Abstract:
A three-dimensional geometric model of anode contact of vacuum circuit breaker is established and analyzed in this paper. To analyze the influence of electrode rotation on vacuum arc and anode thermal process, a physical model of phase transformation process is established for the melting and evaporation of anode surface. The solid-liquid mixing area is treated by the description method of porous media, and the numerical simulation of anode thermal process is carried out, concluding that with the increase of time, the anode surface temperature is increasing, molten pool is developing, molten pool depth is deepening, in addition, with the increase of electrode speed, the highest temperature on the surface of the contact and the size of the molten pool are reducing, and the temperature distribution is more uniform. This simulation model can be an academic foundation to research the breaking capacity of circuit breaker.