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Optimal Third-Harmonic Current Injection for Asymmetrical Multiphase PMSMs

Levi, E, Slunjski, M, Cervone, A and Brando, G (2020) Optimal Third-Harmonic Current Injection for Asymmetrical Multiphase PMSMs. IEEE Transactions on Industrial Electronics. ISSN 0278-0046

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Abstract

The paper proposes a modelling approach and an optimization strategy to exploit a third harmonic current injection for the torque enhancement in multiphase isotropic PMSMs with non-sinusoidal back-EMFs. The modelling approach is based on a proper vector space decomposition and on the associated rotational transformation, aimed to properly select a set of stator current space vectors to be controlled. It is presented for a generic (i.e. asymmetrical, with an arbitrary angular shift) winding configuration. The injection strategy is related to the choice of a constant synchronous current set, aimed at minimizing the average stator winding losses for a given reference torque by using the 1st and the 3rd spatial harmonics of the air-gap flux density. The optimal solution has been found analytically and has been developed in detail for a selected set of asymmetrical winding configurations. Both the numerical and experimental results are in good agreement with the theoretical analysis.

Item Type: Article
Additional Information: © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords: 08 Information and Computing Sciences, 09 Engineering
Subjects: T Technology > TK Electrical engineering. Electronics. Nuclear engineering
Divisions: Electronics & Electrical Engineering
Publisher: Institute of Electrical and Electronics Engineers
Date Deposited: 12 Mar 2020 11:07
Last Modified: 26 Mar 2020 10:15
DOI or Identification number: 10.1109/TIE.2020.2982099
URI: http://researchonline.ljmu.ac.uk/id/eprint/12466

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