Patent ID: 6717314
Filing Date: 2004-04-06
Classification: D06F,H02K

Abstract:
An interior permanent magnet machine for use in an appliance comprising:a stator assembly defining an interior bore and defining a plurality of stator teeth; a plurality of concentrated phase windings positioned about the stator teeth; a rotor assembly positioned within the interior bore; and a plurality of magnets positioned within the interior of the rotor, wherein at least one phase winding comprises a series of at least four winding coils with each winding coil being wound about a single stator tooth, and wherein: (i) a first pair of adjacent coils of the series are wound about a first pair of adjacent stator teeth; (ii) two of the coils of the series are diametrically opposed to one another; and (iii) the at least four winding coils are wound such that when current is flowing through the at least one phase winding: (a) the first pair of adjacent coils establish electromagnets of opposing polarities, and (b) the diametrically opposed coils establish electromagnets of opposing polarities.