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Control of Electric Drives

Introduction: Electro-mechanical energy conversion, classification of electric drives,requirements of electric drives, four quadrant operation, selection of motors for different applications.

DC Motor Drives:DC-DC Converter fed drives, basic concepts, closed loop control, stability.

Asynchronous Motor Drives: Modeling of induction motors, reference frame theory, speed-torque characteristics, scalar control of induction motors, closed-loop operation, vector control and field orientation, sensor- less control, direct torque and flux control.

Real-time Controllers for Power Apparatus Lab

Filter implementation: Nth order IIR filter implementation, time constant relationship with sam- pling times, Nth order FIR filter implementation, memory requirements for filters, Sapling and quantization errors, outputs for different input signals.

Controllers (simulated plant): Implementation of a P controller, implementation of an I control- ler,implementation of a PI controller, implementation of a 2 DOF controller.

Advanced Power Electronics Lab - II

Familiarization of inverter modules architecture.

DC motor speed control - Speed control of DC motor with H-bridge using PWM.

Optional: Cascaded control of DC motor with inner current loop, and outer speed loop

V/f control of induction motor, sine PWM and Space vector PWM implementation with a 3- phase converter

Implementation of a single-phase PLL and a 3-phase PLL with hall-effect based voltage sen- sors and digital controllers

Analysis, Circuit design, schematics and layout of a 1-phase or a 3-phase 2-level inverter.

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