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World Electric Vehicle Journal is published by MDPI from Volume 9 issue 1 (2018). Articles in this Issue were published by The World Electric Vehicle Association (WEVA) and its member the European Association for e-Mobility (AVERE), the Electric Drive Transportation Association (EDTA), and the Electric Vehicle Association of Asia Pacific (EVAAP). They are hosted by MDPI on mdpi.com as a courtesy and upon agreement with AVERE.
Open AccessArticle

Stability of an Electric Vehicle with Permanent-Magnet In-Wheel Motors during Electrical Faults

1
Department of Chassis and Vehicle Dynamics, Volvo Cars Corporation, SE-405 31 Göteborg, Sweden
2
Swedish Center of Excellence in Electric Power Engineering (EKC2), Royal Inst. of Technology (KTH), SE-100 44 Stockholm, Sweden
*
Author to whom correspondence should be addressed.
World Electr. Veh. J. 2007, 1(1), 100-107; https://doi.org/10.3390/wevj1010100
Published: 28 December 2007
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Abstract

This paper presents an analysis of the stability of an electric vehicle equipped with in-wheel motors of permanent-magnet type during a class of electrical faults. Due to the constant excitation from the permanent magnets, the output torque from a faulted wheel cannot easily be removed if an inverter shuts down, which directly affects the vehicle stability. In this paper, the impact of an electrical fault during two driving scenarios is investigated by simulations; using parameters from a 30 kW in-wheel motor and experimentally obtained tire data. It is shown that the electrical fault risks to seriously degrading the vehicle stability if the correct counteraction is not taken quickly. However, it is also demonstrated that vehicle stability during an electrical fault can be maintained with only minor lateral displacements when a closed-loop path controller and a simple method to allocate the individual tire forces are used. This inherent capacity to handle an important class of electrical faults is attractive; especially since no additional fault-handling strategy or hardware is needed.
Keywords: Control system; electrical failure; inverter; in-wheel motor; permanent-magnet motor Control system; electrical failure; inverter; in-wheel motor; permanent-magnet motor
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Jonasson, M.; Wallmark, O. Stability of an Electric Vehicle with Permanent-Magnet In-Wheel Motors during Electrical Faults. World Electr. Veh. J. 2007, 1, 100-107.

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