Title :
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
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;
Conference_Titel :
Mechatronics (ICM), 2015 IEEE International Conference on
Conference_Location :
Nagoya
DOI :
10.1109/ICMECH.2015.7084059
