数字式三相变频器的设计

Design of Digital Three-phase Frequency Inverter

文章介绍了三相变频器设计的一种方法,解决了三相正弦波相位问题,实现大范围频率可调,采用U/f=C的正弦脉宽调制(SPWM)控制方式,整机电路较容易完成,能满足一般传动的平滑调速要求。

The essay introduces a method to achieve a three-phase frequency inverter which solves the problem of the phase of three-phase sinusoidal wave simply. And the design makes the frequency adjustment range to be wider. The voltage is directly proportional to frequency by using this control way. The whole circuit is easy to achieve and the inverter can meet the requirement of normal drives to adjust speed smoothly.