Magnetic gear scaling analysis using magnetomechanical deflection analysis

Issue title: Proceedings from the 16th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2013)

Guest editors: Xavier Maldague and Toshiyuki Takagi

Article type: Research Article

Authors: Uppalapati, Kiran^{a; *} | Bird, Jonathan Z.^a

Affiliations: [a] Laboratory for Electromechanical Energy Conversion and Control, Electrical and Computer Engineering, University of North Carolina at Charlotte, Charlotte, NC, USA | Université Laval, Canada | Tohoku University, Japan

Correspondence: [*] Corresponding author: Kiran Uppalapati, Laboratory for Electromechanical Energy Conversion and Control, Electrical and Computer Engineering, University of North Carolina at Charlotte, 9201 University City Blvd., 28213, Charlotte, NC, USA. E-mail: [email protected]

Abstract: In this paper the mechanical deflection of steel bars, of different length, in a flux focusing magnetic gear is studied. The mechanical deflection is caused by the magnetic attraction between the steel bars and the inner and outer rotor magnets of the magnetic gear. An iterative magnetomechanical approach using commercial finite element analysis software has been adopted. Two different diameter magnetic gear models with different axial lengths have been modeled and the deflection has been calculated for each model. Experimental verification for one model is also shown. The paper shows that when operating with a small air-gap and long axial length the mechanical deflection can become significant.

Keywords: Magnetic forces, displacement, magnetic flux density, magnetic gear

DOI: 10.3233/JAE-141878

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 45, no. 1-4, pp. 565-571, 2014