| 摘要 |
A permanent magnet drive on-load tap-changing switch comprising a changing switch circuit. 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 (K1/K2) and dual-contact synchronous transition contactors (k1 and k1'/k2 and k2') consisting of primary contactors (k1/k2) and secondary contactors (k1'/k2'). The working contactors and the dual-contact synchronous transition contactors directly face moving contactors (1). The moving contactors are connected in parallel to each other. Moving contactor permanent magnets (2) 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 moves the permanent magnets. The present invention is structurally simple and convenient to use, obviates the need for a high-speed mechanism, implements changing by means of direct actions of the contactors, operates at high speed and reliably, has a low failure rate, an extended service life, and value for widespread use. |
