The invention relates to the field of lifting electromagnets, in particular to a lifting electromagnet follow current protection circuit which comprises a three-phase rectification direct-current power source, an electromagnet, a follow current protection circuit and a main contactor, wherein the three-phase rectification direct-current power source is connected with the electromagnet in series, and the electromagnet is connected with the main contactor in series. The electromagnet is connected in parallel with the follow current protection circuit, and the follow current protection circuit comprises a follow current control contactor, a diode and a resistor which are sequentially connected in series. According to the lifting electromagnet follow current protection circuit, the arc discharge problem of a contact of an electromagnet contactor is relieved, the service life of the contactor is greatly prolonged, therefore, the maintenance cost is reduced, the fault rate of the contactor is reduced, and a guarantee is provided for safe lifting of the lifting electromagnet.

    本发明涉及起重电磁铁领域,尤其涉及一种起重电磁铁续流保护电路,包括三相整流直流电源、电磁铁、续流保护电路和主接触器,所述三相整流直流电源串联连接所述电磁铁,所述电磁铁串联连接所述主接触器,所述电磁铁并联连接所述续流保护电路,所述续流保护电路包括依次串联连接的续流控制接触器、二极管和电阻器。本发明的起重电磁铁续流保护电路,减轻了电磁铁接触器触点的拉弧问题,极大的延长了接触器的寿命,从而减少了维修成本,同样也降低了接触器的故障率从而为起重电磁铁安全吊运提供了保障。


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    Title :

    Lifting electromagnet follow current protection circuit


    Additional title:

    一种起重电磁铁续流保护电路


    Contributors:
    LIU CHANGJIU (author) / ZHANG ZHAOYU (author) / DUAN YUFENG (author) / JIANG HONGWEN (author)

    Publication date :

    2021-12-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    H01F MAGNETS , Magnete / B66C Krane , CRANES



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