双调制同轴磁齿轮的结构设计与传动性能分析

Structural Design and Transmission Performance Analysis of Double Modulated Coaxial Magnetic Gear

针对传统磁齿轮永磁体漏磁现象而引起的传递转矩较低的问题,在永磁体气隙相对磁导率推导分析的基础上,建立了具有双调制结构的同轴式磁齿轮模型。运用有限元方法对该模型进行仿真,分析研究了辅助磁通调制的作用,并计算磁通密度和传递转矩,与传统磁齿轮的磁通密度和传递转矩进行了比较。仿真结果表明,双调制结构的同轴式磁齿轮能有效增强气隙磁通密度,减少漏磁并提高传递转矩。这种双调制磁齿轮结构对同轴式磁齿轮转矩密度的提高及应用具有重要意义。

Aiming at the problem of low transmission torque caused by the magnetic flux leakage phe nomenon of the traditional magnetic gear permanent magnet,a coaxial magnetic gear model with double mod ulation structure is established based on the relative permeability derivation analysis of the permanent magnet air gap. The finite element method is used to simulate the model. The role of auxiliary flux modulation is ana lyzed and the flux density and transmission torque are calculated. The magnetic flux density and transmission torque of the conventional magnetic gear are compared. The simulation results show that the coaxial magnetic gear with double modulation structure can effectively enhance the air gap flux density,and reduce the magnet ic flux leakage and increase the transmission torque. This double-modulated magnetic gear structure is of great significance for the research and application of the improvement of the torque density of the coaxial magnetic gear.