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Modelling Approaches for an Asymmetrical Six-Phase Machine

Levi, E and Zabaleta, M and Jones, M Modelling Approaches for an Asymmetrical Six-Phase Machine. In: IEEE International Symposium on Industrial Electronics, 08 June 2016 - 10 June 2016, Santa Clara, California, USA. (Accepted)

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Abstract

With currently available power electronic devices, the power range of a single three-phase power converter is limited well below the power ratings foreseen for remote offshore wind turbines. A solution is to use multiphase systems. By connecting each of the converters to one three-phase winding in the stator of the machine, a multiphase conversion system is obtained allowing to exploit its fault tolerance. In multiphase machines, the basic idea of the model transformations is the same as in the three-phase case, but, due to the increase in the dimension of the system, it introduces additional degrees of freedom. This work at first compares the two widely used modelling approaches regarding physical interpretation of the subspaces, harmonic mapping and representation of asymmetries applied to an asymmetrical six-phase machine. It further introduces an alternative transformation that is aimed at situations where power sharing between three-phase windings is desired and characterises its behaviour using the same figures of merit as for the existing transformations.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Multiphase machines
Subjects: T Technology > TK Electrical engineering. Electronics. Nuclear engineering
Divisions: Electronics and Electrical Engineering
Publisher: IEEE
Date Deposited: 13 Jun 2016 15:09
Last Modified: 13 Jun 2016 15:09
URI: http://researchonline.ljmu.ac.uk/id/eprint/3775

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