07-01-2011, 03:17 PM
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#4901 (permalink)
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Master EcoModder
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thanks Paul!. I got the 1ka control board running today. Had to fool the traction voltage sensing and hardware undervoltage circuits as i'm just bench testing. I mounted the melexis current sensor on a piece of 20mm x 10mm copper bar as per the photo and shorted out a fully charged 7ah gel battery. It managed an impressive 162amps according to rtd.
I'm tentatively looking at 4 of these for the power stage:
IGBT Modul FUJI 1MBI800U4B-120 | eBay UK
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Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
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07-01-2011, 03:34 PM
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#4902 (permalink)
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PaulH
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Hi jack! That's awesome! Just so you know, the hcpl-4506 optocoupler is basically worthless for your application. Make sure you go straight from before the opto to the igbt driver board. There's a big hole for that.
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07-01-2011, 04:05 PM
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#4903 (permalink)
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Master EcoModder
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Yeh i saw that , thanks. What's the story with the traction voltage sensing? I saw a max_voltage parameter on rtd. Can i set the point at which the contactor closes etc? Will it shutdown on low voltage?
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Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
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07-01-2011, 11:29 PM
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#4904 (permalink)
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PaulH
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The max_voltage parameter was some half baked idea about not closing the main contactor if the precharge voltage got too high. But it could be used for all sorts of things. The precharge circuit doesn't need to know the max voltage to work though. It's based on change in voltage over time. What it does is, if there has been ZERO change in voltage in the last second, and the voltage is sufficiently greater than zero, then the caps are full, so close main contactor.
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07-04-2011, 02:44 PM
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#4905 (permalink)
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Master EcoModder
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Hello everyone. My name is Damien and i'm a controlerholic 
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Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
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The Following 5 Users Say Thank You to jackbauer For This Useful Post:
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07-04-2011, 03:47 PM
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#4906 (permalink)
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PaulH
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haha. I'm on step 1 of the 12 step program.
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07-04-2011, 04:51 PM
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#4907 (permalink)
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EcoModding Lurker
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Hi Damien!
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07-04-2011, 05:04 PM
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#4908 (permalink)
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PaulH
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hahahaha
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07-05-2011, 04:08 AM
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#4909 (permalink)
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EcoModding Lurker
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Tazzy - '02 Toyota Tazz Sport 90 day: 43 mpg (US)
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Beautiful!
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07-06-2011, 04:20 PM
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#4910 (permalink)
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Master EcoModder
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Looks like the VLA is driving my gate off too fast. Common problem at my age i'm told
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Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
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