ES 1.0 Graveyard

Sounds great, looking forward to it.

That sounds great - look forward to it.

The ones of more interest to me for smaller applications are the axial flux PCB motors.

Talking with E-Circuit Motors this week to see what's viable in the single digit kW range to mfr in place of the crap Chinese motors.

Curious... how are you generating the "spark" RPM signal for the Mychron?

The spreadsheet has been updated with the most recent 4680 cell information for the curious. https://docs.google.com/spreadsheets/d/17zbJZlLocxkfjNDHHixH1WDFVqIe6gAd/edit?usp=sharing&ouid=101726208843306593820&rtpof=true&sd=true Still no DHX P60 motor or any indication on when they will ...

nuxland wrote: ↑

Nov 07 2021 4:04pm

Did they start producing these motors already?

I see that they are now shipping the P40 motors to alpha+ testers. I have no idea what they mean by + unless they paid a lot to get one early or something.

"My plan is to build a pure racing kart that has absolutely no BLING BLING and that won't look like a spaceship Elon has developed."

LOL. Subscribed.

Getting closer to committing the case and rotor design to CNC $$$. Having them reviewed for manufacturing suggestions currently. No blockers so far that I haven't been able to overcome. Chip and embedded controller supplies have been the biggest hassle so far, making do with what I can get vs what I...

The clutch option is to smooth out the start, that's all. It has nothing to do with saving battery. It may not be necessary, but it will be an option based on testing and software development.

I hope to change that equation so that electric karts don't need nearly as many batteries with a new motor design that is high kw/hp but low torque. Possibly the first electric kart that needs a clutch like a 2-stroke - the trade-off for high speed efficiency. So far no technical road-blocks, just e...

BTW I've been working on my own motor design for the last 6 months or so as I got tired of waiting. I may still beat them to the punch with my first prototype, hopefully around April next year.

They have shown pictures of them testing the P20s and P40s on twitter and Instagram. I don't know how far off a production release is...

Magnetism is an interesting study where only some normal electronics knowledge applies. This is a set of coils of 26 windings each, with 8 layers - all electrically separate and then connected in parallel. What I think should happen: 1. Resistance placed in parallel divides by their values. This pro...

In Oklahoma, ERs are currently overrun by people who have taken horse dewormer in hopes of fighting COVID. That's not the way to do it. Completely untrue story that's been debunked and retracted. I can easily get very effective and safe (no hoping required) human approved Ivermectin with a prescrip...

I took this still of the "space boot". It looks like there are about 17 turns and 5 layers, for ~85 turns in total. That's for what I would assume (60s) are larger ceramic magnets of about 1/2 the strength of my N52 cubes. So somewhere around 200 turns might be about right. My plan is to s...

The 1" N52 cube magnets showed up. This is the flux field with a magnet and iron mu metal. IMG_20210831_074701_137.jpg However 7 turns of 19 gauge wire were not enough even at ~12v / 700 amps (bypassed resistor). However I did learn that even at that current level the wire does not even get war...

Shouldn't the reverse bias diodes being absorbing most of that?

My current understanding is that you want very low impedance if you are going for a high RPM motor. Or I guess you can have less poles. I am curious how the 20k+ Tesla motors are setup.

I now have a rough take for a starting place with experimentation. This uses MOSFETs to pulse the coil in one direction and then the other, using code to pulse the coils timed with the rotor and speed of course. :D The resistors to ground may or may not be required, but here they help to drain the c...

Thanks for sorting it out! I work in IT and know how painful unexpected issues can become, especially when people are breathing down your neck asking how much longer is it going to be down...

IDK, I DID NOT PLAN THIS!

Yes, space boots, using PMs with coils. Same configuration for the motor design.

I know it is not inertia - but I don't know how else to explain the flux effect.

Good points, thanks. "The thing I don't follow about the description of the Flynn motor is they say the magnetic flux "keeps going in the same direction" after the pulse ends, which makes no sense to me unless the core has residual magnetism, which would be lossy." This is true. ...

Scratch that... concept is good but that circuit won't work because the primary charge time is too slow. Just activating the coils directly works better, at least in simulation.

If nothing else, this is fun and is helping me to get back into electronics after working too long in IT.

Note, although it is using a similar idea to Flynns control coil use, I'm using a quick spike to change flux direction, not drive the coils "continuously". This is much more like how Radus setup the astronaut boots. I've done some more research on how to drive the control coils next to the...

To flip the flux direction I need to quickly energize the coils. That needs lots of voltage (cheep battery and wire size compared to current). What does that today? Coilpacks on a combustion engine. They produce strong, quick pulses to fire spark-plugs. Timing of the example circuit below allows for...