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eddy current brakes
Eddy current brakes work by generating eddy currents in a conductor when it moves through a changing magnetic field. This induces an opposing magnetic field that creates a braking force based on Lenz's law. There are two main types - circular brakes with a disc between electromagnet poles, and linear brakes using a rail and magnetic yoke. Advantages include no wear, adjustable braking, and being lightweight; disadvantages are reduced braking at low speeds and difficulty designing and simulating the system. Applications include high speed trains and roller coasters.
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eddy current brakes
- 1. EDDY CURRENT BRAKES PRESENTEDBY: M.PRIYA VANDANA P.V.SAI PRIYA
- 2. CONTENTS: Introduction ofEddy Current. Introduction of Eddy Current Brake. Working Principle. Types of Eddy Current Brakes. Advantages and Disadvantages. Applications. Conclusion.
- 4. EDDY CURRENT: AnEddy Current is a Swirling current set up in a Conductor in response to a Change in Magnetic Field.
- 5. EDDY CURRENT : CONDUCTOR FLUCTUATINGMAGNETIC FIELD VOLTAGE CURRENT EDDY CURRENT
- 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.
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- 8. WORKING PRINCIPLE: Eddy Currentbrake is based on Two basic Principles of Electromagnetics,which are Faraday’s Law Lenz Law
- 9. FARADAY’S LAW: Itstates 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 producePrimary 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
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- 12. Circular Eddy currentBrakes. Linear Eddy Current Brakes.
- 13. CIRCULAR EDDY CURRENTBRAKES: 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.
- 14. CIRCULAR EDDY CURRENTBRAKES:
- 15. LINEAR EDDY CURRENTBRAKES: 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.
- 16. LINEAR EDDY CURRENTBRAKES:
- 17. LINEAR EDDY CURRENTBRAKES:
- 18. ADVANTAGES: No wearor Tear. No Noise or Smell. Adjustable Brake Force. Uses Electromagnetic force instead of Friction. Low maintenance. Light weight.
- 19. DISADVANTAGES: Breaking Forcediminishes 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 highspeed trains. In roller coaster for braking and smooth functioning. It is also used in vehicles but still not widely used.
- 21. CONCLUSION: We can makeUse of Opposing tendency of eddy current to control the speed of High Speed Vehicles without any Wear and Tear.