The Method of Pole Width Modulation Reducing Cogging Torque in Permanent Magnet Motor

Abstract:

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Cogging torque is one of the most important parameters of permanent magnet motors, which causes torque ripple, vibration and noise. This paper describes the mechanism of cogging torque, introduces several methods of reducing cogging torque and points out the advantage of novel magnet arrayed permanent magnet motor in reducing cogging torque. Ansoft software is used to build the simulation of conventional surface-type permanent magnet motor and novel magnet arrayed permanent magnet motor and to calculate their cogging torque. a cogging torque testing system which included the angle sensor, permanent magnet motor, torque wrenches and other components are tested two different structures motors’ cogging torque .The experimental result is consistent with the simulation results, it shows that the method of novel magnet arrayed permanent magnet motor reducing cogging torque is correct. The new method compare with the same specification on the surface of permanent magnet motor can reduce more cogging torque.

Info:

Periodical:

Advanced Materials Research (Volumes 383-390)

Edited by:

Wu Fan

Pages:

1369-1375

DOI:

10.4028/www.scientific.net/AMR.383-390.1369

Citation:

Y. J. An et al., "The Method of Pole Width Modulation Reducing Cogging Torque in Permanent Magnet Motor", Advanced Materials Research, Vols. 383-390, pp. 1369-1375, 2012

Online since:

November 2011

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Price:

$35.00

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