Hello Chris,

It is possible to build one using a pic to generate the phases, run the
phases at high frequency to drive a triple set of D/A outputs, filter
well and use 3 power amplifiers to drive 3 transformers in a step up
mode. Adjust the analog signals until the output voltages are matched at
the three transformer outputs. Connect the three transformers in a delta
or y configuration to match the mains you will be simulating. Use
something like a LM3886 as the power amplifiers to simple 12 Volt
step-down transformers. Connect the 12 volt winding to the output of the
power amplifier.

This can also be simulated with a simple 3 bit counter with the outputs
taken through an additional flip-flop to generate the three phases, then
opamp low pass filter them power amp to transformers. Adjust the drive
frequency to the 3 bit counter to your simulated mains frequency, adjust
the gain for the desired mains voltage...

Vern



Chris Loiacono wrote:
>
> Does anyone know of reasonably priced simulation tool that will let me
> measure time and voltage relationships in 3-phase 6 SCR phase angle
> controlled circuits?
> Life would be so much simpler for me with something that would let me see
> SCR voltages at various firing angles.....
>
> TIA,
> Chris
>
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