the other buck circuit comprises a third power switching tube (S3), a fourth power switching tube (S4), a third Flywheel Diode (D3), a fourth Flywheel Diode (D4), a second coupling inductor primary winding (L1B), a second coupling inductor secondary winding (L2B), a filtering capacitor (Cf) and a load (RL). The inverter circuit adopts the coupling inductor to effectively reduce volume and loss of magnetic elements and improve inversion efficiency; and solves the direct connection of the power tube of the bridge arm of the bridge inverter, so as to improve the reliability.
Alireza Ahadpour Shal - One of the best experts on this subject based on the ideXlab platform.
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A New MATLAB GUI Tool for Instructing Operation of Power Electronic Rectifiers
EMITTER International Journal of Engineering Technology, 2019Co-Authors: Mohammad Reza Modabbernia, Seyed Yaser Fakhrmoosavi, Alireza Akoushideh, Alireza Ahadpour ShalAbstract:This study seeks to present an interactive tool, which exploits the GUI related abilities in MATLAB, to investigate power electronic rectifiers operation. The present paper aims to show a flexible and extendable environment for steady state simulation of ideal controlled, uncontrolled, single-phase and three-phase power electronic rectifiers. This is accomplished at the presence of R, L and E loads with or without a Flywheel Diode. The easy application of our tool makes it feasible to be used by the teacher in the classroom. Also its short running time and the PSpice output netlist make it a remarkable alternative to the MATLAB PowerSim toolbox and PSIM software for studying ac-dc converters. Furthermore, in this paper some basic equations were introduced to analyze single and three-phase rectifiers. Because these equations are common between ac-dc converters, analyzing the different types of rectifiers will be easy for the students. The penultimate issue refers that, the proposed program can cause a variety of single and three phase controlled rectifiers accompanied by various combinations of R, L and E loads to be simulated. Ultimately, obtained results are compared to another well-known simulator’s such as PSpice to verify their accuracy.