Mooring winch system

Details Mooring winch system Mooring winch system

1978-10-25

1981-06-09

Truhe, J. V.

Electricity: motive power systems

With particular motor-driven load device

Tension-maintaining type of motor-control system

318802, 318809, B65H 5938, B65H 7700, H02P 534, H02P 742

Patent

active

042727065

ABSTRACT:
A mooring winch system in which automatic mooring duty is performed by a winch having an AC motor fed from the supply via a converter which includes a DC to AC inverter, the convertor producing a balanced three-phase square, quasi-square, sinusoidal or quasi-sinusoidal output. The motor thus can stall indefinitely, be driven in the sense of rope payout by tension force in the mooring rope, or run in the opposite sense to recover rope, without exceeding its rated temperature for that duty. Rope recovery is adequate both for normal duties and also where higher speeds of recovery are required and rope tension is maintained substantially constant throughout.

REFERENCES:
patent: 3421736 (1969-01-01), Ostrom
patent: 3476995 (1969-11-01), Mueller et al.
patent: 3584278 (1971-06-01), Krabbe
patent: 3671832 (1972-06-01), Salihi
patent: 3683246 (1972-08-01), Warshaw et al.
patent: 3774883 (1973-11-01), Ostrom
patent: 3872364 (1975-03-01), Hubner
patent: 4048547 (1977-09-01), Havard et al.
patent: 4078191 (1978-03-01), Morters et al.
patent: 4145645 (1979-03-01), Price et al.
D. W. Miller and R. G. Lawrence, "Variable Frequency Invertor _Motor Drives", in Electronics & Power for 10/1976 at pp. 675-678.

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