Re: Energy storage in primary?

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

Original poster: "Bert Hickman by way of Terry Fritz <teslalist-at-qwest-dot-net>" <bert.hickman-at-aquila-dot-net>

Jolyon,

Comments are interspersed...

Tesla list wrote:
>Original poster: "Jolyon Vater Cox by way of Terry Fritz 
><teslalist-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>
>
>----- Original Message -----
>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: <tesla-at-pupman-dot-com>
>Sent: Friday, January 31, 2003 2:59 PM
>Subject: Re: Energy storage in primary?
>
>  > Original poster: "Bert Hickman by way of Terry Fritz
><teslalist-at-qwest-dot-net>" <bert.hickman-at-aquila-dot-net>
>  > The quenching switch (SW2) should have the same low ON voltage as the main
>  > current interrupting switch (SW1). The sequence of operation would be to
>  > close SW1 and SW2
>Why is it necessary to close SW2 during the inductor charging period -when
>no energy is going into the capacitor?

It's not. However, it may be convenient.

>The capacitor begins charging the moment the astable goes low turns SW1
>off -triggering the mono to turn SW2 on.
>Is there likely to be a delay between SW1 opening and SW2 closing that would
>leave the capacitor disconnected from the primary for the short period
>before the mono turned SW2 on?
>If the latter is so, wouldn't and inverting stage (another 555 with pins 6
>and 2 tied together?) between the astable and the mono solve the problem?
>Jolyon

Since SW2 completes the primary LC loop, it MUST be closed before 
attempting to open SW1 to prevent overvolting SW1. SW2 can be closed at any 
time prior to opening SW1, and it can be before, simultaneous, or after 
closing SW1 as the capacitor is ALWAYS in the primary circuit prior to 
opening SW1. Closing SW1 and SW2 simultaneously simply avoids the 
possibility of SW2 being open while trying to open SW1... BOOM!

Best regards,

-- Bert --
-- 
Bert Hickman
"Electromagically" (TM) Shrunken Coins
Stoneridge Engineering's Teslamania
http://www.teslamania-dot-com