Title :
Effects of saturation on the forces in induction motors with whirling cage rotor
Author :
Tenhunen, Asmo ; Holopainen, Timo P. ; Arkkio, Antero
Author_Institution :
Lab. of Electromech., Helsinki Univ. of Technol., Finland
fDate :
3/1/2004 12:00:00 AM
Abstract :
The effects of magnetic saturation on the radial magnetic forces in induction machines when the rotor is performing a cylindrical circular whirling motion are studied in this paper. Impulse method in the finite element analysis is used to calculate the forces and eccentricity harmonics from both the air-gap flux density and rotor currents. The forces are studied as a function of supply voltage in order to find the effects of saturation on them. The maximum radial force is found to be limited by saturation, which also couples the eccentricity harmonics together.
Keywords :
finite element analysis; induction motors; machine theory; magnetic forces; rotors; air-gap flux density; cylindrical circular whirling motion; eccentricity harmonics; electromagnetic forces; finite element analysis; force saturation; impulse method; induction machines; induction motors; magnetic saturation; radial force; radial magnetic forces; rotor currents; supply voltage; whirling cage rotor; Air gaps; Finite element methods; Harmonic analysis; Induction machines; Induction motors; Magnetic analysis; Magnetic flux; Magnetic forces; Rotors; Saturation magnetization;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2004.824549
