Thyristor control system for asynchronous motor.

Abstract

An astatic system for controlling the speed of an asynchronous motor without a feedback sensor is described. The slip frequency signal carries engine speed information. Regulation is carried out from the side of the rotor using a switch with forced quenching. The speed setting is set by the frequency of the master oscillator. The power tristors are controlled from a ring distributor, and the damping ones are controlled by three block waiting devices ... .. generators. The control range when using the master oscillator of the laboratory type was 1: 100. The factors affecting the stability of maintaining speed are analyzed. Conducted a harmonic analysis of the rotor current. Expressions for the harmony coefficients and functions of the load angle, slip frequency and machine parameters are obtained. Figures 4. Bibliographic references 3.