Analysis of d- and q-axis inductances and saliency ratios in interior permanent magnet machines with fractional-slot concentrated- windings considering harmonic effects

Author

Xiaolong Zhang ; Ronghai Qu ; Hong Chen ; Jian Luo

Author_Institution

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

fYear

2013

fDate

26-29 Oct. 2013

Firstpage

1080

Lastpage

1085

Abstract

The interior permanent magnet (IPM) machine with fractional-slot concentrated-windings (FSCW) has become a popular research topic owing to their novel structures and attracting potentials. This paper is focused on inductances and saliency ratios in IPM FSCW machines with different pole and slot combinations. Analytical expressions of inductances and saliency ratios are derived using harmonic analysis method (HAM) and their features and trends are concluded. The concept of dq-axis equivalent windings containing harmonic components is proposed to help better understand these features and trends. It explains the phenomenon that configurations with fewer stator slots and fewer winding layers have lower saliency ratio. Theoretical conclusions are verified by finite-element (FE) method.

Keywords

finite element analysis; harmonic analysis; permanent magnet machines; stators; FE method; HAM; IPM FSCW machine; d-axis inductance analysis; dq-axis equivalent windings; finite element method; fractional-slot concentrated-windings; harmonic analysis method; harmonic component; harmonic effects; interior permanent magnet machines; pole-slot combinations; q-axis inductance analysis; saliency ratio; stator slots; winding layers; Atmospheric modeling; Harmonic analysis; Inductance; Power capacitors; Rotors; Stator windings; Windings;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2013 International Conference on

Conference_Location

Busan

Print_ISBN

978-1-4799-1446-3

Type

conf

DOI

10.1109/ICEMS.2013.6754379

Filename

6754379