Patent ID: 8069555
Filing Date: 2011-12-06
Classification: H02K,Y10T

Abstract:
1. A method of manufacturing a three-phase, four pole electric motor, the method comprising the steps of: winding a first first phase coil group and a second first phase coil group from a first wire, wherein said first first phase coil group and said second first phase coil group are members of a first first phase pole pair; inserting said first first phase coil group and said second first phase coil group into a first subset of a plurality of stator slots; winding a first second phase coil group and a second second phase coil group from a second wire, wherein said first second phase coil group and said second second phase coil group are members of a first second phase pole pair; inserting said first second phase coil group and said second second phase coil group into a second subset of said plurality of stator slots; winding a first third phase coil group and a second third phase coil group from a third wire, wherein said first third phase coil group and said second third phase coil group are members of a first third phase pole pair; inserting said first third phase coil group and said second third phase coil group into a third subset of said plurality of stator slots; winding a third first phase coil group and a fourth first phase coil group from a fourth wire, wherein said third first phase coil group and said fourth first phase coil group are members of a second first phase pole pair; inserting said third first phase coil group and said fourth first phase coil group into a fourth subset of said plurality of stator slots, wherein at least a portion of said third first phase coil group overlays a portion of said first second phase coil group and a portion of said first third phase coil group, and wherein at least a portion of said fourth first phase coil group overlays a portion of said second second phase coil group and a portion of said second third phase coil group; winding a third second phase coil group and a fourth second phase coil group from a fifth wire, wherein said third second phase coil group and said fourth second phase coil group are members of a second second phase pole pair; inserting said third second phase coil group and said fourth second phase coil group into a fifth subset of said plurality of stator slots, wherein at least a portion of said third second phase coil group overlays a portion of said first first phase coil group and a portion of said first third phase coil group, and wherein at least a portion of said fourth second phase coil group overlays a portion of said second first phase coil group and a portion of said second third phase coil group; winding a third third phase coil group and a fourth third phase coil group from a sixth wire, wherein said third third phase coil group and said fourth third phase coil group are members of a second third phase pole pair; inserting said third third phase coil group and said fourth third phase coil group into a sixth subset of said plurality of stator slots, wherein at least a portion of said third third phase coil group overlays a portion of said first first phase coil group and a portion of said first second phase coil group, and wherein at least a portion of said fourth third phase coil group overlays a portion of said second first phase coil group and a portion of said second second phase coil group; forming a first inter-pole connection between said first first phase coil group and said third first phase coil group; forming a second inter-pole connection between said first second phase coil group and said third second phase coil group; and forming a third inter-pole connection between said first third phase coil group and said third third phase coil group.