A fault-tolerant motor drive for electric and hybrid vehicle applications

• Main Author: Cao, Zhi
• Other Authors: Christopher H. T. Lee
• Format: Thesis-Master by Coursework
• Language: English
• Published: Nanyang Technological University 2023
• Subjects: Engineering::Electrical and electronic engineering::Applications of electronics; Engineering::Mechanical engineering::Motor vehicles
• Online Access: https://hdl.handle.net/10356/168592
• Institution: Nanyang Technological University

This research proposes a fault-tolerant Permanent Magnet Vernier Motor (PMVM) design for Electric Vehicles/Hybrid Electric Vehicles (EV/HEV). The design is based on the basic principles of fault-tolerant PMV and the structure of PMVM, with optimized parameters to enhance the fault-tolerance performance. The proposed design is verified through simulations under normal operation and short circuit conditions. The design includes a split-tooth stator, a single-layer fractional slot concentrated winding, and dual three-phase windings to improve phase isolation, reduce copper consumption, and increase flexibility in the fault-tolerant control strategy. The optimized parameters include smaller opening width of the slot, larger width of PMP tooth, and a thicker PM. The analysis shows that the fault-tolerant PMVM achieves 83% of its rated torque output in face of one-phase short circuit fault and has high fault-tolerance performance. The proposed design can contribute to the development of more reliable and efficient electric motors for EV/HEV applications.