一种新型永磁齿轮的性能分析与参数优化

Performance Analysis and Parameters Optimization on a Novel Permanent Magnetic Gear

首先简要介绍了磁场调制式永磁齿轮的工作原理,由于永磁齿轮两转子间非刚性磁耦合特性,导致在启动以及负载和转速发生变化时,出现转矩和转速的暂态振荡现象。为了提高整个传动系统的动态稳定性,提出一种在高速转子侧增加阻尼绕组的永磁齿轮结构,利用电磁场分析软件建立了有限元仿真模型,并对其进行永磁体及调磁环参数优化分析以获得最大静态转矩,改变阻尼绕组半径及端环阻值大小以减小动态调节时间。仿真结果证明,阻尼绕组的加入能有效减小负载侧转矩和转速的振荡幅值,缩短调节时间,合理的结构参数使得永磁齿轮在获得最大静态转矩的基础上,动态性能得以提高。

The principle of a novel field modulated permanent magnetic gear is briefly introduced. Magnetic gears always experience transient oscillations due to their non-rigid magnetic coupling between two rotors while undergoing starting and changes in speed or load. In order to improve the dynamic stability of the whole transmission system, the damper windings are added to the side of the high-speed rotor of magnetic gears. Based on the field computations by finite element analysis, the simulation model is built. The parameters of permanent magnets and modulating ring are optimized by setting the maximum torque as a goal. The radius of the damper bar and the resistance of the end ring are also changed for reducing the dynamic setting time. The simulation results show that the setting time and oscillation amplitude for torque of the load side can be reduced effectively. The maximum static torque is obtained by selecting reasonable structural parameters, and the dynamic performance is more stable.