New trains for the Toei Mita Line

[marknewton]

Yeah, it's all good fun until the regen drops out while you're braking hard! 🤨

[gavino200]

I kind of like it. Fresh and unexpected. 

[miyakoji]

44 minutes ago, marknewton said:

Yeah, it's all good fun until the regen drops out while you're braking hard! 🤨

Is regen the same as dynamic brake?  I don’t know anything about them in practice, but I thought that being mechanically simple they’d provide reliable braking effort.  Energy generated by the traction motors is just routed to resistors, isn’t it?

[marknewton]

Regenerative brake differs from dynamic brake in that the energy created is fed back into the overhead wire. I don't know the specifics of the traction package on these trains so they may not have this problem, but on some of our trains with VVVF traction control the regen can drop out during heavy braking. 
 

Cheers,

 

Mark.

[katoftw]

Do they drop out on first heavy braking application? Or after multiple heavy braking application?