Optimization Design of High Speed Permanent Magnet Motor Rotor Electrical Vehicles
With the development of electrical vehicles drive motor towards high voltage,high speed,high ef-ficiency and high comfort,higher requirements are put forwards for the design of PM machine.Taking the rotor structure design of a vehicle high-speed in-wheel PM machine with peak power of 65kW,maximum speed of 9500r/min and peak torque of 650Nm as an example,the electromagnetic,heat transfer,and me-chanical characteristics of the machine rotor were studied and analyzed by establishing finite element and thermal circuit models.In order to improve the comfort of vehicle operation,the rotor magnetic circuit struc-ture parameters were used as optimization parameters and the rotor of the in-wheel machine was optimized by the Taguchi method.Under the premise of ensuring that the output torque not reduced,aiming to reduce mo-tor torque ripple,the parameters with the lowest cogging torque and THD of winding back electromotive force preferred combination.Simulation results show that compare with parameters before optimization,the torque ripple is reduced by 1.3％.This research has theoretical significance for design of high-speed permanent magnet motors for heavy-duty unmanned vehicles.
万方数据
维普
