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Thứ sáu, 07 Tháng 11 2014

Frequency drives

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Chuyên mục : Frequency drives
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We use frequency drives in situations where the rpm of AC electric motor should be controlled. When greater power is required liquid-cooled drives are applied. Beside the standard frequency drives, there are also AFE (Active Front End) drives, which can feed the released brake energy back to the power net. Moreover, several frequency drives can be linked together through a so-called “Common DC-bus”, so that the brake energy could be transmitted from one drive to another that is connected to the same bus.


Recent projects, in which we have applied this:


Matador-Matador 2: replacement of Ward Leonard drives by frequency drives: two AFE input, four hoisting winches, one top winch, five mooring winches and one runner winch.


Four cutter suction dredgers (IHC): one cutter, one underwater pump, seven winches
Two PSV’s: two propulsions, two loading pumps

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