Reactive power - Reactive Generator research from GotoLuc - discussion thread

[poynt99]

Any circuit element other than the pure source itself, is part of the load.

The RG of any function generator is actually part of the load, not the source. Therefore, if one does a source power measurement without somehow excluding RG (either mathematically, or with buffering), then one does not obtain an accurate source power nor polarity.

In this case, it appears only a fraction of total power is lost in RG, perhaps 18%, so the polarity should be correct. I am working on a sim that will hopefully help explain the apparent polarity reversal.

[poynt99]

OK Luc,

I've figured out why the phase of the current probe is reversed, but you'll need to try a test to see if we can get the circuit to operate close to the same without the MOT's. Please replace the MOTs with a small capacitor (CMM) as I am showing in the attached diagram. You may need to try a few different values, and obviously retune for resonance.

[gotoluc]

Thanks poynt, I'll give it a try

Luc

[gotoluc]

OK Luc,

I've figured out why the phase of the current probe is reversed, but you'll need to try a test to see if we can get the circuit to operate close to the same without the MOT's. Please replace the MOTs with a small capacitor (CMM) as I am showing in the attached diagram. You may need to try a few different values, and obviously retune for resonance.

OK poynt,

I replaced the pile of MOT coils and cores with a variable air capacitor to ground like your in diagram. At 27pf I can get the same output 1.5v to the bulb and close to the same phase shift except with the MOT pile the mean is -82mv and with the air capacitor to ground the mean only goes to -65mv.

If this was just capacitance then I don't understand why there would be a difference, so I'm going to do other tests to try to get to the bottom of this.

Thanks

Luc

[poynt99]

Luc,

I'm not sure where that wire going to the MOTs was actually connected once it got there, but you're right, there would be some inductance in series with that capacitor as well. How much, I'm not sure, but at least a few hundred nano-Henries from the connecting wire.

Not sure if that would make the difference or not.