3 Optimal reversal points: active controls to preserve the mechanics … … and to make efficient use of the prevailing wind forces From lifting movement to electrical energy The whole mechanism used to turn the wind power into electrical energy is integrated in the central column on the DualWingGenerator. The column also contains the sensor technology, which helps to optimise the mechanical movement and enable it to be adapted to the wind conditions in an energy-efficient manner. If air flows towards the system, the central column turns automatically and always directs the wings, made of carbon, at right angles to the oncoming wind. The flow of air thereby acts on the aerofoils of the wings, which are lined up at an appropriate angle by the servomotors. This leads to the slides moving up and down on the axle with the wings, which produces the opposing movement of the wings. The movement is synchronised in opposite directions using a timing belt, which transfers the force to two bearing shafts. These rotary movements are rectified by means of free wheels and transferred to the generator using another timing belt. The wind power thus generates firstly kinetic and finally electrical energy. Whilst the wings are moved by the oncoming wind, the system only has to provide power for the two servomotors and for the CPX control system, which is installed under the central column. Higher system efficiency due to tandem wings The utilisation of two pairs of wings with only one central column allows the wing area to be doubled – with the mechanical layout remaining the same and hence the same friction. This increases the area of wind contact in relation to the mechanism and hence the efficiency of the system. The opposing tandem wings neutralise the bearing torques from the upwards and downwards motion. In the middle, the wings get so close that a suction effect is created between the aerofoils, which enables a higher level of effectiveness. When the wings move towards each other, the air between them speeds up. In turn, this acceleration creates a drop in pressure, which pulls the two aerofoils together and thus further increases the energy yield. Highly complex controls: coordinated correcting variables for greater plant efficiency and process reliability Free wheel Spring element Timing belt on ELGG axis Timing belt for the generator Generator Position sensor ELGG axis Cable routing Servomotors
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