Endless Sphere

HighHopes wrote: ↑

Sep 17 2020 9:27pm

i am not aware. my mechanical skillz are near 0.. i am making the first draft as best as i can before it goes to our mech expert for cleanup. feel free to give me more advice

Hey, shoot me a PM. I'm happy to help however I can!

designing the enclosure with integrated cooling today. its not ideal because i'm dealing with constraints.. shown below is the bottom where the coolant flows (there will be a waterproof coverplate not shown). the otherside is where the IGBT modules sit, that side will have a flatness spec. this is ...

I like the design, but if you're planning on that being one piece, Ti is probably out. Relatively thin plate is not too bad, but when you start upping the thickness to large diameter rod or billet...wheeeewww. I was thinking of a plate similar to what you have now when talking about my surplus mater...

The best material I can think of would be titanium, but that's probably too expensive. Titanium is a very poor conductor so would minimize losses compared to aluminum. Any kind of metal is going to need a slot to break the loop around the cores. 300 series stainless steel (non-magnetic) would also ...

Fantastic sir!! Looks awesome! Congrats on the first spin!

That last one is a dang good shot! You care if I throw it on my instagram?

Looking great, sir!

I've tried this on a couple of projects before, and it hasn't ever gotten very far (both my fault and others), but I'm interested in helping however I can. I'm useless for the electrical design, but am an ME by degree and own a CNC shop. I've started a team building a land speed record motorcycle fo...

Ya, no tapered roller bearings unless you are seeing much, much higher combined loading. A pair of deep groove ball bearings is ideal for this situation. One thing to be aware of is that you need to preload the set to remove any slop. Did you calculate preload and shim the bearings any? I don't reme...

I like #2, personally. Sorry you're having issues!

Looks like a nice setup begging for better batteries and more voltage!

It was originally 8hp at...5000? rpm. We're doing around 5100rpm measured flat out with an 7.5" two blade with what we think is a 6 pitch.

The batteries are great, just heavy and have a very low volumetric energy density.

Thank you! It took long enough! We were waiting for the boat to be restored by the customer for a good year of that, though. That's an interesting question. I originally approached this thinking we'd be able to drive the prop as hard as we wanted, but we ended up being severely RPM-limited. We looke...

To the top! This one is FINALLY done. Check out the links below. We took several test trips to a friend's awesome personal ski lake and had a blast proving out the system, then handed over the keys to our customer a couple weeks ago. It will do 13mph with around 400lbs in adults and 17mph with a sin...

Little bit more elegant than mine. I wish I had thought to cut the housing, would have made it much easier.

Looking good, looking good!

It appears so but that doesn't make any sense. That's why I want to try the motor with my Kelly controller. Flip a phase and the matching hall the motor will spin backwards and give you that power in forward rotation if it's the case. E.g. yellow to green phase and halls then blue to blue on both p...

If there's another try at it, I can round those corners in the mill. Sorry, I should have thought to do that on those, too.

I'm in need of a higher voltage DC controller (120V nominal, ish) and am on a tight budget. Anyone ever done a brain like Lebowski's, but for DC drive? I've seen Paul's DC version of his big inverter and would imagine I could do something similar with an IMA inverter. Same long leads for better curr...

I'm looking for a 120V Brushed controller. Anyone have one laying around? Only need 200A battery, 100Aish continuous.

Looks awesome! Thanks for taking such good photos and thanks for the compliments!

If you have the voltage to run it to its potential, the Hyundai HSG is a far better option than either BAS/eAssist motor. There are several threads on it now.

I'm excited to see this! Kiwi and I keep saying "we" are working on it because my company is funding his work, but make no mistake, he is the electronics brain here. I just buy the stuff, tear it apart, and send it his way to be modified and iterated-on!

If you're worried about size, then MG1 is way too big. Kiwi and I are working on a Hyundai HSG project right now. Stock, the housing is about the size of a normal truck alternator, which is too big for my application. I'm building a housing for it now, and will report back after all this corona crap...

I have no dog in this fight, but...In the end, you sold him a motor that you hadn't fully qualified and tested. While he seemed to understand the risk, that's still bad form. As evidenced by the destruction, 10krpm is a lot of energy with that mass and diameter.

https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=1B300-RMX-0031&_sacat=0 There's a search with better terms. Not as cheap as the first I linked, but still pretty cheap. They are a single motor drive module, not dual like the prius/volt/VW/etc...Yes, I'm 100% sure that is the inverte...