This document discusses the four main types of DC motors: shunt, series, compound, and permanent magnet. It provides details on their applications and operating principles. Shunt motors are used for applications requiring variable speed control like drilling and fans. Series motors provide high starting torque and are used for applications like cranes and lifts. Compound motors have characteristics of both shunt and series motors, providing both good speed regulation and high starting torque for uses such as conveyors and presses. Permanent magnet DC motors do not require a field coil and are used in applications requiring low maintenance like toys and disk drives.

2. There is 4 different
type of Circuit DC
motor known as:
1- shunt DC MOTOR

3. 2-Series DC
MOTOR

4. 3- Compound
DC MOTOR

5. 4-Permanent
magnet DC
MOTOR

6. 1- shunt DC MOTOR
Wiper
Automatic
windscreen
Drills Conveyors Fans Boring mills Shapers Blowers
Spinning
and
weighing
machine
Centrifugal
pumps
APPLICATION OF SHUNT Dc motor:

7. When the DC motor was first introduced to the drilling
industry offshore, the desire to have positive control of
motor speed and a minimum of problems with the
application led the driller to the shunt-type of motor
design. Sometimes referred to as a separately excited
motor because the field is supplied power separately
from the armature, the shunt motor provides variable
speed by adjusting its armature voltage.
Drills:

8. 2-Series DC MOTOR
Cranes
Air
compressor
Lifts Elevators
Winching
system
Electric
traction
Hair drier
Vacuum
cleaner and
in speed
regulation
application
power tools
Sewing
machine
Electric
footing
Application of series Dc motor:

9. Elevators:
DC is typically preferred for easier RPM control; they typically use two-speed three-phase AC motors and speeds
are changed by switching the number of poles. dc motor provide high starting torque with less transients also it
enables to vary the speed at different ranges and easy control with armature voltage control and flux control. for ac
induction motor, if u change the number of poles, it increases the synchronous speed of the motor to control the
speed it requires external auto transformer. The motor component of the elevator machine can be either a DC
motor or an AC motor. A DC motor had a good starting torque and ease of speed control. An AC motor is more
regularly used because of its hardness and simplicity. A motor is chosen depending on design intent for the elevator.

10. 3-Compound DC MOTOR
Presses
Electric
shovels
Reciprocating
machine
Conveyors
Stamping
machine
Elevators Compressors Rolling mills
Heavy
planners
Application of Compound Dc motor:

11. Conveyors:
a conveyor belt is used in power plant industries as well as in any assembly line. A huge
load is driven by the conveyor belt so the motor needs a very high starting torque
greater than its running torque. The DC series motor operated with very high starting
torque, but the DC series motor has very poor speed and voltage regulation and can't be
run at no load condition. The speed control of the DC series motor can not be done
smoothly.
DC series motor was used until the 3-phase induction motor drives were not applicable.
Modern days for the conveyor belt system we use a double cage 3-phase induction
motor. The secondary cage is used to make the starting current very low and starting
torque very high.
This motor provides starting torque higher than its running torque.

12. 4-Permanent magnet DC
MOTOR
Washer
Windshield wiper
Automobiles as a starter motor
Personal computer disc drives
Toys
Wheelchairs
Blowers in heater and air conditioners.
application of Permanent magnet Dc motor:

13. Toys:
• As in a permanent magnet DC motor, the
armature is placed inside the magnetic field of
a permanent magnet; the armature rotates in
the direction of the generated force. Each
conductor of the armature experiences a force,
and the compilation of those forces produces a
torque, which tends to rotate the armature. The
supply voltage to the armature will have
armature resistance drop and the rest of the
supply voltage is countered by the back emf of
the motor.
the advantages of a PMDC motor are:
1. No need of field excitation arrangement.
2. No input power in consumed for excitation
which improve efficiency of DC motor.
3. No field coil hence space for field coil is saved
which reduces the overall size of the motor.

14. some of the most prominent
advantages of DC motors
1
They are suitable
for low-speed
torque
2
They have
adjustable speed
3
They offer a wide
range of speed
control both
below and above
the rated speed
4
They have a very
high and strong
starting torque
5
They are used in
appliances such
as electric trains
and cranes
having
overwhelming
burdens in the
beginning
conditions
6
They are more
affordable
7
Their
maintenance is
easy and takes
little to no time

15. New type
of different
Dc motor

16. Questions?