Patent ID: 8708662

Claim:
A linear compressor, comprising: a fixed member having a compression space therein; a movable member linearly reciprocated in the fixed member to compress a refrigerant sucked into the compression space; one or more springs provided to elastically support the movable member in a motion direction of the movable member; a motor unit including a motor connected to the movable member to linearly reciprocate the movable member in an axial direction and a capacitor connected in series to the motor; and a motor control unit controlling an AC voltage applied to the motor to adjust a variable rate of a cooling capacity by the reciprocation of the movable member, wherein the motor control unit comprises: a rectification unit receiving AC power and outputting a DC voltage; an inverter unit receiving the DC voltage, converting the DC voltage to an AC voltage according to a control signal, and supplying the AC voltage to the motor unit; a current sensing unit sensing a current flowing through the motor unit; and a control unit integrating the current from the current sensing unit, calculating an attenuation voltage by multiplying the integrated value by a constant 1/Cr, wherein Cr is a capacitance, generating the control signal for producing the AC voltage corresponding to a difference between a set voltage and the attenuation voltage, and applying the control signal to the inverter unit.