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Energies 2012, 5(9), 3586-3607; doi:10.3390/en5093586

Harmonic Analysis and Fault-Tolerant Capability of a Semi-12-Phase Permanent-Magnet Synchronous Machine Used for EVs

Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, China
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Received: 11 June 2012 / Revised: 1 September 2012 / Accepted: 5 September 2012 / Published: 17 September 2012

Abstract

This paper deals with a fault-tolerant semi-12-phase permanent-magnet synchronous machine (PMSM) used for electric vehicles. High fault-tolerant and low toque ripple features are achieved by employing fractional slot concentrated windings (FSCWs) and open windings. Excessive magnetomotive force (MMF) harmonic components can lead to thermal demagnetization of rotor magnets as well as high core loss. An improved all-teeth-wound winding disposition that changes the winding factor of each harmonic is applied to suppress harmonics. A relatively large slot leakage inductance that limits the short-circuit current (SCC) induced in the short-circuited winding is proposed to deal with short-circuit fault. Fault-tolerant controls up to two phases open circuited are investigated in this paper based on keeping the same torque-producing MMF. The fault-tolerant control strategies corresponding to each faulty mode are studied and compared to ensure high performance operation.
Keywords: fractional slot concentrated winding; fault-tolerant control; harmonic analysis; multiphase PMSM; open winding fractional slot concentrated winding; fault-tolerant control; harmonic analysis; multiphase PMSM; open winding
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Zheng, P.; Wu, F.; Sui, Y.; Wang, P.; Lei, Y.; Wang, H. Harmonic Analysis and Fault-Tolerant Capability of a Semi-12-Phase Permanent-Magnet Synchronous Machine Used for EVs. Energies 2012, 5, 3586-3607.

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