A rotor design of a BLDC motor used for reciprocating compressor considering demagnetization

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

Article type: Research Article

Authors: You, Yong-Min^a | Kim, Dae-Kyong^b | Kwon, Byung-Il^{a; *}

Affiliations: [a] Department of Electronic, Electrical, Control and Instrumentation Engineering, Hanyang University, Korea | [b] Korea Electronics Technology Institute (KETI), Korea

Correspondence: [*] Corresponding author. Tel.: +82 31 409 1277; Fax: +82 31 409 1277; E-mail: bikwon@hanyang.ac.kr

Abstract: This paper presents the design of a reliable rotor shape of a BLDC motor used for reciprocating compressor considering demagnetization. Three types of rotor shape are proposed for BLDC motor and a proper rotor shape is selected by characteristic analysis using the 2D finite element method (FEM). To verify the accuracy of the analysis results, a prototype was built and tested. In order to design a reliable rotor shape against the demagnetization of the ferrite magnet, the demagnetization analysis is performed according to variation of design variables of the ferrite magnet using the 2D FEM. As a result, the BLDC motor with the developed rotor shape showed good performance to resist partial demagnetization.

Keywords: Demagnetization, BLDC, Reciprocating Compressor, ferrite magnet, FEM

DOI: 10.3233/JAE-2010-1174

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 1-2, pp. 689-695, 2010