低谐波低纹波整流器的研究与设计

Research and Design of a Rectifier of Low Harmonic Low Ripple

整流器被广泛应用于各种电力电子设备,其谐波问题日益受人们重视,设计谐波注入损耗小且输出纹波小的整流系统迫在眉睫。本系统的电压外环采用响应速度快、超调量小、动态性能好的智能型PI调节器,电流内环采用普通PI调节器,保证系统较强的鲁棒性。市电输入前加了EMI滤波器,输出电压采用切比雪夫滤波和中值平均的数字滤波,达到谐波低与纹波低的效果。

As rectifier is widely applied in all kinds of power electronic devices, the harmonic problem increasingly got attention by people, meanwhile, design of harmonic infuse wastage and small output ripple rectifier system is immi- nent. In this system, the voltage loop adopts intelligent PI adjuster, which has response speed, small overshoots and dynamic properties, and the current loop adopts common PI adjuster, which guarantee strong robustness. The utility uses the EMI filter before input, and output voltage adopts Chebyshev filter and median averhge digital filter, which achieve effects of low harmonic and low ripple.