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Energies 2018, 11(8), 1998; https://doi.org/10.3390/en11081998

Design Issues for Claw Pole Machines with Soft Magnetic Composite Cores

1
State Key Laboratory of Reliability and Intelligence of Electrical Equipment, School of Electrical Engineering, Hebei University of Technology, Tianjin 300130, China
2
Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, School of Electrical Engineering, Hebei University of Technology, Tianjin 300130, China
3
School of Electrical and Data Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
4
School of Electrical and Information Engineering, University of Sydney, Ultimo, NSW 2007, Australia
*
Author to whom correspondence should be addressed.
Received: 17 July 2018 / Revised: 26 July 2018 / Accepted: 28 July 2018 / Published: 1 August 2018
(This article belongs to the Section Energy Fundamentals and Conversion)
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Abstract

By using global ring winding, the torque coefficient of the transverse flux machine (TFM) is proportional to its number of pole pairs, and thus the TFM possesses high torque density ability when compared with other electrical machines. As a special kind of TFM, the claw pole machine (CPM) can have more torque due to its special claw pole teeth. The manufacturing of CPM or TFM with silicon steels was very difficult in the past, and is a handicap for the progress of this kind of machine. Thanks to the advent of soft magnetic composite (SMC) materials, the manufacturing process of CPM has become more and more simple. More attention has been paid to this kind of technology, and some mass production CPMs with SMC cores have appeared. However, there are few works that discuss the key design issues for this kind of machine. In this paper, a small CPM with SMC is used as as a research benchmark. Various design methods that can be adopted to improve its performance have been studied, including unequal stator claw pole teeth, a skewing magnet design, consequent pole design, and etc. The 3D finite element method (FEM) is used for the machine analysis, and it is verified by the experimental results of a CPM with SMC cores. View Full-Text
Keywords: claw pole machine (CPM); soft magnetic composite (SMC); design issues; finite element method (FEM) claw pole machine (CPM); soft magnetic composite (SMC); design issues; finite element method (FEM)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Liu, C.; Lu, J.; Wang, Y.; Lei, G.; Zhu, J.; Guo, Y. Design Issues for Claw Pole Machines with Soft Magnetic Composite Cores. Energies 2018, 11, 1998.

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