Block diagrams of a doubly fed inductor motor as a control object

To design the electric drives with the doubly fed inductor motor it is required to have the mathematical models of these motors. For this, one should have the mathematical models in the transfer functions form. The basic motor model is non-linear therefore, it should be linearized using the Taylor series. A block diagram is created according to the obtained system of linearized equations. Then the sequential transformation of this block diagram is performed with a gradual decrease in the number of contours. The block diagrams can be used to obtain the motor transfer functions with the arbitrary combination of input quantities (the amplitude, voltages, the frequencies of two voltages) and output quantities (the speed and the rotation angle).