关键词: 聚磁Halbach少极差磁齿轮, 双控制变量法, 优化设计, 转矩密度

Abstract: Magnetic gear with small poles difference (MGSPD), which has no contact or wear, high torque density and high transmission ratio, is expected to replace the existing mechanical reducer gearbox in the industrial application, and realize the high reliability and longevity transmission. To improve the torque density and make permanent magnets easier to install at the same time compared with the surface mounted MGSPD, the flux focusing Halbach MGSPD was proposed. Through finite element software, the relationship between structural parameters and output torque was analyzed by dual control variable method. According to the analysis, the initial design was optimized. The results show that,after optimization the static torque is increased by 44%, which can reach 875 N·m, torque density is 310 kN·m/m³, which is 72% higher than surface mounted MGSPD.

Key words: flux focusing Halbach magnetic gear with small poles difference(FFHMGSPD), dual control variable method, optimal design, torque density