Patent ID: 8963454
Filing Date: 2015-02-24
Classification: F04B,F25B,H03F

Abstract:
1. An apparatus for controlling a linear compressor, the apparatus comprising: an alternating current (AC) switch configured to be connected to a power source; a current detector configured to detect a driving current applied to the linear compressor; a voltage detector configured to detect a driving voltage applied to the linear compressor; a stroke calculator configured to calculate a stroke based on the detected current and the detected voltage; a controller configured to generate a gate driving signal, wherein the AC switch is configured to open and close a connection to the linear compressor based on the gate driving signal, and wherein the gate driving signal is generated based on the calculated stoke; and an insulating circuit configured to insulate an analogue ground of an analogue circuit driven by the power source from a digital ground of a digital circuit comprising the controller, wherein the digital circuit is driven by a voltage that has been converted from the power source, wherein the current detector includes a differential amplifier having an input resistance such that the power source is prevented from interfering with the controller when the analogue ground is electrically connected to the digital ground.