Contents- Introduction of eddy current Introduction of eddy current brake Circular eddy current brake Linear eddy current brake How eddy current brake works? Advantages Disadvantages Applications Future Aspects conclusion

1. TOPIC
EDDY CURRENT
BRAKES
PRESENTED BY-
SUJATA VISHWAKARMA
B.TECH. 3RD YEAR (EEE)
BANASTHALI VIDYAPITH
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2. CONTENTS
 INTRODUCTION
 WHY WE NEED EDDY CURRENT BRAKES?
 PRINCIPLE
 CONSTRUCTION
 WORKING
 TYPES OF EDDY CURRENT BRAKES
 APPLICATIONS
 ADVANTAGES & DISADVANTAGES
 FUTURE SCOPE
 CONCLUSION
 REFERENCES
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3. WHAT IS A BRAKE?
A device for slowing or stopping a vehicle or other moving
object usually by means of friction.
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4. WHAT ARE EDDY CURRENTS?
 Eddy currents are small loops of electric current.
 Eddy current are induced by changing magnetic field.
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5. 5

6. INTRODUCTION OF EDDY
CURRENT BRAKE
Eddy current are responsible for slowing an object by
making use of opposing tendency of eddy current brakes.
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7. WHY WE NEED EDDY CURRENT
BRAKES?
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8. PRINCIPLE
Eddy current brake is based on two basic principle which
are –
FARADAY’S
LAW LENZ’S LAW
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9. LENZ’S LAW-
CASE-II When a magnet is moving away from the coil
CASE-I When a magnet is moving towards the coil
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10. CONSTRUCTION
An eddy current brake basically consist of two members:
 Stationary magnetic field
 Rotatory disc
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11. STATOR & ROTOR
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12. WORKING
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13. 13

14. 14

15. 15

16. 16

17. TYPES OF EDDY CURRENT
BRAKES
 LINEAR EDDY CURRENT BRAKES
 CIRCULAR EDDY CURRENT BRAKES
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18. LINEAR EDDY CURRENT
BRAKES
Linear brakes feature on things like rollercoasters,
where the track itself works as part of the brake.
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19. WORKING OF LINEAR EDDY
CURRENT BRAKE
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20. 20

21. CIRCULAR EDDY CURRENT
BRAKES
They come in two main kinds, according to whether the
magnet moves or stays still.
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22. WORKING OF CIRCULAR EDDY
CURRENT BRAKES
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23. 23

24. ROLLER COASTER
GYM EQUIPMENT
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25. HIGH SPEED TRAINS
INDUSTRIAL EQUIPMENT25

26. ADVANTAGES
 It is contactless , therefore no wear or tear.
 No noise.
 High brake force at high speed.
 Low maintenance.
 Light weight.
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27. DISADVANTAGES
 Braking force diminishes as speed diminishes.
 It can not be used in low speed vehicles.
 Very tough design .
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28. FUTURE SCOPE
 In future ordinary brakes will be replaced by the eddy
current brakes completely.
 By some new invention we can use eddy current brakes
for slow speed vehicles also.
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29. CONCLUSION
 Eddy current brake is a good invention for the speed
control of high speed vehicles.
 Drawback of ordinary mechanical braking system can
be overcome by application of eddy current brakes.
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30. REFERENCES
1. https://en.wikipedia.org/wiki/Brake
2. https://en.wikipedia.org/wiki/Eddy_current
3. https://en.wikipedia.org/wiki/Eddy_current_brake
4. https://www.electrical4u.com/lenz-law-of-electromagnetic-
induction/
5. https://www.electrical4u.com/faradaylawofelectromagnetic
-induction/
6. http://www.seminarsonly.com/Labels/Eddy-Current-
Brakes-PDF-Download.php
7. https://www.youtube.com/watch?v=otu-KV3iH_I
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31. THANK YOU
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