Experimental study on reducing cogging torque and no-load power loss in axial-flux permanent-magnet machines with slotted winding
The axial-flux permanent-magnet machine (AFPM) topology is suited for direct-drive applications and, due to their enhanced flux-weakening capability, AFPMs having slotted windings are the most promising candidates for use in wheel-motor drives. In consideration of this, this paper deals with an expe...
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Published in: | IEEE transactions on industry applications Vol. 40; no. 4; pp. 1066 - 1075 |
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Main Authors: | , , , |
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01-07-2004
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
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Abstract | The axial-flux permanent-magnet machine (AFPM) topology is suited for direct-drive applications and, due to their enhanced flux-weakening capability, AFPMs having slotted windings are the most promising candidates for use in wheel-motor drives. In consideration of this, this paper deals with an experimental study devoted to investigate a number of technical solutions to be used in AFPMs having slotted windings in order to achieve substantial reduction of both cogging torque and no-load power loss in the machine. To conduct such an experimental study, a laboratory machine was purposely built incorporating facilities that allow easy-to-achieve offline modifications of the overall magnetic arrangement at the machine air gaps, such as magnet skewing, angular shifting between rotor discs, and accommodation of either PVC or Somaloy wedges for closing the slot openings. The paper discusses experimental results and gives guidelines for the design of AFPMs with improved performance. |
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AbstractList | The axial-flux permanent-magnet machine (AFPM) topology is suited for direct-drive applications and, due to their enhanced flux-weakening capability, AFPMs having slotted windings are the most promising candidates for use in wheel-motor drives. In consideration of this, this paper deals with an experimental study devoted to investigate a number of technical solutions to be used in AFPMs having slotted windings in order to achieve substantial reduction of both cogging torque and no-load power loss in the machine. To conduct such an experimental study, a laboratory machine was purposely built incorporating facilities that allow easy-to-achieve offline modifications of the overall magnetic arrangement at the machine air gaps, such as magnet skewing, angular shifting between rotor discs, and accommodation of either PVC or Somaloy wedges for closing the slot openings. The paper discusses experimental results and gives guidelines for the design of AFPMs with improved performance. |
Author | Capponi, F.G. Solero, L. Crescimbini, F. Caricchi, F. |
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References | ref8 di napoli (ref5) 1991; 3 ref7 ref4 ref3 li (ref9) 1998 ref6 ref10 ref2 ref1 |
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SubjectTerms | Air gaps Coils Forging Machine windings Magnetic cores Magnetic flux Stator cores Stator windings Toroidal magnetic fields Torque |
Title | Experimental study on reducing cogging torque and no-load power loss in axial-flux permanent-magnet machines with slotted winding |
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