I have the Little FOCer for this kind of thing.
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Test unit did up to 140A on the bench with 16S battery. Itās now time to toss this unit on something for field testing. If that goes well, then Iāll crank out some more test units for other testers!
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Just did a test ride on my ebike. 16S, 120A motor, and 60A battery. No issues. Will crank up to 140A for round 2
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Using a Kranked Motor ?
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No but that would be cool. My ebike has a MXUS 3K Turbo hub motor
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Going to Ben Walker in Switzerland tomorrow and bring him his Kranked Kit.
He is also working on other bikes and ordered a lightning-rods motor
I think he has also a https://www.revx.cz/
If you are looking for someone testing he can do it.
In Champery they have steep trails.
He can do 5000 ft uphill on full power.
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Yeah Iāll have to see if the CFOC3 fits for his rig!
Not sure if anyone has asked but do we have a confirmed size for these? They look pretty big
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Maybe not the right topic but Shaman have you ever worked on very low power BLDC systems, 5W or less? Iām trying to work out which if any approach would work for a project. It seems thereās a decent market for highly integrated ICs with FETs onboard for computer cooling fans so thatās easy enough but they have some power limits, and I canāt easily find gate drivers suitable for such low power. The gate drivers seem to start at higher voltages.
Any experience with small stuff like that? I canāt seem to find any existing projects other than this smart knob so I can copy their homework
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When the idea about cfoc3 was first brought up I understood the board size and hole dimensions would stay the same to keep the unit compatable with with CFOC2 powered devices.
@shaman can you confirm will cfoc 3 stick to the previous gen board size and hole layout, or will it be different?
Also Iām super excited seeing these coming to fruition so fast. Keep up the good work!
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Same PCB size as the CFOC2 but now the caps are over the PCB actually making the footprint smaller
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Boy - I made a major mistake when trying to determine dimensions from the pic. Thanks for the response.
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thats pretty chonky sheesh 
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I donāt have experience on this low power stuff unfortunately. I would normally go browse TIās motor drive IC product line but idk how well stocked they are these days.
Have you checked Adafruit and Sparkfun? They might have a board that would work. Instructables or the other DIY sites perhaps?
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This might be interesting for you
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You should visit simplefocās forum as well, you can find a couple of interesting designs there.
For example this one
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Been going well with the field testing, any major problems?
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