Industrial Drives and Control — Summer 2022

Draw the block diagram of Electric Drive and explain it in brief.

Explain the four function of Power Electronics Modulator in Electric Motor Drive.

Draw and Explain block diagram of single quadrant closed loop speed control of 3- Ф IM using 3-Ф AC Voltage controller.

Enlist criteria of selection of DC motor.

Explain steady state & transient stability of electric drive.

Explain the two quadrant operation of Chopper Controlled separately excited DC motor with suitable diagram.

Explain closed loop control scheme of separately excited DC motor for control of below & above base speed.

Explain single phasing in brief.

List the difference between Active and Passive Load Torque.

Explain the principle behind the variation of the speed of a 3-Ф IM by v/f method for Operation below rated frequency.

Discuss effect of harmonics on IM.

List the breaking method of Induction Motor and discuss Plugging with necessary diagram.

Explain any one method of slip power recovery scheme.

Explain the Principle of Vector control.

Enlist methods of improving power factor and explain any one in detail.

Enlist speed control methods for synchronous motor. Discuss adjustable frequency operation in brief.

Draw block diagram of feed-forward vector control for IM.

Discuss reference frame theory for induction motor in brief.

Give comparison of IM operation with balanced source voltage and unbalanced source voltage.

Analyze the Induction Motor with Non Sinusoidal source Voltages in brief.

Write Technical note on : Sinusoidal PMAC motor drive

Write a short note: Dynamic d-q model of Induction Motor1

Discuss the limitation of sub synchronous speed operation in AC Drives.

Discuss the requirement of servo motor drive in detail.

Explain the basic principle of DTFC for Voltage fed PWM inverter drives.