Design of novel magnetic flux barrier for reducing cogging torque in IPM type BLDC motor

Issue title: Selected Papers from the 14th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2009), Part I

Article type: Research Article

Authors: Yang, Byoung-Yull^a | Hwang, Kyu-Yun^a | Shin, Dong-Joo^a | Kwon, Byung-Il^{a; *}

Affiliations: [a] Department of Electronic, Electrical, Control and Instrumentation Engineering, Hanyang University, Korea

Correspondence: [*] Corresponding author. Tel.: +82 31 409 1277; Fax: +82 31 409 1277; E-mail: [email protected]

Abstract: This paper introduces a rotor core in an interior permanent magnet type brushless DC motor. The rotor core consists of a rotor surface having a non-uniform air gap and a novel magnetic flux barrier. We show that, in the rotor core, the rotor surface having the non-uniform air gap effectively reduces the cogging torque while the optimized magnetic flux barrier reduces the cogging torque, and increases the average torque and the efficiency.

Keywords: Cogging torque, IPM type BLDC motor, taguchi method

DOI: 10.3233/JAE-2010-1169

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 1-2, pp. 649-654, 2010