Motor braking.

[zeropointbug]

Originally Posted by BrianG

I highly doubt that. To get the truck moving it takes X energy. All that energy taken from the batteries does not make it to the wheels because of losses in the batteries, ESC, and motor. The same is true for taking motion and converting it to electricity; there will always be losses. So, you will never be able to take full advantage of kinetic energy.

Minus losses...

I meant whether or not you can only get roughly half (half wave rectifiy), or full bridge rectification? As it would be a sine wave generated, correct?

[BrianG]

Originally Posted by zeropointbug

Minus losses...

I meant whether or not you can only get roughly half (half wave rectifiy), or full bridge rectification? As it would be a sine wave generated, correct?

lol, leapfrogging posts!

I believe it would be full-wave rectification. Each phase would need two diodes for this, which the FETs supply depending on how they are turned on. The result would be a signal that would look like the lower center part of the picture below (borrowed from ntd-ed.org):

[zeropointbug]

Yeah, exactly. Does it have enough diodes though for this?

I just tried out motor shorting with drill, i used a 3/8 drill on 7XL, all I did was popped some 5.5mm female plugs on motor plugs and held them together. I spun the drill up and then pushed them together, good spark, but rpm's dropped by about 40%, which is alot considering. It was hard to hold onto as well. The motor was slowly getting warm, I did it for about 10 seconds. The connectors were getting very warm, almost hot, probably because from the resistance from them touching only very little.

Also, when I stopped the drill, it stopped almost immediately, normally is spins down a while...

From what I observed, it was far more than enough to flip a MT over, and easily stop it.