Patent ID: 7592731
Filing Date: 2009-09-22
Classification: H02K

Abstract:
1. A rotary electric machine comprising a field winding that is wound on a plurality of field magnet iron cores, an armature having at least four magnetic poles, formed by an armature winding that is lap wound on armature iron cores and is connected in series with said field winding via a pair of positive-side brushes, a pair of connecting leads which electrically connect said armature winding to said pair of positive-side brushes, and a balance winding for reducing magnetic force unbalance effects that result from a circulating current flowing from said armature winding through said field winding; wherein said balance winding is successively wound around each of a plurality of said field magnet iron cores and is thereby held retained by said field magnet iron cores, and wherein said balance winding has a first end thereof electrically connected to and fixedly attached to a first one of said pair of connecting leads and has a second end thereof electrically connected to and fixedly attached to a second one of said pair of connecting leads.