Search found 41 matches

by Jrbe
Sep 20 2021 6:22pm
Forum: Motor Technology
Topic: DIY Toroidal Axial Flux PM
Replies: 226
Views: 8397

Re: DIY Toroidal Axial Flux PM

Is it worth breaking up the coils into groups? You could then wire in series or parallel to get inductance in a better place. correct me if I am wrong, but trying to get more inductance out of it would only reduce the Kv right? I'm not sure of the answer. I'd expect it's some tradeoff. My assumptio...
by Jrbe
Sep 20 2021 5:27am
Forum: Motor Technology
Topic: DIY Toroidal Axial Flux PM
Replies: 226
Views: 8397

Re: DIY Toroidal Axial Flux PM

Is it worth breaking up the coils into groups? You could then wire in series or parallel to get inductance in a better place.
by Jrbe
Sep 18 2021 6:09pm
Forum: Motor Technology
Topic: DIY Toroidal Axial Flux PM
Replies: 226
Views: 8397

Re: DIY Toroidal Axial Flux PM

I was thinking it could all be SLA printed. Wire could be held in place with little tabs like you see in an oring groove or a wire channel with opposing holder tabs. If built in a clever way you could remove the left side of the ring to allow winder access to the inside. I'll throw some ideas togeth...
by Jrbe
Sep 17 2021 4:29pm
Forum: Motor Technology
Topic: DIY Toroidal Axial Flux PM
Replies: 226
Views: 8397

Re: DIY Toroidal Axial Flux PM

Yellow would be a conductive bushing. Orange is wire. Outer stator.PNG.png One for each phase, rotated 120° each. So 2 outers and one center. It's the first thing I thought of after seeing this, LCM24,22.PNG.png For axial flux the T shape could change to a picture frame wedge shape and rotate maybe ...
by Jrbe
Sep 17 2021 5:59am
Forum: Motor Technology
Topic: DIY Toroidal Axial Flux PM
Replies: 226
Views: 8397

Re: DIY Toroidal Axial Flux PM

I have an idea for the stator. Its not fully fleshed out yet but might help this along. This is drawn up to mxlemming's motor schematic he has in his thread and Halbachhero's outer ring spec. Not sure any of that makes sense together but wanted to get you guys the idea. These are 2mm wide with a sta...
by Jrbe
Sep 16 2021 8:05pm
Forum: Motor Technology
Topic: DIY Toroidal Axial Flux PM
Replies: 226
Views: 8397

Re: DIY Toroidal Axial Flux PM

Do you have ideas on how to improve the next iteration? If not, what are the issues you'd like to fix? Have you found a good source for halbach arc / wedge shaped axial flux magnets? These should eliminate the length / gap / loss you mentioned. I'm not sure what is ideal, If you want the halbach mag...
by Jrbe
Sep 13 2021 7:53pm
Forum: Motor Technology
Topic: DIY Toroidal Axial Flux PM
Replies: 226
Views: 8397

Re: DIY Toroidal Axial Flux PM

Is it worth maybe ruining it by trying to straighten it? You could try to heat it a bit past it's deflection temperature then flatten it with a weight and allow it to cool.
Could be a toaster oven with foil keeping the ir from burning it.
by Jrbe
Sep 10 2021 6:22pm
Forum: Motor Technology
Topic: Building a motor
Replies: 52
Views: 1498

Re: Building a motor

I can't wrap my head around 13hp / 10kw on a bicycle. It seems like power to weight should go out the window when the weight is 90% you. My wife has a 390 KTM Duke. 300lb & 44hp for a 12:1 weight to power. To get the same on a bicycle it should have around 16hp. I've ridden 3:1 weight to power m...
by Jrbe
Sep 10 2021 4:34pm
Forum: Motor Technology
Topic: Building a motor
Replies: 52
Views: 1498

Re: Building a motor

One thing that's put a damper on this is that very recently (thinking last month but I'm not sure) this has appeared: https://www.antinnotech.com/products/ant-innovation-at-12070-lightweight-brushless-dc-outrunner-motor-15kw-with-40kg-thrust-for-electric-paramotor This isn't far off what I'm design...
by Jrbe
Sep 10 2021 4:30pm
Forum: Motor Technology
Topic: Building a motor
Replies: 52
Views: 1498

Re: Building a motor

If you went with that high of a number of pulses you would need a zero point for each, no? I was thinking you were doing what everyone else does for motors like these. I think there are some optical pickups that are stacked, 2 layers of sensors. The Nissan cas is like this, Mazda distributors in the...
by Jrbe
Sep 10 2021 3:51pm
Forum: Motor Technology
Topic: Building a motor
Replies: 52
Views: 1498

Re: Building a motor

Bassackwards derp, I keep forgetting to think inside out. You're right they don't spin and won't move air. You would only need 22 teeth, no? When you say better resolution do you mean a larger diameter? The pictured discs I posted are about 2" / 50mm and I think .048" thick, it's been a wh...
by Jrbe
Sep 10 2021 12:23pm
Forum: Motor Technology
Topic: What hall sensor is that ? Or which one do i need ?
Replies: 3
Views: 113

Re: What hall sensor is that ? Or which one do i need ?

