An Improved Analytical Model for Inductance Calculation of Interior Permanent Magnet Machines

Author

Hong Chen ; Dawei Li ; Ronghai Qu ; Zhe Zhu ; Jian Li

Author_Institution

State Key Lab. of Adv. Electromagn. Eng. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan, China

Volume

50

Issue

6

fYear

2014

fDate

Jun-14

Firstpage

1

Lastpage

8

Abstract

This paper proposes an improved analytical model to calculate the inductances of interior permanent magnet (IPM) machines, equipped with either fractional slot concentrated windings or distributed windings. A modified stator magnetic motive force expression is also presented firstly. It has been proven that the normal method for inductance calculation by airgap permeance function and winding function is not accurate enough for IPM machines. The improved analytical model is competent to predict the distribution of the armature-reaction magnetic field and inductances accurately. Several finite element analysis (FEA) models have been built, and a prototype has been designed and tested. Results by the improved analytical model are verified by both FEA and experimental results.

Keywords

finite element analysis; inductance; permanent magnet machines; stators; airgap permeance function; armature-reaction magnetic field; distributed windings; finite element analysis; fractional slot concentrated windings; improved analytical model; inductance calculation; interior permanent magnet machines; modified stator magnetic motive force expression; winding function; Analytical models; Inductance; Magnetic analysis; Magnetic flux; Rotors; Stators; Windings; Fractional slot concentrated windings (FSCWs); Inductance; fractional slot concentrated windings (FSCW); inductance; interior permanent magnet (IPM); magnetic potential;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2298375

Filename

6704747