摘要：The paper is aimed at the performance analysis of a sensorless direct torque control (DTC) strategy dedicatedto four-switch three-phase inverter (FSTPI) fed induction motor (IM) drives. This strategy has beenconsidered in an attempt to improve induction motor drive reliability, compactness and cost-effectiveness,which represent crucial requirements in electric and hybrid propulsion systems. These requirements could beachieved thanks to the substitution of the conventional six-switch three-phase inverter (SSTPI) by thereduced structure four-switch three-phase inverter (FSTPI). A model reference adaptive system (MRAS)-based speed estimator has been found suitable for the proposed sensorless DTC strategy in so far as it involvesthe same induction motor model, that is the Clarke model. It has been found through simulation work thatthe introduced sensorless DTC strategy exhibits high performance during transient and steady stateoperations.
关键词：Sensorless direct torque control strategy; induction motor; four-switch three-phase;inverter; reliability; compactness; cost-effectiveness; simulation.
