Endless Sphere

Good info, thanks guys! I'm going to go ahead and put my brain on top. I want as thin of a package as I can get. I started cutting the second copper plate yesterday and will hopefully have it soldered this weekend. Should be rock and roll after that with the other components.

I'm a little confused. Why are we paralleling resistors instead of just buying single resistors in the power rating we need?


Also, I haven't seen an answer yet as to whether it is a bad idea to mount my brain board on the top, rather than the bottom, yet.

Thanks! If I end up ordering more of these, I may have the plates waterjet. Don't really lend themselves to milling very well. I just cut this one out with the bandsaw (hence the irregularity). Do you think I'll have any issues with mounting the brain on top? Heat maybe? I already soldered the pins,...

I made the slightest bit of progress today, feels good! Please excuse the hackish nature and poor soldering. The extra plate is a little over 1MM thick, with a cross sectional area of 13mm^2 or so. Should be good enough? I hope I got it soldered well. I tinned the board, then tinned both sides of th...

Is there any reason we can't mount the brain board on top of the controller instead of below, as long as there is clearance?

I'm sure you guys will get to assembly before I do, but I'm happy to mill something and send it out. I don't have time to design it, but can throw it in the machine queue no problem.

Received my inverter components and board today. Can't wait to assemble it!

Got my brain board in today. Thanks guys!!

I'd sell them if they got to a point where they could provide them with 17 digit VINs and EPA and DOT compliance.

bionicon wrote: ↑

May 01, 2018 12:29 pm

This is the one with the pear controller:https://www.facebook.com/photo.php?fbid ... ater&ifg=1

Yep, that's it! Thanks!

I'm not sure on that one. I'll see if I can find it again, as it was on Facebook and I'm terrible at navigating that site.

I know someone has gotten one in-hand, as I've seen it on their supermoto build thread. Must be a beta tester or the like.

It was weeks ago for me.

I tried contacting them as well, nothing.

We've been using the 2.5Ah packs in our modified Razor RSF350 and MX350 bikes for racing. They have done very well so far and we all bought them for around $80-90 with charger from eBay or a reseller on Facebook of all places. We're using single batteries with 48V, 1000W controllers with a listed cu...

e-vektor wrote: ↑

Apr 21, 2018 3:34 pm

Here is a params file from the STAR configuration (max 20 HP), but as explained before there are no inductance, resistance, etc...

Awesome, thanks sir!

That's a good question. I've never messed with a custom VCL or characterization.

Would you be willing to share your VCL/settings? Possibly sell them? I'd love to make and market a kit using the Curtis and the e-assist motor.

I just saw this and love what you're doing here. Would you be willing to let me pay you for your design when you're done? That, or I could sponsor you some CNC work in exchange. I own a small CNC manufacturing facility. Feel free to PM me. I'm starting an electric pocket bike racing league and we're...

Any chance you could do some quick DCIR measurements on the 3.5's? I'd need far higher specific power than the 11ah's to warrant purchasing them.

I didn't read this whole thread and can't at all help with the Sevcon programming, but the first thought I had was to run two throttle pots, one running up, one running down. They get checked against each other constantly and if one goes out of spec, error thrown. That's a standard method of running...

If you come up with a heatsink design I'll gladly machine it and send them out to the other beta guys.

So those at 3.5ah look much bigger than the 11ah ones? Any idea on the current capability? Hopefully super high? I have a bunch of the 11ah ones I've been wanting to use, but the current specs aren't high enough to make me use them over my LFP cells.

On this topic, what's y'all's favorite source for wire? I had a site saved years ago for 200C rated stuff, but can't seem to find it now.