So to start off, this is likely the replacement. I didn't find other options labeled this way. Further, the old hall sensor scraped away to internal connections. You may have blown some parts of the circuitry. Whatever caused the misalignment / play should be fixed or the same thing will happen. You...
by Jrbe
Sep 10 2021 11:22am
Forum: Motor Technology
Topic: DIY Toroidal Axial Flux PM
Replies: 226
Views: 8397

Re: DIY Toroidal Axial Flux PM

You want it to bond though. That way it can put the wire in tension or compression. That's how it helps rigidity / strength.
by Jrbe
Sep 10 2021 11:04am
Forum: Motor Technology
Topic: Building a motor
Replies: 52
Views: 1498

Re: Building a motor

The horrible image I attached is what I meant for making airflow with the laminations. If the red oval slots are cleverly placed /aligned with the winding T shapes you could rotate each lamination 1 position to make a screw / fan shape. It's exaggerated a bunch but helps visually what I meant. As fo...
by Jrbe
Sep 10 2021 10:53am
Forum: Motor Technology
Topic: Building a motor
Replies: 52
Views: 1498

Re: Building a motor

You could likely clearance the hub for the sensors to flush them and maybe even seal off the optical area with a 3D printed cap. Or a 1 or 2 piece cap that doubles as an impeller. You could do the chopper disc inside out and have the sensors inside, not sure if there are any benefits but I think it'...
by Jrbe
Sep 10 2021 8:03am
Forum: Motor Technology
Topic: DIY Toroidal Axial Flux PM
Replies: 226
Views: 8397

Re: DIY Toroidal Axial Flux PM

One thing to try is to see if the resin you use is holding on your wire. It might not be bonding to the wire well. If it's not bonding the wires could just be slipping in the resin like if they're in little tubes. One thing that might help this is adding fiberglass tow in with your winding wires bef...
by Jrbe
Sep 10 2021 6:30am
Forum: Motor Technology
Topic: Building a motor
Replies: 52
Views: 1498

Re: Building a motor

I get using the magnets that are there already for triggering but if the halls go all wonky pushing current, it seems optical could be the way to go. Is it worth adding provisions for them? If you're pressing in an aluminum core would the press fit warp the laminations on you? You could go slip fit,...
by Jrbe
Sep 10 2021 5:41am
Forum: Motor Technology
Topic: What hall sensor is that ? Or which one do i need ?
Replies: 3
Views: 113

Re: What hall sensor is that ? Or which one do i need ?

Looks like a Honeywell SS413A. 13A marking from datasheet. https://sensing.honeywell.com/honeywell-sensing-magnetic-sensor-ic-selection-chart-005984.pdf I'm not great at this but I think the other group of numbers might be a batch number. If your soldering skills are decent you could add some wires ...
by Jrbe
Jul 09 2021 6:28pm
Forum: Motor Technology
Topic: The HI-Lebowski: a Lebowski SMD brain running a zombified Honda IMA Inverter: *a HOW-TO guide*
Replies: 57
Views: 7740

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

Find something to rest your wrist / hand on. Helps to move your fingers instead of trying to move your whole arm or from your elbow. Bringing the whole thing up near shoulder height helps too. Don't arch your back, bring the piece up. Use a thin / sharp tip in the soldering iron and "split"...
by Jrbe
Jun 16 2021 12:09pm
Forum: Motor Technology
Topic: VW ID4 motor breakdown
Replies: 0
Views: 176

VW ID4 motor breakdown

Quite a bit of talking but some great views and design references, https://youtu.be/3Bab6CttkEY I have no idea how the laminations connect to the motor shaft unless it's the 4 long bolts he's mentioning. The green mat is a very interesting view of the magnetism lines. Wouldn't these stagger mess wit...
by Jrbe
Jun 16 2021 6:33am
Forum: Motor Technology
Topic: Direct Torque Control insights and examples?
Replies: 6
Views: 439

Re: Direct Torque Control insights and examples?

Seems like decent info here, https://www.motioncontroltips.com/what-is-direct-torque-control-dtc-for-ac-induction-motors/ There's a decent visual of the control loops but no examples. And a quick read to me they're claiming it's a faster and more accurate way of delivering the requested torque. The ...
by Jrbe
Jun 01 2021 7:49pm
Forum: Battery Technology
Topic: TIG welding battery strips
Replies: 30
Views: 1205

Re: TIG welding battery strips

https://weldingweb.com/vbb/threads/138901-How-do-you-guys-weld-pop-soda-beer-cans-together/page4 Beer can cut in half and welded. https://www.amadaweldtech.eu/knowlegde-base/welding-conductive-battery-interconnects A battery "spot welder" that is effectively a tig welder from ze Germans. S...
by Jrbe
Jun 01 2021 8:17am
Forum: Battery Technology
Topic: TIG welding battery strips
Replies: 30
Views: 1205

Re: TIG welding battery strips

I have not attempted to weld a battery yet. A really good tig welder (person) can weld a cut beer can together. A good tig welder (machine) can set the current to 1A, can set a duration, pulse time, etc. The pedal / finger controller gives you 0-100% of the current setting. Problem is without destro...
by Jrbe
May 19 2021 4:47am
Forum: Motor Technology
Topic: Another SMD lebowski PCB
Replies: 159
Views: 23567

Re: Another SMD lebowski PCB

bigmotherwhale wrote:
May 12 2021 1:05pm
Any of these brain board or brain board PCB's for sale?

I can order a bunch from JLC but i thought i would try here first as I only need 1.
Did you look at how far off this was from JLC assembly? They have a large pool of components they stock and only build with their components.
by Jrbe
May 18 2021 1:41pm
Forum: Motor Technology
Topic: VESC modularity / standarization?
Replies: 23
Views: 796

Re: VESC modularity / standarization?

2.54mm / .100" pitch are common, have solder cup, screw terminal, screwless terminals, headers, and wire to board connectors. Plenty of decent options there for internal stuff. For the external stuff that's where I see this waterproofing falling apart. A lot of these sealed connectors need to b...