This document discusses the construction and working of a DC generator. It describes the key components of a DC generator including the stator, rotor, armature, commutator and field windings. It also explains the basic principles of electromagnetic induction and how a DC generator works by converting mechanical energy to electrical energy using the relative motion between a coil and magnetic field according to Faraday's laws of induction. The document is intended for a course on DC generator construction and working taught at Shree Sanganabasava Mahaswamiji Polytechnic in Vijayapur, India.

1. B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC, VIJAYAPUR - 03
ELECTRICAL AND ELECTRONICS ENGINEERING DEPARTMENT
Course: DC Machines and Alternators– 15EE31T
LE/EE

2. B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
ELECTRICAL ENGINEERING DEPARTMENT
Course : DC generator construction and working Course Coordinator : Smt V.R.Kannur
UNIT- I : DC Generators construction and working
•Introduction:
•TOPICS:
•Principle of operation:
•Construction:
•Working of DC Generator:

3. B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
Course : DC generator construction and working Course Coordinator : Smt V.R.Kannur
UNIT- I : DC Generators construction and working
•Introduction:
• The Device which Converts the Mechanical Energy into Electrical Energy is called
Generator.
• There are Two types of Generators
1. D.C Generator:- The Generator which converts the Mechanical Energy into D.C Form
of Electrical Energy is called D.C Generator.
2. A.C Generator:- The Generator which converts the Mechanical Energy into A.C Form
of Electrical Energy is called A.C Generator.
• Both of the Generator Works on the Principle of Faraday’s Law of Electromagnetic
Induction.

4. B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
Course : DC generator construction and working Course Coordinator : Smt V.R.Kannur
•Principle of operation:
• In 1831, Michael Faraday, an English physicist gave one of the most basic laws of
electromagnetism called Faraday's law of electromagnetic induction.

5. B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
Course : DC generator construction and working Course Coordinator : Smt V.R.Kannur

6. B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
Course : DC generator construction and working Course Coordinator : Smt V.R.Kannur
•Principle of operation:
• All the generators work on the principle of dynamically induced emf.
• The change in flux associated with the conductor can exist only when there exists a relative
motion between the conductor and the flux.
• The relative motion can be achieved by rotating the conductor w.r.t flux or by rotating flux
w.r.t conductor. So, a voltage gets generated in a conductor as long as there exists a relative
motion between conductor and the flux. Such an induced emf which is due to physical
movement of coil or conductor w.r.t flux or movement of flux w.r.t coil or conductor is called
dynamically induced emf.
• Whenever a conductor cuts magnetic flux, dynamically induced emf is produced in it
according to Faraday’s laws of Electromagnetic Induction.

7. B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
Course : DC generator construction and working Course Coordinator : Smt V.R.Kannur
•Construction:

8. B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
Course : DC generator construction and working Course Coordinator : Smt V.R.Kannur
•Construction:
A DC generator consists of two basic parts 1. stator 2. rotor
•Stator parts:
a) YOKE: c)FIELD WINDING:
b)POLE AND POLE SHOE

9. B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
Course : DC generator construction and working Course Coordinator : Smt V.R.Kannur
•Rotor parts:
d)ARMATURE CORE: e)COMMUTATOR: f) BRUSHES:
e)ARMATURE
WINDING

10. B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
Course : DC generator construction and working Course Coordinator : Smt V.R.Kannur
•Working of DC Generator:

11. B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
Course : TDU
B.L.D.E.Association’s
SHREE SANGANABASAVA MAHASWAMIJI POLYTECHNIC VIJAYAPUR – 03
MECHANICAL ENGINEERING DEPARTMENT
Thank You
For Any Questions / Suggestions please Contact
Smt V.R.Kannur Lecturer
Electrical and Electronics Engineering Department
B.L.D.E.A’s
Shree Sanganabasava Mahaswamiji Polytechnic,
Ashram road, Vijayapur – 03
Mobile : 9731799126
9731799126
Course Coordinator : Smt.V.R.Kannur