轮毂电机两挡变速器协同无动力中断换挡控制

doi:10.19562/j.chinasae.qcgc.2023.10.010

Abstract

Abstract:

Distributed drive vehicles have attracted wide attention recently because of their advantages such as independently controllable drive torque of left and right wheels. The use of two-speed transmission can effectively improve the power and economy of this kind of electric vehicles. In this paper， a hub-motor two-speed transmission configuration for distributed drive vehicles is proposed， for which a shift control strategy without power interruption is designed based on feedforward and feedback control method to solve the problem of power interruption in the shif process of the two speed transmission. Then， for the problem of coordinated shift of left-right hub-motor two-gear transmission， a left-right coordinated shift control strategy based on logic threshold is proposed in this paper to avoid large abrupt lateral and longitudinal acceleration in the process of shifting. Finally， based on the Simulink-Simscape model， simulation is performed to verify the control strategies of power non-interruption shift and left-right coordinated shift. The simulation results show that the proposed control strategy can effectively avoid the power interruption in the hub motor two-gear transmission shifting process， and can effectively reduce the abrupt acceleration change of the vehicle due to the left and right uncoordinated shift.

Key words: electric vehicles, distributed drive, hub motor with two-speed transmission, no power interruption, left-right coordinated shift

Junnian Wang,Chunlin Zhang,Mengyuan Zhao,Yue Qiang,Dachang Guo,Fang Yang. Coordinated Shift Control of Hub-Motor Two-Speed Transmission Without Power Interruption[J].Automotive Engineering, 2023, 45(10): 1885-1896.

Figures/Tables 32

系数	$K p x$	$K i x$	$K d x$
$x = 1$	195	15	5
$x = 2$	78	10	2
$x = 3$	180	10	2

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整车参数	数值
整车质量	1 800 kg
迎风面积	2.2 m²
空气阻力系数	0.34
轮胎滚动半径	0.34 m
滚动阻力系数	0.016

挡位	M	C1	C2	OC
1挡	正转	分离	分离	锁死
2挡	正转	接合	分离	分离
倒挡	倒转	分离	接合	分离

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Coordinated Shift Control of Hub-Motor Two-Speed Transmission Without Power Interruption

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