Figured out why I was getting OC faults while blasting the throttle. This is precisely what the positive/negative ramping time in PPM is. with a sudden increase in current, the VESC pulls too much too fast due to the abrupt PPM signal change. Using a positive ramping time will give it some breathing room to gradually bring up the current to the requested levels without causing a huge spike.
I’m finding .2s to be satisfactory in relieving OC faults on the bench. Will test in the field tomorrow.
Oh @scepterr, I went back to FOC on 2.54 and I noticed something strange. After setting it up and detection, I found that I can ramp to full duty cycle at about 30% throttle, but anything after that makes the motor spin at a lower pitch sound, like there’s resistance or something. This doesn’t happen on 3.29 so I think i’ll stick on the newer f/w; I feel like I’m going to blow a DRV with that sound.
For the OC issue on 3.28/3.29 yes, for the weird change in pitch, no…
I tried FOC once before on 2.54, but I forgot which of the Ollin VESCs I used, at high eRPM the motor would cog and spaz the fuck out so I was really afraid to try again. This time it didn’t cog, but made a disconcerting lower pitch whine.
I’m working on my Carvon V3 with a Raptor 1 deck. These are my last two changes, (80 Motor max was recommended by Carvon). In the first setting I was getting cogging when I pushed the throttle too hard so I messed with it and got the the second settings which got rid of the cogging but now I have weak brakes that won’t even stop me. Any idea of what I need to change to get brakes back but not have cogging?
@scepterr@Eboosted Ugh one issue solved, another arises. Now when I’m going a certain duty cycle and apply more throttle on a slight/moderate incline, the board stutters for a second like it’s out of sync. I’m assuming this only happens uphill since downhill doesn’t apply much current.
Any ideas guys? I’ll try to get a fault reading later
nah these are new and full charge. I did notice that when it happens the motors are making a louder than average whine. At high and low duty it doesn’t make that loud whine.
Something I was thinking about today…
Motor detection is best with battery that will be used…but typically that would be done with a full battery, while actual use will be at nominal voltage at least 70% of the time. Detection results do vary with voltage…so would it be best to do detection with battery at nominal voltage?
