As soon as the contactor shuts the current limit fault is active and the motor will only turn at a very slow speed. I have outputs from both current sensors and the max current settings are well above this so should not be a problem. Any ideas?
Tesla SDU Current Limit Fault
Tesla SDU Current Limit Fault
Hi all I have a SDU that has recently been assembled with the V6 board. I have 3 Tesla Modules in series for the power supply.
As soon as the contactor shuts the current limit fault is active and the motor will only turn at a very slow speed. I have outputs from both current sensors and the max current settings are well above this so should not be a problem. Any ideas?
As soon as the contactor shuts the current limit fault is active and the motor will only turn at a very slow speed. I have outputs from both current sensors and the max current settings are well above this so should not be a problem. Any ideas?
Re: Tesla SDU Current Limit Fault
Do your ocurlim and il1 and 2 gains share the same sign? i.e. if one is negative, they all must be.
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Isaac96
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Re: Tesla SDU Current Limit Fault
Also what is iacmax set to? CURRENTLIMIT likes to fire seemingly randomly, but it will show when iacmax is reached.
3 Tesla modules is 72v - are you running in manual mode? See the wiki - the 'schematics and instructions' page has a guide for using manual mode.
Also make sure fmin is low (0.2 is good).
-Isaac
3 Tesla modules is 72v - are you running in manual mode? See the wiki - the 'schematics and instructions' page has a guide for using manual mode.
Also make sure fmin is low (0.2 is good).
-Isaac
Re: Tesla SDU Current Limit Fault
Thanks for the suggestions guys.
Jon were you meaning the settings I dont quite understand the question sorry.
Isaac IACMAX is set to 5000 so well and truly above. I did bring this down to just a few amps and was able to see an increase in motor speed as I increased it until about the 5 amp area where no further increase was seen im guessing because of the error state.
I have read the Wiki about manual mode. I lowered fmin from 1 to 0.2 but no change.
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Jon were you meaning the settings I dont quite understand the question sorry.
Isaac IACMAX is set to 5000 so well and truly above. I did bring this down to just a few amps and was able to see an increase in motor speed as I increased it until about the 5 amp area where no further increase was seen im guessing because of the error state.
I have read the Wiki about manual mode. I lowered fmin from 1 to 0.2 but no change.
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Isaac96
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Re: Tesla SDU Current Limit Fault
Can you look at the parameter file here? https://openinverter.org/wiki/Configuration_Files
Re: Tesla SDU Current Limit Fault
Definitely that ^Isaac96 wrote: ↑Thu Jul 30, 2020 4:47 pm Can you look at the parameter file here? https://openinverter.org/wiki/Configuration_Files
It appears you have a number of settings that are way off a known working parameter set.
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Isaac96
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Re: Tesla SDU Current Limit Fault
Generally it's a combination of a few settings. Can you flash the settings from the wiki page please? Or download your settings and post the .json? (much easier to compare, screenshots are rather a pain).
Which firmware version are you on?
Often turning slowly is a symptom of a reversed encoder, but that's unlikely given that you're using an SDU.
Which firmware version are you on?
Often turning slowly is a symptom of a reversed encoder, but that's unlikely given that you're using an SDU.
Re: Tesla SDU Current Limit Fault
Thanks Isaac I just flashed with SDU Macro parameters and the motor now spins up freely. The current limit fault still popped up but I think were on the right track. Very happy