Design of High-Speed Multilayer IPMSM Using Ferrite PM for EV Traction Considering Mechanical and Electrical Characteristics
- Authors
- Jung, Young-Hoon; Park, Min-Ro; Kim, Ki-O; Chin, Jun-Woo; Hong, Jung-Pyo; Lim, Myung-Seop
- Issue Date
- Jan-2021
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Demagnetization; Ferrites; Torque; Induction motors; Traction motors; Permanent magnet motors; Stability analysis; Demagnetization ratio (DR); ferrite permanent magnet (PM); high-speed multilayer interior permanent magnet synchronous motor (HSML IPMSM); irreversible demagnetization; mechanical stability; rare-earth free motor; safety factor (SF); traction motor for electric vehicle (EV)
- Citation
- IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, v.57, no.1, pp.327 - 339
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
- Volume
- 57
- Number
- 1
- Start Page
- 327
- End Page
- 339
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/1644
- DOI
- 10.1109/TIA.2020.3033783
- ISSN
- 0093-9994
- Abstract
- This article proposes a design method of the high-speed multilayer interior permanent magnet synchronous motor (HSML IPMSM) employing the ferrite permanent magnet (PM). Since the maximum speed of the traction motor in this article is 15 kr/min, the mechanical stability must be considered. Additionally, in the case of the HSML IPMSM, as the number of the PM layers increases, the thickness of the PMs must be reduced to be mechanically stable. On the other hand, because the ferrite PM has a relatively low coercive force compared with the Nd PM, an irreversible demagnetization of the ferrite PM of the HSML IPMSM is likely to occur. Therefore, the mechanical stability and irreversible demagnetization must be considered at all design steps. As the irreversible demagnetization and mechanical stability can be confirmed only by the finite-element analysis (FEA), the proposed method in this article is a design method that considers the irreversible demagnetization and mechanical characteristics at all design steps using the FEA. After the design of the traction motor is completed using this design method, the designed motor is manufactured. To verify the validity of the design method, experiments are conducted on the manufactured motor, and the test results are compared with FEA results.
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