Patent ID: 9312735
Filing Date: 2016-04-12
CPC Classification: H02K

Claim Text:
1. A stator for a rotary electric machine comprising: a stator core fixed to a case of the rotary electric machine; a plurality of winding wire coils including conducting wires and an insulating cover, the conducting wires being each covered with the insulating cover, the winding wire coils being wound on the stator core and forming a coil end protruded in an axial direction of the stator core, the winding wire coils including predetermined two winding wire coils, one winding wire coil of the two winding wire coils including a first conducting wire that is exposed by removing the insulating cover from a distal end portion of the one winding wire coil, and the other winding wire coil of the two winding wire coils including a second conducting wire that is exposed by removing the insulating cover from a distal end portion of the other winding wire coil; a joint in which the first conducting wire and the second conducting wire are joined together at the coil end and in which a proximal portion of the one winding wire coil and a proximal portion of the other winding wire coil approach each other with an acute angle between the proximal portion of the one winding wire coil and the proximal portion of the other winding wire coil so that the first conducting wire and the second conducting wire lie on each other; an insulating coat formed to enclose the joint with an insulating material, the insulating material being coated entirely over a periphery of the one winding wire coil in a circumferential direction of the one winding wire coil and entirely over a periphery of the other winding wire coil in a circumferential direction of the other winding wire coil while filling a space across which the proximal portions of the two winding wire coils in the joint form the acute angle, and wherein the insulating material is coated over both the insulating cover and the conducting wire of at least one of the proximal portion of the one winding wire coil and the proximal portion of the other winding wire coil, and wherein the proximal portion of the one winding wire coil and the proximal portion of the other winding wire coil define a wedge-shaped space between each other, and wherein the insulating material fills the wedge-shaped space, and wherein the first conducting wire and the second conducting wire are lapped together in the joint in a first direction, and at least one of the proximal portion of the one winding wire coil or the proximal portion of the other winding wire coil is bent in the first direction.