NDLI: Design considerations of sinusoidally excited permanent magnet machines for low torque ripple applications

Content Provider	IEEE Xplore Digital Library
Author	Islam, M.S. Mir, S. Sebastian, T. Underwood, S.
Copyright Year	2004
Description	Author affiliation: Delphi Steering, Saginaw, MI, USA (Islam, M.S.; Mir, S.; Sebastian, T.; Underwood, S.)
Abstract	Several high performance applications such as electric power steering require, the motor drive to produce smooth torque with very stringent torque ripple requirement. This paper is focused on various machine design considerations that can be used in reducing the torque ripple of a sinusoidally excited permanent magnet (PM) brushless DC (BLDC) motor. The paper quantifies the various sources of torque ripple, which may be minimized by appropriate design considerations. The paper discusses the factors influencing the harmonic content of the induced voltage, effect of slot/pole combination, winding distribution and magnetic saturation. Design optimization is directed to minimize cogging torque and the harmonic contents in the back-emf, thus reducing the overall torque ripple. Comprehensive finite element analysis along with experimental data is provided to validate the theory. The research demonstrates that saturation in the magnetic circuit is another major contributor to the torque ripple and torque nonlinearity as the current increases. A model is developed to study the saturation effect on torque linearity and is verified by FE simulation. Design techniques have been provided to minimize the overall torque ripple and increase the torque linearity.
Starting Page	1723
Ending Page	1730
File Size	403623
Page Count	8
File Format	PDF
ISBN	0780384865
ISSN	01972618
DOI	10.1109/IAS.2004.1348703
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-10-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Permanent magnet machines Motor drives Torque Brushless motors Brushless DC motors Linearity Voltage DC motors Permanent magnet motors Saturation magnetization
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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