Application Paper VLT® AutomationDrive for marine winch applications www.vlt-marine.danfoss.com This Application Paper is meant to be a guideline for using Danfoss VLT® AutomationDrive in winch applications. The idea is to describe what to take into consideration for winch applications, and also to be an easy guideline for commissioning. Application description Winches are used onboard all ships for various operations. Typical use is heave-up and let-out equipment, for example a ship’s anchor, fishing trawls or hauling in mooring lines when securing the ship to a pier. Winches come in a broad variety of designs and sizes whether it is for towing or tugging, anchor handling for positioning of oil rig anchors, sub sea operations or oceanographic research. However the main elements such as the drum, brakes, clutch, gear and electrical motor have many similarities across the different designs. Increased environmental awareness is becoming more and more decisive for the type of equipment ship owners are choosing for their vessels. A result of this is the increased demand for electrical driven winches. Most manufacturers of winches offer both hydraulic and electric alternatives. Electric driven winches provide several advantages such as; substantial energy saving (up to 30%), no risk of hydraulic oil leaks, no piping, low operation noise and reduced maintenance cost. Excellent speed and tension control and advanced mechanical brake control that ease mechanical stress on both gear and brakes are other benefits. This application note describes the five most common motor configurations; single motor with and without encoder, single/ dual drives and dual motors with and without encoder, examples including installation diagram, all needed parameters and typical settings.
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