Patent ID: 8461734
Filing Date: 2013-06-11
Classification: H02K

Abstract:
1. An electric motor comprising: an armature core that includes: a plurality of winding wires, each of which is wound in a plurality of layers around each corresponding one of the plurality of teeth to form a coil around the corresponding tooth and is guided out from a corresponding one of the plurality of slots on one axial side of the armature core to form a winding terminal section of the winding wire, which is continuous with the coil of the winding wire; a plurality of wire guides, each of which is provided at a radial bottom portion of a corresponding one of the plurality of slots and guides the winding terminal section of a corresponding one of the plurality of winding wires toward the one axial side of the armature core; a plurality of wire holding portions, each of which is formed separately from the plurality of wire guides and is placed on the one axial side of the armature core at a corresponding location that is located on one axial side of a corresponding one of the plurality of wire guides, which is opposite from the armature core, and is generally aligned with the corresponding one of the plurality of wire guides along an axial direction of the armature core, wherein each of the plurality of wire holding portions holds the winding terminal section of the corresponding one of the plurality of winding wires guided by the corresponding one of the plurality of wire guides; and a circuit apparatus that is placed on the one axial side of the armature core and supplies an electric current to the plurality of winding wires, wherein the circuit apparatus includes a plurality of power supply terminal elements, each of which is electrically connected to the winding terminal section of a corresponding one of the plurality of winding wires axially protruded out from a corresponding one of the plurality of wire holding portions on one axial side of the corresponding wire holding portion that is opposite from the armature core, wherein each of the plurality of winding wires includes: a wire limiter is formed at a corresponding one of the plurality of teeth, around which the first winding wire segment is wound, at a corresponding location of the tooth that is spaced from the radial bottom portion of the corresponding slot toward a radial distal end of the corresponding tooth; an inner layer of the plurality of layers of the coil of the first winding wire segment, which is placed on an inner side of an outermost layer of the plurality of layers of the coil of the first winding wire segment around the corresponding tooth, is wound at a corresponding radial location of the corresponding tooth that is located on one radial side of the wire limiter where the radial distal end of the corresponding tooth is located; and the winding end section of the first winding wire segment is guided out of the corresponding slot on the one axial side of the armature core after being wound around the corresponding tooth at a corresponding radial location of the corresponding tooth, which is located on the other radial side of the wire limiter where a radial proximal end of the corresponding tooth is located.