Linear compressor and control apparatus thereof

It discloses a linear compressor and a control device. The linear compressor according to the present invention and its control device it is an object to the frequency of the drive current supplied to the drive motor so as to follow the resonance frequency which changes in response to a load fluctuation in real time to for maximum efficiency of the linear compressor. The linear compressor according to the present invention the object, includes a piston which reciprocates by the drive motor and the drive motor. The control unit has a phase difference of 90˚ for the displacement waveform of the piston generates a frequency the same reference current, and controls the drive current by the driving current supplied to the synchronous motor driving the reference current so as to follow the resonance frequency of the piston .