高转矩密度磁力齿轮的拓扑结构设计与性能比较

Topology Design and Performance Comparison of High Torque Density Magnetic Gear

永磁行星齿轮和同轴永磁齿轮是两类具有不同拓扑结构和运行原理的磁力齿轮,采用定量设计比较法设计了具有相同有效体积和永磁体用量的上述两类磁齿轮,并通过有限元分析法对二者的转矩传递性能进行比较研究。研究结果表明,永磁行星齿轮较同轴永磁齿轮有更高的转矩密度和更低的转矩脉动。此外,由于永磁行星齿轮具有更加灵活的运行模式,并且能实现功率分流,使其在混合动力汽车领域有很好的应用前景。加工了一台永磁行星齿轮样机,并搭建试验平台进行了相关的试验,结果表明了该拓扑结构的有效性。

Magnetic planetary gear(MPG)and coaxial magnetic gear(CMG)were the two types of magnetic gears with different topologies and operating principle.By using quantitative design method and finite-element method the torque performance of the MPG and the CMG,which with the same effective volume and the amount of permanent magnets,were compared.The results revealed that the MPG possess a higher torque density and lower torque ripple.Furthermore,considering the MPG had more flexible operation mode and could realize power split,which made MPG an interesting candidate in hybrid electric vehicles,a prototype of MPG was fabricated and tested.Both theoretical analysis and experimental results verified the effectiveness of this topology.