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Analysis of Magnetic Gearing Effect in Partitioned Stator Switched Flux PM Machines.
- Source :
-
IEEE Transactions on Energy Conversion . Dec2016, Vol. 31 Issue 4, p1239-1249. 11p. - Publication Year :
- 2016
-
Abstract
- The partitioned stator switched-flux permanent magnet (PM) (SFPM) (PS-SFPM) machine is a novel stator-PM machine in which PMs and armature windings are separately placed in two different stators. Compared with the conventional SFPM machine with a single stator in which both PMs and armature windings are located, the PS-SFPM machine can generate higher torque density due to the utilization of the machine's inner space. In this paper, the magnetic gearing effect in the PS-SFPM machine is investigated in terms of air-gap field harmonics based on a simple magnetomotive force (MMF)-permeance model. It is found that the PS-SFPM machine is one type of magnetically-geared machine, in which the modulations of rotor iron pieces to the open-circuit PM and armature reaction fields are similar to those found in the magnetic gear and the conventional magnetically geared machine. The pole-pair numbers and rotating speeds of the air-gap field harmonics obtained by the MMF-permeance model are verified by finite element (FE) analysis. More than 93% of the average electromagnetic torque is contributed by the main air-gap field harmonics having pole-pair numbers (2i - 1)\boldsymbol p PM and \rm| N\rm{r} \,\pm \, (2<bold>i</bold>-1)<bold>p</bold>PM| (<bold> i</bold> = 1,2,3) in a PS-SFPM machine with <bold>p</bold>PM-pole-pair PMs and <bold>Nr</bold>-rotor-pole. A prototype machine is fabricated and tested to verify the FE analysis. [ABSTRACT FROM PUBLISHER]
- Subjects :
- *PERMANENT magnets
*STATORS
*MAGNETIC flux
Subjects
Details
- Language :
- English
- ISSN :
- 08858969
- Volume :
- 31
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Energy Conversion
- Publication Type :
- Academic Journal
- Accession number :
- 119770863
- Full Text :
- https://doi.org/10.1109/TEC.2016.2590988