Computation of winding inductances of permanent magnet brushless dc motors with damper windings by energy perturbation

Conference · Thu Dec 31 23:00:00 EST 1987

OSTI ID:6052746

Demerdash, N A; Hijazi, T M; Arkadan, A A

In this first of a set of three companion papers on the modeling of permanent magnet brushless dc motors, including rotor damping effects, a method is presented for the calculation of motor winding inductances. This includes damping effects due to metallic retainment sleeves and intentionally introduced damper bar (amortisseur) windings. The inductance computation method makes use of the combined energy perturbation concept and finite element field solutions. These parameters are the ones necessary is a state model presented here for the prediction of the dynamic performance of such motors with rotor damping. This modeling approach accounts for all saliency effects, and is entirely carried out in the natural abc frame of reference. Thus it facilitates the process of integration of the modeling of the motor and its associated power electronics. The approach is most effective in the design of damper bar systems for enhancement of the performance of such motors, as demonstrated in application of this approach to a 15 hp, 120 volt, 6-pole samarium-cobalt permanent magnet brushless dc motor given in this paper and two other companion papers.

• OSTI ID: 6052746
• Report Number(s): CONF-880102-
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200104* -- Fossil-Fueled Power Plants-- Components
200302 -- Power Transmission & Distribution-- DC Systems-- (1989-)
24 POWER TRANSMISSION AND DISTRIBUTION
COBALT
COMPUTER CALCULATIONS
DAMPING
DC SYSTEMS
DISTURBANCES
ELECTRIC MOTORS
ELECTRONIC CIRCUITS
ELEMENTS
ENERGY SYSTEMS
FIELD TESTS
FINITE ELEMENT METHOD
MAGNETS
METALS
MOTORS
NUMERICAL SOLUTION
PERFORMANCE
PERMANENT MAGNETS
POWER SYSTEMS
RARE EARTHS
SAMARIUM
TESTING
TRANSITION ELEMENTS