Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2011-03-01
2011-03-01
Hanh, Nguyen N (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
Reexamination Certificate
active
07898138
ABSTRACT:
In a rotary electric machine, for enhancing the reliability and reducing the size thereof, the rotary electric machine comprises a stator, and a rotor opposed to the stator and adapted to be rotated around a shaft, the rotor having an iron core formed therein with a plurality of axial holes formed in the iron core, a plurality of conductor bars inserted respectively in the holes, and end rings provided at the end parts of the conductor bars, wherein the outer peripheral parts of the end rings are electrically and mechanically joined to the conductor bars through friction stir welding, and the one end part of the conductor bar is axially projected from the end ring. With this configuration, it is possible to enhance the capability of heat radiation from the rotary electric machine and to enhance the design freedom of component parts around the stator and the rotor.
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Kaihatsu Keiichiro
Obata Takeshi
Saito Ken-ichi
Antonelli, Terry Stout & Kraus, LLP.
Hanh Nguyen N
Hitachi Industrial Equipment Systems Co. Ltd.
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