Modeling and simulation of direct torque control of induction motor

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Modeling and simulation of direct torque control of induction motor

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Direct torque control (DTC) is a high-performance control strategy for induction motors, offering rapid torque response and eliminating the need for complex coordinate transformations found in field-oriented control. The modeling and simulation of DTC involves several key aspects.

First, the induction motor model is developed using dynamic equations that describe the electrical and mechanical behavior of the motor. The stator and rotor flux dynamics, along with torque production, are represented mathematically to simulate real-world performance.

Next, the DTC algorithm is implemented, which directly regulates torque and stator flux magnitude by selecting optimal voltage vectors from an inverter. Unlike traditional methods, DTC does not rely on pulse-width modulation (PWM) but instead uses hysteresis controllers to maintain torque and flux within predefined bands.

Simulation plays a crucial role in validating the control strategy before hardware implementation. Tools like MATLAB/Simulink or PLECS are commonly used to model the motor, inverter, and control algorithm. Performance metrics such as torque ripple, flux tracking, and dynamic response under load variations are analyzed.

By simulating DTC, engineers can optimize switching strategies, refine control parameters, and assess robustness against disturbances—ensuring efficient and reliable motor operation in industrial applications.