johu wrote: ↑Fri Sep 06, 2019 6:11 pm
Damn it.. I mean thanks for checking
Even if it were PWM your multimeter would convert it to a voltage. So now I can either skip DC voltage which would disable meaningful precharge control or wire the remaining pins to a jumper link.
FOC doesnt need DC link voltage does it?
You could just make precharge function of time . But there would have to be clear instruction to use such and such resistor!
johu wrote: ↑Fri Sep 06, 2019 6:11 pm
Damn it.. I mean thanks for checking
Even if it were PWM your multimeter would convert it to a voltage. So now I can either skip DC voltage which would disable meaningful precharge control or wire the remaining pins to a jumper link.
Over CAN-bus do we get the DC-voltage reading so some how is the logic board measuring it.
See my attachments.
This is the PCB that residents the IGBT:s, it looks like an array of resistors in the middle that goes somewhere on the board. I have measured it and there is contact with the incoming positive DC-voltage on that resistor array.
That looks very similar to the gen2 driver board. Looks like the other end of those resistors bugger off to the logic section on an inner layer.
I'm sure it must show up somewhere.
Why does the connector have a different pin count to the one on the controller?
johu wrote: ↑Fri Sep 06, 2019 10:13 pm
That looks very similar to the gen2 driver board. Looks like the other end of those resistors bugger off to the logic section on an inner layer.
I'm sure it must show up somewhere.
Why does the connector have a different pin count to the one on the controller?
I attached an overview of the connectors/colours of the bottom PCB.
Attachments
Best picture I have of the connectors on the logic board. Yellow is second from right.
So Gerber files attached, does anyone with a Gen1 Leaf want to get some boards made?
Hi Johannes,
My first post on this forum. Totally a newbie and a mechanical engineer not electrical! I have a Gen1 that I am building a E-Truck out of. I am willing to pay the cost toward making some of these boards. I can use one. Let me know how to proceed. We typically use pcbway.com. They offer great quality and quick turn around.
Ok, so all the components from the BOM above have arrived and been put on (except for R1, was confused as to if that is a 120 Ohm resistor or not?) I'm guessing I'll need the Revision 3 brainboard on the webshop, just like with the Gen 2 inverter board? Please let me know if you can't see the image.
skyguy6153 wrote: ↑Mon Nov 18, 2019 10:48 pmPlease let me know if you can't see the image.
Please post images as attachments because we've all experienced third part hosting sites changing their policies and making threads unreadable.
This is a personal post and I disclaim all responsibility for any loss or damage which any person may suffer from reliance on the information and material in this post or any opinion, conclusion or recommendation in the information and material.
I wish I found this thread earlier, I was unable to find the white connector anywhere after damaging the first one and had to buy a replacement inverter just for the connector. Good news is the inverter is only $200, Now I have 2 inverters for whatever reason and know where to get a hold of the connector:).
Anywho, Just bought the v3 Brainboard, Had my Gen 1 Leaf adapter made and ordered parts from the BOM. I'll test and report back when I get a hold of all parts. For now I'll keep reading through the Docs.
Is the process for the Gen1 and brainboard similar to the Gen2? Just attach the brainboard to the adapter, connect wires to the white connector? What pins power the motor?
Update: Got the motor spinning! We had to remove the DESAT pin (and connect the forward pin to 12V...). Looks like the alert signal on this Leaf inverter is active high instead of active low. Does anyone know if this polarity is easily changed in the brainboard firmware? If not, it might be easier to invert the signal with hardware.
The inverter enclosure can't close with brain board being a daughter board on top of the adapter board, so I will have to design a new board to combine the brain board and adapter board (and integrate the brain board test circuit too).
That is very useful feedback. Too bad the universal brain board approach doesn't work here. How much extra room would there need to be? Would it work upside down?
The DESAT pin feeds into a NAND tree, i.e. it must be high in order for PWM to run. Inversion needed... Maybe an NPN transistor for now
lpitka wrote: ↑Fri Feb 28, 2020 3:36 pm
Update: Got the motor spinning! We had to remove the DESAT pin (and connect the forward pin to 12V...). Looks like the alert signal on this Leaf inverter is active high instead of active low. Does anyone know if this polarity is easily changed in the brainboard firmware? If not, it might be easier to invert the signal with hardware.
