high speed electric winch can be driven from AC or DC sources

high speed electric winch can be driven from AC or DC sources (ship's mains or dedicated diesel electric winch) and utilize the latest technology in flux vector drives. The flux vector drive converts the input power to a variable frequency AC output with full field and armature control to drive a fully sealed zero maintenance AC motor. The controls are all solid state and permit infinitely variable speed from 2% to 100% of the maximum rated RPM while providing full torque at any RPM down to zero This feature allows full rated cable tension control at zero speed. This control feature also permits direct heave compensation (when supplied with an optional heave sensor) and bottom following which can be controlled by a tow body height above bottom using input from a bottom sensor. Other drive options include direct synchronous or 2 speed AC motors, direct DC or AC supply with SCR controlled DC output driving a DC traction type motor on the winch. These systems have microprocessor based controls similar to the flux vector drives with similar features.