Title :
Analytical prediction of cogging torque in spoke type permanent magnet motors
Author :
Lin, D. ; Zhou, P. ; Cendes, Z.J.
Author_Institution :
Ansoft Corp., Pittsburgh, PA
Abstract :
An analytical method is presented for calculation of no-load magnetic field distribution in the slot-less and slotted air gap of a spoke-type permanent magnet (PM) motor. The slot-less air-gap field and the relative air-gap permeance considering the effects of the slots are derived from the conformal transformation. The analytical field solutions are used to predict the cogging torque of an 8-pole, 48-slot spoke-type PM motor. The computed cogging torque using this method is compared with the 2D finite element analysis (FEA) results.
Keywords :
air gaps; finite element analysis; permanent magnet motors; torque; 2D finite element analysis; air-gap permeance; cogging torque; slotted air gap; spoke type permanent magnet motors; Air gaps; Finite element methods; Forging; Laplace equations; Magnetic analysis; Permanent magnet motors; Rotors; Shape; Stator cores; Torque;
Conference_Titel :
Electrical Machines, 2008. ICEM 2008. 18th International Conference on
Conference_Location :
Vilamoura
Print_ISBN :
978-1-4244-1735-3
Electronic_ISBN :
978-1-4244-1736-0
DOI :
10.1109/ICELMACH.2008.4799933
