Analysis and design of a high-speed permanent magnet characteristic actuator using eddy current effect for high-voltage vacuum circuit breaker


This study proposes a high-speed permanent magnet actuator (HSPMA) for top-voltage vacuum circuit breaker (VCB). The HSPMA includes mainly of an eddy current repulsion force actuator and a permanent magnet (PM) actuator. The structural saliency of HSPMA is described and its management principle is elaborated in details. Finite element technique is used and the eddy current is included in the computation of the electro-magnet fields of the HSPMA. The system equations, that couples the magnet field to circuit and mechanical equations, are engineered in ANSOFT Maxwell and Circuit Editor during this study of the creating and breaking procedures of the HSPMA. The simulated characteristics show the look meets the necessity of the high-voltage VCB. The optimal thickness of the eddy current plate is 10 mm. The capacitor additionally has an economic optimal value of 10,000 µF. The simulated results indicate that the HSPMA contains a sound characteristic in comparison with circuit breakers with solely PM actuator.

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