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

[verpies]

Part of the cause of the voltage drop on the above scope shot is the power supply is limited to 3 amps. Even though I have a 100,000uf tank before the switch my DMM displays a voltage drop when the switch closes. So I added a second power supply and it helped a little. See below new scope shot. However, the current is so demanding (without the magnet rotor assisting) that I have nothing else available that can mantain the 2vdc when the switch closes.

That 100mF cap should not discharge that much in several milliseconds, but I can live with the voltage drop if I know where it comes from.
Anyway, the good way to combat the excessive input current is to decrease the pulse width and increase the voltage.  Note my statement about the break even point that I've just mentioned to Itsu and the graph below.

Practically, if you are not seeing sawtooth or triangular current waveforms flowing through that inductor during energizing it by a constant voltage source and a resistance, then you are wasting energy in that resistance.
Look at the dashed yellow curve: cut that curve with a vertical line at 0.5 Tau and you get a triangle (sawtooth wave) - that's good.
...but cut that curve at 2 Tau and you don't get a triangle any more ...more like a rounded triangle - that's bad.

[MileHigh]

Itsu

It is good to see that even with the all north up rotor,there was no energy cost to spin your rotor as MH seems to think there should be.

Brad

You have zero data to state that there was no energy cost for Itsu to spin his rotor.  What is readily apparent when looking at his waveforms is that the current draw increases when he removes his rotor, just like it happens in your setup.

[verpies]

I do not see any difference in Itsu's current waveforms (green) ...maybe, just maybe more amplitude and more flattening in the stopped case, but I would not swear by it.

[MileHigh]

Looking at the pair of waveforms in the center of the screen, look where each one crosses relative to the (+1, +1) major division point.  The one with the rotor in place passes more or less right through the point, while for the one without the rotor in place, the lower limit of the noise band clears the point.  The area under the no-rotor waveform is clearly larger.

[Yttrium]

I'm having trouble getting decent spikes.

The first thing i wanted to do was ascertain the difference in the magnetic fields of two inductors when supplied with the same input.

I know it's physics fact but i like to hold it in my hands.

Inductor 1  is 0.25mm wire and very close to 40 ohms, weighing ~50g.
Inductor 2 is 0.355mm wire and very close to 40 ohms, weighing ~200g.

My Henry meter is broken so no idea there, but the important thing is the comparison, if we charge coil 1, cut the power, dump to cap, how many volts do we have, then same for coil 2 ... coil 3 is 800g ...

I made a small pulse motor, saw regular 60V spikes, normal RMS was around 9.

But i don't like Bedini motors, Fakient spikes and the rest so tried it solid-state.

I replaced the trigger coil with a pulse-train, and tested coils 1 and 2 in place of the normal power coil.

The spikes are shit, i can only assume it's because there isn't a Neo flying overhead and inducing into the power as well as the trigger coil.

Perhaps the larger spikes are due to opposing, collapsing fields, as mentioned everywhere in the literature, since simply cutting juice doesn't give a large collapse field.


Y.