Metal working – Method of mechanical manufacture – Electrical device making
Patent
1977-10-03
1979-01-02
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
228185, 228257, H02K 1502
Patent
active
041319907
ABSTRACT:
A method of installing rotor bars in a dynamoelectric machine rotor of the type having a shaft, a laminated magnetic core carried by the shaft, with the core having a plurality of arcuately spaced longitudinal passageways therethrough for accommodating the rotor bars. The rotor bars are inserted in the core with end portions of the bars protruding beyond the end laminations at opposite ends of the core, and a pair of end rings disposed at opposite ends of the core are joined to the protruding end portions of the rotor bars. The axially facing inner end surface of each end ring has a series of arcuately spaced radially extending channels formed therein with intervening arcuately spaced radially extending ribs defined therebetween, with the channels receiving the protruding end portions of the rotor bars therein, and with the ribs bearing tightly against the end laminations at opposite ends of the laminated core to maintain the laminated core in tightly compressed condition.
REFERENCES:
patent: 1433622 (1922-10-01), Johnson et al.
patent: 2200126 (1940-05-01), Smith
patent: 3401280 (1968-09-01), Lackey et al.
patent: 3826940 (1974-07-01), McKean et al.
Hall Carl E.
Service First, Inc.
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