CAJ | 학술논문

为了减小异步电动机起动过程中对电网的冲击、消除传统降压起动设备的有级触点控制对异步电动机的冲击、改善异步电动机的起动特性，基于电力电子技术对电动机软起动进行了研究。软起动装置是基于三相交流调压技术，通过改变晶闸管的触发角以调节定子两端的电压来实现的。采用双闭环控制的三相交流调压电路设计了50kW异步电动机软起动装置。内环电流控制及外环电压控制采用PI控制，实现了自动调节电动机起动电流，不但限制了电流，又使端电压平稳上升，实现了交流异步电动机平稳软起动。
위료감소이보전동궤기동과정중대전망적충격、소제전통강압기동설비적유급촉점공제대이보전동궤적충격、개선이보전동궤적기동특성，기우전력전자기술대전동궤연기동진행료연구。연기동장치시기우삼상교류조압기술，통과개변정갑관적촉발각이조절정자량단적전압래실현적。채용쌍폐배공제적삼상교류조압전로설계료50kW이보전동궤연기동장치。내배전류공제급외배전압공제채용PI공제，실현료자동조절전동궤기동전류，불단한제료전류，우사단전압평은상승，실현료교류이보전동궤평은연기동。
In order to reduce the shock of the asynchronous motor start-up on the power grid, to eliminate the impact of traditional voltage dropping trigger with stepped contact on asynchronous motor, and to improve the starting characteristics of asynchronous motor, the soft starting techniques of asynchronous motor have been researched based on the power electronics technology. The soft starting of asynchronous motor is accomplished by using three-phase voltage adjustment to change the triggering angle of the thyristor, and further to adjust the stator voltage. The soft starting device of 50kW asynchronous motor is designed by using double closed-loop three-phase AC voltage regulating circuit. The starting current is automatically adjusted by the PI internal ring current and out ring voltage controls. Not only the starting current is restricted, but also the terminal voltage is increased gradually, thus the smoothly starting of asynchronous motor is realized.