Analysis of the influence of rotor structure on operating characteristics of motor actuator used in vacuum circuit breaker in distribution network

Aiming at the problem of the permanent magnet loosening and falling off in the operation of the motor actuator used in vacuum circuit breaker, this paper puts forward three improvement schemes of driving motor rotor, which are rotor convex embedded type, linear embedded type and inverted V embedded type. Numerical simulation method is used to analyze the influence of rotor structure on the operating characteristics of vacuum circuit breaker motor actuator. The results show that the improved structure can effectively avoid the loosening and falling off of the permanent magnet due to mechanical impact, and the reliability of opening and closing operation of vacuum circuit breaker is improved.