NDLI: Eccentricity Related Forces in Two-Pole Induction Motor With Four-Pole Stator Damper Winding Analyzed Using Measured Rotor Orbits

Content Provider	IEEE Xplore Digital Library
Author	Sinervo, A. Arkkio, A.
Copyright Year	1965
Abstract	A two-pole induction motor has been fitted with an extra three-phase four-pole stator winding to damp the unbalanced magnetic pull caused by eccentricity. In traditional two-pole induction machines, the interaction of two- and four-pole flux produces most of the magnetic forces. That force is greatly reduced if the four-pole stator winding is used to damp the four-pole flux. This causes some of the other magnetic force components to become more significant. This paper presents an estimate of what components comprise the total force on rotor and how they change when the speed, torque, and two-pole flux density of the machine are changed. The rotor is on a long flexible shaft supported by external bearings allowing the forces to move the rotor. Since the magnetic force depends on rotor eccentricity, the comparisons are done to the magnetic stiffness derived from the force. The radial movement of the rotor is measured as well as the two-, four-, and zero-pole (unipolar, homopolar) air-gap magnetic flux densities. All the results are based on measurements with a prototype test machine.
Sponsorship	IEEE Magnetics Society
Starting Page	3029
Ending Page	3037
Page Count	9
File Size	1542880
File Format	PDF
ISSN	00189464
Volume Number	49
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Rotors Force Stator windings Magnetomechanical effects Windings Magnetic forces unipolar flux Bearingless machine homopolar flux induction machine mechanical vibration rotor dynamics rotor eccentricity self-bearing machine slot harmonics unbalanced magnetic pull
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Effects of the Slot Harmonics on the Unbalanced Magnetic Pull in an Induction Motor With an Eccentric Rotor

Eccentricity Related Forces in Two-Pole Induction Motor With Four-Pole Stator Damper Winding Analyzed Using Measured Rotor Orbits

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