Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2006-12-07
2010-06-15
Leung, Quyen (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S216001, C310S156740, C310S156660, C310S156690, C310S156730, C310S156710
Reexamination Certificate
active
07737602
ABSTRACT:
A rotor core which has relatively high rigidity, can ensure sufficient magnetic performance, and can be produced at a cheaper cost with a relatively small-scale facility. A claw-equipped core and a yoke are manufactured separately. After fitting the yoke to a fitting portion formed in the claw-equipped core, a part of the claw-equipped core in the vicinity of the fitting portion is axially pressed to plastically flow into an annular groove formed in the yoke, thereby integrally joining the claw-equipped core and the yoke to each other. Thus, a large-scaled manufacturing facility is not required, and claws of the claw-equipped core are hard to open in the radial direction even under the action of a centrifugal force during high-speed rotation. A stator core and the claws of the claw-equipped core can be positioned closer to each other, and deterioration of magnetic performance can be avoided.
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Crowell & Moring LLP
Hitachi , Ltd.
Kim John K
Leung Quyen
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