Negative dynamics effect of in-wheel switched reluctance motor with inclined airgap eccentricity on handing stability for electric vehicle

Abstract

This paper focuses on the negative effect of in-wheel switched reluctance motor (SRM) with inclined airgap eccentricity for the handling stability of electric vehicle (EV). Firstly, the radial electromagnetic force of the SRM under inclined airgap eccentricity is deduced based on the Maxwell stress tensor and airgap permeability correction coefficient, and the calculation results are verified by the built measurement device. Then, a dynamics model of in-wheel motor driving EV is constructed according to the response relationship of driving wheels. Finally, the influence of unbalanced radial torque (URT) on the negative dynamic effect of EV is analyzed with angular step input and sine input respectively. The simulation results show that the EV will deviate from the expected trajectory due to the impact of URT, which will threaten driving safety in vehicle steering or overtaking. In addition, the vehicle yaw velocity will deteriorate with the increase of the driving speed and turning angle, which will affect the dynamics response of vehicle handling stability. This research, starting from the coupling relationship between in-wheel motor response characteristics and vehicle driving conditions, can provide theoretical support for the popularization and application for in-wheel motor driving EVs.

Keywords

Electric vehicle in-wheel motor switched reluctance motor inclined airgap eccentricity radial electromagnetic force

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References

Pomponi

Scalzi

Pasquale

, et al. Automatic motor speed reference generators for cruise and lateral control of electric vehicles with in-wheel motors. Control Eng Pract 2018; 79: 126–143.

Sun

Huang

, et al. Vibration effect and control of in-wheel switched reluctance motor for electric vehicle. J Sound Vib 2015; 338: 105–120.

Zhang

Wang

, et al. Effect of series/parallel circuits of eccentric switched reluctance motor on vehicle ride comfort. J Braz Soc Mech Sci Eng 2021; 43: 1–12.

Jin

. Study on the ride comfort of vehicles driven by in-wheel motors. Adv Mech Eng 2016; 8: 071832450.

Xue

Cheng

KWE

, et al. Multi-objective optimization design of in-wheel switched reluctance motors in electric vehicles. IEEE Trans Ind Electron 2010; 57: 2980–2987.

. Multiobjective optimization of switched reluctance motors based on design of experiments and particle swarm optimization. IEEE Trans Energy Convers 2015; 30: 1144–1153.

Rezig

Boudendouna

Djerdir

, et al. Investigation of optimal control for vibration and noise reduction in-wheel switched reluctance motor used in electric vehicle. Math Comput Simul 2020; 167: 267–280.

Zheng

Ren

, et al. Multi-objective optimization of active suspension system in electric vehicle with in-wheel-motor against the negative electromechanical coupling effects. Mech Syst Signal Process 2019; 116: 545–565.

Qin

Shao

, et al. Vibration mitigation for in-wheel switched reluctance motor driven electric vehicle with dynamic vibration absorbing structures. J Sound Vib 2018; 419: 249–267.

10.

Shao

Naghdy

, et al. Coupling effect between road excitation and an in-wheel switched reluctance motor on vehicle ride comfort and active suspension control. J Sound Vib 2019; 443: 683–702.

11.

Wang

Yang

Shang

, et al. The unbalanced radial force of in-wheel switched reluctance motors effect on vehicle performance under stability condition. Shock Vib 2018; 2018: 1–11.

12.

Zheng

Gao

, et al. Electromechanical coupling mechanism and control strategy for in-wheel-motor-driven electric vehicles. IEEE Trans Ind Electron 2019; 66: 4524–4533.

13.

Kobayashi

Katsuyama

Sugiura

, et al. Direct yaw moment control and power consumption of in-wheel motor vehicle in steady-state turning. Veh Syst Dyn 2017; 55: 104–120.

14.

Deng

Liu

, et al. Analytical representation and characteristics optimization for radial electromagnetic force of the switched reluctance motor under airgap eccentricity. Proc IMechE, Part C: J Mechanical Engineering Science 2022; 236(14): 7629–7640.

15.

Wang

, et al. Transverse nonlinear vibration of the eccentric rotor in a 12/8 switched reluctance motor. Eng Comput 2020; 37: 2711–2733.

16.

Zheng

. Coupling effects in hub motor and optimization for active suspension system to improve the vehicle and the motor performance. J Sound Vib 2020; 482: 115426.

17.

Yang

Wang

. Suppression of switched reluctance motor vibration of in-wheel motor electric vehicle. J Contr Sci Eng 2018; 2018: 1–13.

18.

Wang

Ren

. Electric vehicles with in-wheel switched reluctance motors: coupling effects between road excitation and the unbalanced radial force. J Sound Vib 2016; 372: 69–81.

19.

Tan

. The influence of the magnetic force generated by the in-wheel motor on the vertical and lateral coupling dynamics of electric vehicles. IEEE Trans Veh Technol 2016; 65: 4655–4668.

20.

Xue

Cheng

KWE

Lin

, et al. Optimal control method of motoring operation for SRM drives in electric vehicles. IEEE Trans Veh Technol 2010; 59: 1191–1204.

21.

Pang

Zhang

Wang

, et al. Flux density calculation of air gap for switched reluctance motor considering magnetic saturation based on sub-domain method. COMPEL 2018; 37: 2081–2092.

22.

Choi

. Contribution of chassis key subsystems to rollover stability control. Proc IMechE, Part D: J Automobile Engineering 2012; 226: 479–493.