Braking in Trains | Regenerative Brakes | Air Brakes | Mechanical Brakes | Dynamic Braking

Express trains have attained speeds of 80 Kmph since as early as the 1860s. Therefore efficient braking has always been a necessity. Modern trains use a dynamic braking system which is a blend of mechanical braking and electric brake systems which rely on reversing the traction motors to electric generators. In this video I start by explaining how air brakes work in trains. I follow this up by conceptually explaining working of regenerative brakes in electric locomotives and electric trains

[basavraj]

your video @ 3.10/4.48, says "Motor will run in the opposite direction for Regenerative", but actually NOT. while driver apply the brakes, the motor acts as a generator (in the same direction) and generates regenerative power which will fed back to other trains via OHL/3rd rail

[Techno-Universal]

However older electric trains that were mostly manufactured before the 1960s shorted the electrical current generated by the motors through metal resistive elements under or above the train carriages and I believe this was mostly because of technical limitations at the time not making sending that additional energy back into the overhead lines a viable option! I also believe some modern trains have similar resistance coils but they are only there for the purpose of disposing of additional current if there’s not enough of a load on the overhead lines from other trains to use all of the regenerated energy! :)

[jagathindianrailwayslover]

Now I understood Working of Dynamic braking systems ❤

[dreamcatcher]

Always good to watch your videos and learn. Thumbs up!!

[nuwanweerakkody]

very good explanation thanks, moving trees disturbs the animation.

[wilfredalexandercoelho]

Very well explained but will have to listen to it several times to get more acquainted with this mode of operation . Thanks a lot. This is only to have some sort of General knowledge of these Locomotives. Also can an Electric Locomotive travel on the reverse direction or is it only a uni direction that the driver has to operate from the Left side of the Locomotive?

[emmanuvel.j]

Sooperb video. Please explain how these brakes works on bogie

[aakashyadav]

Plz explain regenerative braking system in Diesel locos.

[AmythJambhavdekar]

Still I have a Lehman question.. since dynamic braking is limited only for loco.. isn't is risky since the coaches behind keeps on pushing loco in forward direction which can result in sliding the loco??

[sujitkale]

I have a doubt how can the current goes back to catenary wire because current only flows in one direction.

[Job-ty]

How the motor switches to reverse mode when the train moves forward

[david-stewart]

Excellent video! Could you please tell me the background music that was used?

[btarunr]

I know it's already mentioned in the loco-specific videos, but it would have been pertinent to explain dynamic braking on diesel-electric locomotives that support them (i.e. energy from the TMs going into resistor grids that turn them into thermal energy that's vented out by a fan).

[kbehdxy]

What about the harmful dust from the brakes and the iron in the dust from the disc

[RailFan]

Great Video, Can you make a video on different types of coupling used in Indian Railways

[catwarrior]

Great information! Thanks for the video. But is it the same in diesel-powered trains/ locomotive?

[mamtasinha]

Thank you sir as I am a student of class 7 I have to make a project on breaking system so this project was very helpful 😃😇

[mdibrahimkazi]

Good information. Please can you make a video on WCAS series locomotives.

[edwinmoronia]

If the power supply is 750volts, how much is returned to catenary considering the 11 to 12 percent of generated voltage?

[mariebcfhs]

fun fact
Diesel hydraulic locomotives can also have dynamic braking, by using a hydraulic retarder