Title :
Analytical Prediction of Cogging Torque for Spoke Type Permanent Magnet Machines
Author :
Lin, D. ; Zhou, P. ; Lu, C. ; Lin, S.
Author_Institution :
Ansys Inc., Pittsburgh, PA, USA
Abstract :
A generalized analytical field solution by conformal transformation is presented for calculation of no-load magnetic field distribution in the slot-less and slotted air gap of spoke-type permanent magnet (PM) machines. These analytical field solutions are used to predict the cogging torque of spoke-type PM motors. The computed cogging torque using the proposed method is compared with the results from 2D finite element analysis (FEA) in three application examples.
Keywords :
finite element analysis; machine insulation; permanent magnet motors; 2D FEA; 2D finite element analysis; cogging torque analytical prediction; conformal transformation; generalized analytical field solution; no-load magnetic field distribution; slot-less air gap; slotted air gap; spoke-type PM motors; spoked type permanent magnet machines; Air gaps; Forging; Permanent magnet motors; Rotors; Stator cores; Torque; Analytical field solution; cogging torque; conformal transformation; permanent magnet machine;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2172193
