Implementation and Improvement of the Permanent Magnet Brushless DC Motor Operating Mechanism for 126kV Vacuum Circuit Breaker

The brushless direct current (BLDC) motor has recently got a great attention from industries it has high speed and strong structure. However, the specifications of the motor appropriate for applications need high speed. In this research work, a detailed method of permanent magnet brushless direct current (PMBLDC) motor operating mechanism on surface-mounted rotor structure was presented and simulated. Two models; new and old were demonstrated. The numerical form of a motor mechanism was recognized and the dynamic load features, as well as a corresponding instance of the rotor, load operation, peak torque, torque ripple, low inertia, and dynamic counter-force were investigated. The gross closing process and opening process last 80. 6ms and 60. 47ms, respectively, which completely meet the execution and consistency with the technical parameters for 126kV vacuum circuit breaker (VCB). The motor is numerically computed by Maxwell 2D design and analytical calculation applied to the building a motor mechanism and optimizing all design parameters to enhance the closing and opening moving contact of 126kV VCB.