Paul & Sabrina's cheap DIY 144v motor controller

[flores]

Euuhhh..

Now what? (besides better mounting)

[MPaulHolmes]

Oh mama. So far so good. Is that with 100 motor amps for max throttle? What voltage is that at? Did you turn the hardware overcurrent trip point clockwise? You could program the motor amps to something like 500 or 600 and take a leasurely drive around the neighborhood. haha. Don't forget that there is sure to be a heating issue if the base plate isn't mounted to something that can carry the heat away. It may be fine for a while. I honestly don't know how much time it wlll take to heat up. It does have a temperature sensor which should save the day.

[MPaulHolmes]

The thing that bothers me is, the code seems to work... Like on try #1 almost. That doesn't happen. bugs may be lurking in secret places. Terrible places... Places that make the woman-folk cry out in the night. Screaming for their men to come and protect them. haha.

[flores]

That's a 150V pack..

I haven't changed anything, so it should be 100A, but I haven't measured it.
First I need to take care of the mounting, right now it will drop to the ground on movement.

[flores]

It does seem to be pulling more than 100A with all that noise... not sure..

[flores]

Change request for the controller board:

It would be nice if I could tab in to the UART on TLL level.. with a connector or something..

For that arduino plan of mine..

[MPaulHolmes]

Ooh, now that I think about it, that would be 100amp on a single IGBT. so, total motor amps would be in the neighborhood of 3*100. Don't program the motor amps to anything over, say, 400. 400 would mean 1200 total amps. I guess that counts as a bug. I feel better now. I'm not sure how the current sharing is going. I should send a code version over that shows 2 of the currents instead of just one IGBT.

[flores]

Why not of all three?

[flores]

Originally Posted by MPaulHolmes

Ooh, now that I think about it, that would be 100amp on a single IGBT. so, total motor amps would be in the neighborhood of 3*100. Don't program the motor amps to anything over, say, 400. 400 would mean 1200 total amps. I guess that counts as a bug. I feel better now. I'm not sure how the current sharing is going. I should send a code version over that shows 2 of the currents instead of just one IGBT.

Is the hardware protection also based on one current sensor?

[MPaulHolmes]

Well i'll be darned. I do have all 3 signals going to the micro. If you check all 3, maybe just make sure it's a "car jacked up" test, since there will be no temperature monitoring. I have the a/d doing 4 simultaneous conversions.