NDLI: Investigation of Torque Ripples in Permanent Magnet Synchronous Machines With Skewing

Content Provider	IEEE Xplore Digital Library
Author	Chu, W.Q. Zhu, Z.Q.
Copyright Year	1965
Abstract	This paper investigates the influence of skewing on torque ripples, including the electromagnetic (EM) torque ripple, and the cogging torque, in permanent magnet (PM) machines. It is found that the effectiveness of skewing largely depends on the axial variation of a torque ripple phase but less on its magnitude under skewing. It is further found that, in both linear and nonlinear cases, the EM and the on-load torque ripple cannot be fully eliminated by skewing one on-load torque ripple period or any other angles, except 360^° electrical, which is impractical. This is due to the fact that the EM torque ripple, especially its phase, of each slice is different due to the axial variation of the equivalent current phase advance angle introduced by skewing. In nonlinear cases, the EM torque ripple variation is further aggravated by the axial variation of magnetic saturation. The EM torque ripple as well as the on-load torque ripple may be even increased by skewing, especially when the cogging torque is low and electric loading is high.
Sponsorship	IEEE Magnetics Society
Starting Page	1211
Ending Page	1220
Page Count	10
File Size	2219937
File Format	PDF
ISSN	00189464
Volume Number	49
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Torque Saturation magnetization Forging Magnetic flux Harmonic analysis Rotors Stators torque ripple Cogging torque magnetic saturation permanent magnet (PM) machines skewing
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Reduction of On-Load Torque Ripples in Permanent Magnet Synchronous Machines by Improved Skewing

Torque Analysis of Permanent-Magnet Flux Switching Machines With Rotor Step Skewing

Influence of Electric Loading and Magnetic Saturation on Cogging Torque, Back-EMF and Torque Ripple of PM Machines

Design Tradeoff Between Cogging Torque and Torque Ripple in Fractional Slot Surface-Mounted Permanent Magnet Machines

On-Load Cogging Torque Calculation in Permanent Magnet Machines

Investigation of Torque Characteristics in a Novel Permanent Magnet Flux Switching Machine With an Outer-Rotor Configuration

Influence of Stator Asymmetry on Cogging Torque of Permanent Magnet Brushless Machines

Analytical Methods for Minimizing Cogging Torque in Permanent-Magnet Machines

Reduction of Cogging Torque in Double-Rotor Axial-Flux Permanent-Magnet Disk Motors: A Review of Cost-Effective Magnet-Skewing Techniques With Experimental Verification

Investigation of Torque Ripples in Permanent Magnet Synchronous Machines With Skewing

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