2. CONTENTS:
Introduction of Eddy Current.
Introduction of Eddy Current Brake.
Working Principle.
Types of Eddy Current Brakes.
Advantages and Disadvantages.
Applications.
Conclusion.
3.
4. EDDY CURRENT:
An Eddy Current is a Swirling current
set up in a Conductor in response to
a Change in Magnetic Field.
6. EDDY CURRENT BRAKES:
It is a device used to slow a moving
object by creating eddy currents.
Braking action is made by Varying the
Strength of the Magnetic Field.
A Braking Force is possible when an
electric current is passed through the
Electromagnets.
9. FARADAY’S LAW:
It states that change in magnetic flux
induces an EMF in the circuit.
LENZ LAW:
“ An induced EMF always gives rise to a
current whose magnetic field opposes the
original change in magnetic flux”
10. WORKING:
Electromagnets produce Primary magnetic field
from supplied current which in turn produces
eddy current.
Eddy Current produces secondary magnetic field
which opposes the primary field.
Opposing magnetic field reduces the Velocity
13. CIRCULAR EDDY CURRENT BRAKES:
Brake assembly is Circular in Shape.
Consists of disc(magnetic material)
placed between the poles.
Conductor coils are wound on the poles
and when the disc rotates through the
magnetic field creates Eddy Currents.
15. LINEAR EDDY CURRENT BRAKES:
The Linear Eddy Current Brake Consists of
a magnetic yoke with Electric coils placed
along the rail.
This magnet is kept at a distance of 7m from
the rail.
When the magnet is
along the rail it generates the eddy
currents.
18. ADVANTAGES:
No wear or Tear.
No Noise or Smell.
Adjustable Brake Force.
Uses Electromagnetic force instead of
Friction.
Low maintenance.
Light weight.
19. DISADVANTAGES:
Breaking Force diminishes as Speed
diminishes.
Very Tough Design and Simulation.
No ability to hold load in Standstill position.
Acts like a Governor to reduce the Speed.
We cannot Use it for Low speed Vehicles.
20. APPLICATIONS:
In high speed trains.
In roller coaster for braking and smooth functioning.
It is also used in vehicles but still not widely used.
21. CONCLUSION:
We can make Use of Opposing
tendency of eddy current to
control the speed of High Speed
Vehicles without any Wear and
Tear.