Title :
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.
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;
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
DOI :
10.1109/IEMDC.2005.195715
