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A dc-link voltage stability analysis technique for hybrid five-phase open-end winding drives

Darijevic, M, Levi, E and Jones, M (2019) A dc-link voltage stability analysis technique for hybrid five-phase open-end winding drives. IET Electric Power Applications, 13 (11). pp. 1708-1716. ISSN 1751-8679

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This paper studies the dc-link voltage stability for a hybrid five-phase open-end winding (OeW) drive operating under carrier based (CB) pulse-width modulation (PWM). The drive consists of a five-phase induction machine, supplied using one three-level and one two-level voltage source inverter (VSI). This configuration is analysed for the case of isolated dc-link rails, while dc-link voltage ratio is considered as an additional degree of freedom. It is demonstrated that different dc-link voltage ratios lead to the different overall number of voltage levels across stator windings. Modulation strategies are investigated and their performances are analysed from the dc-link voltages stability point of view. An analytical method for dc-link voltage stability analysis is presented. Results show that the four-level configuration always leads to stable dc-link voltages, regardless of the modulation strategy. On the other hand, if six-level configuration is combined with modulation strategies that lead to an optimal harmonic performance, not all dc-link capacitor voltages will be in balance depending on the operating conditions.

Item Type: Article
Additional Information: This paper is a postprint of a paper submitted to and accepted for publication in IET Electric Power Applications and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at the IET Digital Library
Uncontrolled Keywords: 0906 Electrical and Electronic Engineering
Subjects: T Technology > TK Electrical engineering. Electronics. Nuclear engineering
Divisions: Electronics & Electrical Engineering (merged with Engineering 10 Aug 20)
Publisher: Institution of Engineering and Technology
Date Deposited: 10 Jul 2019 07:57
Last Modified: 04 Sep 2021 09:11
DOI or ID number: 10.1049/iet-epa.2018.5969
URI: https://researchonline.ljmu.ac.uk/id/eprint/11016
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