Little FOCer! 84V 5kW VESC-Based Controller

Vendor Corner (SERIOUS)
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#721

All of these reports are what I like to have. Feedback on what is going well or what isn’t is what I need to keep the Little FOCer strong and make it better.

Also, I’m being forced to do a revision because of the chip shortage. Something inevitably goes out of stock and I have to design in an alternative. Since I have rev up even for the most minor change, then I might as well add stuff to improve the overall performance of the Little FOCer. That being said, v3.1 is being prototyped. I added some stuff that helps when pushing the Little FOCer to its limits.

6 Likes
#722

Ooo looking forward to it!

1 Like
#723

I was watching a video from Benjamin on silent HFI and was wondering if your controller has phase shunts.

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1 Like
#724

Nope. Low side shunts. It’s easier to do low side shunts with higher operating voltage

2 Likes
#725

Got it. Wonder if he can work with making that silent too :thinking:.

1 Like
#726

Doesn’t sound like it. He explains it in the video but it’s a bit technical. Basically the silent HFI is tied an ability only provided by doing in-line phase current sensing. So vesc 4 wouldn’t be able to do it but any vesc 6 could.

5 Likes
#727

Ahh I see. Thank you. Gonna do some research on 4 vs 6. Never quite understood the difference.

2 Likes
#728

Cool video:

2 Likes
#729

Hey @shaman. Great work and congrats on the accomplishment of the Little FOCer V3!

I’m looking to replace my OneWheel controller with a VESC and was wondering if you had considered adding light bar support to the Little FOCer. I talked to @surfdado about this on discord and he mentioned that currently the VESC open source spec/software doesn’t have support for lights, but if you added hardware support for it he would happily add firmware support for it.

But yeah, it would be nice to have GitHub - thankthemaker/rESCue: rESCue - add more safety and control to your VESC based vehicle built into the little FOCer so it would be truly plug and play replacement.

1 Like
#730

So the Little FOCer’s onboard voltage supplies don’t quite have enough power for a light bar but the spare GPIO pins are there as a way to control external lights if wanted. So if the lights can be powered from a source other than the Little FOCer, then the Little FOCer can control the lights via the GPIO pins with special firmware.

#731

Hmmm, something like this? https://www.amazon.com/Module-Supply-Converter-Non-Isolated-Stabilizer/dp/B09G56C9X5?th=1

#732

Would I also need a mosfet to turn it off when the board is off?

#733
1 Like
#734

Have you looked into the rESCue?

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#735

Finally got a new belt on:

7 Likes
#736

ooooo boyyyy these are the numbers i was looking for. got a full parts list for this? im looking to replicate this somehow

2 Likes
#737

This is awesome! Unlocking the full potential of 250A to the motor. Excellent thermal management!

1 Like
#738

Well I hope to make a how to video of the water block on the focer but other than that I have a razor wiki where most of my parts and advice are at the moment:

2 Likes
#739

Thanks bud. I may tweak some values to try and get more performance out of it later but for now, it’s pretty fun. Thermals look good eh?

1 Like
#740

What is the wheel sprocket fabrication?

1 Like