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Onboard Integrated Battery Charger for EVs Using an Asymmetrical Nine-Phase Machine

Subotic, I and Bodo, N and Levi, E and Jones, M (2015) Onboard Integrated Battery Charger for EVs Using an Asymmetrical Nine-Phase Machine. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 62 (5). pp. 3285-3295. ISSN 0278-0046

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Abstract

This paper considers an integrated onboard charger for electric vehicles that incorporates an asymmetrical
nine-phase machine and an inverter into the charging process. The charging is from three-phase mains, and it employs exclusively the power electronic components that already exist on board the vehicle and that are mandatory for the propulsion. No new elements are introduced. Moreover, the charging is achieved without any hardware reconfiguration since the existing elements and their connections are not altered during the transfer from propulsion to the charging mode. Instead, the operating principle is based on additional degrees of freedom that exist in nine-phase machines. These degrees of freedom are employed to avoid electromagnetic torque production in the machine during the charging process, although currents flow through its stator windings. The configuration operates with a unity power factor and is capable of vehicle to grid (V2G) operation as well. A detailed theoretical analysis is given, and the control for the charging/V2G and propulsion modes is discussed. Theoretical analysis is validated by experiments for charging, V2G, and propulsion operating regimes.

Item Type: Article
Additional Information: (c) 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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 components 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 and Electrical Engineering
Publisher: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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Date Deposited: 13 Nov 2015 14:20
Last Modified: 13 Nov 2015 14:25
DOI or Identification number: 10.1109/TIE.2014.2345341
URI: http://researchonline.ljmu.ac.uk/id/eprint/1839

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