关键词: 永磁同步直线电机, Halbach 阵列, Kriging 模型, 多目标优化, 推力波动优化

Abstract: For applications like precision machine tools requiring high thrust quality of drive motors,existing Halbachtype coreless linear motors struggle to balance increasing average thrust and suppressing thrust ripple. To address the issue,this paper proposes a coreless linear motor with a Halbach array of variable-thickness permanent magnets,aiming to balance thrust magnitude and improve ripple quality. For the proposed motor model,a Kriging surrogate model is built using Latin hypercube sampling. With the goals of increasing average thrust and reducing thrust ripple, comprehensive performance optimization of the new-structure motor is conducted via genetic algorithm. This paper carries out modeling of the motor ' s magnetoelectric model, thrust performance simulation, and optimization with the NSGA-II genetic algorithm. Simulation results show that the motor's average thrust increases by 3. 7%,thrust ripple decreases by 42%,and the back electromotive force waveform is closer to an ideal sine wave. This verifies the effectiveness and feasibility of the proposed non-equalthickness Halbach-type coreless linear motor and its optimization method in reducing thrust ripple and boosting average thrust.

Key words: linear permanent magnet synchronous motor, Halbach array, Kriging model, multi-target optimal design, thrust ripple optimization design