Loss and Thermal Analysis for High-Speed Amorphous Metal PMSMs Using 3-D Electromagnetic-thermal Bi-Directional Coupling

• Published in: IEEE transactions on energy conversion Vol. 36; no. 4; pp. 2839 - 2849
• Main Authors: Tong, Wenming, Sun, Ruolan, Li, Shiqi, Tang, Renyuan
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.12.2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Amorphous magnetic materials; Analytical models; Coils (windings); Converters; Coupling; Couplings; electromagnetic-thermal bi-directional coupling; Finite element method; High speed; Magnetic cores; Magnetic properties; Mathematical analysis; permanent magnet synchronous machines; Permanent magnets; Synchronous machines; Temperature; Temperature dependence; Temperature distribution; Thermal analysis; Thermodynamic properties; Traction motors
• ISSN: 0885-8969; 1558-0059
• DOI: 10.1109/TEC.2021.3065336

To research the impact of temperature-dependent characteristics of windings and magnets on the electromagnetic power loss and thermal properties of high-speed (HS) interior permanent magnet synchronous machines (PMSMs), an electromagnetic-thermal bi-directional coupling method (BDCM) is proposed for water-cooled HS PMSMs considering the assembling gaps between the motor components in this paper. The electromagnetic power loss is calculated by 3-D transient finite-element method and loaded into the 3-D temperature field according to the actual loss distribution, and the materials' properties are in turn updated according to the temperature distributions. The loss and temperature calculation results of a 15kW HS amorphous metal PMSM are calculated by two different coupling methods in the conditions of the rated-load sinusoidal supply and converter supply, and compared with the measured results in the case of converter supply. The results obtained by the BDCM are more consistent with the experiment results, verifying the superiority of the proposed analyzing method in improving the calculation accuracy of motor loss and temperature rise. In addition, the applicable conditions of the proposed method are also summarized in the paper.