I don't see any problems in the protocol, but your last question is a good one. Perhaps through capacitive coupling of the windings...
Remove your transformer and short the input leads, and output leads and treat it as a capacitor. See what your capacitor meter measures across the now two leaded component.
I created a simulation of the circuit, and just 100pF from pri-sec has a fairly significant impact on the CVR wave form.
Out of curiosity, have you tried driving this with a proper sine wave at about the same frequency?
I have not tried AC input yet,but will do as soon as i work out what is wrong here.
Tried to measure capacitance the way you said,and cant seem to get a stable reading on the meter.
The battery symbol is not flashing on the DMM,but i will get some new batteries tomorrow,and see if that helps.
At the moment,we are looking for a 192.3% mistake in the power measurements.
Putting aside what i would like it to be,i must stick to what we !believe! to be real,and find out where this measurement error is.
So far i have tried 11 different transformers-all with the E type ferrite core,but only two out of the eleven give these COP>+ results,even though the waveforms all look much the same.
There is nothing special about this circuit. It is just a pulsed transformer,where the secondary go's through a FWBR,and charges a cap. The only thing added is C2--the small 1.4nF cap that is in series with ground and one AC leg of the FWBR.
Tonight i did a self cal on the scope,and nothing changed in way of power measurements--so the scope seems fine.
One question Poynt
Is there a difference between mean and average on the scope,as this new fangdangled 4 channel scope dose not have mean-only average,while my old 2 channel Atten has both.
Too many times in the past,when i though there was really something there,it bit me on the backside,as it always turned out to be something missed that was staring me right in the eyes all along. So this time im looking for a mistake-->there must be a mistake somewhere--right ?.
I have about 8 or 9 of the second transformer i found that showed the !!apparent!! OU results,so ill put another circuit together tomorrow night,and see if we get matching result's,or different results from the same type of transformer.
Anyway,need sleep.
Will report back tomorrow night.
Brad
Never let your schooling get in the way of your education.
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Topic: Parametric Charging (Read 74676 times)
