openinverter forum

Hi! My clumsiness might have damaged my opensource board or maybe the inverter.

I hooked up the motor (with the openinverter board) to one battery module (86volts)
and got it running in manual mode. Then I connected the model 3 contactors so I got precharge. I also connected a throttle pedal (prius). I actually got the contactors to work fine by setting UDCMIN to 0 and UDCSW to 10 volts under the battery voltage. But when I pressed the throttle the motor went very slowly and where jerking a lot. It also ran in reverse when I connected the 12 volt to the forward pin and vice versa. Now I thought that I should try a higher battery voltage and that it might be the problem of the motor being jerky.

Now to the sad part... I accidentally made a short when I tried to switch pins for reverse and forward. I don't know exactly what happen'd but it started smelling burnt from the motor controller so I disconnected it and took it apart but couldn't find any burnt circuits and the smell only came from the pins. I reassembled it and connected 12v and ground and the Wifi interface plopped up so it had power at least. But when I tried to test it with some low voltage in manual mode nothing happens.

I'm going to take it apart once more and try if I can find something else. But my question is whether the inverter could get damaged by shorting the 12v? Because the controller board seems to work fine. Parameters below.

Thanks!
/Johannes

The slow jerking motion of the motor sounds as if the encoder wires need to be swapped over.

And it also looks like you hit the "Restore Defaults" button at some point. Please upload the SDU parameters again: https://openinverter.org/wiki/Configura ... _SDU_Marco

I have removed the "Restore Defaults" button from the web interface a while ago as it only causes damage.

johu wrote: ↑Mon Oct 26, 2020 4:54 pm And it also looks like you hit the "Restore Defaults" button at some point. Please upload the SDU parameters again: https://openinverter.org/wiki/Configura ... _SDU_Marco

I have removed the "Restore Defaults" button from the web interface a while ago as it only causes damage.

Yep I noticed it had some weird behavior. Will upload the original parameters tomorrow. Thanks!

Boxster EV wrote: ↑Mon Oct 26, 2020 2:59 pm The slow jerking motion of the motor sounds as if the encoder wires need to be swapped over.

I read that in the support thread but are those the wires from the controller to the inverter? I'm a beginner in this area so I might not understand all the terms.. Thanks anyway!
/Johannes

johu wrote: ↑Mon Oct 26, 2020 4:54 pm And it also looks like you hit the "Restore Defaults" button at some point. Please upload the SDU parameters again: https://openinverter.org/wiki/Configura ... _SDU_Marco

I have removed the "Restore Defaults" button from the web interface a while ago as it only causes damage.

Tried those parameters with no luck. I also noticed that they where different from the ones on Github: https://github.com/damienmaguire/Tesla- ... s_SDU.json

I took it apart again and found that the ground pin has been burnt but I couldn't fin anything else.

I tried again with the new firmware and parameters and hooked it up with contactors and pre charge. When I supplied it with voltage it closed the pre charge and when I pressed the ignition button the pre charge opened and the main closed but opened right after. And after that the controller was dead... Not a single life sign...

Seems like my mistake will make me buy another controller.
Is there a way though to see if the inverter works as it should? If I could have damaged it?

I suspect you somehow damaged the connection to the ground plane. Then closing the contactors, which also draws power via that GND connection finished off the remaining copper. Try adding a jumper link from the GND pin to another GND on board, e.g. the source pin of one of the MOSFETs.