Window Motor Doubles Voltage At The Power Supply [Overunity ?]

[lumen]

Yes, It is likely the power supply would not increase in voltage but if the motor was indeed producing an increase in voltage, then it should still show up on the point just after the diode.
In fact you could add another capacitor at this point to create a good point to measure the real voltage generated from the motor.

[DadHav]

Thanks Lumen. That's what I figured you where saying. I'm just not sure how the motor will act with the diode. I'll try it as soon as I can. I just received a schematic for the power supply. I can see right away from the block diagram there is sophisticated voltage and sensing on the output circuit. There may be some trickery going on here, but at least it's not from me.
John

[gyulasun]

Guys. I have another idea that I can't try until I get home again but: If the effect I'm seeing is completely dependent on the impedance matching between the supply and the motor coils, would it be possible to put 2 LAB batteries in series with the power supply, leaving the power supply set at zero volts. Is it possible the circuit would run and charge the filters in the power supply? Is it possible the impedance would stay the same with the power supply unplugged? If this should happen to work it would prove that a substitute input circuit could be made to support the anomaly shown in the video but this time using a battery that might except a charge from the setup. Full of prunes again right?
John

Hi John,

Two comments:
1) the effect i.e. the voltage and current increase you experience does not really depend on the impedance match between the supply and motor coils.
We should study the circuit schematics of your PS and then we could make further conclusions on the effect, seeing the overall circuit what is created when you connect the bridge output to the PS output.
What you suggest to use two series batteries in series with the zero volt output PS is dangerous, you may destroy your PS inside circuits. I would not do such without knowing the inner circuits of the PS.
2) when your PS is unplugged it may or may not have the same output impedance, it all depends the inside circuits (is it a linear or a switch mode supply, in case of the latter the unplugged output impedance may approch that of the operating PS much better than in the first case.

Lumen basically suggest the same diode separation I did, I agree with his drawing, the motor positive wire is to be connected to the diode's cathode point and he shows a puffer capacitor there too, it seems useful to filter the output of your full wave diode bridge.

rgds, Gyula

[DadHav]

Guyula. yes, I recognized your suggestion with the added capacitor from Lumen. Also noted on the power supply warning. You're right. I would be disappointed if I damaged it. I just got the schematics from a friend I can't attach the whole manual because it's 1400KB and I think it's to big to be allowed. I've attached the schematic pages only in case anyone wanted to see them.
Thanks again.
John

[gyulasun]

ok, John tomorrow will have more time to have a look at the schematics.

I still say though that a direct connection of a circuit output back to its input is normally not recommended, some means of isolation (like a transformer in case of the switch mode PS) is needed unless it is inherent in the circuit.

rgds, Gyula