自动门
自动门:水型有刷直流电动机理论基础
发布时间:2013/10/2
自动门讯:
水型有刷直流电动机理论基础
    一般的有刷直流电动机它由定子和转子两大部分组成。其中
   定子是电动机的静止部分,它的主体是机
座、磁极和绕在磁极上的绕组(微型永磁
式直流电动机则采用永久磁钢作磁极的)、
电刷架与电刷、轴承和前后端盖等。转子
是电动机的转动部分,通常称为电枢。它
的主体是轴、电枢铁芯、电枢绕组、换向
器和风扇等。直流电动机结构的主要特征
是具有换向器和电刷,换向器由许多楔形
钢片围叠成空心的圆柱形,片间用云母片
(或其他垫片)绝缘,每两片与一个电枢线
圈相连;换向器装在转轴上,外表面与有
弹簧压着的电刷相接触。换向器与电刷的
作用,一方面是使旋转着的电枢绕组能与
静止的外电路(电源)相通,以引入直流
电流;另一方面是为了使线圈中的电流方
向能随线圈转入相反磁极时而同步反向。
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