Permanent magnet assisted motor coil designs

[captainpecan]

Just a quick update. I still need to tune it. I just lined up the switches real quick and test out my connections. Runs good. Pretty efficient. I was just playing around and turning down the voltage until it stalls just to see. And I'm actually very surprised with the amount of magnets, and steel in this thing, as well as a flywheel that has to be more than 6 lbs. It spins at 3.6v and only 2ma... now, of course this is barely spinning at all, but I did not expect this with so much high resistance wire. There are 6 coils, but each pulse uses 2 in series which equal 5200 turns of 30 awg wire at between 160 and 170 ohms. At higher speeds I'm working out some balance issues and stuff. I have not let it go over 300 rpm yet until I tune it better and make sure it won't self destruct when I start feeding it power to see what it can do. I will hopefully start posting some video soon as I get it tuned. This coil method seems to continue to be worth exploring!

[captainpecan]

Here is a little test run video. This is about as fast as I wanted to push it tonight. I don't have a recovery circuit on it yet so I'm kind of pounding the mosfets with flyback at the moment. But I wanted to open it up a little and test things. It has a little torque. Hard to tell by hand, but it feels like useful torque for the speed and better than normal pulse motors for sure. I will find out when I start loading it down a bit.. Kind of a floppy looking build, but hey, it's running! And something I was not expecting... it self starts nicely!!! The timing pulses are stagged just right so that no matter where it rests, it's triggering a pulse. I was aiming for that, but I didn't really expect it yet.

P.S. Not that you guys care, but my better half has informed me I am to tell everyone to ignore the ugly wood floors. Tore up nasty carpet and it's a work in progress.

Here's a test run of it. Pretty efficient so far.
https://youtube.com/shorts/j1MUhXhwRNE?feature=share

[gyulasun]

Hi Captainpecan, 

Nice setup (do not bother about the wood floor beneath it)  and it runs smoothly. Hopefully you can recover a good part of the input power (which now is around 15.4V x 25mA = 0.385W). 
This will presumably increase when the rotor is loaded by the generator coils if you plan to use them. But the flyback recovery will help on this. 
Thanks for showing the tests. 

Gyula 

[kajunbee]

IT IS NOT A BIFILAR. BUT TWO INDUCTORS OF THE THE SAME VALUE ONE WITHIN THE OTHER.
I HAVE NEVER TRIED IT BUT IMAGINING THAT IT WILL ENHANCE THE OUTCOME. DUE TO LINE OF
FORCE COMPRESSION. JUST MONKEY THOUGHT. IT HAS TO BE PROVEN. EASILY TESTED . TWO ELECTROMAGNET
ONE WITH THE SAME LENGTH OF WOUNDED WIRE AS PER THE MONKEY DOUBLE COILS AND CHECK THE MAGNETIC PULL USING
A SCALE. SAME CURRENT SAME VOLTAGE.

@ Seychelles
This is a coaxial transformer I put together a few years back. Since I tested with 60 hertz I was only able to apply around 3 vac before core started to saturate. I used 1/8" tubing with 23 gauge center conductor. Don't remember much results other than coupling between primary and secondary unloaded was near perfect.

Edit: A simple experiment would be wrap some TV coax cable on a core which is what I did at first.

[captainpecan]

Here are a few scope shots. Ignore time and date, I need to set it again. This thing was in my basement for 10 yrs probably. Just thumped the dust off. I am not real good at using one of these, so any suggestions are appreciated. I hooked it across 1 pair of coils to see what's going on. As expected there is a pretty strong spike when it switches off. I had to use 1x probe because i just could not get 10x probe to fit on screen. Those are scope1 and scope2 below. I am a little confused with scope1off below. I took a shot of what is happening after I turn off the power supply and the rotor is still spinning. I wanted to see the difference. But what interests me is that I am still seeing that spike with no pulses? What is going on here? Is that the internal magnetic field from the permanent magnet insidenthe core flipping on its own reacting to the approaching and leaving rotor magnets? It looks like I am getting that flyback spike, without a pulse? Am I reading this wrong? I was visualizing being able to catch the spike as the internal magnet flips back inward, but wasn't really sure if i could actually do it. This looks like I am seeing it here. Thoughts?