Improvement in Torque Density by Ferrofluid Injection into Magnet Tolerance of Interior Permanent Magnet Synchronous Motor

Energies

Won-Ho Kim¹  Dong-Ho Kim²  In-Jun Yang²  Si-Woo Song²  Kwang-Soo Kim³ 

[1] Department of Electrical Engineering, Gachon University, Seongnam 13120, Korea;Department of Electrical Engineering, Hanyang University, Seoul 04763, Korea;Department of Mechatronics Engineering, Halla University, Wonju 26404, Korea;

关键词: permanent magnet (PM) motor;    interior permanent magnet synchronous motor (IPMSM);    ferrofluid;    torque density;    magnet tolerance;   

DOI  :  10.3390/en14061736

来源: DOAJ

【 摘 要 】

In an interior permanent magnet synchronous motor, an adhesive such as bond is generally injected into the magnet tolerance to prevent vibration of the permanent magnet within the insertion space. In this case, a disadvantage is that the magnet tolerance does not contribute to the performance. In this paper, ferrofluid is inserted to improve the torque density, utilizing the magnet tolerance. When inserting ferrofluid into the magnet tolerance, it is important to fix the magnet because conventional adhesives are not used, and it is important that the ferrofluid does not act as a leakage path within the insertion space. In this study, a new rotor configuration using a plastic barrier that satisfies these considerations was introduced. The analysis was conducted through finite element analysis (FEA), and this technique was verified by comparing the simulation results and the experimental results through a dynamo test. It was confirmed that the no-load back electromotive force in the final model increased through ferrofluid injection.

【 授权许可】

Unknown