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Industrial Drive Questions Bank
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Diploma Electrical 5th Sem

Industrial Drive Questions Bank

UNIT-1:

  1. What is an electric drive system? (2023 March)
  2. Neatly draw the block diagram of an electric drive system. (2023 March)
  3. Point out some areas of application of electric drive. (2023 March)
  4. Why is the electric drive system preferred over the mechanical drive system? (2023 March)
  5. State advantages of squirrel cage induction motors over DC motors. (2023 March)
  6. Write a short note on duty cycles.
  7. Describe the load characteristics of DC shunt and Series motor.
  8. Describe the load characteristics of Three phase induction motor and Single phase induction motor..
  9. Name the braking methods of DC motors. Explain any one of them.
  10.  Describe the methods of speed control of three phase induction motor and dc motor.

UNIT-2:

  1. Write short note on followings:
  1. DC servo motor. (2023 March)
  2. AC Servo motor
  3. Brushless DC motor (2023 March)
  4. Stepper Motor (2023 March)
  5. Hall sensors (2023 March)

UNIT-3:

  1. Explain working of following with relevant circuit diagram, waveform and expression
  1. Single phase Semi converter fed separately excited dc motor (2023 March)
  2. Single phase full converter fed separately excited dc motor (2023 March)
  3. Three phase Semi converter fed separately excited dc motor
  4. Three phase full converter fed separately excited dc motor
  5. Three phase dual converter fed separately excited dc motor
  6. Chopper Controlled DC Drives for dc series motor

UNIT-4:

  1. Describe the Slip Energy Recovery of an Induction Motor(Static Scherbius Drive).
  2. Describe the Rotor Resistance Control of an Induction Motor.
  3. Compare between AC drives and DC drives. (2023 March)
  4. Compare between static Kramer’s drive and static Scherbius drive of 3-phase induction motor. (2023 March)
  5. Describe the working VVVF with VSI and CSI.
  6. Explain the working of synchronous motor drive.

UNIT-5:

  1. Neatly sketch & label control circuit and power circuit of Automatic star-delta starter. (2023 March).(6)
  2. Neatly sketch & label control circuit and power circuit of reversing the direction of rotation of induction motor with Interlocking systems (2023 March).(6)
  3. State two limitation of star-delta starter.(2023 March)
  4. Neatly sketch & label control circuit and power circuit of Automatic Sequential control of motor and DOL starter.
  5.  Draw and explain AC/DC motor drive using a Microcontroller block diagram.
  6. Draw and explain AC/DC motor drive using a Microprocessor block diagram.
  7. Explain the phase locked loop in dc motor speed control using block diagram.