This document discusses direct current (DC) motors. It defines a DC motor as a device that converts DC electrical energy into mechanical energy. It explains how DC motors operate based on Faraday's Law of electromagnetic induction and Fleming's left hand rule. Common applications of DC motors include in hazardous areas, industrial equipment, remote controls, and HVAC. New trends are brushless DC motors which overcome disadvantages of traditional DC motors and integrate the motor and drive electronics.

1. BY,
K.KASTHURI,
EEE,
JCET.

2.  DEFINITION
 CONSTRUCTION
APPLICATIONS- main
New trends in dc motor
 ADVANTAGES
 DISADVANTAGES

3. A DC MOTOR in simple words is a device that
converts direct current(electrical energy) into
mechanical energy.
ELECTRICAL MECHANICAL

4. • FARADAY’S LAW OF ELECTRO MAGNETIC
INDUCTION: whenever a conductor is moved
within a magnetic field in such away that the conductor
cuts across magnetic lines of flux, voltage is generated
in the conductor
• To determine the direction of force acting on the
armature conductors of dc motor Fleming’s left
hand rule

5. OPERATION:-
when a conductor rotates in a magnetic
field, it cuts flux.
Then produces force.

8.  In hazardous nuclear areas.
 In electric hoists ,reels , winches.
 In industrial applications.
 In remote control.
 In power switching applications.
 In HVAC mobile applications.
 In hydraulic applications
 Chemical injection applications.

10.  WORKHOUSE.
 PUMP
MECH I/P PRESSURISED FLUID POWER.
(ELECTRIC MOTOR)
 BECAUSE OF IT’S,
 VARIABLE SPEED CONTROL
 FASTER RESPONSE IN TRANSIENT CONDITION.

11. In hazardous applications:

12. In hazardous applications:-
 Type of special construction: “explosion
proof”.
 Enclosure can withstand an explosion of a gas,
vapour, dust.
 UL,CSA,NEC(National Electrical Code) -
approved.

13. DC MOTORS IN REMOTE CONTROL,
SWITCHING APPLICATIONS:-

14. In remote control:-
 Dc motor- serve vital role as “remote motor operator”.
 “TWO REMOTE CONTROL”-DC MOTOR:
are SWITCHES in electrical transmission
& receiver .
 In rail track- start place
endind place.

15. New trend in dc motor:-

16. New trend:
BLDC(brush less Dc Motor ):-experienced rapid
adoption in market place.
 Overcome traditional demerits.
Merits:
• less maintenance.
• Less cost
• High operating speed
• Less noise
• Better torqe/wt ratio.
• High performance capability.

17. In BLDC:
 TREND I:-
IMPLEMENT SENSORLESS MOTOR.
To reduce ripple.
 TREND II:
INTEGRATING BLDC &DRIVE ELECTRONICS
INTO A SINGLE PACKAGE.
minimize interconnection cables.
noise reduced
increase performance.

18. REFERANCES:
www.electrical4u.com
www.webcrawler.com
www.ohioelectronics.com

19. Any queries?

20. Thank you
friends.
By k.kasthuri.