Design of brushless DC motor with weight reduction and performance improvements considering twelve step control

Article type: Research Article

Authors: Kim, Sung-An^a | Park, Soo-Keun^b | Cho, Yun-Hyun^c;

Affiliations: [a] Korea Marine Equipment Research Institute, Ulsan, Korea | [b] Korea Institute of Industrial Technology, Seoul, Korea | [c] Department of Electrical Engineering, Dong-A University, Busan, Korea

Correspondence: [*] Corresponding author: Yun-Hyun Cho, Department of Electrical Engineering, Dong-A University, Busan, Korea. Tel.: +82 51 200 7742; Fax: +82 51 200 7743; E-mail: yhcho@dau.ac.kr

Abstract: This paper presents the cost reduction design of a brushless DC motor (BLDCM) considering twelve step control. The twelve step control can improve the output of the motor using the conventional six step control. Weight reduction can be effectively achieved by reducing rotor, stator and magnet through optimization of BLDCM using a response surface method (RSM). The BLDCM volume was decreased by about 45%, while satisfying basic performance requirements and improving efficiency. Original and optimized motors were built and tested. Experimental results are compared in terms of output power and efficiency.

Keywords: Brushless DC motor, sensorless control, twelve step, response surface method, finite element method analysis

DOI: 10.3233/JAE-171002

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 59, no. 2, pp. 729-736, 2019