People ask me "Can I make money building 3 phase converters?" Yes you can here is an example of a homemade transformer running a 5 hp motor at 460 volts from 240 supply lines. We have even experimented with oil cooling the transformer to save on copper. The transformer you see here has taps and can also run a 10 hp motor at 240 volts. You can set up shop and custom build these for people.
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