openinverter forum

Hi guys,

I am making the conversion of old home made small tractor.
Original engine there was from JAWA 250 motocycle (10hp). Now it's MGR 4NM 40kW (Rav4).
I want to use it for simple low energy task (golf cart with trailer under 750kg). I plan to use MG1 to output 50Hz sinus for standard 3 phase async motors under 7,5kW later and MG2 for MGR to drive rear diferential. My electronics is from Yaris G9200-52031 with small board made by JLCPCB during christmass 2021. I am using 56s LiFePO4 baterry (180V, aliexpress 100Ah cells (measured 80Ah ) conected at Toyota input conector.
During last 4 weeks I had time to test it and tune it (a little):

• JLC boards didnt had 10k SMD resistors (they informed me about it, but I didn't remembered it )
• I had always OVERCURRENT error, so i pulled down the base of last transistor before cpu with 270k resistor
• I add 5V 3A step down in inverting configuration to the cap pump (measured under 1V after boot up and not -5V)
• I use ESP8266 after flash transplant (1MB vs. 8MB)
• I transplanted STM32 in MG2 after a short on pins during experimenting (seened raise a small pimple from chip)

I had more mishaps(I am learning), last one was overspin (at 180V) via sine fw with audible bang (not to loud) and stop of the MGR. After that, my heatsink temperature measurement showed 0, until reflashing fw with same 5.35R-sine binary. Temperature reading is fine, now. After that i am unsucesfull with spin of MGR via MG2 with sine and foc fw. Can you give me advice, where I can find fault? I measure 180V at IGBT capacitor terminals (first place, where Damian conected baterry in cannot kill a toyota series), but I measure 1.7V at phase terminals vs 0V of the HV during sine fw working. I don't have a scope yet...

And I want to test MG1 now with MGR and i struggle with canbus between MG1 and MG2. I was 50% sucessful in sending SELDIR value, see plot.
I was 0% sucessful with pot value, din_forvard and din_reverse. This is my MG2 configuration, MG1 is the same, but direction is Receive.
Can you help me configure canbus to corectly send, receive a use data by MG1?

So, this are my 2 biggest problems: no spin from MG2 anymore and how to spin MG1(no physical pins).

Thanks.

viewtopic.php?p=83442#p83442

these are my mappings that I am sending to the screen and they work. hope it helps.