纯电动汽车电驱动系统耦合动力学研究

doi:10.19562/j.chinasae.qcgc.2022.12.011

Abstract

Abstract:

In order to study the dynamic characteristics of electric drive system of pure electric vehicle， considering spatio-temporal electromagnetic excitation and system structure flexibility， an electromechanical coupling dynamic model of integrated electric drive system suitable for variable speed conditions is proposed and verified by simulation. By means of dynamic analysis， the effect of motor torque fluctuation， gear error and housing flexibility on the dynamic characteristics of electric drive system is studied under steady-state and acceleration conditions. The study shows that the influence of motor torque fluctuation on the bearing force is not obvious under the steady-state condition， the gear error will significantly increase the amplitude of gear dynamic meshing torque and bearing reaction force， and the influence of housing flexibility on gear dynamic meshing torque is slight. Under the acceleration condition， the gear error is easy to stimulate the system high-frequency resonance， and the low-order resonance related to rotating frequency is also easy to be excited after coupling the housing.

Key words: pure electric vehicle, electric drive system, motor, gear, coupling dynamics

Changzhao Liu,Tie Zhang,Jian Song,Xiansong Yin,Shuaishuai Ge. Study on Coupling Dynamics of Electric Drive System of Pure Electric Vehicle[J].Automotive Engineering, 2022, 44(12): 1896-1909.

Figures/Tables 40

References 18

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构件	参数	数值
电机	稳态/峰值功率/kW	75/150
	稳态/峰值转矩/（N·m）	150/300
	稳态/峰值转速/（r·min^-1）	5 000/10 000
两级平行轴斜齿轮		第一级	第二级
		主/从	主/从
	齿数	23/68	20/75
	法向模数/mm	2	3
	法向压力角/（°）	18	18
	螺旋角/（°）	21	20
	法向齿顶高系数	1	1
	法向顶隙系数	0.25	0.25
	齿宽/mm	30	50
差速器		行星齿轮	半轴齿轮
	齿数	11	16
	模数/mm	4.83	4.83
	压力角/（°）	25	25
	节圆直径/mm	53.15	77.31
	节锥角	34°30′36″	55°29′24″

阶数	特征值	阶数	特征值
14	-0.04 ± 40.00i	34	-1513.01 ± 1857.59i
15	-46.88 ± 455.41i	35	-7511.47 ± 2244.10i
16	-165.66 ± 650.47i	36	-1809.16 ± 2264.99i
17	-1352.70 ± 662.44i	37	-1913.14 ± 2328.40i
18	-1198.16 ± 680.62i	38	-2962.74 ± 2699.09i
19	-3045.57 ± 752.85i	39	-2964.21 ± 2699.69i
20	-1708.99 ± 769.43i	40	-2285.17 ± 3135.32i
21	-223.19 ± 842.86i	41	-1083.74 ± 3407.39i
…	…	42	-3868.22 ± 3672.30i
32	-631.60 ± 1755.95i	43	-4931.73 ± 3702.37i
33	-631.63 ± 1755.98i	44	-4267.41 ± 4235.08i

项目		电机转速/ （r·min^-1）	激发频率	阶数	固有频率/Hz
不考虑齿轮误差	第一危险	8 888.84	f_m1	41	3 407.39
	第二危险	1 053.58	2f_mb	21	842.86
	第三危险	4 259.24	2f_mb	34	3 407.39
考虑齿轮误差	第一危险	8 888.84	f_m1	41	3 407.39
	第二危险	1 888.88	16f_m2	41	3 407.39
	第三危险	6 044.41	5f_m2	41	3 407.39

阶数	特征值	阶数	特征值
14	-0.08 ± 40.00i	34	-301.68 ± 1020.80i
15	-11.88 ± 91.23i	35	-471.54 ± 1033.95i
16	-50.01 ± 152.83i	36	-571.81 ± 1180.17i
17	-178.30 ± 230.94i	…	…
18	-94.30 ± 265.58i	54	-631.60 ± 1755.95i
19	-318.58 ± 314.50i	55	-631.63 ± 1755.98i
20	-277.93 ± 417.60i	56	-528.46 ± 1809.48i
21	-3466.45 ± 459.37i	57	-735.56 ± 1907.78i
…	…	…	…
30	-191.56 ± 838.73i	70	-1556.28 ± 3183.43i
31	-348.24 ± 905.80i	71	-953.22 ± 3384.69i
32	-321.56 ± 936.93i	72	-5133.06 ± 3855.07i
33	-400.13 ± 1008.07i	73	-4323.85 ± 4067.44i

项目		电机转速/（r·min^-1）	激发频率	阶数	固有频率/Hz
不耦合箱体	第一危险	8 888.84	f_m1	41	3 407.39
	第二危险	1 053.58	2f_mb	21	842.86
	第三危险	4 259.24	2f_mb	34	1 857.59
耦合箱体	第一危险	8 829.63	f_m1	71	3 384.69
	第二危险	1 048.41	2f_mb	30	838.73
	第三危险	4 230.86	2f_mb	71	3 384.69
		9 169.80	f_r1	16	152.83

Study on Coupling Dynamics of Electric Drive System of Pure Electric Vehicle

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