NDLI: Taguchi robust optimum design for reducing the cogging torque of EPS motors considering magnetic unbalance caused by manufacturing tolerances of PM

Content Provider	IET Digital Library
Author	Kim, Kyu Seob Jung, Kyung Tae Kim, Ji Min Hong, Jung Pyo Kim, Sung Il
Abstract	Electric machines are widely used across a variety of applications. In particular, the cogging torque of a permanent magnet (PM) synchronous motor is a significantly important characteristic in the application of electric power steering (EPS) systems. Accordingly, various optimal design methods are adopted to reduce the cogging torque for an EPS motor. However, in most cases, the measured cogging torque of the EPS motor is much greater than finite element method result, because the additional cogging torque harmonic components are generated by manufacturing tolerances. Especially, the specific harmonic components are produced due to magnetic unbalance by the asymmetry of motor shape which is caused by the tolerances in motor cores or PMs. These components are not eliminated by applying a skew. Thus, in order to reduce the effect of the tolerances, a robust design is needed. In this study, the effect of PM tolerances is studied, and Taguchi robust design is performed to enhance the motor quality regardless of the tolerances.
Starting Page	909
Ending Page	915
Page Count	7
ISSN	17518660
Volume Number	10
e-ISSN	17518679
Issue Number	Issue 9, Nov (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-epa/10/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2015.0638
Journal	IET Electric Power Applications
Publisher Date	2016-11-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Cogging Torque Harmonic Component Cogging Torque Reduction Electric Machines Electric Power Steering System EPS Motors Magnetic Unbalance Motor Cores Motor Quality Enhancement Motor Shape Asymmetry Permanent Magnet Motors Permanent Magnet Synchronous Motor PM Manufacturing Tolerances Power Equipment Manufacturing Statistics Steering System Synchronous Machine Synchronous Motors Taguchi Method Taguchi Robust Optimum Design Tolerance Effect Reduction
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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