摘要
异步电动机在软起动过程中由于自身阻抗角的变化,导致主电路中晶闸管的触发角、电流持续角、晶闸管反向导通角等变化都是一个动态的过程,并且经常导致在软起动过程中不可靠触发。文章在详细分析了这种不可靠的原因的基础上,提出了一种有效的措施,实践证明这种方法是可行的,并且具有很强的实用价值。
The triggering angle,the current duration and the reverse conducting angle of the thyristor in the main circuit often change,which is due to change of the impendance angle of the asynchronous motor during the soft starting period.And it often brings about the unreliable trigger.In this paper,one method of overcoming this phenomenon is proposed.This method is proved to be correct and useful in the practical application.
出处
《仪表技术》
2010年第4期56-57,67,共3页
Instrumentation Technology
关键词
软起动器
晶闸管触发
触发区间
导通角
soft starter
SCR trigger
triggering interval
conduction angle
