Real OU-Effect to Share with everyone!!!

[duff]

Below are my notes & results on the latest round of tests in which I am trying to determine if the commutator/brushes will produce NRG's results.


Connecting the scope across the capacitor and turning the motor slowly so that the pulses are generated at a rate of about 3 per second produces several hundred volt spikes but not consistently.

To determine if the capacitor is maintaining a 300+ volts charge,  I changed the discharge timing to discharge just before acquiring another charge. The charge shorting bar width is 0.25"/6.4mm, discharge bar width is 0.34"/8.6mm, and commutator circumference is 3.00"/76.2mm.

Due to much noise I replaced one of the #24 wire brushes with a #18 wire. This gave a little more contact area and lowered its resistance.

Using the #18 wire on the left brush, which is the capacitor shorting switch, seem to lower the noise. I noted some spikes of 200 to 300 volts and occasionally the capacitor would charge to 300+ volts (as a result of one switching event) and maintain the voltage till discharged into the battery (one revolution).

I need to improve the brushes to reduce the noise and resistance. Hopefully that will produce consistent results which I DO NOT  currently have. I've also noted that the brushes get a carbon build up fairly rapidly.

Can the commutator produce the effect? - Yes, but not consistently with the current brush implementation.


@Poynt99

I tried the circuit variation you posted.

To compare the results of the original NGR circuit with the Diode version, I made 30 strikes on the metal strip of each circuit and recorded the voltages.

The original NRG circuit produced an average of 191V with the maximum voltage being 338V

The modified circuit with the diode produced an average of 98V with a maximum voltage of 190V.

I also tried connecting the shorting capacitor switch, SW2, to the metal strip and striking with only SW1. That produced 0 volts.


-Duff

[poynt99]

OK Duff, thanks for trying that.

Could there be something that makes electrolytics more "receptive" to charge if they are shorted just before charging?

The only other thing that comes to mind is the addition of SW1 introduces one more "noisy" contact which may result in more pulses through the coil resulting in a higher end-voltage on the cap.

.99

[PaulLowrance]

The modified circuit with the diode produced an average of 98V with a maximum voltage of 190V.

What's the diode part #?

PL

[poynt99]

What's the diode part #?

PL

Duff,

As Paul is alluding to here, try again with 2 MUR1560 (or equivalent) diodes in series.

Slow, low reverse voltage diodes will probably kill the effect.

.99

[PaulLowrance]

As Paul is alluding to here, try again with 2 MUR1560 (or equivalent) diodes in series.

That will work. Although just one MUR1560 should suffice, no?  The reverse breakdown, Vr, of the MUR1560 is 600V. One will have less losses then two in-series.

PL