NDLI: Design and Optimization of Neodymium-Free SPOKE-Type Motor With Segmented Wing-Shaped PM

Content Provider	IEEE Xplore Digital Library
Author	Rahman, M.M. Kyung-Tae Kim Jin Hur
Copyright Year	1965
Abstract	This paper proposes a new design of SPOKE-type PM brushless direct current (BLDC) motor without using neodymium PM (Nd-PM). The proposed model has an improved output characteristic as it uses the properties of the magnetic flux effect of the SPOKE-type motor with an additional pushing assistant magnet and subassistant magnet in the shape of spoke. In this paper, ferrite PM (Fe-PM) is used instead of Nd-PM. First, the air-gap flux density and backelectromotive force (BEMF) are obtained based on the field model. Second, the analytical expressions of magnet field strength and magnet flux density are obtained in the air gap produced by Fe-PM. The developed analytical model is obtained by solving the magnetic scalar potential. Finally, the air-gap field distribution and BEMF of SPOKE-type motor are analyzed. The analysis works for internal rotor motor topologies. This paper validates results of the analytical model by finite-element analysis for wing-shaped SPOKE-type BLDC motors.
Sponsorship	IEEE Magnetics Society
Starting Page	865
Ending Page	868
Page Count	4
File Size	977498
File Format	PDF
ISSN	00189464
Volume Number	50
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
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 Brushless DC motors Analytical models Induction motors Air gaps SPOKE-type brushless direct current (BLDC) motor Electric machine flux barrier Halbach magnetization Nd-free motor
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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