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Old 10-22-2011, 12:04 PM   #361 (permalink)
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Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
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It's beautiful.

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Old 10-29-2011, 08:34 AM   #362 (permalink)
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Its alive!!! Alive I say! Had two small problems. Seems my secondhand 3 phase bridge rectifer had a shorted diode. Fortunatly , I powered up with a light bulb in series with the mains supply (old habits die hard!) so no damage was done. Moral of that story : don't use cheap second hand parts. Next the display told me my mains bus was at -900vdc. I missed out two pins on the arduino and pcb. Once they were fitted it ran up no problem with 300w of light bulb load. Now running a 240v 2500w electric oven element as per the photos. I'll have some video and more photos later if it doesn't explode
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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.
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Old 10-29-2011, 02:04 PM   #363 (permalink)
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You are unstoppable. Don't you ever have to debug anything for more than 3 seconds?! Do you have any idea what the power factor is going to be?
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Old 10-29-2011, 05:06 PM   #364 (permalink)
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Paul , i guess i'm just lucky! most thing never work first time for me Power factor won't be great on this version but i'm working on a boost pfc frontend that will bring it up near unity. I'm also considering running it on 3 phase where pf is not so much of a concern.

I took it up to about 3kw later on today then had a mishap! The battery sensing resistor got hot enough to burn through the insulation of the ground sense wire. Bang. And yes i got it on tape Took out the igbt , driver chip and dc dc converter. Vaporised the sense resistor. Got the bits swapped out and its now up and running again.

Here is some video from earlier tests :


I have to say I'm very impressed so far. No temp rise at all , very stable. I would like to identify the weird noise I observed on the scope in the video. Any ideas?
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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.
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Old 10-29-2011, 07:08 PM   #365 (permalink)
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The big bang
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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.
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Old 10-30-2011, 12:33 AM   #366 (permalink)
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That was awesome. There's something really fun about feeling like you almost died. Maybe fun's not the right word.
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Old 10-31-2011, 06:18 AM   #367 (permalink)
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Seems my mistake was not mouting the sense resistor to the heatsink! doh
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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.
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Old 11-07-2011, 05:11 PM   #368 (permalink)
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Quick update. Finally received a box of 2500w electric oven elements. Wired up two and powered up. The charger kinda looked at em and said "Whats this? an led?"

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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.
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Old 11-07-2011, 06:22 PM   #369 (permalink)
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I can not even imagine the speed of your electric meter with those magawatters on testing.......
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Old 11-12-2011, 05:00 PM   #370 (permalink)
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Charging the bmw traction battery :

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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.
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