Application of fine-grained doubly oriented electrical steel to IPM synchronous motor

• Published in: IEEE transactions on magnetics Vol. 41; no. 10; pp. 4063 - 4065
• Main Authors: Tomida, T., Sano, N., Hinotani, S., Fujiwara, K., Kotera, H., Nishiyama, N., Ikkai, Y.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.10.2005; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Building materials; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Finite element methods; Iron; Iron alloys; magnetic anisotropy; Magnetic materials; Magnetism; Materials science; Other topics in materials science; Permanent magnet motors; Permeability; Physics; Sheet materials; Stator cores; stators; Steel; Synchronous motors; texture; stators; Magnetic anisotropy; Synchronous motors; Magnetic materials; Iron alloys; Microstructure; Application; Texture; Electric furnace steel; Magnetic properties
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2005.854867

Application of fine-grained doubly oriented electrical steel sheets that have a strong {100} texture to synchronous interior permanent magnet motors has been investigated. The alteration in stator core material from high grade nonoriented electrical steel sheets to the doubly oriented material with a simple change in stator design was found to lead to an increase in efficiency up to more than 2%. This efficiency increase is ascribed to a larger permeability and a lower iron loss in two perpendicular directions of the doubly oriented material. Finite-element analysis has revealed that the magnetic field distribution in stator cores made of the doubly oriented material is largely different from that in stator cores made of the nonoriented material.