Mooring winch and a method for controlling a cable of a mooring winch

A mooring and winch technology, applied to clockwork mechanism, hoisting device, ship, etc., can solve the problems of ship damage, mooring rope failure, personnel danger, etc.

Active Publication Date: 2010-06-16
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of large movements, the mooring lines may lose their effect, as a result, danger to persons in the vicinity and risk of damage to the ship

Method used

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  • Mooring winch and a method for controlling a cable of a mooring winch
  • Mooring winch and a method for controlling a cable of a mooring winch
  • Mooring winch and a method for controlling a cable of a mooring winch

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Embodiment Construction

[0029] figure 1 A mooring winch according to one embodiment of the invention is shown. The mooring winch includes a drum 101 for winding a mooring rope 102, and an AC motor 103 for driving the drum. The AC motor may be, for example, an induction motor or a permanent magnet synchronous motor. figure 1 The mooring winch 1 shown has a gearbox 106 arranged between the alternating current motor 103 and the drum 101 . The drum is supported by the gearbox and bearing housing 108 . Depending on the dimensioning of the AC motor and the dimensioning of the mandrel, it is also possible to have a direct drive mandrel without a gearbox. The mooring winch includes a frequency conversion device 104 that supplies electric power to an AC motor 103 . The frequency conversion device is connected to a power grid 107, which may be, for example, an on-board power grid. The mooring winch comprises a control unit 105 arranged to control the frequency conversion means dependent on the indication ...

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Abstract

An electrically driven mooring includes a winding drum (101), an alternating current motor (103) arranged to drive the winding drum, a frequency conversion unit (104) connected to the alternating current motor, and a control unit (105) arranged to control the frequency conversion unit on the basis of an indicator for tension of the mooring rope. The control unit is arranged to compute a flux space vector for modelling a stator flux of the alternating current motor, to compute a torque estimate on the basis of the flux space vector and a space vector of stator currents, and to use the torque estimate as the indicator for the tension of the mooring rope. Hence, a need for a force sensor on the mooring rope and a need for a speed / position sensor on the motor shaft can be avoided.

Description

technical field [0001] The invention relates to a method of controlling the tension of a mooring line of a mooring winch. In addition, the invention relates to mooring winches and a computer program for controlling the tension of the mooring lines of the mooring winches. Background technique [0002] When a ship is mooring along a quay or berth in a port, the mooring lines anchoring the ship must be properly tensioned to hold the ship in place. If no effort is made to maintain the correct tension on the mooring lines, dangerous situations can arise as the vessel tends to move relative to the quay, placing high forces on the mooring lines. There are various factors that can cause a boat to move relative to a pier or mooring embankment. These factors may be, for example, changes in water level due to cyclical changes in tide, vessel movements due to loading and / or unloading of cargo. These factors will cause the ship to change position relative to the quay and thus will cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66D1/74B66D1/52
CPCB66D1/505B63B21/16B66D1/46
Inventor M·霍姆伯格V·郑
Owner ABB (SCHWEIZ) AG
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