微机GTR-PWM型变频调速系统

An Introduction to Microcomputer Control of A. C. Motor Speed Regulation System

一、前言随着微机的广泛应用和交流调速技术的迅速发展,采用微机控制的PWM型变频调速系统已成为近年来十分引人注目的研究课题。目前,一般晶闸管变频调速系统硬件都很复杂,因而设计,制作和调试比较困难,可靠性也比较差。采用大功率晶体管组成的PWM型变频调速系统并用微机控制就可大大减化系统的硬件设备,提高运行的可靠性;采用微机控制还可以同时改变输送到电动机定子绕组的电压大小、波形和频率,灵活地选择不同控制方案的调节器参数和控制量以达到提高系统性能指标缩短调试过程的目的。

Tradtional thyristor frequency converter is very heavy and troublesome in site and block construction. of late year. a Kind of GTR and PWM Inverter that is developing can overcome the defect. This paper introducing microcomputer control of A. C. Motor system which consists of hardware design of digital controller, software and the results of exper-iment. It is the feasible and simple way for us to identify system model, and also of praetical use.