Jens Nørkær Sørensen, Professor at the Technical University of Denmark
Let’s take a closer look at some of the sensors used in the yaw control system. Potentiometers,encoders and ultrasonic sensors may be used to detect wind direction. A potentiometer is a variable resistor consisting of a resistive strip, 3 terminals, and a movable wiper. The movable wind vane is connected to the wiper. As the…
The yaw ring assembly fits in a machined groove in the nacelle main frame casting. Several studs are inserted to locate the ring as it is lowered into the groove. The ring is lifted and carefully lowered into position. The remaining studs are inserted and run down. Spacers are added, then nuts are installed and…
You will be surprised to know that the first known wind turbines recorded in history were Vertical axis wind turbines, not the current dominant technology of horizontal axis wind turbines. This dates back to the 7th century B.C when vertical axis windmills were built on the Persian land. They were based on the aerodynamic drag…