关键词: Halbach 磁体阵列, 无铁心直线电机, 分段磁体, 遗传算法, 电机性能

Abstract: A coreless linear motor with a 3-slot 4-pole Halbach magnet array was investigated as the research object,
employing a combined approach of finite element modeling and genetic algorithm optimization to thoroughly investigate the
influence of the number of magnet segments, their width and the back iron material on motor performance. The research
results indicated that the back iron material and the number of magnet segments were critical factors determining the optimal
magnet dimensions. When the back iron employed magnetic material, increasing the number of magnet segments could
effectively enhance the performance of motor, including increasing average thrust, reducing thrust ripple and lowering
leakage flux. The attractive force between two sides of U-shaped secondary and mechanical strength was elevated, leading
to increased manufacturing costs and diminished economy effeciency. Therefore, selecting the optimal design scheme in
practical applications requires a balanced consideration of performance and economy efficiency.