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Old 07-07-2014, 03:36 PM   #6621 (permalink)
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Took the board out of the enclosure


Desoldered caps:


And new ones on:

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Old 07-07-2014, 03:37 PM   #6622 (permalink)
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Paul, can you share the firmware somewhere so I can program it?
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Old 07-07-2014, 03:58 PM   #6623 (permalink)
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somebody hold this guy back. he's out of control! He will not be denied...

The hardware overcurrent trip isn't being reset automatically, so if it trips, you will have to cycle power at the moment with the version of software I sent over. It's just to prevent catastrophe while the bugs are worked out. Also, don't forget that full clockwise of the little POT on the board means hardware overcurrent trip is 1800amp. Full counterclockwise means hardware overcurrent trip is 0amp. I think full clockwise would be OK, because the 3 IGBTs are rated for 600amp continuous each anyway (assuming a magical infinite heatsink, and running at 125 degC or some such silliness). The default maximum motor amps at full throttle that I sent to you was 100. haha. That's just for testing it out.
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Old 07-07-2014, 04:05 PM   #6624 (permalink)
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Do higher rated igbt's exist? Or will only the voltage be higher then?
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Old 07-07-2014, 04:15 PM   #6625 (permalink)
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The capacitor could be run at like 500v. You would probably need 2 of them if you wanted 2000amp for any extended period of time.

They have 800amp, 900amp, 1000amp, and 1400amp 1200v IGBTs. Here's one:
Powerex Product: CM800DY-24S

It might be a little too fat to fit 3 of them side by side. They don't seem to have higher current 600v IGBTs for some reason.

EDIT: Yep, it would require like 5.2 inch per IGBT.
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Old 07-07-2014, 04:27 PM   #6626 (permalink)
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wow.. 500$
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Old 07-07-2014, 04:29 PM   #6627 (permalink)
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So. hooked op the pickit


MPLab programming


And now the light stay on.. guess thats a good thing, because before it was off
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Old 07-07-2014, 05:01 PM   #6628 (permalink)
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Ya, I just have the light turn on and not do anything really at the moment. The IGBTs you have are over $300 each I think. I got them new and cheap on Ebay, but those days are gone.
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Old 07-07-2014, 05:04 PM   #6629 (permalink)
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Its dead jim..

Hooked up my serial and terminal program.. but don't get a response on the config command..

To be sure I took off your rs232 cable and loopbacked it.. that works.. so the cable is good..

What can I check?
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Old 07-07-2014, 05:04 PM   #6630 (permalink)
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19200 baud, got that from the source

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