Impact of Rotor Losses in a 12-Slot 10-Pole Axial Flux PM Machine

Author

Alberti, Luigi ; Fornasiero, Emanuele ; Bianchi, Nicola ; Bolognani, Silverio

Author_Institution

Dept. of Electr. Eng., Univ. of Padova, Padova

fYear

2008

fDate

5-9 Oct. 2008

Firstpage

1

Lastpage

8

Abstract

In spite of their several advantages, the fractional-slot PM machines suffer high contents of space harmonics in the air-gap MMF distribution. The MMF space harmonic amplitude and frequency depend on the particular combination of number of slots and poles. The main consequence of such harmonic contents is the induced losses in the rotor. Moreover the slot opening can produce considerable rotor losses due the variation of permeance corresponding to the stator slots. This paper presents the impact of the rotor losses on the performance of a 12-slot 10-pole axial flux PM machine. The influence of both MMF harmonics and slot harmonics is considered. Comparisons between prediction and experimental results are included in the paper.

Keywords

harmonics; permanent magnet motors; poles and towers; rotors; 12-slot 10-pole axial flux PM machine; MMF space harmonic amplitude; MMF space harmonic frequency; fractional-slot PM machines; rotor losses; Bars; Coils; Frequency; Helium; Histograms; Machine windings; Performance loss; Rotors; Stators; Traction motors;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 2008. IAS '08. IEEE

Conference_Location

Edmonton, Alta.

ISSN

0197-2618

Print_ISBN

978-1-4244-2278-4

Electronic_ISBN

0197-2618

Type

conf

DOI

10.1109/08IAS.2008.52

Filename

4658840