Analytical prediction of the cogging torque in external-rotor single-phase BLDC motors with tapered air-gap

Article type: Research Article

Authors: Park, Young-Un^a | Kim, Dae-kyong^a;

Affiliations: [a] Green Energy Research Institute, Department of Electrical Engineering, Sunchon National University, Suncheon, Korea

Correspondence: [*] Corresponding author: Dae-kyong Kim, Department of Electrical Engineering, Sunchon National University, 540-950, Suncheon, Korea. Tel.: +82 61 750 3546; Fax: +82 61 750 3546; E-mail: dkkim@sunchon.ac.kr

Abstract: The proposed study analyzes the cogging torque of a single-phase BLDC motor with a tapered air-gap through use of a proposed analytical method with asymmetric slot function. Usefulness of the proposed analytical method was confirmed via comparison of cogging torque characteristics predicted through use of the proposed method against those predicted by 2-D finite element analysis as well as those observed experimentally.

Keywords: Asymmetric air-gap, asymmetric notch, analytical method, cogging torque, singlephase brushless DC motor, tapered air-gap, tapered teeth

DOI: 10.3233/JAE-171089

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 59, no. 2, pp. 721-728, 2019