Patent ID: 7640648
Filing Date: 2010-01-05
Classification: B33Y,H02K,Y10T

Abstract:
1. A method of fabricating a magnetic flux channel for a direct drive parallel pole transverse wound electric motor comprising the steps of: forming a first ring of plural adjacent molded magnetic flux channel first pole pieces, the plural adjacent pole pieces forming a first c-shaped recess, a top portion of first each pole piece having a width less than the width of a base portion and a length approximately double the length of the base portion for an approximately equal cross sectional area; forming a second ring of plural adjacent molded magnetic flux channel second pole pieces the second ring a mirror image of the first ring, the plural adjacent pole pieces forming a second c-shaped recess, a top portion of first each pole piece having a width less than the width of a base portion and a length approximately double the length of the base portion for an approximately equal cross sectional area to decrease magnetic flux leakage and fringing; mating the first and the second ring, each first pole piece mating with one of the second pole pieces with a gap between the top portion of the first and the second pole pieces to form the magnetic flux channel with each of the first and the second pole piece having an opposite polarity to capture flux of each rotating magnet when incorporated into the direct drive parallel pole transverse wound electric motor and the first and second c-shaped recesses mating to form a winding channel for housing a transverse phase winding; and bonding the first and the second ring with a bonding agent to form a stator assembly of the direct drive parallel pole transversely wound motor, wherein when the current through the transverse phase winding reverses the first and second parallel pole pieces switch polarity.