Modal control of asynchronous electric drive

Abstract

Relevance of the work is caused by the need to develop high-speed closed loop induction motor, finding wide application in industry. Objective: To build a closed system frequency converter with pulse width modulated output voltage - AC induction motor with modal control. Methods: Theoretical studies were carried out with the involvement of the modern theory of electric drive and automatic control theory methods. Theoretical studies validated the model experiment. Results: The paper describes the method of forming linear equations of state of the induction motor with compensation of cross current feedback, through technical means and specifying an algorithm functioning of a closed loop system which provides the ability to calculate the coefficients of the modal controller. The authors have developed the induction motor model which takes into account the properties of discrete frequency converter with pulse width modulated output voltage. The dynamic modes of a closed system inverter - induction motor with modal control were studied in Simulink of MatLab. Conclusions: The discussed methods for building a system of induction motor with modal control can significantly increase its perfor mance under dynamic operating conditions.

Keywords

• modal controller
• asynchronous electric drive
• vector system
• pulse width modulation
• mathematical model