Mostly Permanent Magnet Motor with minimal Input Power

[broli]

Use a schotky diode in your setup. The coil and cap are an LC tank and all kind of ringing can occur, a diode prevents this and gives one clean pulse plus some energy is stored back into the cap. I'm sure this way you'll discover that a substantial amount of voltage will remain in the cap.

[aaron5120]

Hi folks, awesome work luc, thanks for sharing again the idea.
Hi harti, 3.7% efficiency does not sound right, his coil was hanging there for a moment also.
Math aside, lucs design is somewhat like garry stanleys dual rotor air core pulse motor, in that you can use many more magnets and get ever greater shaft work for the same input, I think it's possible that the math is not correlating between units properly to account for this.
Prony brake would be a better method, no cross unit errors.
Though in lucs design, to add more magnets and keep it from becoming an air core essentially, we'd have to prevent saturation, more ferro material in center core.
peace love light
tyson

Hi Gotoluc, I tend to side with Tyson that a prony brake method to check the output of the DC generator will be a better proof. Still, this contraption is a VERY efficient piston, granted.
The latest YT clip of Luc is self evident in that while the steel laminate is not being saturated by the magnetic flux, the input power can be maintained, all the way the lifting power can be multiplied by the setup. This is proof that the magnets are contributing to the work of lift.
Obviously, there is a lot to be optimized, but the original idea of placing magnets in both ends of the laminated core bar is the real break through. The further concentration of fluxes by means of more bars around the coil( like the previous clip showed by Luc) helps to shape up much more of the efficiency. Coil shorting and BEMF utilization can be posponned because that would over complicate too much a simple but ingenious idea.
This idea by itself is a genius one, because it is simple and elegant.

[powercat]

Hi Luc,
always a pleasure to see your work, the 64 million dollar question is can you make it self-run ?
I hope you will as it's one of the most interesting devices I have seen for a long time.

Good luck and all the best

[TinselKoala]

Just some casual thoughts from an innocent bystander.....

I'd probably try this: a ferromagnetic or soft ferrite coil core that is a hollow cylinder, and a non-magnetic axis for the core to slide on, like an aluminum or plastic rod. I think a lot of flux is being wasted or channelled into parts where it's not doing useful work.

Also.....I think I'd like to achieve "critical damping" in the discharge waveform. That is, one doesn't want ringing, one wants all the cap's energy dissipated into the coil in the first cycle of the "ring". This requires tuning inductance and capacitance together. Diodes will stop ringing but at the cost of dissipating energy where it can't do useful work. You get the most "bang" for your buck if you can dump all the cap energy into the load in the first cycle without any coming back or voltage reversal: the critically damped waveform.

Stefan's math up above looks more complicated than it is. Don't forget "significant digits".... you can safely ignore all but the three leftmost digits in all of those numerical results, because they represent false precision and are certainly wrong,  anywhere except inside the calculator. If you measure 28.7 volts on a 0.3 microFarad capacitor.... which probably has a 20 percent tolerance in its value anyway...... your answer is NOT going to have six or seven meaningful digits, so there is really no point at all in regurgitating them from a calculator display... because they are just wrong (remembering the tolerance in the component's value).
So the energy on a capacitor in Joules is one-half of the Capacitance in Farads, times the square of the Voltage in Volts (this is why higher voltages are better than higher capacitances, usually).  The energy in Joules required to lift a mass (in kilograms) to a certain height (in meters) is just the mass times the height times the local gravity acceleration. If you avoid false precision and just use the digits you are sure of, it is easy to compare the results of the two calculations.

Ok, I'll go back to lurking quietly now.
Go for it, Gotoluc !

[gotoluc]

Thanks for your post TinselKoala.

Math is not my thing!... I have other talents.

I have a new test video uploading now but I can give you the results. So please help me and calculate how this test scores.

The Inductor weighs 115 to 120 grams. I can now lift it 1mm or more using a 0.272uf capacitor charged at 325vdc

How does this now score?

It could get better with stronger magnets but at this time this is all I have

I will post the new video demo as soon as it is ready for viewing

Thanks for your time and help

Luc