Title: Comprehensive analysis of BLDC motor faults in electric vehicle transportation

Authors: Adil Usman; Bharat Singh Rajpurohit

Addresses: School of Computing and Electrical Engineering, Indian Institute of Technology Mandi, HP, India; Electrical and Computer Engineering Department, University of California Santa Cruz, CA, USA ' School of Computing and Electrical Engineering, Indian Institute of Technology Mandi, HP, India

Abstract: The faults prospective are higher for any BLDC motor, driven under a constant and continuous operating period. The possibility of getting susceptible to winding short-circuit faults and rotor demagnetisation effects, is more frequently discerned. The winding insulation breakdown introduces stator inter-turn fault (SITF) conditions in the machine which has consequent detrimental impact on the rotor permanent magnets (PMs). The cumulative effect of fault stimulates rotor demagnetisation, intensifying the effect of faults. This paper aims in classifying the motor faults employed in electric vehicle (EV) transportation. Depending upon the machine's characteristic performance in terms of electrical signatures like, motor current signature (MCS) and back-EMF (BEMF), and mechanical signatures like frequency and vibration spectrum; a unique classification to fault is provided. The proposed research models investigate the performance of a machine drive under both individual and combined fault conditions, to give a significant outcome to the research findings. The closed loop motor drive operation is performed using an advanced field remodelling (AFR)-based technique which employs fuzzy logic controller (FLC). The developed drive-controller-system minimises the steady state error under motor operating conditions and has a clear discrepancy in terms of machine quantities during faults.

Keywords: advanced field remodelling method; AFR method; brushless DC motors; BLDC motors; demagnetisation; finite element method magnetics; FEMM; numerical methods; NMs; permanent magnet; PM; stator inter-turn fault; SITF.

DOI: 10.1504/IJPELEC.2023.131417

International Journal of Power Electronics, 2023 Vol.18 No.1, pp.40 - 64

Received: 07 Feb 2022
Accepted: 09 May 2022
Published online: 11 Jun 2023 *

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