Static Characteristics of Doubly-salient Brushless Machines Having Magnets in the Stator Considering End-effect

Abstract This article investigates the static characteristics of both doubly-salient brushless machines having magnets in stator, namely the flux-switching permanent magnet machine (three-phase topology) and doubly-salient permanent magnet machines (including three-phase and two-phase structures), especially taking the influence of end-effect into account. The structures and operating principles are described first, and then the end-effect in the stator permanent magnet machines is investigated by a 3-D calculation, and a leakage factor reflecting end-effect is defined to modify the 2-D predicted results. The proposed approach is validated experimentally for the prototype machines.

[1]  D. Howe,et al.  Analysis of electromagnetic performance of flux-switching permanent-magnet Machines by nonlinear adaptive lumped parameter magnetic circuit model , 2005, IEEE Transactions on Magnetics.

[2]  I. Boldea,et al.  The flux-reversal machine: a new brushless doubly-salient permanent-magnet machine , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[3]  D. Howe,et al.  Analysis and Optimization of Back-EMF Waveform of a Novel Flux-Switching Permanent Magnet Motor , 2007, 2007 IEEE International Electric Machines & Drives Conference.

[4]  K. T. Chau,et al.  New Methods of Measuring Inductance of Doubly Salient Permanent Magnet Motors , 2002 .

[5]  Wei Hua,et al.  A simple method to improve the sinusoidal static characteristics of doubly- salient PM machine for brushless AC operation , 2007, 2007 International Conference on Electrical Machines and Systems (ICEMS).

[6]  K. T. Chau,et al.  Performance analysis of split-winding doubly salient permanent magnet motor for wide speed operation , 2000 .

[7]  S. E. Rauch,et al.  Design Principles of Flux-Switch Alternators [includes discussion] , 1955, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[8]  Qiang Sun,et al.  New self-tuning fuzzy PI control of a novel doubly salient permanent-magnet motor drive , 2006, IEEE Transactions on Industrial Electronics.

[9]  W. Hua,et al.  Comparison of flux-switching and doubly-salient permanent magnet brushless machines , 2005, 2005 International Conference on Electrical Machines and Systems.