磁通反向横向磁场永磁直线电机优化设计

Optimal Design of Flux Reversal Transverse Flux Permanent Magnet Linear Motor

  • 摘要: 为达到提升推力和削弱定位力的目的,提出新型磁通反向横向磁场永磁直线电机(Flux reversal transverse flux permanent magnet linear motor, FR-TFPMLM)。首先,建立定子永磁型、双边动子结构样机的有限元模型,探索推力和定位力形成机理并运用改进的多目标优化方法确定气隙长度、定子齿高、永磁体厚和永磁体宽等结构参数。其次,基于皮尔逊相关系数法、标准化回归系数法及田口法对这些参数依次进行筛选,以得到降低定位力峰-峰值和提高空载反电势幅值的最优结构参数。最后,搭建样机平台进行参数测试,优化后的定位力峰-峰值下降了12.9%,空载反电势幅值提高了13.7%,推力提升了5.3%。仿真和实验均验证了新结构的可行性和多目标优化方法的有效性。

     

    Abstract: Aiming at the objective to enhance the thrust while reducing the detent force, a novel flux reversal transverse flux permanent magnet linear motor(FR-TFPMLM) is proposed. Firstly, a finite element model of a stator-permanent magnet, double-sided mover structure prototype is established, and the mechanisms of thrust and detent force are explored. The improved multi-objective optimization method is employed to select dimension parameters of air gap length, stator tooth height, permanent magnet thickness, and permanent magnet width. Secondly, the Pearson correlation coefficient method, standardized regression coefficient method, and Taguchi method are employed to screen the referred parameters for the purpose of reducing the peak-to-peak value of the detent force and increasing the amplitude of the back electromotive force(EMF) under no-load condition. Finally, a prototype platform is constructed and the experimental results show that the peak-to-peak value of the detent force is reduced by 12.9%, the back EMF amplitude is increased by 13.7%, and the thrust is increased by 5.3%, which verify the feasibility of the new structure and the effectiveness of the multi-objective optimization method.

     

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