初级分段不连续型直线电机定位力分析与参数优化

以一种应用于环形线运输系统的初级分段不连续型直线电机为研究对象。分段不连续型初级结构的优势在于节约成本、减小损耗且电机系统更具柔性化，但此结构导致动子在段间切换受到很大端部力，造成电机运行时推力波动较大。针对该问题，提出了一种次级辅助极与初级端齿相结合的优化方案。分析电机在空载运行时所受的定位力并进行解析，对比动子在初次级耦合以及段间切换这两种情况下所受的定位力。首先对电机的主要结构参数进行优化，结合响应面法建立多目标响应面模型；然后通过遗传算法进行寻优，通过仿真对优化前后的定位力进行对比；最后基于实体样机进行测试验证，结果表明添加辅助结构下的电机模型可有效抑制定位力与推力波动。

Detent Force Analysis and Parameter Optimization of Primary Segmented Discontinuous Linear Motor

A primary segmented discontinuous linear motor applied to the annular line transportation system is taken as the research object. The merits of the segmented discontinuous primary structure include cost savings, reduced losses, and a more flexible motor system, but this structure results in a large end force on the mover switching between segments , which results in large thrust fluctuations during motor operation. To solve this problem, an optimization method combining the secondary auxiliary pole and primary end teeth is proposed. The detent force of the motor during no-load operation is emulated and analyzed, and the detent force on the mover in the two cases of primary coupling and switching between segments are compared. Firstly, the main structural parameters of the motor are optimized, the multi-objective response surface model is established by combining the response surface method. Secondly, optimization is performed by genetic algorithm, and the detent forces before and after optimization are compared by simulation; Finally, a test verification based on the prototype is carried out, and the results show that the motor model with an auxiliary structure can effectively suppress the detent force and thrust fluctuation.