Patent ID: 6685438
Filing Date: 2004-02-03
Classification: F04B

Abstract:
An apparatus for controlling operation of a compressor, comprising:a detecting means for detecting a current applied to a compressor and a piston speed of the compressor; a phase difference comparing means for comparing phases of the current and the speed and outputting a phase difference; an operation frequency determining means for determining a frequency at a certain time point as an operation frequency by increasing/decreasing a reference operation frequency by a certain frequency units according to the phase difference; a speed reference value determining means for determining a speed reference value according to the operation frequency outputted from the operation frequency determining means; and a control means for comparing the speed reference value with the speed detected by the detecting means, applying a control signal according to the comparison result to the compressor and varying an operation frequency of the compressor according to the operation frequency determined by the operation frequency determining means.