The problem with traction control as I posted in one of my videos is what happens when only one side of the esc faults (this was purely from bench testing). Then the other side which wants to keep running instead gets into a weird brake and go state, rather than just continuing to spin meanwhile the other side just loses power.
My fear is, this was what threw me way off balance one time when I was on track.
Otherwise yeah I think this would’ve been a great thing to try.
Right now the faults I’m trying to diagnose are coming simply from bench testing where I just pin the throttle. If I ease into full throttle seems fine.
Alright visited the candy shop and spent the day with @poastoast mainly. Things in the order that we tried.
Showed Poast my issues and we tried throwing his Maytech motors, 170kv. Interestingly no fault on the bench. Wow interesting and quick. Made me thought of @sugandese bet about high Kv.
So then we thought ok maybe it’s Kv let’s drop to reacher 190 Kv, nope faulted. Drop to reacher 175 Kv, nope also faulted maybe not as much I don’t quite remember. So, these controllers really don’t like the reachers I guess which wasn’t really a good sign.
Poast recently discovered the BLDC wizard and suggested we try that, maybe simpler == better? At reacher 175 Kv no Bldc tuning of any sorts, NO FAULTS!? Interesting ok ok. Let’s drop ramp time back down to 0.2 to make it spicy, still no fault.
Alright things are looking good. Now time to jump back to reacher 205 Kv on Bldc, no faults!
Wow things are looking good. Not a lot of daylight left so went for some test runs real quick. Got some cogging right off the bat. We did notice some value truncation in the hall table so I’ll have to redo those detections maybe. Also, to me currently BLDC feels mushier than FOC on start and braking but maybe I’m imagining things. Will need to test more.
Also, did a tiny bit of tuning using @Tony_Stark suggestions
So, thoughts on the issue idk maybe some weird mcu chips or something? ESC can’t handle the FOC computations when combined with reachers .
Anyways stay tuned for some hard pushing to see where we at. And who knows maybe I’ll even drop it down to 0 ramp time
To get FOC detection working accurately you need to tweak the detection parameters to account for the high erpm. Often overcurrent fault is caused by poor calibration.
Any recommendation on what numbers to tweak first to get better results? I think I saw somewhere someone mentioned detection using one of the heavier motors, but you get that scary pop up so I wasn’t sure I should.
I’ve tweaked the detection parameters to account for the higher erpm.
It’s also possible that the FOC algorithms are just struggling to control the motors at such low duty cycles as would be required to prevent huge currents at 21S. It might be ramping up the duty too quick and then overshooting the target current. There are gain settings for this but Mr vedders descriptions are not really clear enough for me to understand what does what so I haven’t played with any of that stuff yet.
Dude Liam your settings are clutch! Preliminary bench testing is showing good signs, no faults! Unfortunately it’s dark and wet out now so I couldn’t go test it out on the street.
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! It does feel like it’s ramping up too quickly and overshooting. At some point I’ll revisit FOC and try this.