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Erschienen in:

2019 | OriginalPaper | Buchkapitel

Effect of Unbalanced Vertical Force of IWM on Comfort and Stability in Four-Wheel Drive Electric Vehicle

verfasst von : Zhe Li, Ling Zheng, Yinong Li, Yusheng Li, Zhoubin Xiong

Erschienen in: Proceedings of the 19th Asia Pacific Automotive Engineering Conference & SAE-China Congress 2017: Selected Papers

Verlag: Springer Singapore

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Abstract

With the development of electrification and intellectualization in vehicle, In-Wheel-Motor Electric-Vehicles (IWM-EVs), which eliminates mechanical transmission system and integrates fast and accurate multidimensional dynamic control, has brought significant attention in automotive industry. However, special power source arrangement and structure could enlarge vehicle unsprung weight and deteriorate wheel dynamic load. In recent years, switched reluctance (SR) motor gradually turns into a perfect IWM candidate due to high power density and dependable performance; however, tremendous ripple in output torque is directly applied to the wheels, resulting in vertical vibration which affects ride comfort and handling stability in IWM-EVs. In this paper, certain factors behind imbalanced radial force in SRM and vertical vibration of in-wheel drive vehicle are investigated by means of analytical and finite element methods. The effect of unbalanced radial force in SRM on comfort and stability of IWM-EV is analyzed and discussed. It is shown that vertical force could cause tremendous deterioration in wheel dynamic load. Otherwise, it may overlap with the resonance frequencies of vehicle wheels and body. This influences vehicle vibration response at low speed and deteriorates the ride comfort in vehicle. It is also found that the excitation has little effect on vehicle stability at given frequency bands. The negative influence of the electromagnetic excitation on the ride comfort and handling stability should not be ignored.

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Titel: Effect of Unbalanced Vertical Force of IWM on Comfort and Stability in Four-Wheel Drive Electric Vehicle
verfasst von: Zhe Li
Ling Zheng
Yinong Li
Yusheng Li
Zhoubin Xiong
Verlag: Springer Singapore
Buch: Proceedings of the 19th Asia Pacific Automotive Engineering Conference & SAE-China Congress 2017: Selected Papers
Print ISBN: 978-981-10-8505-5

Electronic ISBN: 978-981-10-8506-2

Copyright-Jahr: 2019
DOI: https://doi.org/10.1007/978-981-10-8506-2_70

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