Effect of stator resistance on average-value modeling of BLDC motor 120-degree inverter systems

TitleEffect of stator resistance on average-value modeling of BLDC motor 120-degree inverter systems
Publication TypeConference Paper
Year of Publication2007
AuthorsHan, Q., H. - S. Ko, and J. Jatskevich
Conference Name2007 INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS, VOLS 1-4
Pagination368-373
PublisherIEEE
Conference Location345 E 47TH ST, NEW YORK, NY 10017 USA
ISBN Number978-89-86510-08-9
Abstract

For analysis and design of electromechanical systems with brushless de motor drives, average-value modeling is often required. Many commonly used low-cost brushless dc motors operate with 120-degree inverter. The average-value modeling of such systems often ignores the commutation current and considers only the conduction interval. This paper uses a typical industrial BLDC machine to analyze the effect of stator resistance on the accuracy of a commonly used average-value model. It is shown that the model becomes less accurate for the motors with small stator resistance and significant commutation angle. However, reducing the electrical time constant of the stator winding increases the model accuracy in both time- and frequency-domains.

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