Re: Fuel Savings from Roadbed Electrification Pays for the PowerPlant In 14 Months

 

I think maybe you are not reading carefully and just overreacting. I
said that electric motors can be reversed, which means that they have
as much 'stopping potential' as they have starting potential.

============================================
Yep, if you can spin the wheels at start up then you can apply
the same torque stopping them. However, braking does a better
job in an emergency because most brakes can lock the wheels
even when the motive power is insufficient to spin the wheels at
startup.


No, I'm not wrong. Regenerative braking is a real effect, and with a
smart controller you will avoid losing traction.

I'm not saying it is a trivial matter to set up such a system but
there's nothing that prohibits it.
============================================
It's as simple as it can be, actually.  The back-emf that the motor
generates limits the current and if you drive the motor faster
through the shaft the current reverses, which is exactly what you
want to recharge a battery.
You do not need to reverse the direction of the motor.
For a vehicle the energy losses are overcoming air resistance
and bearing/gearbox friction. Any braking is an additional loss
as heat which cannot be recovered.



There are cables and there are cables. And we are not exerting tons of
force in this application.

-tg
===============================================
You seem to be trying to educate a complete idiot. Good luck!