Reactive power - Reactive Generator research from GotoLuc - discussion thread

[lancaIV]

gotoluc:
from Barbosa&Leal to their  reference  Camel Eslam Camal to his reference http://www.google.com/patents/DE3736921A1?cl=de

[allcanadian]

@Gotoluc
It's just an LC tank with an extra inductor in place of the generator inductance. The capacitor always charges first as the inductors resist changes in current so why not charge the capacitor?. I'm not sure how most charge an LC tank circuit but pulsing the capacitor with DC from an external inductance (an inductive discharge) is the way I have done it because it is the most efficient way. Think of it as a one way reactive current charging the capacitor every half-cycle periodically adding to the reactive current already present.


As a general rule nothing moves unless it is LC, inductor to cap or cap to inductor.


You can also "ping" the circuit to find it's natural resonant frequency. Charge the cap, close the circuit and note the frequency of oscillation which is the natural resonant frequency of the circuit. Now pulse it at that frequency or use a theshold detector to detect peak voltage and pulse and your there.


AC

[gotoluc]

No problem Luc.
Yes thanks, I would appreciate seeing this. I am not expecting your resulting net power to remain negative. In fact I expect it will go net positive, which would indicate more power going back to the grid than what is being used by the circuit. However, the phase relationship between the current and voltage might change. If it does change and you re-adjust to get your 90 degree phase shift again, the results may be different.

Hi poynt,

please find the attached scope shots below. First is the standard way I've been doing it and the second one is selecting Invert in channel 2 menu.

This is my circuit powered by my variac from the grid and with a 5 Ohm 1% 50w rated load Resistor on the Neutral leg of the primary (per CSR). Channel 3 is displaying the voltage across that load. I didn't connect channel 3 probe ground so not to affect CSR. So all ground points are standard Grid side Neutral after the 0.1 Ohm CSR

Let me know what you thing

Luc

[gotoluc]

@Gotoluc
It's just an LC tank with an extra inductor in place of the generator inductance. The capacitor always charges first as the inductors resist changes in current so why not charge the capacitor?. I'm not sure how most charge an LC tank circuit but pulsing the capacitor with DC from an external inductance (an inductive discharge) is the way I have done it because it is the most efficient way. Think of it as a one way reactive current charging the capacitor every half-cycle periodically adding to the reactive current already present.


As a general rule nothing moves unless it is LC, inductor to cap or cap to inductor.


You can also "ping" the circuit to find it's natural resonant frequency. Charge the cap, close the circuit and note the frequency of oscillation which is the natural resonant frequency of the circuit. Now pulse it at that frequency or use a theshold detector to detect peak voltage and pulse and your there.


AC

I see ... very interesting!

Lots to try

Thanks for sharing

Luc

[gotoluc]

At everyone,

I've attached 2 scope shots. The only change in the circuit  between both scope shots is, the first is with the Secondary shorted and the second is with the Secondary open.

Now you can see what happens in each case and why the preferred is with the secondary shorted.

Luc