Paul & Sabrina's cheap DIY 144v motor controller - Page 429 - Fuel Economy, Hypermiling, EcoModding News and Forum

MPaulHolmes · 02-04-2011, 03:06 PM

This is the expected behavior! Whoo hooo!!!!! It ramps up to 100% duty because it's trying to make the current match the throttle, but the current is zero. It feels nice in a car, but on the bench, it looks a little weird.

flores · 02-04-2011, 03:07 PM

Great... on to the powersection.. waiting for the caps in backorder.

MPaulHolmes · 02-04-2011, 03:13 PM

Why does it take them like 10 months to order something? Those bozos.

flores · 02-04-2011, 03:15 PM

Right.. that got me thinking.. has anyone ever tried an alternative for these caps?

MPaulHolmes · 02-04-2011, 03:22 PM

Dang! Digikey has a bunch in!

Digi-Key - P11600-ND (Manufacturer - EET-ED2D102CA)

flores · 02-04-2011, 03:23 PM

I guess the voltage can be increased without a problem.. Is that also true for the capacity? Does it hurt to increase the capacity?

Are there any other important characteristics? except size?

Edit: posted this at the same time with the post above.

flores · 02-04-2011, 03:26 PM

Quote:

Originally Posted by MPaulHolmes

Dang! Digikey has a bunch in!

Digi-Key - P11600-ND (Manufacturer - EET-ED2D102CA)

These are slightly higher.. 5mm, is that gonna fit?

MPaulHolmes · 02-04-2011, 03:31 PM

Oh they fit. The tops of them are like 0.5mm above the baseplate, so it's perfect. I've been using those for about 8 or 10 months now. The more capacitance the better in general,and they have a higher ripple current rating too. I don't think they are necessary, but they are better.

flores · 02-04-2011, 03:35 PM

Cool.. gonna order them now.. can't wait to drive my controller. And if it works I'll order a new controller and powerboard for another controller.. and maybe a spare.. and one for a friend..

Howmany pcb's do you have left ?

MPaulHolmes · 02-04-2011, 03:45 PM

please work! hahaha.

for the control boards, I think I have 20. For the etched power board, I have negative 1, so I need to get in the garage and etch one for someone this weekend.

Make sure you check out the youtube video showing how to bolt it all together a tiny bit different from the help file. The help file still shows using heatshrink tubing, and my free version of Microsoft word ran out, so I can't edit the file until I can afford to buy it.

http://www.youtube.com/watch?v=ebikpb8Q9E0