Dynamic performance analyze of swing angle torque permanent magnet motor under different structure and winding parameters
A swing angle torque permanent magnet motor operating mechanism is presented which applied in the high voltage circuit breaker. The motor is a permanent magnet motor with limited angle and only working in the starting stage. Based on the operation requirement of high voltage circuit breaker, the dynamic performance of driving motor operating mechanism is achieved by employing the finite element method. The parameters behavior of driving motor is obtained under the different structure and winding parameters, such as the length to diameter ratio, turns and line width ratio, thickness of permanent magnet, pole arc coefficient, length of air-gap and operating voltage. The results indicate that the motor operating mechanism have a good mechanical characteristics and reach the operation of high voltage circuit breaker.
Design of a Novel Permanent Magnet Brushless DC Motor-Driven Operating Mechanism for High-Voltage Circuit Breaker and Its Dynamic Simulation
To improve the reliability of high-voltage circuit breakers,a novel operating mechanism,i.e.,a limited rotating angle permanent magnetic brushless DC motor-driven operating mechanism,is developed.According to the requirement to mechanical characteristic of 40.5 kV vacuum circuit breaker,the structure of the driving motor and its main parameters,including electric load,magnetic load,pole number,pole-arc coefficient and so on,are designed.The dynamic characteristic of the designed prototype is simulated by finite element method.Simulation results show that the design of the permanent magnetic brushless DC motor is reasonable,its mechanical characteristics,such as electromagnetic torque,current,rotating speed and rotating angle,etc.
Investigation on the Controlling Techniques of Moving Contact Behaviors for Vacuum Circuit Breaker with Permanent Magnetic Actuator
The moving contact travel behavior influenced the interrupting capacity of a circuit breaker.This paper presents a new modified method to control the operating characteristic for permanent magnet(PM) type circuit breaker.The travel curve of moving contact can be controlled by controlling the current in open and close coil.The result of laboratory tests and the availability are presented.