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.
Parameter optimization of the stator winding process for process capability improvement
A stator mainly consists of stator core and windings. These important components are used to generate the magnetic field for rotating the motor. In stator assembly process, the nonconforming products occurred were mostly due to the stator winding machine, especially when the Direct Current Resistance (DCR) value of each stator was concerned. A preliminary study was carried out to investigate the primary causes. The results showed that the appropriate setting values of the starting and ending positions of winding on the X-axis and the copper wire tension were still unknown. Design of experiment technique was applied to figure out the combination of these parameters that jointly optimize the DCR. Then, these levels were implemented in the winding process and data were collected to evaluate the process capability. The results showed that Cp and Cpk indices had been increased from 1.07 and 0.88 to 1.94, and 1.92, respectively.
RESEARCH ON MODEL OF A NEW SHORT-STROKE LINEAR MOTOR AND ITS EXPERIMENTS
The special structure and working principle of a novel short stroke linear DC motor with permanent magnets are presented. Based on it, using theory analysis method with practice application to deduce the coupling relation between mechanical and electromagnetic equations, establish a mathematical model, analyse the parameters affecting the motor dynamic performance and show the block diagram of the linear motor model and transform functions. In order to evaluate its performance and derive its quantitative mathematical model, the model parameters were tested and analyzed, the experiments of the short stroke linear motor was given, experimental results were verified by model equations. These show its effectiveness.