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

Journal Article · Wed Sep 01 00:00:00 EDT 1999 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)

DOI:https://doi.org/10.1109/20.799071· OSTI ID:20000591

Wang, J P; Lieu, D K

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.

• Research Organization: Univ. of California, Berkeley, CA (US)
• OSTI ID: 20000591
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers), Vol. 35, Issue 5Pt3; Other Information: PBD: Sep 1999; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ELECTRIC MOTORS
PERFORMANCE
MECHANICAL VIBRATIONS
NOISE
PERMANENT MAGNETS
MATHEMATICAL MODELS
ROTORS