Effect of angle displacements on electromagnetic performance of dual three-phase consequent-pole permanent magnet machine
The machine with consequent pole (CP) rotor can improve the utilisation ratio of permanent magnet (PM). However, all the N poles or S poles are replaced by salient rotor iron, leading to the asymmetric air-gap flux density. It potentially results in even-order back electromotive force (back-EMF) har...
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Published in | IET electric power applications Vol. 14; no. 7; pp. 1177 - 1185 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
The Institution of Engineering and Technology
01.07.2020
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Subjects | |
Online Access | Get full text |
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Summary: | The machine with consequent pole (CP) rotor can improve the utilisation ratio of permanent magnet (PM). However, all the N poles or S poles are replaced by salient rotor iron, leading to the asymmetric air-gap flux density. It potentially results in even-order back electromotive force (back-EMF) harmonics and unbalanced magnetic force. This study aims to investigate the influence of various angle displacements (i.e. 0°, 15°, 30° and 60°) on the electromagnetic performance of the dual three-phase PM machine with CP rotor. The electromagnetic characteristics, including air-gap flux density, back-EMF, torque performance, short circuit current, braking torque and PM demagnetisation under both healthy and fault conditions are compared comprehensively. Finally, the 24-slot/22-pole prototype machine is manufactured. The back-EMF waveforms and static torque are measured and compared to the finite-element predicted results to validate the theoretical analysis. |
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ISSN: | 1751-8660 1751-8679 1751-8679 |
DOI: | 10.1049/iet-epa.2019.0611 |