Patent ID: 6560854
Filing Date: 2003-05-13
Classification: H02K,Y10T

Abstract:
A method of forming a coil-wound article for an electric motor, an electric generator, or an electric alternator, comprising the steps of:a) winding a first coil by a predetermined number of laps clockwise around a first swath, counterclockwise around a second swath, and clockwise around a third swath of a plurality of hooks correspondingly provided out of a plurality of slots formed along an outer periphery of a mandrel, wherein the hooks are collapsibly protruded from within the mandrel through the slots, wherein the hooks are consecutively grouped into the first, second and third swaths, wherein said each swath at least includes a first hook, a second hook and a third hook; b) winding a second coil by a predetermined number of laps clockwise between the first and second hooks of the first swath to between the first and second hooks of the second swath, counterclockwise between the first and second hooks of the second swath to between the first and second hooks of the third swath, and clockwise between the first and second hooks of the third swath to between the first and second hooks of the first swath; c) winding a third coil by a predetermined number of laps clockwise from between the second and third hooks of the first swath to between the second and third hooks of the second swath, counterclockwise between the second and third hooks of the second swath to between the second and third hooks of the third swath, and clockwise between the second and third hooks of the third swath to between the second and third hooks of the first swath; and d) releasing the wound first, second and third coils axially from the mandrel by collapsing the hooks below the outer periphery of the mandrel, thereby forming the coil-wound article.