Basic Electronics and Electrical Engineering: Chapter 2: DC Machines
DC Machines: Part B Important Questions
DC Generators and Motors
Basic Electronics and Electrical Engineering: Chapter 2: DC Machines (DC Generators and Motors) : Part B Important Questions
Basic Electronics
and Electrical Engineering:
Chapter 2: DC
Machines
DC Machines (DC Generators and Motors)
IMPORTANT PART B QUESTIONS
1. Derive the e.m.f
equation of dc generator. How can its direction be obtained.
2. Describe with neat
sketches the constructional features of a dc machine, stating the material and
uses of each component.
3. Explain with neat
sketches the principle of operation of a dc generator.
4. Explain the various
types of core losses.
5. Explain in detail
the construction and operating principle of a dc generator.
6. Explain the various
types of dc motors with suitable diagrams showing the connection of field coils
to armature.
7. Explain the
principle of operation of dc motor.
8. Derive the torque
equation of a dc motor.
9. Explain the
performance characteristics of dc shunt motor. List the application of this
motor.
10. Explain torque
speed characteristics of a dc shunt and dc series motor with relevant
derivation to justify their shape.
11. Draw the torque‒speed
characteristics of all types of dc motors and explain the shape of each curves?
12. Explain the
characteristics of dc series motor.
13. Draw the circuit
diagram of any two types of DC generators. Sketch & explain the load characteristics
of these generators.
14. What are the
methods by which the speed of DC motor be controlled? Explain any one method
applied to DC shunt motor.
15. Derive the equation
for induced emf of a DC machine.
16. Explain how voltage
is built up in a self excited generator. Draw relevant figures.
17. Starting from first
principle develop the equivalent circuit of a three phase induction motor.
18. Derive the equation
of a DC Motor. How can the direction of rotation of DC motor is reversed?
19. Write the
applications of induction motors.
20. Explain the working
of a DC series generator.
Basic Electronics and Electrical Engineering: Chapter 2: DC Machines : Tag: Basic Engineering : DC Generators and Motors - DC Machines: Part B Important Questions
Basic Electronics and Electrical Engineering: Chapter 2: DC Machines
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Basic Electronics and Electrical Engineering
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