This letter describes a zero-speed start-up method of a speed sensorless stator-flux-oriented direct vector-controlled induction motor drive with the help of a machine current model that does not use any speed signal. The machine starts smoothly with vector control at finite developed torque and then transitions to the standard direct vector-control mode with the voltage model signals as the sp...

The paper presents a general theoretical solution oftheinduction motor speed-fluxdirect vector control, which is based on the second Lyapunov method application. structure of direct control algorithm involves use anyasymptotic flux observer with exponential stability properties. Suchapproach led to improvement system robustness A constructive procedure for designof correction termsof rotor prop...

Purpose. The main objective of this work is to demonstrate the advantages brought by use space vector modulation technique in direct torque control induction motor. To achieve purpose, two different approaches (with modulation) are proposed and studied from a comparative aspect with each other conventional control. novelty consists employment an Integral-Proportional (IP) speed controller more ...