Advanced Electric Drives — Winter 2021

Explain PWM converter as line side rectifier with necessary figure.

State in brief, how torque is estimated in closed loop control of electric drives.

Explain in brief, the control of Current Source Inverter with necessary diagram.

Draw and explain the equivalent circuit of a single –phase induction machine.

Describe Selected Harmonic Elimination with necessary figure.

Draw the block diagram of Electric drive and explain each block in brief.

Explain operation of Hbridge as a 4-Qdrive.

Compare DTC and FOC

State advantages of vector control over scalar control.

Compare VSI and CSI fed drives.

Write a note on Reference-frame theory, and state commonly used reference frames.

Discuss what will happen if V/f ratio is not kept constant in IM drive.

Draw and explain operation of open loop V/f control of Induction motor with PWM voltage fed converter.

List different permanent magnet motors.

Draw block diagram of synchronous motor drive.

Explain direct torque control of synchronous motor.

Draw block diagram for closed loop speed control of SRM.

List different control techniques of PMSM.

Explain CSI fed synchronous motor drives.

List various topologies of SRM drives.

Discuss PWM module in DSP.

State the eight different possible switching vectors in SVM with diagram. Describe sectors in the same.

Draw figure showing construction of any one type of BLDC motor.

Write a short note on TMSLF2407 with reference to motion control.

State names of some DSPs used in motion control and discuss the use of same.