Re: An SSTC simulation

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

Original poster: Kchdlh-at-aol-dot-com 

Hmmm...I don't know if the switching-times would relate to whether or not 
self-tuning is incorporated.  I do note this in the simulation:

1.  The time between when "transistor" (S1 or S2) current starts to rise 
and its voltage reaches minimum is ~300 us.

2.  The current starts to rise at a voltage level of 135 V across the 
"transistor".

3.  The voltage reaches minimum (about 10 V) at a current of ~130 A (for 
all the 'transistors" in parallel--however many).

Clearly the 300 us should be improved in real hardware, as should be the 
turn-off, which is substantially worse--about 1.1 us.

Ken

n a message dated 11/9/03 6:51:29 AM Pacific Standard Time, 
tesla-at-pupman-dot-com writes:


>Subj:Re: An SSTC simulation
>Date:11/9/03 6:51:29 AM Pacific Standard Time
>From:<mailto:tesla-at-pupman-dot-com>tesla-at-pupman-dot-com
>To:<mailto:tesla-at-pupman-dot-com>tesla-at-pupman-dot-com
>Sent from the Internet
>
>
>
>Original poster: "Dan Strother" <dstroth-at-hotmail-dot-com>
>
>Ah, very interesting. The circuit and concept look great, but there is one
>thing bothering me: Won't dynamically tuning to the secondary coil cause
>the MOSFETs to dangerously hard-switch a lot of current in the primary 
>circuit?
>
>
>Dan Strother
>
>
>
> >Original poster: Kchdlh-at-aol-dot-com
> >
> >Fundamentally, yes: series-resonant primary, parallel-resonant secondary.
> >But my scheme a) uses resonant storage-capacitor charging while Jimmy's
> >does not and b) incorporates "dynamic" control of the tuning.  Also, I
> >don't believe Jimmy's storage capacitors are necessarily fully discharged
> >every mains cycle.  So perhaps they'd last a whole lot longer!
> >
> >In regard to my amplifying circuit, I'd like to point out something I just
> >realized.  There's no need to have the U1 EX-OR in the circuit: regardless
> >of the phasing between primary and secondary, feedback will be positive
> >during one of the two mains half-cycles; doesn't matter which one.
> >
> >Just slap any old secondary onto it and it will take off!
> >
> >Ken
> >
>