First cut of a breakout board with mini mainboard for first tests

Good luck! Various proprietary solutions exist, would be nice to have an open source one

No, this is just needed for actual resolvers as they output like +/-1V. Your chip likely outputs between 1-3V or something, so unipolar already

Great to read :) That's very strange as I'm running the inverter (on a Zoe motor) without the mod. I even faintly remember that the pin drew excessive current when feeding it 12V. Another user reported the mounting holes to be off and they fit my inverter perfectly. I wonder if there's different rev...

Just tried opening the project and there seem to be some missing files: Fehler traten beim Laden der Footprints auf: Footprintbibliothek "/home/johu/Projekte/e-umbau/kicad/Nissan-Leaf-Gen-3-Adapter-Board/V0.0.4/Footprints" nicht gefunden. Footprintbibliothek "${KICAD_LIB}/JLCPCB/JLCPC...

Now continuing with some more gate driver research. The isolators are ISO7421 from TI. https://www.ti.com/product/de-de/ISO7421 They have one forward one reverse channel. Traced the 6 forward channels that gives me the 6 gate drive signals and the 6 reverse channels give me the 6 desat signals. The ...

Success stories make us happy

Thanks very much for writing this up - again.

If anyone feels harassed let one of the admins know. We can flag a warning and ultimately ban people who suck energy off the creative crowd.

To whoever thought it was a good idea to be rude: Chop wood if you have a bad day.

Just drew this up for a customer so thought I might as well post it here. Pain: you have no VCU and no CAN communication with the inverter but want to limit throttle for whichever reason. Solution: limit max throttle output voltage with a shunt reference (or Zener, but they are less predictable I th...

Sound like a cause for failure? No, 5V pins are on many other connectors. Can you please attach pictures directly to your post (attachment in Full Editor). When I click these imgur ones I only see a blank page plus they tend to vanish. This explosion looks a bit like you fed 12V into one of the ULN...

Great! Let us know how it went

serh270 wrote: ↑Tue Apr 09, 2024 5:02 pmISSUE #1

Gain=0 and x*0 is 0 Make Gain=1 and you'll get your data

In the diagram it looks like you're feeding 5V to Foccci? This is not necessary
The CCR might be redundant as the driver chips are quite strong, lets say 5A total contactor current (limited by reverse protection diode)

How would that be possible? On your photo it looks correct plus I doubt you can mangle a 16-pin header into 14 holes

You're indexes are off by one and you're decoding big endian. Try this

J0hannes wrote: ↑Mon Apr 08, 2024 8:32 pm Is my train of thought correct if I mute the LBC simulating CAN messages Zombie sends to CAN if I have the actua LBC in same CAN as PDM and Inverter?

sounds correct to me

Well if the Wifi adapter has a CAN connection to Foccci but Orion does not then check the CAN Link between the two and connect your CAN dongle to various junctions to see where data is lost. I'm assuming the CAN link must work though if the ESP32 board communicates? Exactly, I think a new board is u...

uhi22 wrote: ↑Mon Apr 08, 2024 12:47 pm Isn't counting watthours after a full charge the only necessary thing? Is it necessary to use the voltage for SOC estimation?

Yes, amp hours in fact. But then you need to know what the actual capacity is plus you drift away over time because of measurement tolerance

The OI 16-channel BMS is supposed the be accurate enough to estimate LFP SoC. But it needs a 2 hour resting period because the dielectric effects take super long to taper off.
As always hacking the OEM BMS would be the premier approach

It's got this now, but of course that requires flashing the latest Web UI. That will take a while to trickle through

If the QCA reports "Bootloader" as software version, it was not able to load its firmware from the SPI flash Coincidentally I just had that exact symptom. Turns out the QCA had some bad solder joints. Quite intuitively on the side pointing towards the flash. Also the SPI flash itself had ...

Oh!

LeafTaco wrote: ↑Sun Apr 07, 2024 3:39 pm For replacements if the base board looks all right can i just replace with a main board?

Yes, leave a note and I'll flash the Leaf params on it

Just to confirm: you flashed stm32_loader.hex and stm32_sine.hex (or foc) and you get a 5 Hz blinky LED (provided the through hole board has got one?)

Hmm it's reverse polarity protected. What do you think melted?

Do I have to activate can on the brainboard or something like that? You need firmware at least 5.27.R and canspeed 500 . All else doesn't matter. You should also update the ESP32 firmware itself, it has some reliability improvements https://github.com/jsphuebner/esp32-web-interface/tree/can-backend...

Mine turns off at 400V and turns back on at 393V. So short acceleration bursts are sufficient to start it back up but likely short regen bursts turn it off again.