According to one embodiment, an armature winding includes a plurality of rectangular solid conductors and a plurality of rectangular hollow conductors, which are arranged such that tip of end portions thereof form one surface, the surface being coated with a brazing filler material, and an anti-flowing agent applied on a portion of an inner surface of each hollow conductor to prevent the brazing filler material from flowing into hollow portions of the hollow conductors.

A method comprises: a step of disposing a coil end connection portion of a first stator coil end and a solid connection at mutually adjacent positions after the solid connection and the cooling water pipe are brazed together; a step of disposing a heating coil around the solid connection and the first stator coil end in such a way as to bypass the cooling water pipe connection portion; and a step of supplying the heating coil with alternating current, so that the solid connection and the first stator coil end are induce-heated and then connected.