DC Motor presentation slide for University Students...

1. GREEN UNIVERSITY OF BANGLADESH
Presentation
On
DC MOTOR
Presented by:
Md. Nahid Hasan
ID: 161001008
Dept.: EEE
Presented for:
…………….
Lecturer

2. DC MOTOR
DC motor stands for direct current motor. A machine that
converts dc power into mechanical energy is known as dc motor.

3. OPERATING PRINCIPLE OF A DC MOTOR
 DC motors convert electrical energy into mechanical energy.
 They consist of permanent magnets and loops of wire inside.
 When current is applied, the wire loops generate a magnetic
field, which reacts against the outside field of the static
magnets.
 The interaction of the fields produces the movement of the
shaft/armature.
 Thus, electromagnetic energy becomes motion.

4. TYPES OF DC MOTORS
i. DC Shunt Motor
ii. DC Series Motor
iii. DC Compound Motor

5. DC SHUNT MOTOR
Armature

6. DC SERIES MOTOR

7. DC COMPOUND MOTOR
DC
COMPOUND
MOTOR
LONG SHUNT
COMPOUND
MOTOR
SHORT SHUNT
COMPOUND
MOTOR
CUMULATIVE
COMPOUND
MOTOR
DIFFERENTIAL
COMPOUND
MOTOR

8. DC COMPOUND MOTOR

9. APPLICATIONS OF DC MOTORS
MOTORS APPLICATIONS
DC SHUNT MOTOR
LATHES, FANS, PUMPS DISC AND BAND SAW
DRIVE REQUIRING MODERATE TORQUES.
DC SERIES MOTOR ELECTRIC TRACTION, HIGH SPEED TOOLS
DC COMPOUND MOTOR
ROLLING MILLS AND OTHER LOADS
REQUIRING LARGE MOMENTARY TORQUES.

10. ADVANTAGES OF DC MOTOR
High starting torque
Speed control over a wide range, both below and
above normal speed
Accurate seedless speed control
Quick starting, stopping

11. DISADVANTAGES OF DC MOTOR
 High initial cost
 Increased operating and maintenance cost because
of the commutator and brush gear