DC Reso Charging

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jolyon Vater Cox by way of Terry Fritz <teslalist-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>

Dear List,
Would it be possible to implement DC Resonant Charging for a TC with a dual 
ignition-coil power supply, by using the secondaries of a couple of the 
more modern flyback transformers (the cylindrical models with integral 
rectification) as charging chokes? Using flybacks in this way, would it not 
be possible to integrate all the rectifiers, charging chokes plus de-Q-ing 
diodes into two small units?

BTW, I did once try to measure resistance of the HT winding of a flyback 
-it is so high that practically impossible to read on a normal multimeter, 
so the current flowing through it in normal operation must be very low -a 
milliamp or two at most.

I would imagine the inductance of the secondary winding of a flyback 
transformer must be fairly high although the Q might not be
-due to high resistance of the winding might although this might not be a 
bad thing considering the de-Q-ing diode normally included in DC reso 
setups/ what do you think?.

Is it at all likely the current from the ignition coil will damage the 
flyback winding when it is used in this way, and would the total PIV of all 
the diodes in diode-split winding be likely to be sufficient to withstand 
the reverse voltage?

If it is possible for a flyback secondary to provide the services of a high 
inductance coil capable of withstanding high voltages
with the bonus of the diodes to provide rectification and de-Q-ing, are 
there likely to be any other problems which could prevent these coils being 
successfully used as charging chokes in  small DC-reso charging schemes, 
for example, in mini TCs?