I was a little disappointed in the response to this thread and would like to not let the real objective go unrealized.
http://forum.allaboutcircuits.com/threads/urgent-help-needed.106530/
Here are the basics:
The op has seen a device that lets people run higher power devices on a lower power generator ie: a 1,000 watt electric skillet on a 650 watt generator. Now I think almost all of us have seen an electric skillet. You set it at 350 and it turns on until it gets to 350 then turns off. Once at temperature it may turn on for 5 seconds and be off for 10 or 15. His problem is/was that when it turns on it kills the generator because it cant supply the 1000 watts.
The circuit he posted, while not exact, looks like a triac dimmer. So if you think about it the voltage could easily be cut in half drawing only 500 watts from the generator, so it is happy. Now the skillet stays on for 10 seconds and off for 10 or 15. It may not be able to get to 550 anymore but it will still cook your eggs.
While it's true he thinks it boosts the power, it does not, but it does solve his problem.