The Ossie motor

[woopy]

Hi all


Made some mosfet try with different pull up resistors and of course different results    seems that the Buz 11 is more easy to use , than the IRF 450.

But now i have to decide for a scaling up  and probably i will make a mix with very thin but 3 or 4 layers heavy copper wire (1 mm ) so i can draw much current  and very thin air gap with  more  coils probaly by pairs in serie.

I mean i plan to  make at first   4 separated power circuits for 4 pairs of coils in serie. So i can increase or decrease the power of the motor by simply adding more or less circuit in work. and no need of complex electronic . so you have  a 4 gears. And as i have noticed that  those pulse motor do not accelerate as crazy i think a 4 gears motor could be a basis for a usefull and very simple set up. ?

>So a concept with    big diameter     slow rotating   sandwitch  with Attraction simultaneous with repulsion  pulsed rotor     seems to be a good candidate.

And of course if we can get or store some flyback energy, it will be great and better and if perhaps the silmultaneous attraction and repulsion pulse could diminish the Lenz effect  ,    perhaps ?

But without testing   no results  so lets go

good luck at all and thanks for bringing your feedback



by the way Jb,  be carefull of flybackgreatwhitesharksenergy   hehe !


laurent

[Jimboot]

Woopy
I have to say that those coils are just too little wire and too low of a resistance. make your coil thick. I am going to post a vid and you decide. If you do as I say you will have some big coils in there in a heartbeat. The back emf off of them will be enough to run a whole other motor very well without any more draw from the original battery, Or just send the bemf back to the batt as always.
But those skimpy coils aint gunna do it.  My coils in this vid are in parallel and measure .45ohm tot. But you can do series if you like, try it both ways.

you may have to make the rotor more sturdy as you will see. =]

http://www.youtube.com/watch?v=b7PR8JEVp7A

mags

Mags that is sick! Love that sound. Catching up with all your posts now to replicate

[Magluvin]

Thanks Jim 
The rotor is made from 1/2 in pvc board. Light, rigid and easy to work with. The bearing is from a HD. This rotor has been many motors. It started of as a Whipmag version I called the Robowhip.  I use the PVC for everything that does not need to be heavy. Comes in 1/8 to a couple in. thick in 4x8 sheet or to a cut length sold by the foot.
Depending on where you are, price is a different thing. Here it is a bit less than plexi. But its lighter and easier to work with. Comes in black and gray also. Bonds with resin and superglue. And with super glue, the bond is stronger than the material itself. I buy superglue in 2oz bottles from the hobby shop. Sanding is a breeze and no floating dust. its one of my favorite materials. I even make subwoofer enclosures with it for cars. With inner support frame to stop large area flex. Its more expensive than wood, but better tech advantages.

At the time of the vid you liked, I was only concerned with how much rotor action I could get from THIS set of batteries. I started in the out beginning with tick tick tick at 120 rpms. but what is that. All in all we need to figure out how to get powerful motors more efficient, not reinvent huge clock mechanisms. Sound good?  =]

Look at some brushless motor designs on the internet. I suddenly feel small. These guys are already approaching 100% eff  especially no load.  That is our starting point. We are working with no loads. It tells us nothing. It gives us nothing.  One thing we have to remember. In order to see or get a gain of 1 type of energy, it must be converted to another form and reconverted back to the original form. Our advantages need to take place in the conversions.
In these awesome setups you all have going, speed will be of the essence. Speed is power. Throw a pebble at me and i will laugh, shoot a bullet at at me and I will die. How much energy would be spent throwing the pebble all your might as compared to the fizzle in the shell pushing the bullet?  Well to extract the first half of that data would be a myth busters project, and I cant say they  wouldnt have trouble with that. Ive seen where they couldt have done better. We all have.   Here is the problem, using the human body to throw the pebble as fast as we can, energy needs to be spent getting the body to move also. You can work on the best, most eff way to move the body in a way to get the pebble to go as fast as you can. O now when we see the demonstration of it, by 5 different examples, how much energy total can you imagine being expelled into that throw, or flick, as a whole. Flick is something to think about here in the comparison and would hold substance in the analogy.. Some just may be able to flick the pebble faster than any throw. Maybe. Now the flick is getting closer to being the gun shot than the throw. I said closer, not close.  =]

So tighten these things up and get some speed going, then work on how to keep it or even make it faster, by using less power. Using Mosfets is ok. Just because they cannot dump as much current as a reed, well this just means you are using less input. No losses there, its less resistance than  the resistor you put in there isnt it?  But the reeds do provide impact, impulses.
Imagine if You had 10 different sets of coils to try. from small to big, deep and wide, 1 set is going to shine. Imagine 30 sets. 1 will shine.   Results from 1 random choice of base components will hold you at that level of the game. 
Its expensive to experiment ideally.
But these are just my thoughts and Im always glad to help and share. That is what this place is all about.


Think gun shot, Think dc impulse.  My bullets are small, but I have 16 of them. Machine gun. =]

Mags

[Magluvin]

Hey Jim and all
In that high speed vid above, the voltage you see on the meter is the voltage across the 5 ohm 5w resistor while it is consuming Back EMF only. This is 2.5w of power being consumed  by the resistor CONTINUOUSLY. While the rotor is being pulsed. Not continuously. If I pull the resistor out of the circuit, my battery input will stay the same, so this is energy that is normally wasted and ignored. you guys are using it in sending it back to the battery and that is fine, Im jus explaining a portion of the vid that may not be clear while watching it because it was a continuation from previous vids at the time.

Mag

[Jimboot]

Thanks Mags,
That further helps my understanding. I have so many ideas bouncing around now for improved rotor design etc it's hard to know sometimes what to focus on. Your explanation helps me to sift some of my ideas.