Ferrite PM Optimization of SPM BLDC Motor for Oil-Pump Applications According to Magnetization Direction
- Authors
- Liu, Huai-Cong; Kim, Hyun Woo; Jang, Hyung Kwan; Jang, Ik-Sang; Lee, Ju
- Issue Date
- Jun-2020
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Magnetization; Shape; Finite element analysis; Ferrites; Torque; Powders; Brushless motors; Brushless direct current motor (BLDC); magnetization direction; electric oil pump; ferrite permanent
- Citation
- IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, v.30, no.4, pp.1 - 5
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
- Volume
- 30
- Number
- 4
- Start Page
- 1
- End Page
- 5
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/145570
- DOI
- 10.1109/TASC.2020.2977615
- ISSN
- 1051-8223
- Abstract
- This paper proposes optimizing the magnetization direction of isotropic ferrite permanent magnets (Fe-PM) to enable the maximization of back-electromotive force (B-EMF), torque density, and minimum torque ripple of surface permanent magnet brushless direct current motor. The concept design is divided into two steps. First, two general Fe-PM electric oil pump motor models with radial and parallel magnetization are selected and compared with the neodymium permanent magnet models. Secondly, a finite element method (FEM) analysis is carried out with two different magnetization directions for each of the models in open-circuit and load operation. For more accurate results, the effects of no-load B-EMF, magnetic field distribution, air-gap flux density, copper loss, and efficiency are investigated. Finally, the validity and superiority of the FEM design results are confirmed by manufacturing the prototype motor and performing an experiment.
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