Title :
Effects of the Slot Harmonics on the Unbalanced Magnetic Pull in an Induction Motor With an Eccentric Rotor
Author :
Frauman, Pierre ; Burakov, Andrej ; Arkkio, Antero
Author_Institution :
Helsinki Univ. of Technol., Espoo
Abstract :
The slotting of electrical rotating machines creates slot harmonics of the air-gap magnetic flux density. These slot harmonics are the source of a nonnegligible part of the unbalanced magnetic pull (UMP). This paper presents analytical justifications for the use of a numerical impulse method to calculate the effects of the slot harmonics on the UMP. It uses the method to show that the force components due to the slot harmonics cannot be reduced easily.
Keywords :
air gaps; induction motors; magnetic flux; rotors; air-gap magnetic flux density; eccentric rotor; electrical rotating machines; numerical impulse method; slot harmonics; slotting; unbalanced magnetic pull; Air gaps; Finite element methods; Frequency; Harmonic analysis; Induction motors; Laboratories; Magnetic flux; Magnetic flux density; Rotors; Stators; Electrical machines; flux density harmonics; impulse method; rotor eccentricity;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.899470
