SINGLE CURRENT SENSOR BASED SPEED SENSORLESS VECTOR CONTROLLED INDUCTION MOTOR DRIVE

摘要

The present insertion provides a system and method for speed estimation of a speed sensorless vector controlled induction motor (IM) drive. The system works with single current sensor. The system comprises a sensor mean for sensing current, said current sensor means being placed in phase with one of the phases of the motor drive; a processing unit; a current estimation unit for estimating the phase current (is�_est ); a speed estimation unit for estimating the speed of the drive; a stator resistance estimation unit for estimating and compensating the resistance of the stator in said estimated current of the drive. The sensor means sensing the phase current and computing the measured/sensed phase currents (isa) by means of the said processing unit. The stator resistance estimation unit comprises a Y-model reference adaptive system for estimating and compensating the stator resistance in said estimated current and speed estimation unit comprises an X-model reference adaptive system for estimating the speed of the drive using single current sensor.