Control of Three-Phase Induction Motor Using Back Stepping Method
Corressponding author's email:
tuonght@vlute.edu.vnKeywords:
Nonlinear control, Vector control, Asynchronous motor, Direct torque control, Backstepping controlAbstract
A three-phase induction motor is the main equipment in AC drives because of the advantages such as simple structure, solid, reliable operation, low maintenance repairs, low cost, high performance. However, the control of the induction motor is aa difficult and complicated problem because of its strong nonlinearity.
This paper applies the backstepping control technique and the direct torque control method to design a speed and flux controller for induction motors. The torque and the flux are estimated from measurement of voltages and currents of the motor.
The comparative study of the components of the motor (flux, speed, torque, three-phase current) of the proposed method (backstepping) with direct torque control (DTC) method is conducted. The comparison is done when changing the load on the motor shaft, tracking capability of speed and sensitivity to changes in operating conditions. Flux and the torque are estimated from the value of the motor current and voltage. The simulation results showed the effectiveness of the proposed method.
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