Research On The PWM Rectifier Control System

In the application field of power electronics,rectifiers have been widely used in most covertors,such as power supply and inverters.Most of these rectifiers are made up of power electronic devices,which can import in harmonic pollution and low power factor to the electric network.In order to solve these problems caused by rectifier,this dissertation foucus on the PWM rectifier.Due to the merit of bi-direction,the PWM rectifier not only can output the adjustable DC voltage,but also can reduce the harmonic current and improve the power factor,and the PWM rectifier has become a highlight in the field of power electronics.This dissertation emphasized on the current control method of PWM rectifier control system,which plays an important part in this system.Two methods have been present,the one is indirect current control,the other is direct current control.Based on the theory of the PWM rectifier,the mathematical model of PWM rectifier has been present.The direct control simulation model has also been present in this dissertation,which enduced some results and waveforms.The PWM rectifier system base on TMS320LF2407 dsp controller has been designed ,and corresponding software has also been designed to realize the loop voltage source rectifier system(VSR).The main circuit is made up of IGBT,and the current control method is indirect control methed.The experiment result verify the validity scheme ,the low current harmonic pollution and high power factor have been realized.