09-27-2010, 09:21 AM
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#3811 (permalink)
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Master EcoModder
Join Date: Apr 2009
Location: Charlton MA, USA
Posts: 463
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Quote:
Originally Posted by The Toecutter
They should be! The idea behind the open source controller is its affordability, right? Of course, reliability is also a factor... that being said, there probably are cheaper substitutes that will last the life of the controller, however long that may be(at least 2,000 miles so far in some examples).
When I build it, the control board will definitely see what happens when it is abused in a racing environment with 500A at the power board for ~3 minutes straight(that's all the PbA battery will last!). You'll get another data point there. Later on will be an upgrade to 160AH LiFePO4, to test it further...
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I wouldnt say open source is just to be afordable. It is a big factor, but this controller is also just as advanced as the big guys. The rest of the controller are built with some of the best parts avaiable, International Rectifier MOSFETS, Panasonic Caps, and the LEM HASS-300 current sensor.
Another solution would be to use a current shunt. The cost of the shunt is very cheep some times as cheep as $10. BUT, you will need a high accuracry AD converter to read the shunt as well as isolation circuitry, including another small. At this point you will have more into the cost of this circuitry then the LEM.
-Adam
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09-27-2010, 10:31 AM
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#3812 (permalink)
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Custom EV Builder...
Join Date: Jul 2009
Location: Ohio
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Quote:
Originally Posted by MPaulHolmes
OK, I've tested all the main circuits for the SR controller now, since there are 2 of them for SR, and 6 for AC, and the AC version works (so the SR version will work). The only thing for the SR version to really test is multiple gate drivers. I think it will be fine.
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EXCELLENT! I'm waiting for that control board with multiple gate drivers.  |
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09-29-2010, 11:09 AM
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#3813 (permalink)
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EcoModding Lurker
Join Date: Sep 2010
Location: usa
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Where can I find an insulating strip for the transistors? I ordered a package to-3p mica insulators but I was thinking of using a single insulating strip instead.
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09-29-2010, 02:05 PM
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#3814 (permalink)
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PaulH
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
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I just added it to the wiki. Unfortunately, they sell them in sheets of 8" x 16", and you probably don't need that much. Here's the part number that I use, and seems to work well:
Digi-Key - BER231-ND (Manufacturer - GP1500R-0.010-02-0816) |
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The Following User Says Thank You to MPaulHolmes For This Useful Post:
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10-13-2010, 12:51 AM
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#3815 (permalink)
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EVer
Join Date: Aug 2009
Location: Calgary
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woo hoo
Got my version c working today. What A THRILL TO FINALLY GET THE CAR TO MOVE AFTER ALL THAT WORK. Many thanks to all who contributed.
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10-13-2010, 08:01 PM
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#3816 (permalink)
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PaulH
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
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Hurray! It didn't blow up. Thank you for not telling me ahead of time, exrdega that you were testing it. That gets sort of stressful.
Louman: PM'd you about microcontroller
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10-13-2010, 08:24 PM
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#3817 (permalink)
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Computer/EV enthusiast
Join Date: Jan 2010
Location: Indiana, USA
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I just had to post and tell you Paul...
An ad popped up under one of your posts. Rather than annoying me like most ads do, I couldn't help but laugh. It was advertising for "the trampoline outlet"  |
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The Following User Says Thank You to Grimm For This Useful Post:
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10-13-2010, 08:44 PM
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#3818 (permalink)
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PaulH
Join Date: Feb 2008
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hahaha. I should do a signature about diarrhea. It would be interesting to see if they would advertise about some anti-pepto-bismal or something. "I still have diarrhea even after dose after dose of the pink stuff."
OK, I need to do that friggen SR control board. Here's the question I have... Can one optocoupler output drive, say, 2 drivers each? I think it can. And d  o I have to have each driver have its own isolated supply? Thats more expensive, and is possibly unnecessary |
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10-13-2010, 08:54 PM
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#3819 (permalink)
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AC-DC enthusiast
Join Date: Nov 2009
Location: Long Island, NY
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Quote:
Originally Posted by MPaulHolmes
OK, I need to do that friggen SR control board. Here's the question I have... Can one optocoupler output drive, say, 2 drivers each? I think it can. And d o I have to have each driver have its own isolated supply? Thats more expensive, and is possibly unnecessary |
More likely that one optocoupler will drive 2 drivers, but, will the signal be in withing spec's?
About the power supply, a shared supply will suffice for boths drivers taking in consideration that this drivers will NOT drive different segments of the circuit.
I still have the dreams of having the completed SR controller in my hands and in working conditions powering my bench trany/motor assembly.
__________________
. .. .. . .... ...
Prius Absolutum Dominium . ..........KOPPER
PHEV conversion since Dec 2006.. . .... .Future EV
. . . . . . . .CALCars # 27. . . . . . . . . . ..on the works now !!
. . . . . . . . . . . . . . . . .. . ........
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10-13-2010, 08:58 PM
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#3820 (permalink)
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EcoModding Apprentice
Join Date: Feb 2010
Location: Northern Wisconsin
Posts: 137
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Quote:
Originally Posted by MPaulHolmes
"I still have diarrhea even after dose after dose of the pink stuff."
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If that's true -  Look up Celiac Disease - English, Irish, Scottish,(Celtic people) have the gene for it and it can switch on with trauma.. LOL Once on, you are allergic to Gluten -- oh yah!
Of course there is much more to it -- then again maybe you were funning 
__________________
Dave ...
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