Why not use a PWM either mirrored drive to switching FETs or a single
ended bank of high power switching FETS. Then the transformer will do
the integration.

Vern

Ray Gallant wrote:
>
> I would like to build a mostly sinusoidal power inverter for my home forced air heating system now PIC controlled. The application is similar to a UPS where the load is an 115VAC motor and a few other small 115VAC loads. Available DC source will be 1 or more 12 volts batteries similar to a car or marine high duty for now. A PIC is involved for LCD, keypad, Mains AC monitor, alarm, RS232 and other application but not directly for the inverter yet. At this point, I have developed a sinusoidal 24VAC p-p 60Hz with zero DC offset from a matched pair of transistors (push/pull) and an ICL IC. Things OK up to here! Now I need to increase this to 115VAC at about 5 amps or more for a while. I was looking at a Powerex transistor http://www.pwrx.com/pwrx/docs/kd224503.pdf   Should I use a 24:115 transformer and amplify from there? I have difficulty with the power stage, snubber and such. I have large thyristors available if required. Any feedback is much appreciated. Thanks {slewrate}
>
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