Simulation of Emergency Modes in Sensorless Control of Switched Reluctance Motor Drives

Abstract

This article is continuation of the authors' research of sensorless control of drives with a switched electric motor, in which the phase switching positions are determined by comparing the calculated and measured values of the flux linkage. This study is dedicated to the influence of deviations of the settings of the considered algorithm on the possibility of developing anomalous modes in the drive. Under certain conditions, a progressive accumulation of errors appears when determining the switching position. To identify these conditions, a simulation model of the drive was developed in MATLAB - SIMULINK. Simulation showed that the most adverse situation in the operation of the drive arises with certain deviations of the algorithm's tuning parameters from their calculated values and distortions in the shape of the switching line. In some cases, such a combination can lead to a disruption in the sequence of switching on the phases, or even to a sharp increase in the phase current of the motor.