Journal of Jilin University(Engineering and Technology Edition) ›› 2025, Vol. 55 ›› Issue (8): 2475-2486.doi: 10.13229/j.cnki.jdxbgxb.20231064

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Speed fluctuation suppression strategy of range extender based on motor torque compensation

Jin-wu GAO1,2(),Shao-long SUN1,2,Shun-yao WANG3,Bing-zhao GAO4   

  1. 1.State Key Laboratory of Automotive Simulation and Control，Jilin University，Changchun 130022，China
    2.College of Communication Engineering，Jilin University，Changchun 130022，China
    3.Zibo Special Equipment Inspection and Research Institute，Zibo 255035，China
    4.Automotive Institute，Tongji University，Shanghai 201804，China
  • Received:2023-10-09 Online:2025-08-01 Published:2025-11-14

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Abstract:

To enhance the system's response speed and anti-interference capability and reduce the speed fluctuations of the range extender， a method of using generator torque to compensate for engine torque vibration is peoposed. The output torque of the engine to determine the influence of the harmonic components in the torque on the speed is analyzed. Then， a control strategy combining an adaptive backstepping method and a repetitive controller is designed. The repetitive controller is parameterized based on the fundamental frequency of the periodic torque disturbance of the system， and the stability and robustness of the system are analyzed. Finally， simulation experiments are conducted under different operating conditions， and the results show that this control strategy has good effectiveness and practicability in suppressing the speed fluctuations of the range extender.

Key words: Vehicle engineering, control theory and control engineering, speed control, torque compensation, adaptive backstepping, repetitive control

CLC Number: 

  • TP273

Fig.1

Structure of extended range electric vehicles"

Fig.2

Block diagramcontrol system structure"

Fig.3

Amplitude-frequency characteristic curve of torque observer"

Fig.4

Repetitive controller structure diagram"

Fig.5

Bode plot of low-pass filter Q（z）"

Fig.6

System structure diagram"

Fig.7

Comparison of amplitude frequency characteristic curves between zN -Q（z）=0 and zN -1=0"

Fig.8

Range extender system model"

Fig.9

Engine speed characteristics based on AMESim simulation"

Table 1

Parameters of permanent magnet synchronous motor"

参数数值
相电感/H0.000 7
相电阻/Ω0.070 0
磁通/Wb0.070 0
极对数4.000 0
转动惯量/（kg·m2）0.100 0
黏滞摩擦因数0.001 0

Table 2

Engine parameters"

参数数值
活塞行程/mm88.20
曲柄半径/mm44.10
气缸直径/mm80.50
连杆长度/mm129.75
压缩比10.50
总排量/L0.90

Fig.10

Simulation verification under reverse towing conditions"

Fig.11

Simulation verification under engine starting conditions"

Fig.12

Range extender speed when expected speed step changes"

Fig.13

Comparison of speed suppression effect under reverse towing condition with different sampling frequencies"

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