摘要
从永久磁铁的两种工作状态出发 ,说明了永磁机构中永久磁铁的工作点位于回复线上 ,且钕铁硼永磁的祛磁曲线几乎是一条直线 ,它的回复曲线与祛磁曲线基本重合 ,磁感应强度具有重复性。论证了在单线圈式永磁机构中 ,永久磁铁不会发生退磁现象。
Starting from the two operational states of permanent magnet, this article explains that the working point of permanent magnet in the permanent magnet actuator is sited on the reversional curve, and the demagnetized curve of NFeB permanent magnet is approximately in a straight line,and its reversional curve coincides with the demagnetized curve, moreover,its flux density has repeatability. It is proved that the demagnetization wouldn't happen in the permanent magnet actuator with singlecoil during the operation of circuit breaker.
出处
《高压电器》
CAS
CSCD
北大核心
2002年第4期39-41,51,共4页
High Voltage Apparatus
关键词
永久磁铁
祛磁曲线
回复曲线
工作点
permanent magnet
demagnetized curve
reversional curve
working point
