关键词: 直线电机, 磁悬浮, 低定位力, 交替极, 响应面法, 遗传算法

Abstract: As the level of linear motor technology increases, the application scenarios for linear motors are gradually expanding. These includes the use of linear motors in traditional rail shield door machine. The traditional rail shield door machine drive system uses a rotary motor drive method, which requires a complex transmission mechanism and is prone to large noise and mechanical losses. In this paper, a new type of suspended linear motor is adopted to drive the shield door, and the structural parameters of the motor are screened out using Taguchi to find out the highly sensitive structural parameter combinations, while the response surface method is used to establish the corresponding response surface functions for the screened structural parameter combinations, and finally the optimal design of the linear motor is carried out by multiobjective optimization genetic algorithm to obtain the optimal structural parameter combinations, which finally proposes a linear motor with low positioning force and low thrust fluctuation. The comparison of the performance parameters of the linear motor before and after optimization shows that the optimized positioning force and rated thrust are significantly improved. This proves that the optimized solution is feasible.

Key words: linear motor, magnetic levitation, low positioning force, alternating pole, response surface methodology, genetic algorithm