INFLUENCE OF INTERNAL AND CROSS FEEDBACKS ON THE DYNAMICS OF A FREQUENCY REGULATED ASYNCHRONOUS ELECTRIC DRIVE

Abstract

The ability to control the instantaneous values of the flux linkage and the motor torque makes it possible to realize high-speed drives with high control accuracy in the steady state and transient modes. The equations of an asynchronous engine are obtained in a coordinate system x, y rotating at a synchronous speed, whose real axis is oriented along the rotor flux linkage. Based on the above equations, a structural diagram of an asynchronous motor in a synchronously rotating coordinate system oriented along the rotor flux linkage vector is obtained. A functional scheme for controlling the moment and flow of an asynchronous motor based on AVI with PWM and a block diagram of a frequency-controlled asynchronous electric drive based on AVI-PWM has been developed.