Research on Magnetic-Thermal Coupling of High-Permeability Soft Magnets in SynRMs

Synchronous reluctance motors (SynRMs) without rare Earths have attracted the attention of many researchers as rare Earth permanent magnet materials are being consumed in large quantities and prices are increasing. In this article, a high-permeability core material, Fe-Ni alloy (1J50), is proposed f...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2024-09, Vol.60 (9), p.1-5
Main Authors: Li, Jun, Ge, Jiahao, Li, Yuxiao, Li, Zhiye, Qin, Yiwei, Zeng, Lubin, Pei, Ruilin
Format: Article
Language:English
Subjects:
Coercive force
Couplings
Electric motors
Feasibility studies
Ferrous alloys
Fe–Ni alloy (1J50)
High temperature
Magnetic fields
Magnetic flux
Magnetic permeability
Magnetic properties
Motors
Permanent magnets
Permeability
Rare earth elements
Reluctance
Silicon steels
synchronous reluctance motors (SynRMs)
Temperature
Temperature sensors
Thermal coupling
Torque
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Summary:Synchronous reluctance motors (SynRMs) without rare Earths have attracted the attention of many researchers as rare Earth permanent magnet materials are being consumed in large quantities and prices are increasing. In this article, a high-permeability core material, Fe-Ni alloy (1J50), is proposed for SynRMs. With the property of ultrahigh permeability, it is able to increase the convex pole ratio of SynRMs at lower magnetic field intensity, thus improving the torque performance of the motors. To further verify the feasibility of 1J50 in SynRMs, a magneto-thermal coupling experimental setup was established in this paper, and variable frequency and variable temperature tests were conducted on 1J50 and conventional silicon steel (CSS). It is found that the permeability of 1J50 is higher than that of CSS, and it is quite sensitive to high-frequency magnetic fields. The permeability of 1J50 gains an enhancement and the loss tends to decrease under high-temperature conditions. The results of the study were also applied to the motor model to effectively increase the motor's reluctance torque by 15.89% and verify the feasibility of the material.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2024.3401459