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Correction
I should be paying more attention
The input stage of the VFD is normally 6 diodes and takes the 3 phase input and generates a pretty stable DC output with a smaller AC wave 'on top' of it.
This VFD, for some reason, uses something else. There are three sets of input semiconductors, but they don't look like the output transistors. They definitely have control signals going to them.
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