Patent ID: 7391136

Claim:
A rotary electric machine, comprising: a rotor, which rotates together with a rotating shaft, disposed inside a housing; a stator core fixed to the housing and having an inner circumferential face facing the circumferential periphery of the rotor across a radial air gap, two opposite end faces, and multiple slots formed at a predetermined pitch around the inner circumferential face; and a stator winding having an in-slot conductor part disposed in the multiple slots and two coil end parts disposed on the outer sides of the end faces, wherein: the in-slot conductor part includes multiple in-slot conductors disposed in the multiple slots and each of the coil end parts includes multiple coil end conductors continuously connecting together the in-slot conductors disposed in different slots on the outer sides of the end faces so that the in-slot conductors are connected continuously around the rotating shaft, in each of the multiple slots a plurality of the in-slot conductors are disposed in a line in the depth direction of the slot, in at least one of the two coil end parts each of the coil end conductors has a root part led out through a slot opening at one of the end faces in substantially the same direction as the extension direction of the in-slot conductors and a connecting part farther from said one of the end faces than the root part and bent so as to form a bridge between two root parts, at said one of the end faces, at each of the slot openings, the root parts continuous with the in-slot conductors inserted into the slot are disposed in a line in the depth direction of the slot and form a root part line, on either side of each of the root part lines is formed a cooling passage extending along said one of the end faces in the depth direction of the slot, on the outer side of the root part lines the connecting parts of the coil end conductors overlap forming an end cylindrical part, on the end cylindrical part an insulating member is disposed to cover at least the outer surface of the cylindrical end part, each of the root parts of the coil end conductors project by a predetermined length from said one of the end faces, and the insulating member covers the connecting parts of the end conductors but does not cover the root parts so that the cooling passages are formed between said one of the end faces and the insulating member with a width corresponding to the predetermined length.