Re: DC Reso Charging

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

Original poster: "S & J Young by way of Terry Fritz <teslalist-at-qwest-dot-net>" <youngs-at-konnections-dot-net>

Jolyon,

Something to think about.  DC Resonant charging, as the name implies, has a
time constant (half a cycle of charging choke & tank cap resonant
frequency).  I think your ignition coil would need to apply power to the
reactor for the full half cycle to be succesful.  You will need to determine
if this will be the case for the pulse duration of your ignition coil
output.  In any case - seems cheap enough to go ahead and try it and see if
it works.

--Steve Y.


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, May 25, 2003 3:50 PM
Subject: DC Reso Charging


 > 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?
 >
 >
 >