Re: power transformers efficiency

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Steve Conner <steve@xxxxxxxxxxxx>

At 11:04 19/11/05 -0700, you wrote:
> there is no any resonant charging in my psu, coz i hate any resonances
> in psu

Your design is a DC resonant charging system, just with no filter 
capacitor on the HV DC bus. Since you are firing at 100bps, you don't 
need the filter capacitor. You are right, there should be no charging 
resonances (they are de-Q'd by the diodes) so it's probably wrong to 
call it DC "resonant".


> hey, Steve - i don`t claim anything - i even don`t have a coil yet!

I wasn't referring to anything you had written, but Malcolm's claim 
for huge sparks from 135 watts :-) It's a classic example of how a 
coil can draw more than you think it should.


> i just ask you, who have coils,  what`s wrong in my ideas.

I can't see anything wrong with any of the designs you posted. The 
power supply looks fine, and I don't know the answers to any of the 
questions you asked on output voltage and spark propagation.


>  really - let`s imagine that my coil will draw _only_ 1.5 times more
> than i assumed - 3kw instead of 2kw. it  means, that 1kw would be
> wasted into heating the transformers and inductors?

No, it could mean that the bang energy is 1.5 times bigger than you 
thought, or the break rate is 1.5 times faster. That is what happened 
in Malcolm's old coil- the breakrate was 4 times faster than he 
assumed, so it was processing about 4 times more power.

A static gap just makes a hissing sound and it's hard to tell by ear 
what the breakrate really is. With a rotary gap, the breakrate is 
always correct, but it's still possible for the voltage to resonate 
higher than you expect, making the bang energy bigger. IIRC, Gerry 
Reynolds has documented how this happens in the case of an NST going 
into ferroresonance.

Steve Conner
http://www.scopeboy.com/