Patent ID: 6210119
Filing Date: 2001-04-03
Classification: F04C

Abstract:
A system comprising:a power supply;a compressor and an electric motor for driving said compressor;a connector for connecting said power supply to said motor; anda control being provided with a signal indicative of at least one characteristic of a refrigerant passing through said compressor, and said control operable to make a determination of whether said compressor is running in reverse based upon said signal, said control also being able to generate an output signal when a determination is made that said compressor is running in reverse, said compressor being a scroll compressor, said power supply being a three-phase power supply, said output signal being sent to a phase reversal unit, said phase reversal unit being disposed between said power supply and said motor, said phase reversal unit reversing the phase of at least two of the three lines of said three-phase power supply to reverse the rotation direction of said motor back to a forward direction.