电驱动系统再生制动工况动力学特性研究

doi:10.19562/j.chinasae.qcgc.2021.08.001

Abstract

Abstract:

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 error， 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 analyzed. 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 occur 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 electromagnetic torque is reversed. The research provides theoretical support for dynamic load study and life prediction of the electric drive system.

Key words: electric vehicle, regenerative braking, nonlinear dynamics, tire torsion characteristics

Kun Liu,Changhong Du,Wei Wu,Guocheng Lu,Shihua Yuan. Research on Dynamic Characteristics of Electric Drive System Under Regenerative Braking Condition[J].Automotive Engineering, 2021, 43(8): 1121-1127.

Figures/Tables 12

References 12

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参数	数值
整备质量m_t/kg	1 650
迎风面积A/m²	1.95
空气阻力系数C_D	0.39
轮胎半径R_t/m	0.32
轮毂惯量I_a/（kg·m²）	0.95
轮胎扭转刚度k_tire/（N·m·rad^-1）	4 750

参数	数值
齿轮齿数Z_g1、Z_g2、Z_g3、Z_g4	26、75、25、79
分度圆螺旋角/（°）	30.5
一级、二级齿轮模数/mm	1.6、2.414
轴承支撑刚度/（N·m^-1）	1×10⁸
输入轴扭转刚度k_tin/（N·m·rad^-1）	4.3×10⁴
中间轴扭转刚度k_tmid/（N·m·rad^-1）	1.2×10⁵
输出轴扭转刚度k_tout/（N·m·rad^-1）	5.1×10⁴
齿侧间隙2b/m	4×10^-4
转子极对数p_n	4
交轴电感L_d、直轴电感L_q/mH	0.60、0.67

阶数	不考虑轮胎扭转特性固有频率/Hz	考虑轮胎扭转特性固有频率/Hz
0	0	10.3
1	77.2	85.4
2	729.9	729.9
3	827.9	827.9
4	1 594	1 594
5	2 533	2 533

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

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