双电机耦合驱动系统构型分层设计方法

doi:10.19562/j.chinasae.qcgc.2023.10.011

Abstract

Abstract:

The dual-motor coupling drive system can realize mode shifting without power interruption and efficiently driving under different loads， which significantly improves the power performance and energy economy of pure electric vehicles. Due to its characteristics of multi-degree-of-freedom and multi-power-source drive， the configuration design has no regularities to follow. In this paper， the function analysis method is used to study the process of function generation and structure derivation of the dual-motor coupling drive system configuration， and a hierarchical design method including function generation and structure derivation is proposed. A graph theory model with sub-mechanism as the basic unit is established； the path coupling conditions are determined based on motion interference. Through path superimposition， the shift sequences that meet functional requirements are obtained. A stepwise structure derivation method from basic configuration to gear-shaft configuration and gear-shaft configuration to concrete configuration is proposed. Finally， taking an electric commercial vehicle as an example， the optimal scheme is selected for parameters design and simulation analysis. Compared with the original vehicle， the power consumption for 100 km of this scheme is reduced by 8.97% in C-WTVC working condition， and the acceleration time from 0-50 km/h is shortened by 8.9 s.

Key words: pure electric vehicle, dual-motor coupling drive system, configuration, design method

Xueliang Li,Zhifu Zhao,Shujun Yang,Zengxiong Peng. Configuration Hierarchical Design Method of Dual-Motor Coupling Drive System[J].Automotive Engineering, 2023, 45(10): 1897-1907.

Figures/Tables 27

References 20

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多动力源路径操纵序列		子路径						个数	种类
多动力源路径操纵序列		a	b	c	d	e	f	个数	种类
B₁	｛c₁， e₁f₁， c₂｝｛d₁e₁c₁， d₁f₁， d₂f₁， d₂e₁c₂｝	0	0	2	2	1	1	6	4
B₂	｛c₁， e₁f₁， c₂｝｛d₁e₁c₁， d₁f₁， b₁， d₁e₁c₂｝	0	1	2	1	1	1	6	5
B₃	｛c₁， e₁f₁， c₂｝｛d₁e₁c₁， d₁f₁， d₂f₁， d₂e₂c₂｝	0	0	2	2	2	1	7	4
B₄	｛e₁f₁， e₂f₁， c₁｝｛a₁e₁f₁， d₁f₁， d₂f₁， d₂e₂c₁｝	1	0	1	2	2	1	7	5
B₅	｛e₁f₁， c₁， c₂｝｛a₁e₁f₁， d₁f₁， d₁f₂， a₁c₂｝	1	0	2	1	1	2	7	5
B₆	｛c₁， e₁f₁， c₂｝｛d₁e₁c₁， d₁f₁， b₁， d₁e₂c₂｝	0	1	2	1	2	1	7	5
B₇	｛c₁， e₁f₁， c₂｝｛d₁e₁c₁， b₁， b₂， d₁e₁c₂｝	0	2	2	1	1	1	7	5
B₈	｛c₁， e₁f₁， c₂｝｛a₁c₁， b₁， b₂， a₁c₂｝	1	2	2	0	1	1	7	5
B₉	｛c₁， e₁f₁， c₂｝｛a₁c₁， d₁f₁， d₂f₁， a₁c₂｝	1	0	2	2	1	1	7	5

子路径	连接自由度	个数
c	F₂-F₃	2
d	F₁-F₄	2
e	F₂-F₄	1
f	F₄-F₃	1

序列	变连接结构	布置形式
B₁	c₁， c₂， d₁， d₂， e₁， f₁	c₁-c₂， d₁-d₂， e₁， f₁
B₂	b₁， c₁， c₂， d₁， e₁， f₁	b₁-d₁， c₁-c₂， e₁， f₁
B₃	c₁， c₂， d₁， d₂， e₁， e₂， f₁	c₁-c₂， d₁-d₂， e₁-e₂， f₁
B₄	a₁， c₁， d₁， d₂， e₁， e₂， f₁	a₁-e₂， c₁-e₁， d₁-d₂， f₁
B₅	a₁， c₁， c₂， d₁， e₁， f₁， f₂	a₁-d₁， c₁-c₂， e₁， f₁-f₂
B₆	b₁， c₁， c₂， d₁， e₁， e₂， f₁	b₁-d₁， c₁-c₂， e₁-e₂， f₁
B₇	b₁， b₂， c₁， c₂， d₁， e₁， f₁	b₁-b₂， c₁-c₂， d₁-f₁， e₁
B₈	a₁， b₁， b₂， c₁， c₂， e₁， f₁	a₁-e₁， b₁-b₂， c₁-c₂， f₁； a₁， b₁-b₂， c₁-e₁， c₂-f₁
B₉	a₁， c₁， c₂， d₁， d₂， e₁， f₁	a₁-e₁， c₁-c₂， d₁-d₂， f₁

参数	数值
整备质量m/kg	25 000
迎风面积A/m²	6.825
轮胎半径R/m	0.51
风阻系数C_d	0.8
滚动阻力系数f	0.01
最大车速u_max/（km·h^-1）	100

参数	数值
电机峰值功率/kW	260
电机峰值转矩/（N·m）	2 800
电机峰值转速/（r·min^-1）	3 000
主减速器传动比	5.92
变速器传动比	3.99/2.47/1.55/0.97

Configuration Hierarchical Design Method of Dual-Motor Coupling Drive System

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References 20

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挡位	a^x	r	R₁	R₂	R₃	R₄
EM1	0.6	1.01	3.99	2.49	1.55	0.97
EM2	0.6	1.01	3.99	2.49	1.55

模式	1	2	3	4	5	6	7	8	9
EM1	1	2	3	4	2	3	4	3	4
EM2	1	1	1	1	2	2	2	3	3