Optimization of Double Inverter-Feed Drive Work According to Minimum of Dynamic Error Criteria

There are many semiconductor inverters used to control the speed of wound rotor induction motors. To obtain a large starting torque and rigid mechanical characteristics, two regenerative inverters on the stator and rotor sides are installed. The rotation speed of the motor shaft by the output voltages frequency difference of the inverters is determined. The disadvantage of such control is the nonlinear dependence of torque on current, which leads to a drop in the power of the electric drive and decreases quality of energy characteristics. When using classical regulators, this problem could not be eliminated and requires the use of more complex control systems. One approach is to use the Kudin method based on the dynamic programming method. When using this method, partial problems of analytical design for a linear system are solved, and then “stitched” nonlinear control with cubic components is obtained. In this work, this problem was solved in the presence of two nonlinear dependencies. In addition to the nonlinear dependence of torque on current, the limitation at the output of the speed controller was taken into account, which made it possible to limit power consumption. The advantages of the nonlinear controller were confirmed by digital simulation using MATLAB software.