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Analytical calculation of magnetic field distribution in the slotted air gap of a surface permanent-magnet motor using complex relative air-gap permeance
- Source :
- IEEE Transactions on Magnetics. July, 2006, Vol. 42 Issue 7, p1828, 10 p.
- Publication Year :
- 2006
-
Abstract
- We present an analytical method for calculation of no-load magnetic field distribution in the slotted air gap of a surface permanent-magnet (PM) motor with radial or parallel magnetization. The method introduces the notion of complex relative air-gap permeance, calculated from the conformal transformation of the slot geometry, to take into account the effect of slotting. As a result, an accurate solution of both radial and tangential components of the flux density can be obtained--one that shows excellent agreement with the results of finite-element simulations. As an example of the effectiveness of the model, we present calculations of the back electromotive force and the cogging torque waveforms in a surface PM motor. Index Terms--Air-gap permeance, magnetic fields, permanent-magnet motors.
Details
- Language :
- English
- ISSN :
- 00189464
- Volume :
- 42
- Issue :
- 7
- Database :
- Gale General OneFile
- Journal :
- IEEE Transactions on Magnetics
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.148185195