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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2016-10-20
Cogging Torque and Torque Ripple in a Direct-Drive Interior Permanent Magnet Generator
By
Rukmi Dutta,

    Dr. Rukmi Dutta

    Univ New S Wales

    Australia

    Homepage

Kazi Ahsanullah,

    Dr. Kazi Ahsanullah

    School of Electrical Engineering and Telecom

    The University of New South Wales, UNSW

    Australia

    Homepage

Faz Rahman

    Professor Faz Rahman

    University of New South Wales

    Australia

    Homepage

Progress In Electromagnetics Research B, Vol. 70, 73-85, 2016
doi:10.2528/PIERB16072001 | Google Scholar

Abstract
This paper investigates the cogging torque and torque ripple in high pole number interior permanent magnet generators, designed for direct-drive applications. Two interior permanent magnet rotor topologies --- flat-shaped and V-shaped were considered with distributed wound and fractional slot concentrated wound stators. A comparison of torque performances was made between distributed wound and fractional-slot concentrated wound generators. Cogging torque was minimized by finding an optimum magnet pole arc length and torque ripples were minimized by finding optimum slotopening and flux barrier shape. Design analysis was carried out in finite element models. It was found that flat-shaped rotor topology in the fractional slot concentrated wound stator can provide the best torque performance regarding low cogging torque and torque ripple. This finding was verified in constructed prototype machine.
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Citation
Rukmi Dutta, Kazi Ahsanullah, and Faz Rahman, "Cogging Torque and Torque Ripple in a Direct-Drive Interior Permanent Magnet Generator," Progress In Electromagnetics Research B, Vol. 70, 73-85, 2016.
doi:10.2528/PIERB16072001
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