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"The variable-frequency drive uses a rectifier to convert the incoming alternating current (AC) to direct current (DC) and then uses pulse-width modulation in an electrical inverter to produce AC of a desired frequency. The variable frequency AC drives a brushless motor or an induction motor. As the speed of an induction motor is proportional to the frequency of the AC, the compressor can now run at different speeds."
I see, so you would put the DC into where it would have been created in the original inverter. I've never heard of these, been out of that business about 20 years. Then the DC is converted to AC to run the motor at various speeds, that drives the compressor...mechanically. It sure seems like a lot of convertin goin on, to drive a mechanical compressor. Small DC motor running the compressor slowly at stop, and driveline drive when moving with a mechanical variable speed drive. Hmmm....?
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