Patent ID: 8109736

Claim:
An apparatus for controlling an operation of a linear compressor, comprising: a controlling unit for detecting a phase difference between a current and a stroke, and outputting a frequency varying signal or a phase difference inflection point detecting signal based on the phase difference; a phase difference inflection point detecting unit for judging whether to detect a phase difference inflection point or not by the phase difference inflection point detecting signal, and outputting a stroke command value controlling signal based on a result of the judgment; a stroke command value determining unit for determining a stroke command value based on the stroke command value controlling signal; and a pulse width modulation (PWM) signal generating unit for generating a PWM signal based on a difference between the stroke command value and the stroke, or generating a PWM signal based on the frequency varying signal, wherein the PWM signal generating unit analyzes the frequency varying signal, and generates the PWM signal to increase a frequency when the phase difference is more than a first preset range as a result of the analysis.