DC Generator Construction, Principles of Operation.ppt

C511.1 Understand the working principle of DC machines and its types.

C511.2 Understand the principle of operation of transformers and AC motors

C511.3 To determine the modelling of control system by applying in time
domain analysis
C511.4 To analyze the frequency response of a systems to infer its stability
C511.5 Understand the concept of P,PI PID Controllers and components of
control systems

1. ELECTRICAL MACHINES &
CONTROL SYSTEMS
Presented by,Presented by,
S.BOOBALANS.BOOBALAN
Assistant ProfessorAssistant Professor
Dept. of EEEDept. of EEE
SKCETSKCET
SRI KRISHNA COLLEGE OF
ENGINEERING AND TECHNOLOGY
Date: XX - XXXX – 2020Date: XX - XXXX – 2020

2. Google Class Room CodeGoogle Class Room Code
hitywqv
COURSE CODE : 18EE511
18EE511 ELECTRICAL MACHINES & CONTROL SYSTEMS

3. Syllabus

4. Text Books
Text Books:
1. Nagrath & Gopal, Control System Engineering, , New Age International
Edition,Fifth Edition, 2011.
2. P. S. Bimbhra, “Electrical Machinery”, Khanna Publishers, 2011.
3. A. E. Fitzgerald and C. Kingsley, "Electric Machinery”, McGraw Hill
Education, 2013.
Reference Books:
1. Benjamin.C.Kuo, Automatic Control Systems, 7th Edition – Prentice Hall of
India, 2009
2. M.Gopal, Control Systems, Tata McGraw-Hill, 2012.
3. Richard Poley, ‘Control Theory Fundamentals’,
18EE511 ELECTRICAL MACHINES & CONTROL SYSTEMS

5. AGENDA
•Energy
•Machines
•Electrical Machines
•Classifications
•DC Generator
18EE511 ELECTRICAL MACHINES & CONTROL SYSTEMS

6. Fig.1 Tharaka Mantra of Science
6
06/03/25 18EE511 ELECTRICAL MACHINES & CONTROL SYSTEMS
THARAKA MANTRA OF SCIENCE

7. 06/03/25 7
MACHINESMACHINES
ELECTRICAL ENERGY MECHANICAL ENERGY
Fig.2 Electrical Machines
18EE511 ELECTRICAL MACHINES & CONTROL SYSTEMS

8. Fig.4
Fig.5 Voltage, Photon
806/03/25
18EE511 ELECTRICAL MACHINES & CONTROL SYSTEMS

9. Fig.6 Copper Atomic Structure
906/03/25
18EE511 ELECTRICAL MACHINES & CONTROL SYSTEMS

10. Fig.7 Magnetic Flux Lines
1006/03/25
18EE511 ELECTRICAL MACHINES & CONTROL SYSTEMS

11. Fig.8 Electric Motor Principle
1106/03/25
18EE511 ELECTRICAL MACHINES & CONTROL SYSTEMS

12. Electric Motor working
Principle
Fig.9 Electric Motor working Principle
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18EE511 ELECTRICAL MACHINES & CONTROL SYSTEMS

13. DC Generator

14. Fleming’s Right-hand Rule

15. Principle
•A DC generator produces direct power
based on fundamental principle of
Faraday's laws of electromagnetic
induction. According to these laws, when a
conductor moves in a magnetic
 
field 
it
cuts magnetic lines force, due to which an
e.m.f is induced in the conductor.

16. Dc Generator Construction

17. Yoke - DC Generator

18. Poles And Pole Shoe:
Dc Generator

20. Armature Core

21. Fig.4 Rotors
2106/03/25
ROTORSROTORS
18EE511 ELECTRICAL MACHINES & CONTROL SYSTEMS

22. Commutator and Brushes

23. DC Generator

24. QUIZ
1. In case of wave wound generators, the average pitch is
a.Must be Odd
b.May be Odd or Even
c.Must be Even
d.None of the above
2.
 
For Generating large current on D.C generators which winding is generally preferred
a.Progressive wave winding
b.Lap Winding
c.Retrogressive Lap winding
d.Current depends on design
3.
 
The purpose of providing dummy coils in a generator is
a.To provide mechanical balance for the rotor
b.To reduce eddy current loss
c.To reduce hysteresis loss
d.To increase efficiency of Generator

25. 4.Which of the following quantities maintain the same direction whenever a DC machine
runs as a generator or a motor?
a.Induced emf in the armature.
b.Armature current.
c.Field current.
d.Supply current.
5.If an armature of a 4 pole DC machine has 72 slots. Find out the pole pitch
a.4
b.8
c.16
d.18
6. InterPoles winding is connected in
 
a.Series with the armature
b.Series with the main pole
c.Parallel with the Armature
d.Parallel with the main Poles
QUIZ

26. 7.The parts of the armature electric circuit which take an active part in E.M.F generation
are_____
  
a.The coil sides inside the slots
b.The overhangs
c.Both the coil sides inside the slots and the overhangs
d.The commutator segments
8. A DC generator can be termed as____
 
a.Rotating amplifier
b.Prime Mover
c.Power Pump
d.None of these
9. The yoke of a DC Generator serves for providing
 
a.mechanical support to the poles
b. cover to the whole machine.
c. path for the field magnetic flux.
d. all of above
QUIZ

28. QUIZ
https://www.objectivebooks.com/2017/02/mu
ltiple-choice-questions-with-answers.html

29. Thank you…