Sharing ideas on how to make a more efficent motor using Flyback (MODERATED)

[gyulasun]

Hi Luc,

I think it is okay you did not choose to use an assist motor but use another stator coil on the same stator to further drive the rotor by the collapsed energy of the first stator coil (if this is correct). 

Even if you expected a bit higher improvement I think the 10% efficiency increase is still nice in your present series of tests and this could surely be improved by running the setup at a higher RPM  (the lower than 1000 RPM was a compromise due to the comparison possibility to the unmodified motor which lacks its RPM control circuit).

So if one of the goals was to prove whether the collapsed energy of a switched stator coil when collected could aid the overall performance of this motor, then you proved it surely could, right?

Thanks for showing these experiments.

Gyula

[gotoluc]

I think it is okay you did not choose to use an assist motor but use another stator coil on the same stator to further drive the rotor by the collapsed energy of the first stator coil (if this is correct). 

Yes, you have it correct.
The reason for deciding to simply use another phase for the flyback was I had 2 phases available and the other main reason is, if I attached a separate motor to assist, we are only dealing with 5 watts of flyback power, so I'm quite sure the 5 watts would of been consumed by the motors baseline losses and in the end not demonstrate any advantage.
One way or the other if I was to design a motor using this concept, I think it would be more efficient to have the assist coils within the same motor.
So what mostly needs to be done is design a stable switching circuit to accomplish this.
I think it's doable with all the component improvements we have had these recent years.

Even if you expected a bit higher improvement I think the 10% efficiency increase is still nice in your present series of tests and this could surely be improved by running the setup at a higher RPM  (the lower than 1000 RPM was a compromise due to the comparison possibility to the unmodified motor which lacks its RPM control circuit).

Yes, I agree!  it's unfortunate I don't have the communication protocol to increase to rpm of the stock motor. The results could be better at higher rpm and under much larger loads?

So if one of the goals was to prove whether the collapsed energy of a switched stator coil when collected could aid the overall performance of this motor, then you proved it surely could, right?

Yes, I am definitely convinced that a switched coil motor performance can be improved by at least 10% (or more) by collecting and re-using its flyback to assist.
If anyone is ready to assist with a $200. donation, I could buy a used Maytag Neptune front loader washing machine which is what these motor are from. This would give me all the circuits to operate the motor at higher rpm which would produce much more test data then what I presently have.

Luc

[gotoluc]

Hi everyone,

I'm building a larger version of one of the concepts I demonstrated in late January. Link to the January video: https://www.youtube.com/watch?v=FxSccG5DNFM   
But it takes time to get parts when you're on a small budget and need to order from China but I may have an update in a week or so.
However, today I received some other parts to test a concept that Robert Murray Smith shared in early February. His video demo: https://www.youtube.com/watch?v=n4YD8Nvyfa4

Here is my version of it: https://www.youtube.com/watch?v=0VlhMI5tv5Y

Luc

[shylo]

Hi Luc, That is very interesting , Tesla showed something similar, I'll have to go back and look for it.
I'm curious as to what pole gets projected out the ends of the I's without putting the keeper on top?
Also instead of draining that cap through the resistor use it to fire your coil and by doing so collect the flyback again and keep using it , it will diminish over time but thats when you hit it with a battery pulse to bring it back to the start.
Can just regular ceramic magnets be used ,I don't have any others except one big neo ring magnet?
Thanks for sharing.
artv

[MagnaProp]

Nice work once again gotoluc!

On the Robert Murray device, I wonder how much shorter you can cut the Alnico magnet? I wonder if soft iron spacers will let you get away with a shorter Alnico and smaller coil so you can use less power to switch it?