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.
Rare Earth Permanent Magnet Synchronous Motor CAD System Based on Engineering Database
This paper states the development of a CAD system of the rare earth permanent magnetic synchronous motor(REPMSM) designed by using Borland C++Builder 6.0,the OPP,and database technology.The magnetic field in the motor is analysed by finite element method and hybrid particle swarm optimization(HPSO) is applied to optimum design.The CAD system runs under Chinese Windows and it is easy to operate with friendly interface.The CAD result is compared with the experimental data,the result is consented.
CALCULATION AND ANALYSES OF PERMANENT MAGNETIC ACTUATOR DYNAMIC BEHAVIOR
The study of dynamic behavior of permanent magnetic actuator (PMA) involves solution of an electrically, magnetically and mechanically coupled problem. Based on the establishment of mathematic model, this paper solves theelectric circuit equation, electromagnetic equation andmechan-ic equation simultaneously to obtain the PMA dynamic behavi-or by adopting four-order Runge-Kutta method and finiteelement method. In the calculation, both the nonlinear materialproperties and the magnetic leakage are considered. By calcu-lating dynamic behavior of vacuum circuit breakers equipped with bistable and monostable PMA respectively, a few curves such as currentacross the coil and movable contact velocity are obtained. And related experiments are also carried out. In the test, the open and closing speed of contacts are measured and the current curves inopen and closing coil are also obtained. The comparison oftheoretical and experimental results shows that the calculation results are correct and reliable.