11-25-2009, 10:55 AM
So let's talk about dynamic brakes. I assume that pre-dynamic brake locos simply used friction brakes. And the dynamic brake is a process whereby the electric motors that are driving the wheels are actually operating as a generator which feeds a heavy amperage into a resistor load bank. And of course, the more amperage we pull from a generator, the harder it is to turn. This results in a braking action on the train without the issues of friction brakes which I suppose would get burned up pretty quickly under heavy braking loads, plus all the heat that would be placed on the braking components. With the dynamic brake, the heat is transferred to the resistor bank and a fan blows the heat out of the loco. Nothing to wear out like with the friction brakes.
But as for braking "power," regardless of the braking method, the limiting factor in stopping is going to be the friction between the rails and wheels.
Does that sound right?
But as for braking "power," regardless of the braking method, the limiting factor in stopping is going to be the friction between the rails and wheels.
Does that sound right?
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