Endless Sphere

Thank you for the link, but it seems to be dead.

Thanks for the offer on the brain boards! If we do end up needing one, just shoot me an invoice on paypal and I'll take care of it immediately.

flat tire wrote: ↑

May 23 2019 7:55pm

BAC2000 sees my astro 3230 (yes) inductance / resistance as 10 uh / mohms respectively. It can spin that thing really, really fast.

3230? I thought there were only 2? I have one and last I heard, the other wasn't for sale.

Hmm. How much would you say could be shaven off this motor to make it shorter ? There is only so much space left between bike cranks. Also how would you go about machining another rotor? Seems a lot of trouble for little gain. I'll have to disassemble and measure, but will get back to you on that. ...

Ubercool, thanks a lot. Copper fill seems not bad at all. On the other hand, it looks like a pretty tight fit. No chance to trim the 124mm version of this motor to around 100mm. Well, that settles it. The rotor seems rather long but tiny. Smaller dia. than the bbshd. Only 6 poles. That explains the...

Interesting feedback. Do you happen to have some pictures ? 7500RPM is alot though :shock: I'd need to halve it at least to get something useful. That's why I was talking WYE/Delta hack or rewind; not to get more power per weight, but better efficiency at 14s and a medium reduction. Currently looki...

Running one of these on a Razor kid's toy operating at 60V nominal and around 150-160 phase amps and around 120 battery amps. Cheap, relatively heavy, but not bad! We've beat and beat on it and gotten it quite hot (boiling water) with no noticeable degradation to the enamel. I am pretty sure it can ...

No trouble, thank you for all you've done already!

I've contacted Lebowski, but haven't heard back, yet. Kiwi, if you want a shot at it, I'm happy to send your way. I think we'll have to get Lebowski involved somehow, since it'll need a new dspic, but no need to have him do it all.

Ya, good luck. I never got anywhere with that bike. I did use the controller on a mid drive and it magically worked with 20 under "Flux Weakening Level." It was inconsistent in where it came on, though.

That is odd, powering the 5V rail directly would not under normal circumstances cause the magic smoke to escape. If Whereswally606 can't help you can send to me, replacing the DSPIC is not a big deal but I suspect there will be some other debugging required. Thanks sir! I'll keep that in mind. I di...

The first thing you need to do is verify you have +5V going to the brain and +15V going to the fet drivers. No +15V or +5V, both on the power board and powering pin 14 (Edit: This was also a mistake?) with 35V and using pin 21, 17, or 9 as ground. EDIT: Bad, bad, bad news bears. I've apparently kil...

Alright brain trust, tried powering up for the first time and it was a miserable failure. Tried powering up the brain board separately and saw the faintest flicker from an LED, then nothing. I can't see anything obvious as to why there'd be an issue. Anyone want to take a shot at diagnosing the pack...

And we're done, minus our R1 and R2 that I had to order some more resistors for. I elected to go ahead and leave the board on bottom for testing, then will move it to the top later when everything is proven. I need to source some connectors for the brain board external inputs, as well. Any thoughts?...

More progress. Down to the last resistors and then pin headers.

More progress. Got all the components that require high heat done. Still worried I cooked something, but I guess we won't find out until I run the dang thing. I'm hoping it will go a lot more quickly now that the tough stuff is done.

More progress! Got current sensors and the first three fets on. Took a lot of heat, hope I didn't cook something. Also wondering if I should have bent the fet leg to sit on the plate shared by the current sensor instead of passing it through the board. Too late now, anyway.

Posted this on the Facebook group. Finally got some time to work on the board again. I think I finished beefing up the high voltage path, but am open to input. Plates are around 1mm thick. Maybe more beef on the top side closer to the caps?

Okay, that super cool...But I'm confused. Did you buy a surron and disassemble or were you able to buy the frame alone, or what?

Interesting, I never considered timing to be an issue with a controller's ability to spin the motor. I've had several motors with pretty advanced timing and no major issues before now. Regardless, thanks for the lead on the reverse function! It took a little probing, but I found it and got it to wor...

Here's a fun one. Controller works fine on another motor, motor works fine on another controller. I have three valid reverse hall/phase combos, but no forward. From a valid reverse combo, I swapped two phase wires and then went through the hall combinations. There is one that slightly spins, but it ...

I'll leave this here:

https://patents.google.com/patent/US201 ... 0100213786

I'm just tooling away slowly on mine. It'll probably be another month before I'm finished, but I am making progress! Nothing exciting to share yet, though.

Hey Guys! First electric project I've finished (or at least come close to finishing) in awhile. Motor is an ME0709, 1:1 chain drive to the original lower unit shaft with the original splined coupler from the gas power head's crank. It will eventually be running at ~100V nominal and 70-80A, with perf...

Is that assuming you've entered the field weakening region? I wouldn't think it would be an issue until then?

Very interesting! My somewhat uninformed thoughts on the lookup table were much more simple. Instead of commanding D & Q currents directly, the table would consist of load (throttle),rpm, and timing advance, with the assumption that timing advance is the real-world manifestation of D-axis current. S...

Regarding the text of the testing the sum of the amps going into the motor stayed the same at 180A (is that right?, it looks a bit more?) , but the torque increased from about 35Nm to 58Nm somewhere in the middle by just shifting the angle. Yep, pretty much. I believe the test was done at 180A. One...