电驱动系统再生制动工况动力学特性研究  

Research on Dynamic Characteristics of Electric Drive System Under Regenerative Braking Condition

作　　者：刘坤 杜长虹 吴维[1] 卢国成 苑士华[1] Liu Kun;Du Changhong;Wu Wei;Lu Guocheng;Yuan Shihua(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081;Chongqing Changan Automobile Co.,Ltd.,Chongqing 400023)

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]重庆长安汽车股份有限公司,重庆400023

出　　处：《汽车工程》2021年第8期1121-1127,共7页Automotive Engineering

基　　金：国家自然科学基金(U1864210,U1764257)资助。

摘　　要：为研究再生制动过程中电动汽车驱动系统的动力学特性,在考虑静态传动误差、齿侧间隙和时变啮合刚度等基础上,进一步耦合轮胎扭转特性,建立了永磁同步电机-两级传动机构-轮胎的机电耦合模型,并进行试验验证。分析了轮胎扭转特性和再生制动转矩对电驱动系统动力学的影响。结果表明:轮胎扭转特性为电驱动系统引入了1阶新的模态,改变了系统1阶模态振型;再生制动转矩较小时,传动机构发生齿轮持续拍击现象;随着再生制动转矩的增加,拍击现象逐渐消失,但电磁转矩反向时传动机构动载荷逐渐增大。研究为电驱动系统动态载荷研究和寿命预测提供理论支持。In order to study the dynamic characteristics of electric vehicle drive system in the regenerative braking process,the tire torsion characteristics are further coupled on the basis of considering static transmission er⁃ror,backlash and time⁃varying meshing stiffness and the electromechanical coupling model of permanent magnet synchronous motor⁃two stage transmission mechanism⁃tire is established and verified by experiments.The influence of tire torsional characteristics and regenerative braking torque on the dynamics of the electric drive system is ana⁃lyzed.The results show that the tire torsional characteristics introduce a new mode into the electric drive system,which changes the first⁃order mode of the system.Gear continuous impact events of the transmission mechanism oc⁃cur when the regenerative braking torque is small,and with the increase of regenerative braking torque,the impact events gradually disappear,but the dynamic load of the transmission mechanism increases when the electromagnet⁃ic torque is reversed.The research provides theoretical support for dynamic load study and life prediction of the elec⁃tric drive system.

关 键 词：电动汽车 再生制动 非线性动力学 轮胎扭转特性 

分 类 号：U469.72[机械工程—车辆工程]