Quote:
Originally Posted by BrianG
I don't think he's thinking that the ratio changes from forwards to brake, but rather the braking energy changes with gearing. Like if there is X amount of EMF on a given setup, but then you gear down (or up) X changes accordingly. I can see a lower geared setup generating more EMF on braking if the initial speed was the same just before braking. That would mean if the lower geared setup was at WOT before braking, then the higher geared setup would have to be somewhat less than WOT to have the same initial speed.
|
Quote:
Originally Posted by BrianG
Yeah, no matter what, a vehicle has X amount of kinetic energy "built-up" that is affected by vehicle weight and speed. If you stop on a dime, that energy will be "drained" quickly into the batteries, which results in a huge voltage and current spike, but the spike only lasts a short amount of time. If you stop gradually, that energy will be drained slowly into the batteries, which results in much lower voltage and current, but lasts a lot longer. Just like how batteries drain: pulling 500A for 10 seconds results in the same Ah draw as pulling 16.66A for 5 minutes. And just like batteries, it is pretty obvious which one is going to be harder on a setup.
|
Finally, this is what I was trying to say all along but apparantly I was not able to get this into the words that were coming out of my hands. Thanks Brian.
It was never about both cars going at different speeds.
Mike I don't use 2S1P a123 packs at all they are 2S2P, I do have 4S1P, and a couple of 3S1P packs and I change configurations all the time. I seldom run a 1P pack. And since Castle says they recommend A123 I guess they are good enough.
Sorry I was not more clear.
Jeff