Title :
Variation of torque constant with armature current in brushless PM motors
Author :
Deodhar, R.P. ; Staton, D.A. ; Miller, T.J.E.
Author_Institution :
SPEED Lab., Glasgow Univ., UK
Abstract :
This paper examines the phenomenon of armature reaction and its effect on the torque per ampere characteristic or torque constant-kT-in brushless PM motors. In order to take account of saturation, finite element analysis is used together with the flux-MMF diagram. The technique of the flux-MMF diagram makes accurate prediction of instantaneous as well as average torque in both linear and saturated electric machines. The predicted results are presented along with the experimental data for a squarewave brushless DC and a sinewave brushless AC motor
Keywords :
brushless DC motors; finite element analysis; machine theory; machine windings; magnetic flux; permanent magnet motors; torque; armature current; armature reaction; average torque prediction; brushless PM motors; finite element analysis; flux-MMF diagram; instantaneous torque prediction; linear machines; saturated electric machines; saturation; sinewave brushless AC motor; squarewave brushless DC motor; torque constant; torque constant variation; torque per ampere characteristic;
Conference_Titel :
Electrical Machines and Drives, 1995. Seventh International Conference on (Conf. Publ. No. 412)
Conference_Location :
Durham
Print_ISBN :
0-85296-648-2
DOI :
10.1049/cp:19950903
