Torque pulsation minimization in spoke-type interior permanent magnet motors with skewing and sinusoidal permanent magnet configurations
- Authors
- Zhao, Wenliang; Lipo, Thomas Anthony; KWON, BYUNG IL
- Issue Date
- May-2015
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Citation
- 2015 IEEE International Magnetics Conference, INTERMAG 2015, pp.1 - 1
- Indexed
- SCOPUS
- Journal Title
- 2015 IEEE International Magnetics Conference, INTERMAG 2015
- Start Page
- 1
- End Page
- 1
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/20577
- DOI
- 10.1109/INTMAG.2015.7156886
- ISSN
- 2150-4598
- Abstract
- Interior permanent magnet motors (IPMMs) are increasingly popular in many applications for all power ranges due to their high torque density, high efficiency and wide operating range [1]. In particular, the spoke-type IPMM has relatively high torque density benefiting from the permanent magnet (PM) flux concentration. However, it has drawbacks such as a serious distortion of airgap flux density distribution leading to distortion of the back-EMF and high torque pulsation (cogging torque and torque ripple), which is intolerable for high performance applications such as servo motors [2]. Accordingly, various approaches have been proposed to reduce the torque pulsation [3]-[4]. As one of the most widely used approach, skewing is effective to minimize cogging torque and improve back-EMF waveform, and is often used in surface-mounted PM motors. However, the conventional skewing method has a disadvantage of reducing the maximum available torque and yielding an unbalanced axial electromagnetic force [5]. © 2015 IEEE.
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