openinverter Community
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Hi Guys, any body watching the forum anymore? Asked this question a couple days ago.Roadstercycle wrote: ↑Sun Nov 17, 2019 12:08 am Ok guys I got the car running but I need a little help with a setting. I've done the throttle calibration and that's no problem as it's set but I have to push the pedal down too far in my opinion to get moving. What perimeter in the settings adjusts this? I'm a bit nervous to start just going willy nilly on it. Looking forward to getting this down the road.
387 volts right now but can go 400 volts. Also I have blown two 50 ohm 100 watt pre-charge resistors, they may have been cheap Chinese ones. They blow after a couple times being used. Any idea on that?
Why don't you record a video showing the issue? Also publishing the parameter file may give some clues. Everyone here is a volunteer with limited time so the more information you provide the more likely you are to get help.
Well one day isn't a couple of daysRoadstercycle wrote: ↑Mon Nov 18, 2019 10:50 pmHi Guys, any body watching the forum anymore? Asked this question a couple days ago.Roadstercycle wrote: ↑Sun Nov 17, 2019 12:08 am Ok guys I got the car running but I need a little help with a setting. I've done the throttle calibration and that's no problem as it's set but I have to push the pedal down too far in my opinion to get moving. What perimeter in the settings adjusts this? I'm a bit nervous to start just going willy nilly on it. Looking forward to getting this down the road.
Thank you Kevin, Here's the fileKevin Sharpe wrote: ↑Tue Nov 19, 2019 8:51 pmWhy don't you record a video showing the issue? Also publishing the parameter file may give some clues. Everyone here is a volunteer with limited time so the more information you provide the more likely you are to get help.
Sorry Johu, Seemed like 2 days in the states. I left the question at 2:30 AM Ireland time and it was the afternoon here, my bad. Thanks for the insight into brknom and resisters.johu wrote: ↑Tue Nov 19, 2019 9:27 pmWell one day isn't a couple of daysRoadstercycle wrote: ↑Mon Nov 18, 2019 10:50 pmHi Guys, any body watching the forum anymore? Asked this question a couple days ago.Roadstercycle wrote: ↑Sun Nov 17, 2019 12:08 am Ok guys I got the car running but I need a little help with a setting. I've done the throttle calibration and that's no problem as it's set but I have to push the pedal down too far in my opinion to get moving. What perimeter in the settings adjusts this? I'm a bit nervous to start just going willy nilly on it. Looking forward to getting this down the road.
You can get the throttle to react earlier by reducing "brknom". Maximum breaking force will stay unchanged but pedal travel can be adjusted.
Pre-charge: I found initial pulses kill resistors. 50 Ohm means the inrush current is 8A and cheap resistors don't take that very often. Either increase resistance to about 1k (not much capacity in modern inverters anyway) or use a high watt (>50W) wirewound resistor if you insist on fast precharging.
Great... unfortunately I don't understand this stuff but lots people here do
Hi Kevin, My wiring is exactly like the diagrams that are from Damien on this website. I just copied them. I did find out that the resistors where actually Chinese mis-labeled junk. I bought a new one from Ohmlite and it is about 4 times as big as the Chinese one. I believe that should fix that issue, I will find out today.Kevin Sharpe wrote: ↑Wed Nov 20, 2019 10:25 amGreat... unfortunately I don't understand this stuff but lots people here do
I'd strongly recommend posting more details of your wiring/system because you should not be destroying precharge resistors and the Tesla inverter is easy to destroy.
Can you only get a trace while driving the car? Can it be on a lift? How do you trace just Potnom and Pot 1? I could not find an example here how to do it. Sorry to be a noob I just don't want to make a mistake.tom91 wrote: ↑Tue Nov 19, 2019 9:21 pm Specially since your description can have many causes.
Make a trace of Potnom vs Pot1 and see if it makes sense. Does it really take alot of Pot 1 to achieve positive potnom?
If yes off throttle regen is causing the deadspot in the beginning.
If no and it takes alot of Potnom to make the motor spin, check other none throttle related settings.
