Electric vehicles with in-wheel switched reluctance motors: Coupling effects between road excitation and the unbalanced radial force

2016 ◽  
Vol 372 ◽  
pp. 69-81 ◽  
Author(s):  
Yanyang Wang ◽  
Pingfei Li ◽  
Guizhou Ren
Keyword(s):  
Electric Vehicles ◽  
Radial Force ◽  
Switched Reluctance Motors ◽  
Coupling Effects ◽  
Switched Reluctance ◽  
Road Excitation

Modeling and suppression of unbalanced radial force for in-wheel motor driving system

2021 ◽  
pp. 107754632110260
Author(s):  
Zhaoxue Deng ◽  
Xu Li ◽  
Tianqin Liu ◽  
Shuen Zhao
Keyword(s):  
Electromagnetic Force ◽  
Switched Reluctance Motor ◽  
Radial Force ◽  
Force Amplitude ◽  
Switched Reluctance ◽  
Driving System ◽  
Coupling Relationship ◽  
Force Fluctuation ◽  
Reluctance Motor ◽  
Road Excitation

Considering the negative vertical dynamics effect of switched reluctance motor on an in-wheel motor driving system, this article presents a modeling and suppression method for unbalanced radial force of the in-wheel motor driving system. To tease out the coupling relationship within the in-wheel motor driving system, this investigation, respectively, explores the principle of unbalanced radial force and the coupling relationship between rotor eccentricity and road excitation based on the suspension response model with unbalanced radial force under road excitation. The switched reluctance motor nonlinear analytical model was fitted by the Fourier series, and its radial electromagnetic force was modeled and analyzed by the Maxwell stress tensor method. To mitigate the influence of radial electromagnetic force fluctuation and unbalanced radial force amplitude value under eccentricity condition on the in-wheel motor driving system, the elitist non-dominated sorting genetic algorithm was adopted to improve radial electromagnetic force fluctuation and unbalanced radial force amplitude value of the switched reluctance motor. The simulation results show that the proposed optimization method can suppress the radial electromagnetic force fluctuation and unbalanced radial force amplitude value, and the negative effect of vertical dynamics of the in-wheel motor driving system is conspicuously mitigated.

scholarly journals The Unbalanced Radial Force of In-Wheel Switched Reluctance Motors Effect on Vehicle Performance under Stability Condition

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Yanyang Wang ◽  
Funing Yang ◽  
Fuxing Shang ◽  
Qing Xiong
Keyword(s):  
Stability Condition ◽  
Stability Criterion ◽  
Radial Force ◽  
Mode Analysis ◽  
Vehicle Stability ◽  
Vertical Force ◽  
Switched Reluctance Motors ◽  
Vehicle Performance ◽  
Switched Reluctance ◽  
Vehicle System

This paper studies the unbalanced radial force of in-wheel switched reluctance motors effect on vehicle performance under stability condition. First, the IWM-EV vehicle model which highlights the new factors of the rotor, stator, SRM vertical force, and airgap deflection was adopted. And the vehicle comparison models were established to make a contrastive study about IWM-EV new structure effects. Then, Routh’s stability criterion method was adopted to judge the vehicle system’s stability condition. It includes two parts: characteristic polynomial of the vehicle system which is served to calculate the IWM-EV system Routh array and Routh’s stability criterion which is used to judge the vehicle system’s stability condition. The effect of the new structure on vehicle performance was further discussed under stability condition. It mainly includes two aspects: vehicle vibration mode analysis which is used to study vehicle vibration characteristics and amplitude-frequency analysis which is served to research transfer response characteristics of the vehicle system. The result shows that the new structure of IWM-EV has a negative effect on vehicle stability performance. The SRM vertical force will change vehicle stability characteristic. In some severe cases, it will even destroy IWM-EV’s stability.

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