Electric Motor Secrets

[uusedman]

this is a direct link to the video.

YouTube - Rotary Attraction 1 1

It is alive. YouTube - uusedman's Channel. I posted basic modifications of the rotary attraction motor. It is not running 10,000 Rpm, but it is a running and that is a start .

now, i have to add some other stator and more DC pulse points to get this motor flying.

[Jetijs]

looks good
but what's with the sound? Or is it messed up only on my computer?
And can you perhaps measure the air gap? Also the rotor poles seem odd.

[uusedman]

I belive the quality of the video is terrible. Your computer is fine, don't buy another one.

How do I measure the air gap? (Just be a ruler?)

Yes, the rotors are odd and they are formed as a slanted "X" shape and not the traditional Cross. I am thinking of using only the smaller shaped rotor. Would I have magnetic flux interfering with the large shaped rotor?

looks good
but what's with the sound? Or is it messed up only on my computer?
And can you perhaps measure the air gap? Also the rotor poles seem odd.

[Jetijs]

Use a thickness gauge like this:


The air gap info would be great
You say, that the original coils are not enamel coated. Is this right? How did you tell that? Because this does not make sense to me. Or did I misunderstand you?

[uusedman]

I am on it, hopefully tonight i can have the measurements for you.

I am using 22 gauge 110 windings, is that fine? what do you recommend?

Use a thickness gauge like this:


The air gap info would be great

[Jetijs]

I would use thicker wire, but AWG22 will be just fine for starters. First you need to learn how the motor behaves and get familiar with it. You can always change coils later
Also, some good quality pictures of the rotor and stator (from above view) would be great so that I can make a CAD drawing and figure out the switching sequence.

[LowTechIsCool]

Model numbers

Hi,

I would greatly appreciate a list of model numbers for the different diodes and the capacitor.

With Gratitude,
Chris Corkum

[nali2001]

Hi Uusedman,
Nice motor indeed.
Instead of measuring the airgap, you can also just try how many of sheets of normal paper you can fit in between. One sheet is 0.07mm or 0.0025"

Did your motor came with the controller?

The 'odd' rotor shape is there to allow for good startup behavior. Since with symmetrical reluctance rotors you can get into a 'locked alignment' and the rotor won't start unless you manually give it a nudge.

Regards,
Steven

[uusedman]

thank you. jetis, I will measure with the thickness gauge tomorrow. i ordered this product which will be delivered tomorrow. as soon as i get it, you wil have your precise measurments.

the measurement done by paper is as follows: I was able to put one paper thickness, tried to put 2 paper thickness and it was not possible, the motor was stuck. in conclusion, the airgap based on paper testing scheme is .002 - .003 because of the fact the paper had evidence of marks from the rotor/stator. definetily less than .005.

i did buy a motor with the controller. do you think i can hack the controller to our specifications?

thanks for the explanation of the odd shape design. just a note, there is 4 rotors, 2 small shaped and 2 larger shaped. should i dedicate my setup on the smaller shaped or larger shaped or both? keep in mind the stators are all equal in size.

i hooked up a ac capicator 370 1mf, the motor starting making weird noises and it blew my reed switch. out of curiosty.


latest video with some updates, i added another stator (26 g x apx 150 winding) making the total stators of 2. also, 4 pulse driving the motor. since this motor has 8 stator, it has the potenial of having 8 pulses.

YouTube - Rotary Attraction

Hi Uusedman,
Nice motor indeed.
Instead of measuring the airgap, you can also just try how many of sheets of normal paper you can fit in between. One sheet is 0.07mm or 0.0025"

Did your motor came with the controller?

The 'odd' rotor shape is there to allow for good startup behavior. Since with symmetrical reluctance rotors you can get into a 'locked alignment' and the rotor won't start unless you manually give it a nudge.

Regards,
Steven

[theremart]

Off the shelf Peter's style motor...

this is a direct link to the video.

YouTube - Rotary Attraction 1 1

I am trying to understand why you would remove the coils and replace them with different gauge wire? The rotor looks great does it not as you don't have to do any machining on this setup. I will be watching closely on your results as this is what I have been looking for, a motor that does not require a machine shop to build.

Thanks for sharing

Peter, what do you think the advantages of this setup are, and the limitations?

[uusedman]

I removed the coils because of the following reasons:

- The coils are setup in a AC fashion.

- The coils had no enamel coating, so the magnetic flux needed is going to take higher voltage.

- I had 22 gauge wire on hand from my bedini motor, so I used it to make the stator, though, I decreased the windings to affect the impedance.

- This is very important you understand
**I don't come from a electronic background, bought a couple of books and been experimenting to reach the lvl of knowledge in electronics ** Maybe I was wrong to take out the coils, I thought it would be a better to take them out.

The rotor is amazingly setup and the air gap is about what Dr. Lindemann is asking for. However, I don't know about the odd shaped rotor if it will be an advantage.

Thanks

I am trying to understand why you would remove the coils and replace them with different gauge wire? The rotor looks great does it not as you don't have to do any machining on this setup. I will be watching closely on your results as this is what I have been looking for, a motor that does not require a machine shop to build.

Thanks for sharing

Peter, what do you think the advantages of this setup are, and the limitations?

[broli]

If the windings had no coating isn't this the same as one single winding of a thick wire? What's the point of this?

[uusedman]

This was my thought process that the coil would be converted into lower gauge wire making it 2 or 1 gauge instead of 16.

If the windings had no coating isn't this the same as one single winding of a thick wire? What's the point of this?

[Jetijs]

I doubt that. what is the point of a very big gauge coil if you supply the energy to it via a very small wire.

[uusedman]

The measurement on the thickness gauge is .013 in total, therefore, each side has a .0065 inch air gap.