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

[Over Goat]

Hi everyone,

as promised, here is a test of verpies circuit which I've connected to my pulse motor to which I made a new drive coil for on Metglas core.
I also did a true motor efficient (electrical to mechanical) load test using a generator coil as load on the pulse motors magnet rotor.
@ MileHigh, finally a pulse motor that can do more the just turn a rotor!
The results are quite good I would say.

Link to video: https://www.youtube.com/watch?v=FxSccG5DNFM

Enjoy

Luc

very interesting results, what are the potential applications for this?

[synchro1]

Hi everyone,

as promised, here is a test of verpies circuit which I've connected to my pulse motor to which I made a new drive coil for on Metglas core.
I also did a true motor efficient (electrical to mechanical) load test using a generator coil as load on the pulse motors magnet rotor.
@ MileHigh, finally a pulse motor that can do more the just turn a rotor!
The results are quite good I would say.

Link to video: https://www.youtube.com/watch?v=FxSccG5DNFM

Enjoy

Luc

@Gotoluc,

What's the COP?

[gotoluc]

very interesting results, what are the potential applications for this?

More efficient electrical power generation.

Luc

[gotoluc]

@Gotoluc,

What's the COP?

I'll let the experts decide!... but I'm sure you must have a general  idea of it?

Luc

[verpies]

as promised, here is a test of verpies circuit which I've connected to my pulse motor

I appreciate delivering on your promise.
I think only the opto conditioning and timing circuits were designed by me, the power switching circuit was designed by you.
The small cap on the 40106's input is adding a little hysteresis and low pass filtering to the opto's signal.

BTW: How do you like positioning the driving pulse electronically, without having to physically move the opto?

to which I made a new drive coil for on Metglas core.

These are nice looking coils.  Did you glue the windings together?
What are their inductances and resistances ?

I also did a true motor efficient (electrical to mechanical) load test using a generator coil as load on the pulse motors magnet rotor.
@ MileHigh, finally a pulse motor that can do more the just turn a rotor!

This motor has three outputs:
1) The 100Ω resistor across the "generating coil"
2) "flyback" recovery cap and "draining pot"
3) Mechanical

The average power dissipated #1 is the easiest to calculate as P=V_RMS²/R which calculates to: P = (7.12V)²/100Ω = 0.507W or  507mW.

The average "flyback" energy #2 captured in 1 cycle is the peak voltage across the recovery capacitor squared, times capacitance and divided by two or E=½CV² , which calculates to: E=½*34.2μF*(10V)² = ½ * 0.0000342F *100V² = 0.00171J = 1.71mJ
But the motor runs at about 65Hz under load (pls verify), so we have 65 * 1.71mJ = 111.15mJ per second or 111.15mW.
The average "flyback" power is actually more than 111mW, because that "draining pot" keeps draining the 34.2μF cap even while this cap is being charged. (no periodic discharge circuit like Itsu's). 
...and if the "draining pot" is wirewound and inductive, that it forms an LCR circuit with the 34.2μF cap creating an interesting problem...

The mechanical output #3 remains a mystery unless you are willing to calculate the bearing and windage losses ...or play with prony brakes.

Can we have the schematic of the power pulsing circuit ?  with the power transistor, flyback diode and all...
Also, it would be nice if you'd care to scope the signals going to these multimeters by using AC channel coupling on your scope.  Watch for a groundloop!

If you keep mentioning incremental input power in comparison to absolute output power, then a cerberus will descend from a high mountain and chew you out. From what height?  ...about a mile, I guess.


P.S.
The current waveforms are not easily explainable on your scopeshots.  I can smell a "back EMF" discussion brewing.