Permanent magnet drive on-load tap-changing switch

A permanent magnet drive on-load tap-changing switch, comprising:

• a changing switch circuit, the changing switch circuit comprising an odd-numbered tap-changing circuit and an even-numbered tap-changing circuit that are structurally identical;
• the odd-numbered tap-changing circuit and the even-numbered tap-changing circuit comprising working contactors and dual-contact synchronous transition contactors consisting of primary contactors and secondary contactors;
• the working contactors being connected to the primary contactors through trigger transmitters and transition resistors;
• a primary contactor of a tap-changing circuit being connected to a secondary contactor of another tap-changing circuit through a high-voltage thyristor;
• a trigger transmitter being configured to provide a trigger current to the high-voltage thyristor connected with the secondary contactor of a same tap-changing circuit, wherein:
• 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 to the moving contactors;
• the moving contactor permanent magnets directly face, on an other extremity thereof, a moving contactor driving mechanism, the moving contactor driving mechanism comprising a moving permanent magnet which moves to change a 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.