Hitachi, Ltd.

Mitsubishi Hitachi Power Systems, Ltd.

Hitachi Engineering Services Co., Ltd.

Juichi Enyama

Satoshi Hirano

Akitomi Semba

Seunghwan Park

Yasuaki Kageyama

Fumihiko Goto

Ryosuke Umezu

Toshio Miyatake

A rotor coil for a revolving armature includes a strand coil that includes a part arranged in a core slot of the rotor and is composed of a plurality of element wires; and a solid coil welded to an end of the strand coil wherein the end of the strand coil and an end of the solid coil are welded by friction stir welding. A manufacturing method of a rotor coil includes the step of performing friction stir welding wherein the friction stir welding is performed for the butt joint with the end of the strand coil arranged in an advancing side defined by a rotation direction of a tool and with the solid coil arranged in a retreating side.

Friction stir welding of a solder coated strand coil to a solid coil

Rotor coil for armature of rotating machine and production method thereof

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.

Electric rotating machine and manufacturing method of the same

A generator and a method of manufacturing the generator, which can suppress a lowering of tension of a bind ring caused by an initial deformation during assembly and changes with the lapse of time during long-term operation, and can prevent a lowering of the support function. The generator includes a coil assembled in a groove formed in an iron core of a rotor and a bind ring for fixing a coil end of the coil, which is projected outward of the iron core, to a coil support. A restraint member is disposed on at least one of opposite axial ends of the bind ring to restrain the relevant end from deforming.

Generator and method of manufacturing same

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Hitachi, Japan

Juichi Enyama