Analysis on similarity of permanent magnet brushless DC motor operating mechanism for high-voltage disconnecting switch

The permanent magnet motor, which is applied in the high voltage disconnecting switch, used for reducing the VFTO in the operation of disconnecting switch and enhancing the operating performance, and therefore achieves the opening and closing operation and brings quicker response ability and control performance, is presented. The structure and the parameters of the motor are designed according to the characteristics requirement of 550kV GIS disconnecting switch. The dynamic mathematical model of the motor is developed and the dynamic performance is carried out by using the transient finite element method. The simulation results verify the reasonable of motor design and gain the characteristic curves. The analysis results indicate that the permanent magnet motor have an excellent performance in the sense that it gives an opening or closing speed that meets the requirements of the disconnecting switch. Furthermore, it serves to provide a theoretical base for designing that permanent magnet motor applied in disconnecting switch.