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Title: Magnetic lumped parameter modeling of rotor eccentricity in brushless permanent-magnet motors

Abstract

Vibration, giving rise to acoustical noise, is an important index of motor performance. The unbalanced force due to rotor eccentricity caused by manufacturing imprecision or bearing defects is one possible source of excitation to vibration. The previously developed fast design package for permanent magnet motors, based on magnetic lumped parameter modeling, is modified to predict the influence of rotor eccentricity. Both static and dynamic cases are investigated. Magnetic material nonlinearity is taken into consideration. A two-dimensional relative permeance function is derived by conformal transformation followed by the modification of permeances modeling the air gap. Static and dynamic rotor eccentricity bring different effects to symmetric and asymmetric motors and are discussed separately.

Authors:
;
Publication Date:
Research Org.:
Univ. of California, Berkeley, CA (US)
OSTI Identifier:
20000591
Alternate Identifier(s):
OSTI ID: 20000591
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)
Additional Journal Information:
Journal Volume: 35; Journal Issue: 5Pt3; Other Information: PBD: Sep 1999; Journal ID: ISSN 0018-9464
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; ELECTRIC MOTORS; PERFORMANCE; MECHANICAL VIBRATIONS; NOISE; PERMANENT MAGNETS; MATHEMATICAL MODELS; ROTORS

Citation Formats

Wang, J.P., and Lieu, D.K. Magnetic lumped parameter modeling of rotor eccentricity in brushless permanent-magnet motors. United States: N. p., 1999. Web. doi:10.1109/20.799071.
Wang, J.P., & Lieu, D.K. Magnetic lumped parameter modeling of rotor eccentricity in brushless permanent-magnet motors. United States. doi:10.1109/20.799071.
Wang, J.P., and Lieu, D.K. Wed . "Magnetic lumped parameter modeling of rotor eccentricity in brushless permanent-magnet motors". United States. doi:10.1109/20.799071.
@article{osti_20000591,
title = {Magnetic lumped parameter modeling of rotor eccentricity in brushless permanent-magnet motors},
author = {Wang, J.P. and Lieu, D.K.},
abstractNote = {Vibration, giving rise to acoustical noise, is an important index of motor performance. The unbalanced force due to rotor eccentricity caused by manufacturing imprecision or bearing defects is one possible source of excitation to vibration. The previously developed fast design package for permanent magnet motors, based on magnetic lumped parameter modeling, is modified to predict the influence of rotor eccentricity. Both static and dynamic cases are investigated. Magnetic material nonlinearity is taken into consideration. A two-dimensional relative permeance function is derived by conformal transformation followed by the modification of permeances modeling the air gap. Static and dynamic rotor eccentricity bring different effects to symmetric and asymmetric motors and are discussed separately.},
doi = {10.1109/20.799071},
journal = {IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)},
issn = {0018-9464},
number = 5Pt3,
volume = 35,
place = {United States},
year = {1999},
month = {9}
}