Bifurcation Analysis of Five-Phase Induction Motor Drives With Third Harmonic Injection
Duran, M.J.
Salas, F.
Arahal, M.R.
Univ. of Malaga, Malaga;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: May 2008
Volume: 55,
Issue: 5
On page(s): 2006-2014
ISSN: 0278-0046
INSPEC Accession Number: 9944361
Digital Object Identifier: 10.1109/TIE.2008.918470
Current Version Published: 2008-04-30
Abstract
The interest in variable-speed multiphase induction- motor drives has substantially increased in recent years and novel proposals show good prospects for industrial implementation in high-power applications. The additional degrees of freedom existing in multiphase machines have allowed for new applications with high torque density by current harmonic injection in concentrated winding machines. This paper addresses, for the first time, the bifurcation analysis of a five-phase induction-motor drive when a third harmonic is injected for torque-enhancement purposes. The main focus of this paper is to present a mathematically based study of the nonlinear dynamics of the proposed drive with torque enhancement. The overall bifurcation analysis for both concentrated and distributed winding machines confirms that the harmonic injection provides not only torque enhancement but also more robust controllers. This further advantage offers improved performance of multiphase drives compared to their three-phase counterparts.
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