Eddy Current Brakes: where to with its current?

In summary, the conversation discusses the use of old steam engines and electrical trains on the Yukon Route Railroad, specifically the use of eddy current brakes and the potential for regaining energy from the rails. The conversation also mentions thermite welding and estimates the amount of energy required for repair.
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I've seen a documentary about the Yukon Route Railroad. Some trains are run by old steam engines (with Diesel). They also equipped their engines with eddy current brakes and said, that the resulting current is conducted into resistors and via thermal energy removed into air.

I assume that modern electrical trains use their power supply to regain the currents, which isn't possible here for the lack of such. But why don't they simply use the rails instead?
 
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O(106or7kg x [O(100.5to1.5m/s]2 = how much energy? In what time frame? Thermite welding/repair of rails is four MJ/kg.
 
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Nice Fermi estimate. :smile:
 

What are eddy current brakes and how do they work?

Eddy current brakes use the principle of electromagnetic induction to create a braking force. When a conductor (such as a metal wheel) moves through a magnetic field, eddy currents are induced in the conductor, producing a magnetic field that opposes the original field. This opposing force creates the braking effect.

What are the advantages of using eddy current brakes?

Eddy current brakes have several advantages over traditional friction brakes. They do not have any physical contact with the object being braked, leading to less wear and tear and a longer lifespan. They also do not produce any noise or dust, making them a more environmentally friendly option.

Where are eddy current brakes currently being used?

Eddy current brakes are commonly used in trains, roller coasters, and other forms of transportation. They are also used in industrial applications, such as cranes and elevators, as well as in some exercise machines.

What are the limitations of eddy current brakes?

Eddy current brakes are not as effective at high speeds as friction brakes, as the induced currents are not strong enough to provide sufficient braking force. They also require a power source to create the magnetic field, which can be a disadvantage in certain situations.

What advancements are being made in the development of eddy current brakes?

There is ongoing research and development in the field of eddy current brakes, with a focus on improving their efficiency and effectiveness at high speeds. There is also interest in using them in new applications, such as in electric vehicles, to improve braking performance.

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