Effect of eddy-current loss reduction by magnet segmentation in synchronous motors with concentrated windings

Author

Yamazaki, Katsumi ; Fukushima, Yu

Author_Institution

Dept. of E. E. C. E., Chiba Inst. of Technol., Narashino, Japan

fYear

2009

fDate

15-18 Nov. 2009

Firstpage

1

Lastpage

6

Abstract

In this study, we investigate the effect of eddy-current loss reduction by magnet segmentation in synchronous motors with concentrated windings. The loss-reduction effects in each harmonic eddy currents in the magnets are analyzed by both the theoretical solution and the 3-D finite element analysis with Fourier transformation. Basic experiments using magnet specimens are carried out in order to support the calculated results. It is clarified that the loss reduction effect varies with the harmonic orders and that the effect depends on the types of the rotors, for example, interior and surface magnet types.

Keywords

Fourier transforms; finite element analysis; synchronous motors; 3D finite element analysis; Fourier transformation; concentrated windings; eddy-current loss reduction; magnet segmentation; synchronous motors; Eddy currents; Finite element methods; Magnetic analysis; Magnetic flux; Magnetic losses; Magnetic separation; Permanent magnet motors; Pulse width modulation inverters; Rotors; Synchronous motors; Eddy currents; finite element methods; harmonics; inverters; losses; magnetic field; permanent magnet machines;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems, 2009. ICEMS 2009. International Conference on

Conference_Location

Tokyo

Print_ISBN

978-1-4244-5177-7

Electronic_ISBN

978-4-88686-067-5

Type

conf

DOI

10.1109/ICEMS.2009.5382795

Filename

5382795