交流变频调速系统的一种通用数字仿真方法

A General simulation Method of AC Variable Speed System

提出了一种由逆变器驱动的交流调速系统的通用数学模型和仿真方法。该方法不仅适用于异步电动机，也适用于同步电动机，并且适用于任意一种ＰＷＭ调制模式。采用该模型，只要按定义给出触发信号逻辑变量值，输入电机参数、调制规律以及控制方案即可得到电机稳态及暂态仿真结果，特别是对缺相等触发失误状态也可进行仿真。因此，可用此模型来开发研究交流变频调速系统仿真平台。采用本方法仿真得到的波形与实测波形基本吻合。

This paper provides a general mathematical model and simulation method of AC variable speed system driven by inverter, which can be used with any PWM mode and for induction motor or synchronous mo tor. The steady and transient simulation results can be got only by inputting pulse signal logical variable val ues, the motor parameters, madulation mode and control strategy, particularly for the situation of losing pulse and switch pulse error. So, it can be used to develop a simulation software plat of AC variable speed sys tem. The simulation waveforms using this method are compatible very well with the measured waveforms.