A1 Journal article (refereed), original research

High-torque-density IPMSM rotor pole geometry adjustment for smooth torque

Open Access publication

Publication Details
Authors: Petrov Ilya, Lindh Pia, Niemelä Markku, Scherman Eero, Pyrhönen Juha
Publisher: Institute of Electrical and Electronics Engineers (IEEE): OAJ / IEEE
Publication year: 2019
Language: English
Volume number: 7
Start page: 52650
End page: 52658
Number of pages: 9
ISSN: 2169-3536
JUFO-Level of this publication: 2
Open Access: Open Access publication


High-torque-density electrical machines applied to traction operate at a varying torque
and speed, and therefore, when minimizing the torque ripple, a wide variety of possible loads must be
considered. Different loads need different current vectors, which affect the magnetic state of the machine.
Thus, the torque ripple must be analyzed by using appropriate current vectors as it is proposed and described
in this paper. The torque ripple values were estimated also for a skewed machine using a new method
of torque ripple estimation of a skewed machine. The method is computationally less heavy and allows
computing the torque ripple at all possible load points. Using the proposed method in the analysis of the
machine parameters, the rotor pole geometry was adjusted to minimize the torque ripple without degradation
of the other properties of the machine. Finally, the best machine performance was compared with the
measured results.

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Last updated on 2020-20-03 at 10:03