Performance estimation of interior permanent-magnet brushless motors using the voltage-driven flux-MMF diagram

Miller, T. J. E., Popescu, M., Cossar, C. and McGilp, M. I. (2006) Performance estimation of interior permanent-magnet brushless motors using the voltage-driven flux-MMF diagram. IEEE Transactions on Magnetics, 42(7), pp. 1867-1872. (doi: 10.1109/TMAG.2006.874512)

Abstract

The flux-magnetomotive force (flux-MMF) diagram, or "energy conversion loop," is a powerful tool for computing the parameters of saturated interior permanent-magnet brushless motors, especially when the assumptions underlying classical dq theory are not valid, as is often the case in modern practice. Efficient finite-element computation of the flux-MMF diagram is possible when the motor current is known a priori, but in high-speed operation the current regulator can lose control of the current waveform and the computation becomes "voltage-driven" rather than "current-driven." This paper describes an efficient method for estimating the motor performance-average torque, inductances-by solving the voltage-driven problem. It presents experimental validation for a two-pole brushless interior permanent-magnet motor. The paper also discusses the general conditions under which this method is appropriate, and compares the method with alternative approaches.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Miller, Prof Timothy
• Authors: Miller, T. J. E., Popescu, M., Cossar, C., and McGilp, M. I.
• Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Research Group: SPEED
• Journal Name: IEEE Transactions on Magnetics
• Publisher: Institute of Electrical and Electronics Engineers
• ISSN: 0018-9464
• Copyright Holders: Copyright © 2006 Institute of Electrical and Electronics Engineers
• First Published: First published in IEEE Transactions on Magnetics 42(7):1867-1872
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher