三相PWM逆变器输出LC滤波器设计方法

An Design Approach of LC Filter Used to There phase PWM Inverter Output

为了使脉冲宽度调制(PWM)逆变器具有较好的输出交流波形,针对PWM逆变器输出交流波形中谐波次数较高的特点,采用二阶LC低通滤波器。从逆变器无功容量较小、传输效率较高、系统稳定性较好等角度,介绍了一种三相PWM逆变器输出交流LC滤波参数的设计方法。实际工程应用较好验证了该设计方法的可行性。

The orders of the harmonics of PWM inverter output voltage are very high.Two orders LC lower-pass filter was used to get better sinusoidal output waveform.A designed approach of LC filter for there-phase PWM inverter based on the minimum reactive capacity,the maximal transport efficiency and the better systemic stability of filter was proposed and verified by projects.