Yenoktaiev R. Optimization design of adjustable induction motors

The dissertation is devoted to solving problems of improving mathematical models of adjustable induction electric drives and designing special frequency-controlled induction motors. The mathematical model of an adjustable induction motor is improved, taking into account the active resistance of the magnetization branch; taking into account losses from higher space and time harmonics. Perfection of complex design mathematical models is carried out due to use of mathematical models of matching transformers and reducers, and due to in-depth modeling of the frequency converter. In addition, refinements of mathematical models were obtained using field calculations. The adequacy of the simula-tion is verified by experimental studies. Based on the system of performance indicators of common industrial induction motors, design criteria and limitations for adjustable induction motors are generated. The range criterion of the present expenses of the electric drive has been modified, which involves the use of the coefficient of operational significance and consideration of inflationary processes. The adaptation of the electromechanical part of the adjustable induction electric drive to specific operating conditions is proposed by solving the problem of multicriterion structural-parametric optimization of the motor. A comparative study was carried out on the application of various optimization methods. The possibility of improving the electric drive due to the use of adjustable induction motors is confirmed.