The Design Of Three-phase Voltage Source PWM Rectifier Applied To Electric Vehicle Charging System

Nowadays, in most electric vehicle dc charging system, diode rectifier and phase-control thyristor rectifier are commonly used. But for the rectifiers,low power factor and high harmonic pollution is a big problem?PWM rectifier has been paid great attention for its low harmonic,high power factor and energy bi-directional flow and has got great development?in the thesis,we focus our research on the design of three-phase voltage source PWM rectifier applied to electric vehicle dc charging system?In this thesis,Firstly we analyze the principle of three-phase voltage source PWM rectifier and establish the mathematical in static three-phase coordinate and in rotary two-phase coordinate,and These coordinate transformation are validated in the MATLAB simulation environment?Secondly to choose the right control strategy for three-phase voltage source PWM rectifier, we put research emphasis on the popular direct feedback decoupling control and the SVPWM control strategy and the formula to calculate the PI parameters and SVPWM parameters is achieved?and the right control strategy for three-phase voltage source PWM rectifier are validated In the MATLAB? Based on the theoretical analysis,hardware circuits and software of three-phase voltage source PWM rectifier are designed?the designed can make the power factor reach over 0.9, and make the output voltage fluctuating range within ±0.4V,and make the output power up to 10kw?Finally The system is simulated in the MATLAB/SIMULINK and the simulation waveforms is given out ?the methods which combined theoretical analysis with simulation is used for validating the validity of model ? Through comparison between theory proof and simulation,We find the design is right...