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Registered Member #8247
Joined: Thu Nov 22 2012, 03:14AM
Location:
Posts: 18
klugesmith wrote ...
Since there's DC current in T2 primary winding, we can't rule out DC current in its secondary winding.
This is another question I have, so to confirm what your saying here is - based on the laws of inductance it DOES NOT have to be a real AC (oscillating from + to -) coming out of the high voltage transformer then correct? I mean its a DC only sawtooth pattern going in, it can then be a positive only waveform coming out too? Or will it always be a real AC + and - coming out?
Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1714
Ken Williams wrote ... This is another question I have, so to confirm what your saying here is - based on the laws of inductance it DOES NOT have to be a real AC (oscillating from + to -) coming out of the high voltage transformer then correct? I mean its a DC only sawtooth pattern going in, it can then be a positive only waveform coming out too? Or will it always be a real AC + and - coming out?
Thanks for your continued help.
The average -voltage- on each winding is necessarily zero (not counting IR drop). But you can have DC -current- in any number of windings, preferably such that their magnetizing effects (DC ampere-turns) cancel each other. Flyback transformers and converters are common examples.
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
High voltage pulses of the sort that would come from this circuit are notoriously difficult to measure. The entire "free energy" hobbyist "industry" is pretty much based on using these kinds of circuits to fool digital meters into under-reading.
A moving-coil analog meter would be my preferred solution as it will read true average current for pretty much any waveform. Crest factor would be limited by the meter's coil arcing over.
If you're not looking for free energy, you can measure the DC input power to the circuit, estimate losses by feeling how hot the various components get, and use conservation of energy to estimate the output currents. This only works for average current, not RMS.
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Trying to measure spark gaps mA current?
