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H-Bridge Rotary. Was Last Erg.
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From: L.Robertson [SMTP:LWRobertson-at-email.msn-dot-com]
Sent: Monday, June 08, 1998 1:11 PM
To: Tesla Builders
Subject: H-Bridge Rotary. Was Last Erg.
Bert and all ...
Let me try to explain why I think I won't need ballasting,
even with a pig. Of course the last laugh has been on
me before, but this time I think I have an airtight case.
A short description of my setup - it has been some
time since the last go round [:-)
A variac feeds the HV transformers, as we still need
voltage control to keep things from getting out of hand.
HV AC goes straight to a diode bridge, then through an
RF filter to a storage cap, 1.8uF -at- 60 kV. The primary
resonance cap is alternately pulse charged positive and
negative repetitively by the rotary gap. This primary cap
is now 0.012 uF, so each bang takes about 1% of the
energy in the storage cap.
There is never any short across the transformer output
as there is when the gap fires on an AC coil. The faster
the rotary turns, the more times per second the small
cap is charged; and the more current is necessary to
keep the storage cap full, but the transformer never sees
intermittent low impedance loads, and thus, I say, doesn't
need a current limiter.
Except in case of component failure, where I'm hoping
a circuit breaker will do.
Cheers ...
LR