High-torque low-torque-ripple fractional-slot PM-motors

Author

Salminen, P. ; Niemelä, M. ; Pyrhönen, J. ; Mantere, J.

Author_Institution

Lab. of Electr. Eng., Lappeenranta Univ. of Technol.

fYear

2005

fDate

15-15 May 2005

Firstpage

144

Lastpage

148

Abstract

A performance analysis of different fractional slot machines is given. It is searched suitable fractional slot constructions for a machine with 225-frame size, 45 kW power and a speed of 400 rpm. These are values that are typically applied in paper machines. The aim is to find machines, which have the capacity of producing high torque as well as low torque ripple. Fractional slot motors, with concentrated windings, have been studied with a 2D finite element method and analytical methods. The torque ripples were studied as a function of the relative magnet width. A 45 kW prototype motor has been build and measured to verify the computation results

Keywords

finite element analysis; machine windings; paper making machines; permanent magnet machines; torque; 2D finite element method; 45 kW; concentrated windings; fractional slot constructions; fractional-slot PM-motors; high torque; low torque ripple; paper machines; relative magnet width; Air gaps; Finite element methods; Iron; Machine windings; Magnetic analysis; Manufacturing; Permanent magnet machines; Prototypes; Torque; Wounds;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Machines and Drives, 2005 IEEE International Conference on

Conference_Location

San Antonio, TX

Print_ISBN

0-7803-8987-5

Electronic_ISBN

0-7803-8988-3

Type

conf

DOI

10.1109/IEMDC.2005.195715

Filename

1531333