Automotive alternator

摘要

A varnish (35) is applied to crossover portions (28b) of coil ends (28) of a stator winding such that a space factor of conductor wires (29) and the varnish (35) relative to a cross-sectional area of the crossover portions (28b) in a cross section of the crossover portions (28b) relative to a plane including an axial center of a stator core is seventy percent (70%) or more, and a ratio occupied by exposed portions of the conductor wires relative to an outer circumference of the crossover portions (28b) in the cross section of the crossover portions (28b) is fifty percent (50%) or more.