Patent ID: 9130416
Filing Date: 2015-09-08
Classification: H02K,Y10T

Abstract:
1. A coil arranged in a stator of a rotary electrical machine, wherein the stator includes a stator core having a plurality of slots arranged in a circumferential direction along an inner circumferential surface of the stator core, the coil comprising: a first winding portion formed by edgewise-winding a conductive rectangular wire, wherein the first winding portion includes two first slot insertion parts, which are respectively arranged in two first slots spaced apart from each other in the circumferential direction, and two first coil end parts, which connect the two first slot insertion parts, and wherein the two first slots are included in the plurality of slots of the stator; and a second winding portion formed by edgewise-winding a conductive rectangular wire that is connected to the first winding portion, wherein the second winding portion includes two second slot insertion parts, which are respectively arranged in two second slots spaced apart from each other in the circumferential direction, and two second coil end parts, which connect the two second slot insertion parts, and wherein the two second slots are included in the plurality of slots of the stator; wherein each of the first and second coil end parts includes a crank-shaped section, and the first and second winding portions are formed so that when the first and second slot insertion parts are arranged in the corresponding slots, a long side of a cross-section of the rectangular wire extends in the circumferential direction of the stator and a short side of the cross-section of the rectangular wire extends in a radial direction of the stator, and wherein, in the first winding portion, the rectangular wire of the two first slot insertion parts is arranged at radially innermost position in each of the corresponding first slot insertion parts in the slots, and in the second winding portion, the rectangular wire of the two second slot insertion parts is arranged at radially innermost position in each of the corresponding second slot insertion parts in the slots.