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Energies 2017, 10(11), 1716; https://doi.org/10.3390/en10111716

Core Loss Analysis of Interior Permanent Magnet Synchronous Machines under SVPWM Excitation with Considering Saturation

National Engineering Laboratory for Electric Vehicles, Beijing Institute of Technology, No. 5 South Zhongguancun Street, Haidian District, Beijing 100081, China
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Author to whom correspondence should be addressed.
Academic Editor: Tomonobu Senjyu
Received: 22 September 2017 / Revised: 10 October 2017 / Accepted: 16 October 2017 / Published: 26 October 2017
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Abstract

Core loss is one of the significant factors affecting the high power density of permanent magnet machines; thus, it is necessary to consider core loss in machine design. This paper presents a novel method for calculating the core loss of permanent magnet synchronous machines under space vector pulse width modulation (SVPWM) excitation, taking magnetic saturation and cross coupling into account. In order to accurately obtain the direct and quadrature (d-q) axis, current in the given load condition, the permanent magnet motor model under SVPWM excitation has been modified, so as to consider the influence of magnetic saturation and cross coupling effects on the d-q axis flux-linkage. Based on the magnetic field distribution caused by permanent magnet and armature reactions, the stator core loss can be calculated with the core loss analytical model, corresponding to the rotational magnetic field. In this study, the method has been applied to analyze core loss in an interior permanent magnet synchronous machine, and has been validated by the experimental results. The influence of pole/slot number combinations on core loss in the same on-load condition is also investigated. This study provides a potential method to guide motor design optimization. View Full-Text
Keywords: core loss; magnetic saturation; space vector pulse width modulation (SVPWM); flux-linkage; interior permanent magnet synchronous machine (IPMSM) core loss; magnetic saturation; space vector pulse width modulation (SVPWM); flux-linkage; interior permanent magnet synchronous machine (IPMSM)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Feng, Y.; Zhang, C. Core Loss Analysis of Interior Permanent Magnet Synchronous Machines under SVPWM Excitation with Considering Saturation. Energies 2017, 10, 1716.

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