Motor brakes or mechanical? - RC-Monster Forums

Arct1k · 01.05.2009, 05:40 PM

No - its not "working" as a motor it is working as a "generator" and hence creating elec (and heat) from the kinetic energy of the car.

shaunjohnson · 01.06.2009, 02:42 AM

sleebus,
the egle tree probably shows a voltage increase when braking because voltage drops under load...as soon as you get on the brakes the voltage is probably picking up what it was losing under load

but if the voltage spike was above it's "resting" voltage then i guess you are right

marzac2 · 06:11 AM

Quote:

Originally Posted by Arct1k

No - its not "working" as a motor it is working as a "generator" and hence creating elec (and heat) from the kinetic energy of the car.

No. The motor would only be working as a "generator" while you are "free rolling".

The moment you apply brake, you are asking the motor to stop a 9lb vehicle. And this comes at a cost = energy.

Do you believe that making a motor alone stop a 9lb vehicle, that it would not spend any energy doing so? Are you saying that it would actually re-gain energy making this happen?

_paralyzed_ · 01.06.2009, 03:42 AM

Quote:

Originally Posted by marzac2

No. The motor would only be working as a "generator" while you are "free rolling".

The moment you apply brake, you are asking the motor to stop a 13lb vehicle. And this comes at a cost = energy.

Do you believe that making a motor alone stop a 13lb vehicle, that it would not spend any energy doing so? Are you saying that it would actually re-gain energy making this happen?

Yes that's what he's saying. Have you read the entire thread?

regenerative braking is used. You cannot lose energy, only transform it. The stable temps on the mmm esc prove regenerative braking works, otherwise your esc would cook because that stopping power has to go somewhere, either as heat on a brake disc, heat on a blown esc, or back to the battery in the case of the MMM. Eagle tree graphs prove energy is regained.