Investigation of slot-pole combinations on IPM BLDC motor considering magnetization direction

Article type: Research Article

Authors: Kim, Hong-seok^a | Kwon, Jung-woo^a | Kwon, Byung-il^a;

Affiliations: [a] Department of Electronic Systems Engineering, Hanyang University, Ansan, Gyeonggi-do, Korea

Correspondence: [*] Corresponding author: Department of Electronic Systems Engineering, Hanyang University,  55 Hanyangdeahak-ro, Sangnok-gu, Ansan, Gyeonggi-do, 15588, Korea. E-mail: [email protected]

Abstract: In this paper, comparisons of the interior permanent magnet (IPM) BLDC motor characteristics considering the slot-pole combination and the magnetization direction simultaneously were done. The three directions of magnetization, radial, parallel and concentration were selected and analyzed for the same permanent magnet shape. No-load and load characteristics were compared. As a result, the motor efficiency of the combination of 6-slot and concentration directions was the best. Through analysis and comparisons, it was confirmed that the magnetization direction should also be considered as an important variable in initial design of the motor.

Keywords: Interior permanent magnet, slot-pole combination, magnetization direction, torque ripple, radial force

DOI: 10.3233/JAE-171126

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 59, no. 3, pp. 865-872, 2019