The inverter enclosure can't close with brain board being a daughter board on top of the adapter board, so I will have to design a new board to combine the brain board and adapter board (and integrate the brain board test circuit too).
Thanks for reporting back. What pin is the DESAT pin? Is it on the v3 board or the adapter board?
johu wrote: ↑Fri Feb 28, 2020 4:47 pm
That is very useful feedback. Too bad the universal brain board approach doesn't work here. How much extra room would there need to be? Would it work upside down?
The DESAT pin feeds into a NAND tree, i.e. it must be high in order for PWM to run. Inversion needed... Maybe an NPN transistor for now
It might work with the brain board on the bottom side of the adapter board. I will take a look when I'm back in the shop on the weekend.
Another option would be to rearrange the adapter board so the brain board can sit right on top of the adapter board and be soldered to it instead of having to use female headers. Currently female headers are needed because the brain board would otherwise collide with CN4 and CN5, and the WiFi module would collide with CN1. If the brain board could be moved up a few mm on the adapter board then it would no longer collide with CN4 and CN5, and CN1 could be moved to the other side of the WiFi module. In this case, the brain board would be able to sit low enough on the adapter board to fit in the inverter enclosure.
I will add a transistor to invert the DESAT signal on the next board I order. Simple fix to the problem.
lpitka wrote: ↑Fri Feb 28, 2020 3:36 pm
Update: Got the motor spinning! We had to remove the DESAT pin (and connect the forward pin to 12V...). Looks like the alert signal on this Leaf inverter is active high instead of active low. Does anyone know if this polarity is easily changed in the brainboard firmware? If not, it might be easier to invert the signal with hardware.
The inverter enclosure can't close with brain board being a daughter board on top of the adapter board, so I will have to design a new board to combine the brain board and adapter board (and integrate the brain board test circuit too).
Thanks for reporting back. What pin is the DESAT pin? Is it on the v3 board or the adapter board?
There are 5 fault signals on CN3 of the adapter board that are all tied to this pin. Johannes noted these pins in a post a few pages back in this forum topic.
johu wrote: ↑Fri Feb 28, 2020 4:47 pm
That is very useful feedback. Too bad the universal brain board approach doesn't work here. How much extra room would there need to be? Would it work upside down?
The DESAT pin feeds into a NAND tree, i.e. it must be high in order for PWM to run. Inversion needed... Maybe an NPN transistor for now
It might work with the brain board on the bottom side of the adapter board. I will take a look when I'm back in the shop on the weekend.
Another option would be to rearrange the adapter board so the brain board can sit right on top of the adapter board and be soldered to it instead of having to use female headers. Currently female headers are needed because the brain board would otherwise collide with CN4 and CN5, and the WiFi module would collide with CN1. If the brain board could be moved up a few mm on the adapter board then it would no longer collide with CN4 and CN5, and CN1 could be moved to the other side of the WiFi module. In this case, the brain board would be able to sit low enough on the adapter board to fit in the inverter enclosure.
I will add a transistor to invert the DESAT signal on the next board I order. Simple fix to the problem.
Thanks. After removing DESAT pin, did you just have to put power to pin 7 and connect grounds to get the inverter working? I tried and had no luck.
electric_e60 wrote: ↑Thu Mar 05, 2020 5:59 pm
Thanks. After removing DESAT pin, did you just have to put power to pin 7 and connect grounds to get the inverter working? I tried and had no luck.
Here are the basic steps I followed to get the motor spinning:
Connect the brain board to get Gen 1 adapter board with DESAT pin removed
Connect the start pin (pin 7) to the 12V pin
Apply 12V and GND
From the web interface:
Load the Leaf configuration file from the wiki and save it to flash: https://openinverter.org/wiki/Configuration_Files
FYI: I had to remove the last comma from this JSON file for it to upload properly!