STROKE SHAKING DETECTION APPARATUS AND METHOD FOR LINEAR COMPRESSOR

摘要

PURPOSE: A device and method for detecting trembling of stroke of linear compressor are provided to prevent wrong operation due to mistaking voltage fluctuation or noise for stroke trembling by detecting stroke trembling with changing amount of phase difference of stroke and current. CONSTITUTION: A device comprises a linear compressor(200); a stroke voltage/current detective part(300); a stroke voltage/current phase difference detective part(400); a phase difference changing amount calculating part(500); a stroke trembling detective part(600); and a stroke controller(100). The phase difference changing amount calculating part repeatedly subtracts previously detected phase difference of stroke voltage/current from the phase difference of stroke voltage/current detected by the stroke voltage/current phase difference detective part to calculate a plurality of changing amounts of phase difference. The stroke trembling detective part receives a plurality of the changing amounts of phase difference from the phase difference changing amount calculating part to compare with fixed value to detect stroke trembling thereby. The stroke controller controls operation of the linear compressor by stroke commanding value and receives stroke trembling detective signal from the stroke trembling detective part to change stroke voltage by strength of the intended cooling performance to control the operation of the linear compressor.