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Individual pitch control is seen as a promising control technique for load reduction of the rotor blades in megawatt wind turbines. As the rotor blades are getting bigger and bigger, the asymmetric loads due to wind speed variations across the rotor area are increasing, too. Modern wind turbines include individual pitch actuators for every blade and the control effort is also reasonable. This is why...
A method for sensorless control of induction machines is proposed to estimate the field angle error using continuous excitation signals. Effects, which are present during a misalignment between the real world and model value, are used to estimate the error and correct it. Main flux oriented machine model equations, which take into account the magnetic anisotropies of the machine, are used to show...
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