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Energies 2015, 8(8), 7874-7896; doi:10.3390/en8087874

Thermal Analysis of a Novel Cylindrical Transverse-Flux Permanent-Magnet Linear Machine

1
State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, Heilongjiang, China
2
School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150080, Heilongjiang, China
3
ShenHua Guohua (Beijing) Gas-Fired Cogeneration Co., Ltd., Beijing 100024, China
*
Author to whom correspondence should be addressed.
Academic Editor: K. T. Chau
Received: 16 June 2015 / Revised: 15 July 2015 / Accepted: 20 July 2015 / Published: 30 July 2015
(This article belongs to the Special Issue Electric and Hybrid Vehicles)

Abstract

This paper presents a novel staggered-teeth cylindrical transverse-flux permanent-magnet linear machine (TFPMLM), which aims to improve the power factor and force density. Due to the compact structure and high performance requirement, thermal problems should be seriously considered. The three-dimensional (3-D) temperature field model is established. The determination of convection heat transfer coefficients is discussed. Equivalent thermal conductivities of stator core and winding are given to simplify the analysis. With the thermal effect of the adhesive coatings among permanent magnets (PMs) and mover yoke taken into account, the temperature field distribution and variation rules of the TFPMLM are obtained using the finite volume method (FVM). The influences of slot filling factor and air flow velocity on the temperature field distribution are analyzed. It is found that the hottest spot of the TFPMLM appears in the middle of the end winding; and there is no risk of demagnetization for PMs. View Full-Text
Keywords: transverse-flux permanent-magnet linear machine (TFPMLM); temperature field; finite volume method (FVM); convection heat transfer coefficient transverse-flux permanent-magnet linear machine (TFPMLM); temperature field; finite volume method (FVM); convection heat transfer coefficient
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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MDPI and ACS Style

Yu, B.; Zhang, S.; Yan, J.; Cheng, L.; Zheng, P. Thermal Analysis of a Novel Cylindrical Transverse-Flux Permanent-Magnet Linear Machine. Energies 2015, 8, 7874-7896.

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