Permanent magnet alternator

Core stock for forming a helically wound stator core of the type having radially outwardly extending teeth, said core stock comprising a magnetically permeable strip having one edge and an other edge and further having a plurality of regularly spaced teeth formed in said one edge thereof, a plurality of inwardly directed arcuate regions formed in said other edge opposite said teeth, and a plurality of straight regions in said other edge substantially between said teeth.

A stator core comprising an elongate magnetically permeable strip having first and second edges and a plurality of regularly spaced teeth formed in said first edge and a plurality of inwardly directed arcuate regions formed opposite said teeth in said second edge, said strip being helically wound into a substantially radially symmetrical solid with said first edge outermost so that said teeth extend radially outwardly from said solid and said second edge defines a substantially cylindrical hollow region, said inwardly directed arcuate regions serving to facilitate helical winding of said magnetically permeable strip by reducing material stretch in said teeth as said metallic strip is helically wound, said stator core further comprising an adapter disposed at one end of said radially symmetrical solid, said adapter having a first end defining a helical ramped surface formed at said one end of said substantially radially symmetrical solid and having a second end configured for coupling to a prime mover having a shaft, said adapter thereby serving to coaxially align said radially symmetrical solid with the shaft of the prime mover.