一种具有内置橡胶衬套的新型轮毂电机(英文)

A Novel in-wheel Motor with Inner Rubber Bushings

针对现有轮毂电机驱动电动车辆非簧载质量增加及路面激励引起的轮毂电机气隙不均匀带来的车辆平顺性和舒适性恶化问题,提出了一种新型内置悬置系统电动轮的拓扑结构方案。此方案通过设置弹性元件将轮毂电机作为一个整体与非簧载质量进行弹性隔离,将电机转化为与簧载质量并联的质量,以此来提高非簧载质量和簧载质量的比值。同时,利用弹性元件吸收路面传递给电机的振动能量,尽量减小路面激励对电机磁隙的影响,达到改善车辆垂向动力学特性的目的。对有、无悬置系统的两种电动轮驱动系统方案进行了垂向动力学特性对比分析。结果表明,设置悬置元件后,车辆车身加速度、轮胎动载荷、悬架动行程及定转子相对位移量方面均有不同程度的改善。由此可见,悬置系统的设置在改善车辆垂向性能方面具有一定效果,对于解决引入轮毂电机后车辆非簧载质量增加的弊端有重要意义,同时为轮毂电机驱动电动汽车的设计提供了可借鉴的结构方案和分析方法。

A novel in-wheel motor topology scheme is brought forward. This scheme aims at conquering the unsprung mass increase because of the motor in wheel and the motor magnet gap deformation generated by road surface roughness excitation. By mounting rubber bushings in the in-wheel motor device, the in-wheel motor mass is flexibly isolated from the unsprung mass. Synchronously, the rubber bushings can absorb the vibration energy from the road surface and abate the motor magnet gap deformation. By contrastive simulations of the two type in-wheel motor schemes with or without bushings, some useful results come out. With the rubber bushings, the body vibration acceleration, the tire dynamic load, the suspension dynamic travel and the magnet gap deformation can all be improved to different extents. Consequently, rubber bushings can observably improve the in-wheel motor vehicle vertical dynamics. The scheme and the analysis approach can be contributive to the development of in-wheel motor propulsion system.