广州3TB39010XM0西门子接触器供应商 3TB42220XG0

80年代后，各国研究交流接触器电磁铁的无声和节电，基本的可行方案之一是将交流电源用变压器降压后，再经内部整流器转变成直流电源后供电，但此复杂控制方式并不多见。
真空接触器：真空接触器是接点系统采用真空消磁室的接触器。
半导体接触器：半导体接触器是一种通过改变电路回路的导通状态和断路状态而完成电流操作的接触器。
永磁接触器：永磁交流接触器是利用磁较的同性相斥、相吸的原理，用永磁驱动机构取代传统的电磁铁驱动机构而形成的一种微功耗接触器。3TH40220XL2
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接触器的工作原理是：当接触器线圈通电后，线圈电流会产生磁场，
产生的磁场使静铁芯产生电磁吸力吸引动铁芯，并带动交流接触器点动作，常闭触点断开，常开触点闭合，两者是联动的。当线圈断电时，电磁吸力消失，衔铁在释放弹簧的作用下释放，使触点复原，常开触点断开，常闭触点闭合。直流接触器的工作原理跟温度开关的原理有点相似。
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