Title :
Analytical prediction of armature-reaction field in disc-type permanent magnet generators
Author :
Zhang, Y.J. ; Ho, S.L. ; Wong, H.C. ; Xie, G.D.
Author_Institution :
Dept. of Electr. Eng., Hong Kong Polytech. Univ., Hong Kong
fDate :
12/1/1999 12:00:00 AM
Abstract :
A two dimensional (2D) analytical method to predict the armature-reaction field in the slotted opening airgap/magnet region of a permanent magnet (PM) disc-type generator is presented. The currents in the slot are modeled by a uniform distributed current sheet along an arc at the slot opening. The analysis takes into account the harmonics in the armature current waveforms which are calculated from the voltage equations. The effects of the stator slot openings are being accounted for by the introduction of a 2D relative permeance function which is calculated directly from the nonlinear equation described by conformal transformation. A more refined permeance distribution can then be obtained easily
Keywords :
air gaps; harmonics; machine theory; nonlinear equations; permanent magnet generators; stators; 2D relative permeance function; PM disc-type generator; armature current waveforms; armature-reaction field; conformal transformation; disc-type permanent magnet generators; harmonics; nonlinear equation; permeance distribution; slot currents modeling; slotted opening airgap/magnet region; stator slot openings; uniform distributed current sheet; voltage equations; Armature; Circuit testing; Equations; Finite element methods; Harmonic analysis; Magnetic analysis; Magnetic circuits; Permanent magnets; Stator windings; Voltage;
Journal_Title :
Energy Conversion, IEEE Transactions on
