Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1995-04-25
1996-10-08
Dougherty, Thomas M.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 52, 310 61, H02K 900, H02K 132
Patent
active
055634605
ABSTRACT:
An electrical synchronous machine of the type with smooth poles and with a constant air gap, comprising a rotor (2) in which the coils are accommodated in notches (4) extending from the periphery of the rotor and which is provided with a device of axial and if need be radial ventilation channels (8) and (9) and wherein the notches (4) over a polar pitch are directed in parallel relation to the axis of the pole and their depth (a) is chosen so as to increase the cross-section of the central zone defined by the bottoms of the notches (4) and comprising axial ventilation channels (8).
REFERENCES:
patent: 675518 (1901-06-01), Merrick et al.
patent: 881647 (1908-03-01), Alexanderson
patent: 2708724 (1955-05-01), Martin et al.
patent: 2867760 (1959-01-01), Huggard et al.
patent: 3515916 (1970-06-01), Kovacs
patent: 4301386 (1981-11-01), Schweder et al.
patent: 4948996 (1990-08-01), Archibald et al.
ABB Industrie
Butler John C.
Dougherty Thomas M.
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