openinverter forum

Posted: **Thu Oct 26, 2023 10:36 pm**

I would like to know if this is possible with FOC firmware.
Initially there is something that I don't see how to solve, because in the motor resolver connector there are 6 cables (R1, R2, S1, S2, S3, S4) and on O.I. mainboard v3, I only see 4 entries in JP2:
pin1=S3
pin2=S1/S4 (two wires from motor?)
pin3=S2
pin4=R1
Where would R2 go?

Besides this, does anyone see any other problems?

Posted: **Thu Oct 26, 2023 10:50 pm**

Schematic suggest R2 goes to GND.
https://openinverter.org/wiki/File:Main_board_v3_.jpg

Posted: **Fri Oct 27, 2023 10:34 am**

royhen99 wrote: ↑Thu Oct 26, 2023 10:50 pm Schematic suggest R2 goes to GND.
https://openinverter.org/wiki/File:Main_board_v3_.jpg

Yes R1 is the excitation signal into resolver core. R2 is just the other side. But it has to go to GND on the side of OI board!

Posted: **Sat Nov 18, 2023 2:45 pm**

chentron wrote: ↑Thu Oct 26, 2023 10:36 pm I would like to know if this is possible with FOC firmware.
Initially there is something that I don't see how to solve, because in the motor resolver connector there are 6 cables (R1, R2, S1, S2, S3, S4) and on O.I. mainboard v3, I only see 4 entries in JP2:
pin1=S3
pin2=S1/S4 (two wires from motor?)
pin3=S2
pin4=R1
Where would R2 go?

Besides this, does anyone see any other problems?

did you manage to find all the pin values on the standard board of the rear inverter in order to connect the OI board to it?

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