Abstract: A multi-class controller for a wind power generator capable of controlling the operation of the wind power generator in an optimal state under various site conditions and a wind power generation system using same are proposed. The multi-class controller includes: a sensor unit for sensing the environmental conditions of an area where the wind power generator or the power transmission unit to be controlled is installed and a state of a component constituting an object to be controlled, and generating a sensing value; and a control unit for receiving the sensing value to determine an operation state of the object to be controlled, converting a predetermined control default value for controlling the object to be controlled to a control value.

Abstract: A multi-class controller for a wind power generator capable of controlling the operation of the wind power generator in an optimal state under various site conditions and a wind power generation system using same are proposed. The multi-class controller includes: a sensor unit for sensing the environmental conditions of an area where the wind power generator or the power transmission unit to be controlled is installed and a state of a component constituting an object to be controlled, and generating a sensing value; and a control unit for receiving the sensing value to determine an operation state of the object to be controlled, converting a predetermined control default value for controlling the object to be controlled to a control value.

Abstract: A molten strand feeding device having a strand cutting apparatus. In the device, a movable unit is placed at the upper end of a cooling trough so that it is movable linearly in a direction parallel to the nozzle surface thus improving the strand cutting effect at the very beginning of the molten strand emerging from nozzles. The cooling trough is coupled to a hinged joint at the rear center and is selectively rotatable relative to the nozzle surface so that the device is selectively changed between the horizontal and vertical types. A spring-biased strand cutting apparatus is provided at the upper end of the movable unit so that the cutting apparatus is brought into close contact with the nozzle surface and smoothly moves on the nozzle surface without giving an impact on the nozzle surface, thus improving the strand cutting effect.