Computation of the voltage-driven flux-MMF diagram for saturated PM brushless motors

Miller, T.J.E., Popescu, M., Cossar, C. and McGilp, M.I. (2005) Computation of the voltage-driven flux-MMF diagram for saturated PM brushless motors. In: Industry Applications Conference, Kowloon, Hong Kong, 2-6 October, pp. 1023-1028. ISBN 0780392086

Abstract

The flux-MMF diagram or "energy conversion loop" is a powerful tool for computing the average torque of saturated permanent-magnet brushless motors, especially when the assumptions underlying classical dq theory are violated, as they often are 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 solving the voltage-driven problem together with experimental validation on a small 2-pole brushless interior-magnet motor. The paper also discusses the general conditions when this method is appropriate, and compares it with alternative approaches.

• Item Type: Conference Proceedings
• Keywords: Computation, Control, Conversion, Flux-Mmf Diagram, Magnet Synchronous Motor, Motor, Motors, Operation, Permanent-Magnet Brushless Motors, Permanent-Magnet Brushless Motors, Torque Calculation, Finite-Element Method, Simulation, Torque
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Popescu, Dr Mircea and Cossar, Mr Calum and Miller, Prof Timothy and McGilp, Mr Malcolm
• Authors: Miller, T.J.E., Popescu, M., Cossar, C., and McGilp, M.I.
• Subjects: T Technology > TA Engineering (General). Civil engineering (General)
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Publisher: Institute of Electrical and Electronics Engineers
• ISSN: 0197-2618
• ISBN: 0780392086
• Copyright Holders: Copyright © 2005 Institute of Electrical and Electronics Engineers
• First Published: First published in Industry Applications Conference, 2005. Fourtieth IAS Annual Meeting. Conference Record of the 2005. 2:1023-1028
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher