Re: Time constant between primary and secondary (fwd)

---------- Forwarded message ----------
Date: Wed, 17 Dec 1997 13:54:27 -0800
From: "Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Time constant between primary and secondary (fwd)

Tesla List wrote:

>     I understand that the primary and secondary frequencies should be
> identical (1 / 2 pi sqrt(LC)).  But it seems to me that the L/R of each
> circuit should also be identical also so that the current rise graphs of
> both coils look the same.  This would seem to me to be the condition
> necessary for optimal energy transfer.  Is this true?  Maybe I have just
> missed reading about this so far.  Also I would venture that there is an
> optimal relationship to seek between the time constants and the operating
> frequency (peak to peak time) so one isn't "waiting" for the other.

The two time constants shall be as large as possible, to minimize the loss
of energy while the output voltage is "ringing up". An analysis shows that
for high Q systems, only the sum of the inverses of the two time constants, 
R1/L1+R2/L2, is significant.

Antonio Carlos M. de Queiroz