重庆大学学报2024，Vol.47Issue(1)：69-83,15.DOI:10.11835/j.issn.1000-582X.2022.102
轮毂电机驱动电动汽车机电耦合垂向动力学特性
Vertical dynamic characteristics of electromechanical coupling of in-wheel motor drive system for electric vehicle
摘要
Abstract
Due to the double action of road excitation and vehicle weight,the stator and rotor of the in-wheel motor(IWM)for electric vehicles(EVs)are relatively eccentric,thus generating an unbalanced magnetic force(UMF).When the vertical component of UMF is coupled with the vertical vibration of the suspension system of the vehicle,the ride comfort and other properties of EV are affected.To study this electromechanical coupling problem,by taking a permanent magnet IWM as the research object,the vertical dynamic characteristics of electromechanical coupling of an IWM drive system for electric vehicle were investigated.Firstly,the air gap flux density distribution of IWM under load was obtained by superposition method of magnetic field.By introducing complex relative permeance and correction coefficient of permeance when the motor was eccentric,analytical models of the eccentric magnetic fields of IWM and UMF were obtained with the stator slotting effect taken into account,and the validity of the analytical models was verified by finite element simulation and prototype test.Then,according to the real-time coupling relationship between the vertical vibration of the suspension system and the eccentric UMF of IWM,the dynamic equation of the vehicle was solved by using the Lagrangian method,and the vertical coupling vibration model of a quarter car body was established.Finally,taking the vertical vibration acceleration of the stator of IWM,the vertical vibration acceleration of the car body,the dynamic deflection of the suspension and the dynamic load of the tire as the main indexes,the effect of electromechanical coupling on the vertical dynamic characteristics of EV was studied,and the mechanism of electromechanical coupling between the output characteristics of UMF and dynamic response of EV was revealed.The results show that the electromechanical coupling effect impairs the ride stability,operation stability and safety of EV.关键词
轮毂电机/磁隙偏心/机电耦合/不平衡磁拉力/垂向动力学特性Key words
in-wheel motor/magnetic gap eccentricity/electromechanical coupling/unbalanced magnetic force/vertical dynamic characteristics分类
信息技术与安全科学引用本文复制引用
李天成,邓兆祥,张河山,卢泮苹,曾鹏飞..轮毂电机驱动电动汽车机电耦合垂向动力学特性[J].重庆大学学报,2024,47(1):69-83,15.基金项目
重庆市技术创新与应用发展重点项目(cstc2019jscx-mbdxX0059) （cstc2019jscx-mbdxX0059）
重庆市自然科学基金博士后科学基金(cstc2020jcyj-bshX0065).Supported by Chongqing Technology Innovation and Application Development Key Project(cstc2019jscx-mbdxX0059),and Postdoctoral Science Foundation of Natural Science Foundation of Chongqing(cstc2020jcyj-bshX0065). （cstc2020jcyj-bshX0065）
