Heur, I see that you are driving the MOT with AC voltage, and the secondary side is pretty much like Stan's. When using the 8xa circuit, your power from the variac is run through a full bridge rectifier. Have you tried that? Is the MOT fully stock? By that I mean , did you modify it? Some people remove a some of the current limiting part from it, so there is only the primary and secondary windings. Doing this I think makes it very likely to shock the hell out of you or even kill you.
I would say that the high current you are seeing when you raise the voltage may be do to the out of resonance condition you are working at. Because you are not able to change the frequency from the variac from the 50hz or 60hz your using driving the circuit at, you aren't able to tune into the LC circuit you have. Each choke (inductance) and cell (capacitance) will resonate at a given frequency. So you are asking the primary side of the MOT to operate at a frequency it isn't happy at. If you were to size the cell and chokes to resonate at the 50hz or 60hz, then I would expect you would see the input power to the MOT drop. That's just my thoughts, I may be wrong. But this set up with the chokes and cell are meant to be used in resonance. You don't have the means to tune into resonance with a fixed frequency input.
Thanks for the feed back.
Yes i have tried using a full wave bridge rectifier on the primary side of the MOT..
and I dont recomend it. :thumbdown:
. The MOT does not like dc pulses it does :nono:
not function properly all sorts of bad stuff starts to happen.
Burned up one variac, burned up a PWM and I forget how many bridge rectifiers i burned befrore i gave up trying to use DC pulses on the MOT lol. In short MOT's will not function with DC Pulses on the primary.
The MOT that im using I havent modified in any way. just used it strait off the microwave oven.
just havent used the capacitor that it came with.
probably the only other option i have is to just add the trigering circuit like you had mentioned thats included in the 8xa.
Controling the secondary frequency i can test and see if my primary drops or goes up in amps.
Still trying to analyze why more power on the primary...
something i forgot to mention dont know if its that important but
when i was taking the primary reading on one leg the amps would be lets say at 8amps and the other leg would show 3 amps.
now that was little wierd becouse i can understand that when there are multiple lines or phases.
but in this scenario ther is only one line. and the "neutral" wire should have the same balance load as the "hot" or line wire.
in reality the "neutral" wire is realy only "neutral" when two diff phase lines cancel themselves while consuming same load then the common wire becomes the "neutral".
this is not the case in this application :huh:
why then the difference in load?
same amperage should be flowing in both the hot and "neutral" wire.