Permanent magnet drive on-load tap-changing switch

A permanent magnet drive on-load tap-changing switch, comprising a changing switch circuit, wherein the changing switch circuit comprises an odd-numbered tap-changing circuit and an even-numbered tap-changing circuit that are structurally identical, the tap-changing circuits comprise working contactors and dual-contact synchronous transition contactors consisting of primary contactors and secondary contactors, the working contactors are connected to the primary contactors through trigger transmitters and transition resistors;

• the primary contactor of a tap-changing circuit is connected to the secondary contactor of another tap-changing circuit through a high-voltage thyristor;
• the trigger transmitter is configured to provide a trigger current to the high-voltage thyristor connected with the secondary contactor of the same tap-changing circuit;
• characterized in that:
• the working contactors and the dual-contact synchronous transition contactors directly face moving contactors, the moving contactors are connected in parallel to each other, moving contactor permanent magnets are bijectively connected onto the moving contactors, the moving contactor permanent magnets directly face on the other extremity thereof a moving contactor driving mechanism, the moving contactor driving mechanism comprises a moving permanent magnet which moves to change the force acting on the moving contactor permanent magnets to allow the moving contactors to get contact with or depart from the working contactors and the dual-contact synchronous transition contactors.