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

[tinman]

Verpies I've been trying to get my head around what you said. Below is a screenshot from 2010 when I was working on the ossie motor. I assumed at the time the spikes were pulses from the reeds and the sine was from the spinning magnets. I have this wrong it seems? I thought that in a pulse situation a current would induced in the coil by the magnets when the dc pulse was not present. From memory that build had 4 coils but I'd have to go back and check.

[tinman]

How large is the yellow gap in your design ?

10mm

Could you be closing the flux path through the yellow gap as depicted with the red flux lines ?

Only when the laminated blocks on the rotor are further than 10mm away from the C core inductor.

Are you using ferrite, solid steel, or laminated steel?  If it is the latter, then which way are the laminations oriented ?

Laminated transformer core from the transformers that the C core inductor is made from. They are orientated the same way as the inductors core.

I know you have 2 coils in your C-core.  Does their flux add or subtract?  ...in other words if the coils were free to slide left & right, would they attract or repel?

Have tried both ways-found attraction mode to be better than bucking mode.

[gotoluc]

Well its much the same-just on a smaller scale. My laminated blocks are to small, but if I swap the stepper motor out for some free running bearings, then it spins up just fine-like yours. But this design has no torque-that much is true.

If I had of taken a little time to think about it, then I already have the most efficient motor of this type-that being the RT. The only difference between the two is your design has a lump ofstell laminates being pulled toward an electromagnet, and the RT has an electromagnet being pulled toward a lump of steel laminates. So the two are one in the same. But as we have seen, the RT is capable of far more torque, and using the flyback increases the efficiency by about 80%.

So in all reality, I have already done extensive testing on this type of motor


Brad.

I agree and have been working on my next version

https://www.youtube.com/watch?v=LMWQwRt1KNc

Luc

[Yttrium]

Hi all,

i've been exploring this concept from a slightly different angle.

It's a fact that, given the same power input to two inductors of the same resistance, the inductor with twice the length of wire (and half the per-metre resistance) will give you a stronger magnetic field. For the same power input.

This is what Joseph Newman's motor was based on.

He used ten watts input to a very large coil, and the magnetic field it created was strong enough to rotate a 600LB magnet.

He then designed an elegant mechanical commutator to motor and generate at the right times and for the right durations.

Looking at how people rewired various Rotoverter incarnations, i think they were sinking the energy from the collapsing fields back in to aid rotation.

Looking at other inventions, it may be the basis for many of them.

The high impedance coils, as Gyulasun said, inhibit the maximum RPM, so we have to keep the resistance low, but this results in larger coils.

It's an effect that can be exploited with varied geometries and i look forward to exploring it here.


Y.

[Jimboot]

Thanks brad that is what I thought, I must have misunderstood verpies thanks. Btw nice little "fail" very nice demo.