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Old 02-17-2012, 09:03 AM   #671 (permalink)
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I haven't tested the new DC driver because of money. There were unexpected expenses in Kenya with our daughter at her new high school. The drivers are identical except that the AC driver goes from -8v up to 15v, and requires a 24v supply. Even though the new controller was going to be for Ben, a guy sent me some money, basically bribing me to let him try it! haha. I figured that it's better to get it tested than not, so I ordered the rest of the parts and will be building it in the next week or 2. After trying this approach, which should work fine, I'm going to switch to a high side drive and try that out.

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Old 02-17-2012, 09:55 AM   #672 (permalink)
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I've been lurking in this thread for a few days, reading the 678 posts. It's looking good Paul. Hope you and the others can get a working model finalized. I like the idea of being able to regen on braking.
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Old 02-20-2012, 12:56 PM   #673 (permalink)
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The software for ACIM is SOOOOOOOOO close to being done, and is done in the case of a permanent magnet synchronous motor. Just another day or so. And everything is correct this time. Mathematically right. Nothing is based on taking other code and adapting it. It's all based on deriving each formula from scratch myself and coding that. It makes sense and will work.

I thought I was heading off on a slower way of doing the space vector modulation than the Microchip code, but it turned out to be probably half the steps of theirs, but slightly longer. It just kept simplifying.
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Old 02-27-2012, 09:09 AM   #674 (permalink)
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Great ! Congratulation, because it's really not an easy job !

Nothing to do with this topic, but is there a place on this forum to talk about a generic BMS I designed and I want start to sell in some weeks ? Based on a single small board on each element, 1 wire bus between element, automatic addressing, voltage and temperature measurement ( precision <0.5% on voltage), very easy wiring with screw terminals, very low size (24x20mm), low price, and most likely open protocol to read element data and integrate the BMS easily on any system with an available RS232 port (good for DIY guy !!).

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Old 02-27-2012, 10:46 AM   #675 (permalink)
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I think you would just start a new thread called "Cyril's totally awesome new BMS" or something like that.
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Old 02-27-2012, 10:55 AM   #676 (permalink)
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Okay, but it will be commercial, it can be rejected by moderator ?
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Old 02-27-2012, 11:32 AM   #677 (permalink)
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Okay, but it will be commercial, it can be rejected by moderator ?
The fact that you even ask shows that you are a caring human being and not an evil spambot!

I'm a moderator and I wouldn't reject it. If it is about how the system works, and you are taking people's input, and it's a real discussion about technology, we would all love to hear about it.

If you have a finished product that you just want to sell, make an "Ad" for it in the "FOR SALE" forum.
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Old 02-27-2012, 11:49 AM   #678 (permalink)
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Okay thank you, so I will post a topic about my BMS, I think it can be interesting for a lot of DIY guys, and I work on it to have the price as low as possible, but with high precision and reliability. As I said, I think I will give the protocol to directly communicate with the element's BMS bus, with a simple RS232 interface (will give the schematic too), to add monitoring everywhere there is a free RS232 port.

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Old 02-27-2012, 04:24 PM   #679 (permalink)
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My topic is done, it took me almost 2 hours to write it, to try to have the better english as possible. It will take 4 hours for you to read and understood it

http://ecomodder.com/forum/showthrea...bms-20723.html
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Old 02-27-2012, 06:22 PM   #680 (permalink)
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I think you would just start a new thread called "Cyril's totally awesome new BMS" or something like that.
I agree!!

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