SCREW COMPRESSOR DRIVE CONTROL

摘要

An embodiment of method used to control operation of a screw compressor of a refrigeration system may include receiving status signals regarding operation of the screw compressor of the refrigeration system. The method may further include determining an operating point of the screw compressor based upon the received status signals, and selecting a torque profile for the screw compressor based upon the operating point. The method may also include driving the screw compressor per the selected torque profile. Refrigeration systems and compressor systems suitable for implementing the method are also presented.

主权项

1. A compressor system comprising
a screw compressor comprising a suction port to receive fluid at a suction pressure, a plurality of meshing screw rotors to compress the fluid, and a discharge port to discharge the compressed fluid at a discharge pressure that is higher than the suction pressure; an electric motor to receive control signals and to drive the plurality of meshing screw rotors at a speed per the received control signals; a controller to receive status signals indicative of an operating point of the screw compressor, to select a torque profile for the screw compressor based upon the operating point of the screw compressor, and to generate command signals that requests the electric motor be driven per the selected torque profile; and a variable frequency drive to receive the command signals and to generate the control signals that drive the electric motor per the selected torque profile.