Re: srsg behaviour - microsim

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

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Jeremy,

See the model at:

http://hot-streamer-dot-com/TeslaCoils/MyCoils/BigCoil/BigCoilSCH.gif

Even though it is a bit painful, I find it is best to really go ahead and 
put in a center tapped transformer.  There are tricks you can do to get 
around this but I find they just cause more trouble than they are 
worth.  Bet to model things as they really are.

But maybe you could put in two voltage sources around ground like I do for 
the OLTC (upper left):

http://hot-streamer-dot-com/temp/OLTC12-8.gif

I don't think there is any difference between the two grounds as far as 
MicroSim is concerned.  You could look in the manual:

http://hot-streamer-dot-com/TeslaCoils/Programs/pspcref.pdf

I took a quick look and did not see it mentioned.

BTW - Gary has a voltage controlled model at:

http://www.laushaus-dot-com/tesla/gapsim.htm

I think Dan was asking about this for streamer breakout.  Also note how 
Gary works the grounding.

Cheers,

         Terry


At 05:54 AM 12/9/2002 -0800, you wrote:

>What if the circuit I'm simulating has no
>'ground'
>
>(For example, the primary tank circuit
>and power supply of a tesla coil.)
>
>I thought I could get away with placing
>a VAC symbol, 15,000V, 60Hz, a coil, a
>capacitor and a voltage controlled switch.
>
>Since I now need a ground, do I have to go all the way
>and simulate the NST to include a center tapped
>secondary with the center tap being an earth ground?
>
>PS what's the difference between Earth and Analog
>grounds?
>
>-Jeremy