Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1978-12-22
1981-05-12
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 61, 310143, 310227, H02K 3908
Patent
active
042674751
ABSTRACT:
Disclosed is a current supply arrangement for an electric machine rotor winding, comprising a slip ring made of a high-strength steel, fitted onto the rotor shaft with an electrically insulating layer therebetween, and adapted to be engaged by contact brushes of current collecting bars of the contact brush device. The slip ring is provided with a cylindrical recess cut in the end face thereof and disposed coaxially with the inner opening of said ring. The recess serves to receive a distributing ring made of a material having a high electrical conductivity, and provided with a current conducting bar secured thereto and electrically connected to the rotor winding by means of current conducting screws and a number of current supplying bars. The distributing ring is adapted to make electrical contact with the slip ring through an additional electrically conductive layer made of a homogeneous material and having a resistivity lower than that of the slip ring material. The additional electrically conductive layer has a circumference with a cross-sectional area increasing as the distance along an arc beginning at the point of junction of the current conducting bar with the distributing ring increases, thereby enabling the electric current flowing through the slip ring between the brushes of the current collecting bars and the current conducting bar secured to the distributing ring to be uniformly distributed around the periphery of the slip ring.
REFERENCES:
patent: 1281862 (1918-10-01), Siegfried
patent: 1695859 (1928-12-01), Richter
patent: 2671865 (1954-03-01), Nippert
patent: 2679604 (1954-05-01), Jaeschke
patent: 2798977 (1957-07-01), Henter
patent: 3023331 (1962-02-01), Hoffmann
patent: 3639794 (1972-02-01), Karpman
patent: 3784855 (1974-01-01), Motegi
Shalaev Vladimir G.
Smirnov Gennady K.
Vitchenko Vladimir S.
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