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See, i thought it sounded simple...
I personally would lean more towards generating a constant high frequency sine wave on the input side, then rectifying the output side and running it through high voltage IGBT's. This way, you get the high efficiency of the step up and you're not trying to run a 1hz wave through the transformer when the motor is just starting to creep.
What about the comparison between a transformer and boost converter? It strikes me that a transformer would be more efficient (no switching losses, etc)... but I'm not sure.
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