Variable capacity screw compressor and method
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United States of America Patent
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Mar 19, 2024
Grant Date -
Jul 20, 2023
app pub date -
Oct 31, 2022
filing date -
Jul 20, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A variable capacity screw compressor comprises a suction port, at least two screw rotors and a discharge port being configured in relation to a selected rotational speed that operates at least one screw rotor at an optimum peripheral velocity that is independent of a peripheral velocity of the at least one screw rotor at a synchronous motor rotational speed for a rated screw compressor capacity. A motor is configured to drive the at least one screw rotor at a rotational speed at a full-load capacity that is substantially greater than the synchronous motor rotational speed at the rated screw compressor capacity. A variable speed drive receives a command signal from a controller and generates a control signal that drives the motor at the selected rotational speed.
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