Groove depth determination based on extended leakage factor in a 12-slot 10-pole machine

Author

Bonkil Koo ; Minhyeok Lee ; Kwanghee Nam

Author_Institution

Dept. of Electron. & Electr. Eng., POSTECH, Pohang, South Korea

fYear

2015

fDate

6-8 March 2015

Firstpage

680

Lastpage

684

Abstract

Presence of subharmonic components is a common feature of fractional slot machines, and the subharmonic is a main cause of rotor PM eddy current losses. As an effort to reduce the fundamental component of a 12-slot 10-pole motor, flux barriers are provided by making grooves on the back iron. The optimal groove depth ratio is found based on a extended (weighted) leakage factor by harmonic distance from the working harmonic number. The extended leakage factor reflects the PM loss by each harmonic component. The result is verified via finite element analysis (FEA).

Keywords

eddy current losses; finite element analysis; permanent magnet motors; rotors; 12-slot 10-pole machine; 12-slot 10-pole motor; FEA; back iron; extended leakage factor; finite element analysis; flux barriers; fractional slot machines; fundamental component reduction; groove depth determination; harmonic distance; optimal groove depth ratio; rotor PM eddy current loss; subharmonic components; weighted leakage factor; working harmonic number; Air gaps; Harmonic analysis; Iron; Rotors; Stator windings; Windings; Magnet Loss; air-gap space harmonics; flux-barrier; fractional slot machine; leakage factor;

fLanguage

English

Publisher

ieee

Conference_Titel

Mechatronics (ICM), 2015 IEEE International Conference on

Conference_Location

Nagoya

Type

conf

DOI

10.1109/ICMECH.2015.7084059

Filename

7084059