Asynchronous electric machine

Details Asynchronous electric machine Asynchronous electric machine

1978-04-18

1980-07-08

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310166, 310211, H02K 1720

Patent

active

042119464

ABSTRACT:
In an asynchronous machine including a rotor of solid iron and a squirrel cage winding, the rotor is further provided with closed slots of any cross sectional shape which receive the bars of the squirrel cage winding whose upper edge is spaced from the outer surface of the rotor by a distance which is equal to the depth of penetration a of the eddy currents generated for a given starting voltage and for a slip s.gtoreq.0.8.

REFERENCES:
patent: 984582 (1911-02-01), McCollum
patent: 1610506 (1926-12-01), Fletcher
patent: 1708909 (1929-04-01), Spencer
patent: 1841122 (1932-01-01), Hoseason
patent: 1870776 (1932-08-01), Johns
patent: 1870777 (1932-08-01), Johns
patent: 2372590 (1945-03-01), Ljunggren et al.
patent: 2436414 (1948-02-01), Arnemo
patent: 2794138 (1957-05-01), Dunn, Jr.
patent: 3328616 (1967-06-01), Ringland
patent: 3509397 (1970-04-01), Diamant

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