Reactive power - Reactive Generator research from GotoLuc - discussion thread

[poynt99]

Interesting Luc.

There are a number of things going on that are affecting the scope measurement. Also note that most of the power from the FG is being wasted inside the FG's 50 Ohm output resistor.

If you look at the wave forms when the circuit is connected, you will notice that the math trace indicates almost as much negative power as positive power. You judge this by estimating the area inside the trace. It comes down to comparing the area inside the positive triangular shape vs. the area inside the long/shallow negative shape. They seem pretty close, but I would guess judging by eye (not always a reliable method) that the positive area is larger. A good indicator if you are searching for OU.

Another way you can try to see what the net MEAN is, is to adjust the time (horizontal axis) so that precisely one cycle is displayed on the screen. You may have to go out of horizontal cal for this. Then see what the math mean indicates.

The "modulation" you are seeing can be due to one of two things, or even both; 1) Moire patterns and 2) undersampling in the scope. The fact that the mean varies so much as you change the time base settings is cause for concern. When those math peaks appear and disappear, or seem to jump up and down in amplitude, that is usually the result of undersampling. The longer you make the time base setting to display more cycles, the worse the problem becomes. If the scope has a relatively short or small memory depth then these problems can rear their ugly heads.

[itsu]

Because the circuit(s) are in resonance (Fo), and a parallel LC circuit (input) has a high impedance and high voltage at Fo, while a series LC circuit (output) has a low impedance and high current at Fo.

Intriguing stuff, as it LOOKS like we have 2 parallel LC circuits, but indeed, one (the output) is also (and here acts like) a series LC circuit.

I made a replication of this circuit and made some voltage and current measurements with the scope.
We do have some coupling between the both coils as, when at resonance, both bulps light up at the same time.
Also it seems to me that the both bulb voltages act as CSR's and can be used to indicate the current (leading / trailing the SG voltage at the input)

Video here: http://www.youtube.com/watch?v=_WU2SrKDNY4&feature=youtu.be

Regards Itsu

[synchro1]

Hi PW, poynt99 and all,

I have a new video of the same Bifilar Troid under test but using a 1 Ohm 5% Metal Film Resistor as CSR.

The other change is I thought of the trick of using a magnet on the toroid core with a pickup coil to see if I could pickup power at a lower frequency then Mhz range.
Turns out I can light an LED at 625Hz with zero cost to the input power. However, we still have a problem as the mean is Positive with Ch 2 inverted or a Negative with it not inverted.

I'll leave it to you Pros to figure out. Anyone is welcome to join in if you feel up to the task.

Link to video: http://www.youtube.com/watch?v=cQe49jH_3lA&feature=youtu.be

Please note an error on my part in the video, I keep saying the time division is micro seconds when it's mostly all in milli seconds.

Luc

625 hertz is divisible by the Shumman constant of 7.8, nearly exactly 80 times. Does this indicate the possible existence of an oscillating frequency of magnetisem harmonic?

[MileHigh]

Another awesome clip Itsu!

[Farmhand]

It depends on the globes used, power applied ect. and the current caused. If the globe in series with the primary requires more current to glow than is supplied to the transformer to light up the other globe then it won't even glow.

I think one point that should not be overlooked is that when Itsu tuned it to full resonance the bulb in the primary glowed a bit, showing more input at full resonance than when just off a fraction. To me this says the current input at full resonance is just enough to light the bulb in the primary circuit.

By the way Itsu how did you get an Oscilloscope with "Australian Defence Force" written on it ? 

Cheers