| Description |
 Management of deck cranes provides the decision of the following problems:
A drive of movement:
The drive provides moving the crane with a speed up to 34 m / mines on a rail way in length of 80 m at an admitted roll of a vessel up to 5 degrees and an admitted trim of a vessel up to 2 degrees.
Everyone is carried out by four electric motors in rated power on 3 kw, with the built - in brakes. Nominal frequency of rotation of electric motors-1550 rev/min.
- The drive provides regulation of speed.
- With the purpose of correction of position of the crane the opportunity of work only is provided by engines of one board.
- Moving the crane to a nose and to a forage of a vessel is limited to the limit switches disconnecting electric motors of a drive of moving in extreme positions of the crane.
A drive of lifting of loads
- The drive provides rise and lowering of a cargo up to 15 т with a speed up to 4,4 m / minutes.
- The electric motor of a drive of lifting of loads - rated power of 15 kw with nominal frequency of rotation 1460 rev/min, has the built - in brake.
- The drive provides regulation of speed.
For management of deck cranes electric drives are used on the basis of asynchronous short-circuited electric motors.
Advantages of Management of deck cranes:
- Asynchronous short-circuited electric motors have a high degree of protection, high operational reliability, demand the minimal expenses for service due to absence the device;
- The lowered frequency rate of a starting current (1..1,5 Iн instead of 5.7 Iн) at preservation of the nominal starting moment of electric motors provides favorable conditions for work of ship power station;
- The wide range of regulation of frequency of rotation (0...120 %) allows to change operatively speed of moving of the crane and lifting of loads;
- The advanced system of protection and diagnostics of frequency converters provides high operational reliability of work of drives;
- Presence of the filters built - in frequency converters provides a normative level of electric handicapes and harmonious components of a pressure of a power line;
- Frequency converters are well interfaced to devices of management such as with an analog target signal.
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