Abstract
A speed sensor fault-tolerant control (FTC) strategy for electric vehicle is proposed in electric vehicles using a consequent-pole permanent-magnet (CPPM) machine. In order to obtain good FTC performance at low speed region, a HF voltage injection method is proposed to detect the rotor position from the magnetic saliency. This magnetic saliency of a CPPM machine is analysed by the finite-element analysis (FEA), and the high-frequency (HF) impedances are measured to confirm the saliency. At high speed range, the extended-electromotive force (EMF) method is applied when the failure of the speed sensor is detected. The speed sensor FTC strategy is verified effective by experimental results on a 25kW CPPM machine at different operating conditions. The reliability is enhanced and smooth transition to the fault-tolerant operation is realized. DOI: http://dx.doi.org/10.5755/j01.eee.20.7.5087
Highlights
Permanent magnet synchronous machine (PMSM) based propulsion system is wildly used in electric vehicles (EVs) due to its high torque capability and power density [1]
To verify the effectiveness of the proposed speed sensor fault-tolerant control (FTC) strategy, the control functions were implemented according to Fig. 7 in a control board, which was constructed by the TMS320F2808 digital signal processor
This paper proposes a speed sensor FTC strategy for EVs using a consequent-pole permanent-magnet (CPPM) machine-based drive system
Summary
Zheran Li1, Yesong Li1, Xinhua Li2 1Department of Control Science and Engineering, Automation Institute, Huazhong University of Science and Technology, Hubei, China.
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