Optimal Flux Weakening in Surface PM Machines Using Fractional-Slot Concentrated Windings
Top Cited Papers
- 23 May 2005
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Industry Applications
- Vol. 41 (3) , 790-800
- https://doi.org/10.1109/tia.2005.847312
Abstract
A design approach is presented for achieving optimal flux-weakening operation in surface permanent-magnet (SPM) synchronous machines by properly designing the machine's stator windings using concentrated, fractional-slot stator windings. This technique makes it possible to significantly increase the machine inductance in order to achieve the critical condition for providing wide speed ranges of constant-power operation. The conditions for optimal flux weakening can be achieved while simultaneously delivering sinusoidal line-to-line back-electromotive-force waveforms and low cogging torque. A closed-form analytical model is described that can be used to design SPM machines to achieve optimal flux-weakening conditions. This technique is applied to design a 6-kW SPM machine that achieves constant-power operation over a wide speed range. Performance characteristics of this machine are compared using both closed-form and finite-element analysis.Keywords
This publication has 13 references indexed in Scilit:
- BLDC motors with surface mounted PM rotor for wide constant power operationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2004
- Winding factors and Joule losses of permanent magnet machines with concentrated windingsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Modeling of iron losses of permanent-magnet synchronous motorsIEEE Transactions on Industry Applications, 2003
- Synthesis of high performance PM motors with concentrated windingsIEEE Transactions on Energy Conversion, 2002
- Permanent-magnet machines with powdered iron cores and prepressed windingsIEEE Transactions on Industry Applications, 2000
- Rotor loss in permanent-magnet brushless AC machinesIEEE Transactions on Industry Applications, 2000
- Instantaneous magnetic field distribution in brushless permanent magnet DC motors. I. Open-circuit fieldIEEE Transactions on Magnetics, 1993
- Design of currents to reduce torque ripple in brushless permanent magnet motorsIEE Proceedings B Electric Power Applications, 1993
- Power capability of salient pole permanent magnet synchronous motors in variable speed drive applicationsIEEE Transactions on Industry Applications, 1990
- Distribution Factors and Pitch Factors of the Harmonics of a Fractional-Slot WindingTransactions of the American Institute of Electrical Engineers, 1943