Patent ID: 8334628
Filing Date: 2012-12-18
Classification: H02K

Abstract:
1. A stator coil for an axial gap electrical rotating machine, the stator coil comprising: a plurality of first coil pieces each comprising a conductive material; a plurality of second coil pieces each comprising a conductive material; and an annular base member having recesses on two sides thereof and through holes, wherein the recesses are arranged in a circumferential direction of the annular base member and hold the first coil pieces and the second coil pieces; wherein the first coil piece comprises: a first middle bar portion; a first bent portion and a second bent portion continuous from one end of the first middle bar portion and an other end thereof, respectively, and bent at predetermined angles in the circumferential direction; a first joint portion formed at a leading end of the first bent portion; and a second joint portion at a leading end of the second bent portion, wherein the second coil piece comprises: a second middle bar portion; a third bent portion and a fourth bent portion continuous from one end of the second middle bar portion and an other end thereof, respectively, and bent at predetermined angles in the circumferential direction; a power feeding terminal connection portion formed at one leading end of either one of the third bent portion or the fourth bent portion; and a third joint portion at an other leading end of the third bent portion and the fourth bent portion; and wherein the first joint portions of one and another of the first coil pieces face and are connected to each other across the base member through the through holes, wherein the second joint of one of the first coil piece or the third joint portion of one of the second coil pieces faces the second joint portion of another of the first coil pieces and are connected to each other, across the base member through the through holes to provide a coil loop.