Design and Analysis of a Novel PM-Assisted Synchronous Reluctance Machine With Axially Integrated Magnets by the Finite-Element Method
- Authors
- Zhao, Wenliang; Xing, Fuzhen; Wang, Xiuhe; Lipo, Thomas A.; Kwon, Byung-Il
- Issue Date
- Jun-2017
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Finite-element method (FEM); magnetic torque; mises stress; permanent-magnet (PM)-assisted synchronous reluctance machine (PM-SynRM); power factor; reluctance torque; torque ripple
- Citation
- IEEE TRANSACTIONS ON MAGNETICS, v.53, no.6
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON MAGNETICS
- Volume
- 53
- Number
- 6
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/9577
- DOI
- 10.1109/TMAG.2017.2662717
- ISSN
- 0018-9464
- Abstract
- This paper presents the design and analysis of a novel permanent-magnet (PM)-assisted synchronous reluctance machine (PMA-SynRM) with axially integrated magnets for improving machine performance by using a finite-element method (FEM). The proposed PMA-SynRM features a simple structure with high performance by incorporating the advantages of a SynRM and a surface-mounted PM machine (SPMM). In particular, the rotor parts of the SynRM and SPMM are assembled to make the "q-axis" located 45 degrees (elec.) from the d-axis. Thus, the magnetic torque and reluctance torque of the proposed PMA-SynRM reach the maximum values at the same current phase angle, for efficient production of the total torque. To highlight the advantages of the proposed PMA-SynRM, a conventional PMA-SynRM is adopted for comparison under the same operating conditions. The FEM analysis results finally demonstrate that the proposed PMA-SynRM has a higher total torque and power factor, as well as greatly reduced torque ripple, when compared to the conventional PMA-SynRM with the same magnet amounts. In addition, the Mises stress analysis indicates that the configuration of the proposed PMA-SynRM exhibits the advantage of avoiding stress deterioration in the rotor ribs.
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