Paul & Sabrina's cheap DIY 144v motor controller

[MPaulHolmes]

http://www.sbelectronics.com/wp-cont...D601-print.pdf

I wrote to them, asking where I can buy it. I'm hoping for relatively short periods of 1500amps, like beating people off the line on the way to the grocery store. 1500amp would have around 3-4kW of waste heat, and as I'm not making it water cooled, you might not want to do that all day. Or make a big cold plate.

[jedsmd]

Originally Posted by MPaulHolmes

http://www.sbelectronics.com/wp-cont...D601-print.pdf

Thanks I have been trying to read up on ring caps on the SBE site. Sounds like they have some real advantages over the aluminum caps. The longer life particularly appeals to me. That is one of the features I want in a controller.

I wrote to them, asking where I can buy it.

I couldn't find that one on a web search but a similar one is about $200 - so not too scarey

700D10896-348 | 700D Series 600V 1000 uF ±10% Metallized Polypropylene Power Ring Film Capacitor | SBE INC - Future Electronics

I'm hoping for relatively short periods of 1500amps, like beating people off the line on the way to the grocery store. 1500amp would have around 3-4kW of waste heat, and as I'm not making it water cooled, you might not want to do that all day. Or make a big cold plate.

I have found it takes about 800 amps to take my truck nicely off the line. 1500 amps will be plenty robust

[MPaulHolmes]

They just wrote back to me, saying I can order the 3 SBE 450v 1600uF capacitors directly from them. Could we try $500 each per person at the moment, and then I'll either ask for a little more, or return the unused amounts after ordering things? I'll keep careful receipts. I think it will save on shipping for everything to come to one place. There are several items that are all from different places. Copper sheet from one place, nomex sheet from another, standoffs from McMaster Carr, aluminum plate from another, electronics from Mouser/Digikey etc...

[jedsmd]

The $500 is okay but I am curious why it cost so much more than this one:

700D10896-348 | 700D Series 600V 1000 uF ±10% Metallized Polypropylene Power Ring Film Capacitor | SBE INC - Future Electronics

These are from the same manufacturer, same series and in the same physical package for $200.

Maybe we should ask Future Electronics if they can supply the 1600 uf cap. They might get a better price from SBE because they are a international corp. rather than an individual.

I would like to send an RFQ to Future Electronics and see what they say.

[MPaulHolmes]

LOL, NOT for the capacitor. $500 more from you guys For the whole controller. I still don't know what they are going to ask for it, but it's the same dimensions as the 600v 1000uF capacitor.

[jedsmd]

Originally Posted by MPaulHolmes

LOL, NOT for the capacitor. For the whole controller. I still don't know what they are going to ask for it, but it's the same dimensions as the 600v 1000uF capacitor.

My bad I guess I could have read your whole post before flying off the handle

How do you want the $500 sent?

Also I am going to need your mailing address so I can forward the igbts.
Jerald

[MPaulHolmes]

Our address is
Paul Holmes
54825 W Hart Place
Maricopa, AZ 85139

You could paypal the money to billing@paulandsabrinasevstuff.com. That should leave at least a solid $400 after fees. haha.

[jedsmd]

Originally Posted by MPaulHolmes

Our address is
Paul Holmes
54825 W Hart Place
Maricopa, AZ 85139

You could paypal the money to billing@paulandsabrinasevstuff.com. That should leave at least a solid $400 after fees. haha.

If you like I can throw a check in with the igbts - than you won't have to pay paypal.

[MPaulHolmes]

Hey, that's using your noodle. I forgot that you were going to ship them to me anyway. That would work.

[jedsmd]

Originally Posted by MPaulHolmes

... I was wanting to assemble at least 1 of them. I don't mind doing all 3, but if anyone wants to try it themselves, they sure could. I will need to do some testing on a completed one to look at waveforms and timing, etc...

Paul
Much as it would be fun to do my own, I think I shall take you up on the offer to assemble. That way I get top quality craftsmanship and the finish product gets scoped.
Jerald