Search found 271 matches

by coleasterling
Sep 18 2020 11:23pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 469
Views: 105463

Re: Axiom: a 100kW+ motor controller

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!
by coleasterling
Sep 17 2020 8:48pm
Forum: Motor Technology
Topic: Axiom: a 100kW+ motor controller
Replies: 469
Views: 105463

Re: Axiom: a 100kW+ motor controller

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 ...
by coleasterling
Sep 07 2020 10:33am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1231
Views: 111118

Re: APL's DIY axial-flux motor

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...
by coleasterling
Sep 01 2020 10:02am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1231
Views: 111118

Re: APL's DIY axial-flux motor

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 ...
by coleasterling
Aug 28 2020 8:06pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1231
Views: 111118

Re: APL's DIY axial-flux motor

Fantastic sir!! Looks awesome! Congrats on the first spin!
by coleasterling
Aug 19 2020 5:59pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1231
Views: 111118

Re: APL's DIY axial-flux motor

That last one is a dang good shot! You care if I throw it on my instagram?
by coleasterling
Aug 17 2020 1:48pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1231
Views: 111118

Re: APL's DIY axial-flux motor

Looking great, sir!
by coleasterling
Aug 11 2020 10:22am
Forum: Motor Technology
Topic: I'm looking for developers/engineers interested in high current (+1kA) controller development
Replies: 11
Views: 741

Re: I'm looking for developers/engineers interested in high current (+1kA) controller development

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...
by coleasterling
Jul 29 2020 5:47pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1231
Views: 111118

Re: APL's DIY axial-flux motor

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...
by coleasterling
Jul 27 2020 11:36am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1231
Views: 111118

Re: APL's DIY axial-flux motor

I like #2, personally. Sorry you're having issues!
by coleasterling
Jul 24 2020 3:17pm
Forum: Electric Watercraft
Topic: Simple Outboard Conversion
Replies: 12
Views: 2742

Re: Simple Outboard Conversion

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.
by coleasterling
Jul 24 2020 1:50pm
Forum: Electric Watercraft
Topic: Simple Outboard Conversion
Replies: 12
Views: 2742

Re: Simple Outboard Conversion

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...
by coleasterling
Jul 24 2020 12:53pm
Forum: Electric Watercraft
Topic: Simple Outboard Conversion
Replies: 12
Views: 2742

Re: Simple Outboard Conversion

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...
by coleasterling
Jul 24 2020 12:46pm
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 173
Views: 36143

Re: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+

Little bit more elegant than mine. I wish I had thought to cut the housing, would have made it much easier.
by coleasterling
Jul 16 2020 2:15pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1231
Views: 111118

Re: APL's DIY axial-flux motor

Looking good, looking good!
by coleasterling
Jul 14 2020 12:36pm
Forum: Motor Technology
Topic: My1020 / Kunray / YaLU 1000 - 2000W motor ?
Replies: 70
Views: 9148

Re: My1020 / Kunray / YaLU 1000 - 2000W motor ?

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...
by coleasterling
Jun 30 2020 10:50pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1231
Views: 111118

Re: APL's DIY axial-flux motor

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.
by coleasterling
May 12 2020 12:25pm
Forum: Motor Technology
Topic: Brushed Controller from Salvage 3-Phase Inverter?
Replies: 1
Views: 137

Brushed Controller from Salvage 3-Phase Inverter?

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...
by coleasterling
May 12 2020 12:22pm
Forum: Items for Sale - Used
Topic: WTB - 120V+ Brushed Controller
Replies: 1
Views: 172

WTB - 120V+ Brushed Controller

I'm looking for a 120V Brushed controller. Anyone have one laying around? Only need 200A battery, 100Aish continuous.
by coleasterling
May 11 2020 11:46am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1231
Views: 111118

Re: APL's DIY axial-flux motor

Looks awesome! Thanks for taking such good photos and thanks for the compliments!
by coleasterling
May 02 2020 1:17pm
Forum: Motor Technology
Topic: GM BAS Gen1/2007-2009: Worthy to mess with?
Replies: 6
Views: 343

Re: GM BAS Gen1/2007-2009: Worthy to mess with?

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.
by coleasterling
Apr 17 2020 1:05pm
Forum: Motor Technology
Topic: The HI-Lebowski: a Lebowski SMD brain running a zombified Honda IMA Inverter: *a HOW-TO guide*
Replies: 41
Views: 3510

Re: Lebowski SMD brain running a zombified Honda IMA Inverter: *a HOW-TO guide*

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!
by coleasterling
Apr 13 2020 3:50pm
Forum: Motor Technology
Topic: Mid-drive IPM motor options?
Replies: 42
Views: 2265

Re: Mid-drive IPM motor options?

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...
by coleasterling
Apr 09 2020 12:44pm
Forum: Motor Technology
Topic: Roman Kostrygin - Sur-Ron 16kw outrunner
Replies: 66
Views: 8977

Re: Roman Kostrygin - Sur-Ron 16kw outrunner

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.
by coleasterling
Mar 25 2020 6:21pm
Forum: Motor Technology
Topic: Lebowski's motor controller IC, schematic & setup, new v2.A1
Replies: 1820
Views: 228222

Re: Lebowski's motor controller IC, schematic & setup, new v2.A1

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...