Title :
Calculation of stray losses due to distorted flux density waveforms of DC motors operated by chopper control circuits
Author :
Jamil, M.K. ; Demerdash, N.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Clarkson Univ., Potsdam, NY, USA
Abstract :
A computer-aided modeling approach to the prediction of the armature current waveforms of chopper-operated permanent magnet DC motors is presented. The model is used to separate the effect of AC ripple in the current on the ohmic losses from the ohmic losses due to the DC component. Thus the effects of the chopper on stray-load losses can be determined. This approach was further used to compute the effect of choppers on the magnetic armature core losses in such motors, and hence on stray core losses. Whenever feasible, supporting experimental work was performed to obtain data to verify some key computed parameters and performance results. Conclusions are drawn regarding the effects of chopper operation on such permanent magnet DC motors
Keywords :
DC motors; electric machine analysis computing; losses; machine theory; permanent magnet motors; AC ripple; armature current waveforms; chopper control circuits; electric machine analysis computing; machine theory; magnetic armature core losses; model; ohmic losses; permanent magnet DC motors; stray losses; Choppers; Core loss; DC motors; Frequency; Instruments; Magnetic circuits; Magnetic separation; Permanent magnet motors; Predictive models; Thyristors;
Conference_Titel :
Energy Conversion Engineering Conference, 1989. IECEC-89., Proceedings of the 24th Intersociety
Conference_Location :
Washington, DC
DOI :
10.1109/IECEC.1989.74516
