关键词: 新型 Halbach 阵列, 3 段式磁体, 无铁心永磁直线电机, 推力密度, 推力波动

Abstract:

In order to solve the problem of synergistic optimization between thrust density and thrust ripple in coreless permanent magnet linear motor,this paper proposes a novel magnet pole structure with three-segment Halbach array. Based on finite element method,a multi-parameter coupled model was established considering the magnetization deflection angle, permanent magnet width, and height. Through an optimization strategy combining single-variable parameter scanning and genetic algorithm,the optimized structure was achieved,which no-load fundamental air-gap magnetic flux density was 0. 79 T. Compared with conventional two-segment and bilateral symmetric trapezoidal arrays, the improvements are 3. 1% and 13. 2%,respectively. Moreover,the thrust ripple is below 0. 071%. The results show the novel three-segment Halbach array effectively balances thrust density and thrust ripple suppression through optimized magnetic field distribution and coordinated parameter regulation.