高转矩密度的聚磁Halbach少极差磁齿轮设计与优化

Design and Optimization of High Torque Density Flux Focusing Halbach Magnetic Gear with Small Poles Difference

少极差磁齿轮具有无接触无磨损、转矩密度高、传动比高等优点,有望在工业应用领域替代现有机械减速箱,实现高可靠高寿命传动。在传统表贴式少极差磁齿轮结构的基础上,为提高转矩密度同时便于磁钢安装,提出聚磁Halbach少极差磁齿轮,通过有限元分析软件,采用双控制变量法分析了新型拓扑的各结构参数与输出转矩的关系,根据分析结果对初始设计方案进行了优化。结果表明,在总体积不变的条件下,优化后聚磁Halbach少极差磁齿轮静态扭矩较优化前提高了44%,可以达到875 N·m,静态转矩密度达310 kN·m/m^(3),相比表贴式结构,转矩密度提高了72%。

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/m^(3),which is 72%higher than surface mounted MGSPD.