Electric rotating machine and manufacturing method of the same
View Patent ↗A electric rotating machine includes a rotor winding constituting a part of a rotor, a conductor provided in a center portion in a radial direction of a rotor body for supplying electricity to the rotor winding from the outside, a leader drawn from the conductor to an outside diameter side, and a connecting line constructed by stacking a plurality of conductor plates to electrically connect the rotor winding and the leader. The connecting line consists of a radial direction linear portion which is straight in the radial direction on the leader side, and a bending portion which branches into two routes toward opposite directions to each other in a rotor shaft direction from the radial direction linear portion and has a linear portion formed at a part of the bending portion. The linear portion of the bending portion is joined to a bottom surface of the rotor winding.
1. A method of manufacturing an electric rotating machine, including the steps of connecting a rotor winding constituting a part of a rotor and a leader line drawn to an outer diameter side from a conductor provided in a center portion in a radial direction of a rotor body for supplying electricity to the rotor winding from the outside, via a connecting line which is constructed by stacking a plurality of conductor plates and comprises a radial direction linear portion which is straight in the radial direction on the leader line side and a bending portion branching off into two routes toward opposite directions to each other in a rotor shaft direction from the radial direction linear portion and having a linear portion formed in a part of the bending portion, by electrically joining the linear portion of the bending portion and a bottom surface of the rotor winding, the connecting step including:
inserting a cooling structure in a hollow part formed in the bending portion of the connecting line;
subsequently, sandwiching a brazing material between the bottom surface of the rotor winding and the connecting line of the bending portion, and applying a brazing material flow inhibitor on the bending portion of the connecting line; and
subsequently, heating the brazing material to melt the brazing material while flowing a cooling medium in the cooling structure, to join an outermost layer of the conductor plates and the bottom surface of the rotor winding.
2. The method of manufacturing the electric rotating machine according to claim 1 , wherein the cooling structure comprises a cooling water tube in which cooling water flows.