Patent ID: 7166948
Filing Date: 2007-01-23
Classification: H02K,H02P

Abstract:
1. An electric motor having at least three phases, comprising: a rotor rotatable about a motor axis; a stator core assembly having a plurality of stator poles; a field winding assembly configured for single sided energization from a source and comprising a phase component winding at each said stator pole energizable from said source in a first polar sense and a phase companion winding in inductive coupling relationship with said phase component winding at each said stator pole and energizable from said source in a second polar sense opposite said first polar sense, a said phase component winding of one said phase being electrically coupled with a said phase companion winding at another said phase to provide the field windings corresponding with a commutational-step defined winding pair; and a control circuit responsive to energize said field windings from said source configured for said single sided energization of said phases to effect the driven rotation of said rotor, and commencing on said commutational step the additive coupling of at least a portion of the collapsing field energy derived at the termination of energization of the phase companion winding for one said defined winding pair with the phase component winding of another defined winding pair.