摘要
阐述了高压异步电机直接起动的缺点,介绍了一种以intel80C196微处理器为核心的高压异步电机的软起动器,对控制器的电路结构及软件进行了分析。该控制器主电路是一个由晶闸管控制的限流变压器,高压电机通过变压器的高压绕组接到电网上,而变压器的每一组低压绕组并接一对反并联的晶闸管,通过控制晶闸管的触发角可以连续改变低压绕组的电压,从而连续改变电机的定子两端电压,使高压电机平稳可靠地起动。
This paper expresses the disadvantages of direct on-line starter for high-voltage asynchronous motor and introduces a kind of high-voltage soft starter based on intel80C196 single-chip microcomputer,analyzes its main circuit and software.The main circuit of the controller is a transformer controlled by SCR.High-voltage asynchronous motor is connected with the electric net by the transformer′s high-voltage winding. The low-voltage winding is connected with anti-parallel SCR.The voltage of low-voltage winding is continuously changed by controlling firing angle of SCR,then the voltage of motor′s stator is continuously changed. The motor can start steadily and reliably.
出处
《电力电子技术》
CSCD
北大核心
2005年第3期59-60,共2页
Power Electronics
关键词
高压
电动机
软起动/限流变压器
high voltage
motor
soft starter / current-limit transformer
