Analytical study of axial-flux hybrid excitation eddy current brakes

Subtitle:

Article type: Research Article

Authors: Yazdanpanah, Reza^* | Mirsalim, Mojtaba

Affiliations: Electrical Engineering Department and Center of Excellence in Power Engineering, Amirkabir University of Technology, Tehran, Iran

Correspondence: [*] Corresponding author: Reza Yazdanpanah, 732 Abu- Rayhan Building, Department of Electrical Engineering, Amirkabir University of Technology, 424 Hafez Ave. Tehran 15914, Iran. Tel.: +98 21 6454 3321; Fax: +98 21 6640 6469; E-mail:ryazdanpanah@aut.ac.ir

Abstract: This paper presents an analytical field solution of an axial-flux hybrid excitation eddy current brake using the space harmonics of the magnetic vector potential. In the study, the analytical model is improved to take into account the 3-D effects that are neglected in the simplified 2-D model. Based on the analytical solution, the magnetic flux density distribution, the induced eddy current, and the generated braking torque are calculated. Also, the effects of two important parameters on the brake characteristic are investigated. Finite element analysis is employed to confirm the validity of the analytical analysis and the outcomes.

Keywords: Analytical study, brake design, eddy current, finite element, hybrid excitation

DOI: 10.3233/JAE-140019

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 47, no. 4, pp. 885-896, 2015