Marine propulsion – Electric drive for propelling means
Patent
1995-12-07
1997-10-21
Avila, Stephen
Marine propulsion
Electric drive for propelling means
B60L 1102
Patent
active
056790457
ABSTRACT:
An arrangement for transferring electric current to a propulsion device provided with an electric motor in a ship or equivalent. The propulsion device is rotatably mounted on the ship's hull rotatable in relation to a substantially vertical axis of rotation. At the lower end of the vertical frame of the propulsion device, a lower housing is mounted in which the electric motor is arranged to drive a propeller which revolves around a substantially horizontal shaft of rotation. The current transfer arrangement includes a stationary conductor member mounted stationarily in relation to the hull of the ship and a mobile conductor member installed on the vertical frame of the propulsion device. The stationary conductor member and the moving conductor member are one of an annular part and a part of circular section arranged inside the annular part, preferably coaxially with the annular part, so that an annular intermediate space is defined between the stationary conductor member and the mobile conductor member. In the intermediate space, an electrically conductive liquid, amorphous or equivalent medium is arranged in continuous contact with the stationary conductor member and the mobile conductor member. Electric current is transferred through the electrically conductive medium from the stationary conductor member to the mobile conductor member and therefrom to the electric motor.
REFERENCES:
patent: 2834313 (1958-05-01), Frohlich
patent: 3604967 (1971-09-01), Krulls et al.
patent: 4171496 (1979-10-01), Eriksson
Aquamaster-Rauma Ltd.
Avila Stephen
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