Core Loss Modeling for Permanent-Magnet Motor Based on Flux Variation Locus and Finite-Element Method

• Published in: IEEE transactions on magnetics Vol. 48; no. 2; pp. 1023 - 1026
• Main Authors: Huang, Yunkai, Dong, Jianning, Zhu, Jianguo, Guo, Youguang
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.02.2012; Institute of Electrical and Electronics Engineers
• Subjects: Core loss; Cross-disciplinary physics: materials science; rheology; Eddy currents; Exact sciences and technology; finite-element method (FEM); flux locus; Hysteresis motors; Induction motors; Iron; Magnetic cores; Magnetic hysteresis; Materials science; Other topics in materials science; permanent-magnet (PM) motor; Physics; Finite element method; Iron loss; Core loss; permanent-magnet (PM) motor; Permanent magnets; Modelling; Powder metallurgy; Engines; finite-element method (FEM); Magnetic properties; flux locus
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2011.2174201

Core-loss prediction is an important issue in design and analysis of permanent-magnet (PM) motors. Because of the diverse structure, flux distribution, and rotational variation of flux, it is difficult to predict the core loss in a machine exactly. In this paper, a core-loss model for the PM motor is introduced in which flux variation loci in different parts of the motor are predicted by carrying out a finite-element transient analysis. Since the flux variation pattern is complicated, an improved equation based on the conventional three-term expression is used for core-loss calculation. The core-loss model is developed totally in ANSYS parametric design language as a parametric model and it can be used easily for different types of PM motors. Calculation and experiments on a high-speed PM motor have shown that the model can produce results that agree with the experimental ones.