脉宽调制逆变器—异步电动机系统电压、电流的计算机模拟

Computer Simulation of Voltage and Current in PWM Inverter-Asynchronous Motor System

交—直—交电压型脉宽调制逆变器是牵引领域中很有发展前途的一种逆变器。本文对该种逆变器—异步电动机系统建立了一个通用的数学模型,它具有运算速度快、精度高及对计算机内存容量要求低的特点。从原则上来说可在系统的整个调频范围内,在微型计算机上对任何稳态工况时的逆变器输出电压、电机定、转子电流的基波及谐波分量进行分析,从而为该种系统的研制和改进提供了一个有力的工具。

The PWM voltage type inverter in A.C.-D.C.-A.C. drive system is of great perspective in traction application. A general mathematical model is set up in this paper for this inverter asynchronous motor system, Which is characterized by rapid operation, high precision and requiring less internal storage capacity of computer. In principle, analysis can be made by microcomputer, within the frequency regulation range of the syster, on the principal wave and harmonic component of the output voltage in the inverter and the currents in the asynchronous motor stator and rotor in a stable mode. It thus becomes a powerful means for the development and improvement of this system.