SYSTEM FOR SPEED-SENSORLESS CONTROL OF AN INDUCTION MACHINE

摘要

A system for speed-sensorless control of an induction machine includes a fluxregulator and torque current calculator for operating the machine in a heavilysaturated state to produce a saturation induced saliency; a saliency trackerfor tracking an angle of the saturation-induced saliency; a signal injectorfor injecting an AC signal aligned with a saliency axis; voltage and currentdeterminers for determining stator voltages and currents; and a rotor fluxcalculator for using the saturation-induced saliency angle, the determinedstator voltages, and the determined stator currents to determine a magnitudeand a location of a rotor flux vector. The flux regulator and torque currentcalculator is adapted to use the rotor flux vector to control the inductionmachine.