03-07-2012, 03:00 PM
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#681 (permalink)
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PaulH
Join Date: Feb 2008
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The power board, low side driver board, and high side driver board are done being routed and are ready to go in. The control board schematic is finished, and the components are being placed. It has lots of safety built in. It's truly a miracle if the 6 pwms actually get through. haha. You power the control board with anything more than around 8v, and then there are 6 isolated homemade (super cheap) DC-DC converters that change the 8v to 18v input to 24v. Then the 24v is divided up to drive -8v to 15v or something like that. If micro is unresponsive for more than 1 ms, adjustable undervoltage trip (too negative), adjustable overcurrent trip (too positive), +12v too low, +25v too low, +5v too low, then the fault pin is set in the dsPIC which disables all pwms, and also the hardware shuts off the power to all the optocouplers independent of the dsPIC.
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03-07-2012, 05:23 PM
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#682 (permalink)
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OMG... It's SkeeterB!!!
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Wow! It looks like you really have a bunch of different safety features on there. How would you reset it if the controller shut down because of an over or undervolt situation?
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03-07-2012, 07:02 PM
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#683 (permalink)
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PaulH
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Oh, it just tells the microcontroller about it, and then the micro can clear the overcurrent if it feels like it, but the undercurrent won't be cleared until it's no longer an undercurrent state. When that happens, the drivers are automatically re-enabled.
EDIT:
But the UNDERVOLTAGE won't be cleared until it's no longer an UNDERVOLTAGE state. dang it. haha.
Last edited by MPaulHolmes; 03-08-2012 at 08:37 AM..
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03-07-2012, 07:30 PM
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#684 (permalink)
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EcoModding Lurker
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Paul, how close are you to having a functional system that we can purchase?
RJ
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03-24-2012, 02:38 PM
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#685 (permalink)
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EcoModding Lurker
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So I was wondering, can you turn a cheap generator into an AC motor? I mean, not just make turn but, make it efficient and powerful to run a car.
I found this 10Kw AC generator and it seems to me that maybe it could work. Let me know what you think. Thanks.
Look for this and it will come up on the net:
10,000 Watts Max/7200 Watts Rated Belt-Driven Generator Head
P.S. I have the link but it doesn't allow me to post it yet, so I'm going to try a different system by leaving spaces on the alert triggers.
www harborfreight com /10000-watts-max-7200-watts-rated-belt-driven-generator-head-45416.html]Generator Head - 10,000 Watts Max, Belt Driven[/url]
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03-29-2012, 01:17 AM
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#686 (permalink)
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EcoModding Lurker
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I just read this... I like those words "Less than $100." I'm ready, willing and able to pay the regular fee!
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04-06-2012, 06:01 AM
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#687 (permalink)
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EcoModding Lurker
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Is something went wrong?
Hi, Paul.
Long time no news. Is everything O.K.?
How are the things going?
Quote:
Originally Posted by MPaulHolmes
The power board, low side driver board, and high side driver board are done being routed and are ready to go in. The control board schematic is finished, and the components are being placed. It has lots of safety built in. It's truly a miracle if the 6 pwms actually get through. haha. You power the control board with anything more than around 8v, and then there are 6 isolated homemade (super cheap) DC-DC converters that change the 8v to 18v input to 24v. Then the 24v is divided up to drive -8v to 15v or something like that. If micro is unresponsive for more than 1 ms, adjustable undervoltage trip (too negative), adjustable overcurrent trip (too positive), +12v too low, +25v too low, +5v too low, then the fault pin is set in the dsPIC which disables all pwms, and also the hardware shuts off the power to all the optocouplers independent of the dsPIC.
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Last edited by TadhBijou; 04-06-2012 at 06:15 AM..
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04-06-2012, 08:42 AM
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#688 (permalink)
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PaulH
Join Date: Feb 2008
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The boards will be here around the 16th of this month. Hurray!
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04-06-2012, 08:27 PM
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#689 (permalink)
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EcoModding Lurker
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04-09-2012, 04:27 PM
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#690 (permalink)
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EcoModding Lurker
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Liquid Cooling?
Paul,
How hard would it be for me to build one of these with liquid cooling? Or is it already? Aren't there comercially available liquid heat sinks that could be swapped in?
Thanks, and keep up the good work!
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