I did the trace of pot 1 and potnom.johu wrote: ↑Wed Nov 20, 2019 5:20 pm You can trace pot and potnom while stationary. Also read this https://openinverter.org/wiki/Web_Interface
I was able to get the correct traces now, I put the car on the hoist and actually ran it. Pot1 and Potnom seem to go up together pretty nicely but as you said it seems to take a lot of Pot1 to get the motor spinning. Unfortunately without any type of tutorial as to what everything does it's a bit worrisome to just start tweaking things. At the moment I have the exact same settings as Damien on his large motor but I am running the Sport motor so there could be a couple settings that need to be bumped. I'll keep reading and try to figure which ones may need the tweak. It may be the fweak but at this point I do not know how to decipher the motor name plate numbers that Damien talks about in the Motor parameters on the openinverter.org page, that's all it may need. I'm still reading and learning. I am going to try upping the boost a bit at a time.johu wrote: ↑Wed Nov 20, 2019 5:20 pm You can trace pot and potnom while stationary. Also read this https://openinverter.org/wiki/Web_Interface
Roadstercycle wrote: ↑Thu Nov 21, 2019 12:27 amI was able to get the correct traces now, I put the car on the hoist and actually ran it. Pot1 and Potnom seem to go up together pretty nicely but as you said it seems to take a lot of Pot1 to get the motor spinning. Unfortunately without any type of tutorial as to what everything does it's a bit worrisome to just start tweaking things. At the moment I have the exact same settings as Damien on his large motor but I am running the Sport motor so there could be a couple settings that need to be bumped. I'll keep reading and try to figure which ones may need the tweak. It may be the fweak but at this point I do not know how to decipher the motor name plate numbers that Damien talks about in the Motor parameters on the openinverter.org page, that's all it may need. I'm still reading and learning. I am going to try upping the boost a bit at a time.johu wrote: ↑Wed Nov 20, 2019 5:20 pm You can trace pot and potnom while stationary. Also read this https://openinverter.org/wiki/Web_Interface
John, I am reporting back. No noticeable change in throttle. My base throttle is 935, I get no motor movement until 1650 on the trace. About the same as slipstart 50.jon volk wrote: ↑Fri Nov 22, 2019 5:00 pmRoadstercycle wrote: ↑Thu Nov 21, 2019 12:27 amI was able to get the correct traces now, I put the car on the hoist and actually ran it. Pot1 and Potnom seem to go up together pretty nicely but as you said it seems to take a lot of Pot1 to get the motor spinning. Unfortunately without any type of tutorial as to what everything does it's a bit worrisome to just start tweaking things. At the moment I have the exact same settings as Damien on his large motor but I am running the Sport motor so there could be a couple settings that need to be bumped. I'll keep reading and try to figure which ones may need the tweak. It may be the fweak but at this point I do not know how to decipher the motor name plate numbers that Damien talks about in the Motor parameters on the openinverter.org page, that's all it may need. I'm still reading and learning. I am going to try upping the boost a bit at a time.johu wrote: ↑Wed Nov 20, 2019 5:20 pm You can trace pot and potnom while stationary. Also read this https://openinverter.org/wiki/Web_Interface
Change your slipstart value to 35 and report back.
Set the brknom to 0. At what point the motor start spinning then?Roadstercycle wrote: ↑Fri Nov 22, 2019 11:28 pm
John, I am reporting back. No noticeable change in throttle. My base throttle is 935, I get no motor movement until 1650 on the trace. About the same as slipstart 50.
Set the brknom to 0 and the motor starts almost immediately, backed off to 10.tom91 wrote: ↑Fri Nov 22, 2019 11:33 pmSet the brknom to 0. At what point the motor start spinning then?Roadstercycle wrote: ↑Fri Nov 22, 2019 11:28 pm
John, I am reporting back. No noticeable change in throttle. My base throttle is 935, I get no motor movement until 1650 on the trace. About the same as slipstart 50.
Why one part? You wanted the motor to spin sooner so now it does. The section of the throttle that does regen is determined by brknom, nothing else changes not even the regen level.Roadstercycle wrote: ↑Sat Nov 23, 2019 4:30 am
Set the brknom to 0 and the motor starts almost immediately, backed off to 10.
Thank you Tom. One part of the mystery solved unless doing that reflects on other settings.
Thank you Tom, As a noob to all this I was not sure what else may have been affected. I wish I was well versed in the controller aspects so I could do a you tube video to clear up any confusion on all the parameter settings. In the description brknom means Regen pedal travel. Which tells me when you let off the pedal there's a part of the pedal pot where the regen starts. I had no idea it also is when you push the pedal that area of the pedal travel is dead when pushing it. Hopefully this helps someone else in the future, again thank you for helping me out.tom91 wrote: ↑Sat Nov 23, 2019 1:37 pmWhy one part? You wanted the motor to spin sooner so now it does. The section of the throttle that does regen is determined by brknom, nothing else changes not even the regen level.Roadstercycle wrote: ↑Sat Nov 23, 2019 4:30 am
Set the brknom to 0 and the motor starts almost immediately, backed off to 10.
Thank you Tom. One part of the mystery solved unless doing that reflects on other settings.
Any other behaviour that you feel is unexpected.