The VESC’s L and & R measurements are completely off from what my LCR measures, maybe that has something to do with it? FOC should theoretically scale up to any sized motor, so long as the P and I gain are adjusted accordingly for the measured L & R.
Also, field weakening is impossible for a PMSM, since well, the field is created by permanent magnets.
Filed weakening has been done on VESCs and we will probably see a menu bar for that in the near future.
Big motor detection is not an issue. You may not want to use the wizard though. Vedder will ad a bigger motor to the wizard soon.
The VESC’s L and & R measurements are completely off
Maybe just by a factor. The VESC might measure only one phase and not across all phases. It depends on the value.
heard the same about the tattuu lipos.
So No one in here, using those turnigy batteries 
Regarding vesc. The moment we have a 100v vesc with field weakening, and is working reliable for bigger motors (officiel specs off mine is 3000watt and v-slot magnets) I come back
Sorry for my ignorance but is field weakening a software sided feature or hardware?
Using them for spot welder. 3s2p pack. Pretty good. Big foot print.
I used these nickel plated copper foil clamps:
Tattu is still selling these:
I have 4 atm. Might get more.
I pulled 200a for a second out of a 12s pack with out puff or too much heat. 65a average.
Do you how many cycles you have on yours? My turnigys got the slightest bit puffy on their 2nd or 3rd charge and now its past 50charges I can barely close my enclosure <|:(.
@MoeStooge and @davidbonde have used them in an 8s configuration for the stoogerace boards. The big bad race winning board uses packs from Maxamps.
200amp in a 1 or 2p config. ?
Is anyone else thinking about the monstrously large packs that could be built with these?
I’ve been doing some drawing for an at-style build lately and with the enclosure space I have laid out on that I could fit something like 60 of these cells in…
They’re far less dense than liion cells but the price makes them so tantalizing…
150km range…
Mind that those cells are actually LiPos and not Liions, although they are advertised as lithium ion.
Also they are used and more like 6-7Ah according to some guy on the old forum. And they are very heavy compared to 18650s.
I’ve been asking and asking if anyone was doing this or whether or not it would work ok. You da man!
Guess I should assemble my KWeld and slap some spin08HP together. I need a 3S BMS and charger for the setup too I suppose.
I’m testing my extra cells at the moment. The first one was 7.68Ah from 3.2 - 4.15v
I just bought a pair so I hope they hold up! Will be throwing a smart BMS in front to make sure they don’t puff
Interesting…
Do they sag much?
@Silverline 1p. 2 6s tattus in series.
I shrink wrapped and armored mine.
For size comparison, unfinished pack on right is a 6s of spim08 pouches. They would roughly take up 4x the space to a comparable tattu pack.
@Fosterqc
I use the little RC volt checkers. Some have low voltage programmable alarms. Then use a hobby charger to charge faster and have the ability to monitor p group IRs.
At the end of the day, just use a high C hrb 3s pack. 60$, done and done.
Ugh I hate going to hobbyking for just one thing.
I’ll wait for them to have xt90s in stock, and probably just pick up a graphene lipo.
The spin08HP cells probably wouldn’t last very long being used with a spot welder.
@Silverline
Here is a turn key solution, pricey but easy.
https://www.genstattu.com/tattu-plus-25c-22000mah-12s1p-as150-smart-lipo-battery.html
Looks pretty nice yes… But a bit pricey, since i´m on 20s
@Jordicious I have some voltage sag when pulling 180 amp…
I’m going to replace cell 19, and hopefully it will help a little bit.
