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

Energies

Bin Yu³  Shukuan Zhang³  Jidong Yan²  Luming Cheng³  Ping Zheng¹ 

[1] State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, Heilongjiang, China;ShenHua Guohua (Beijing) Gas-Fired Cogeneration Co., Ltd., Beijing 100024, China; E-Mail:;School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150080, Heilongjiang, China; E-Mails:

关键词: transverse-flux permanent-magnet linear machine (TFPMLM);    temperature field;    finite volume method (FVM);    convection heat transfer coefficient;   

DOI  :  10.3390/en8087874

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.