Analytical prediction of the incremental inductance of the permanent magnet synchronous motors

• Published in: IEEE transactions on magnetics Vol. 40; no. 4; pp. 2044 - 2046
• Main Authors: WANG, Shyh-Jier, LIN, Shir-Kuan
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.07.2004; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Air gaps; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Inductance; Iron; Magnetic analysis; Magnetic circuits; Magnetic properties and materials; Magnetism; Permanent magnet motors; Permanent magnets; Physics; Rotors; Stators; Synchronous motors; Magnetic materials; finite-element method; iron saturation; permanent magnet synchronous; incremental inductance; Analytical method
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2004.830629

An analytical method for calculating the incremental line inductance of a permanent-magnet synchronous motor is proposed in this paper. First, the incremental inductance is simplified as a linear combination of the slot inductance and the air-gap inductance, which are both estimated by the equivalent magnetic circuits. The reluctance of the rotor back irons and the stator back irons are ignored when the slot inductance is calculated. However, for the calculation of the air-gap inductance, the iron saturations and the perturbations of the permanent magnet are considered. The proposed method is verified by a finite-element method.