Method and device for power factor compensation in inverter airconditioner

摘要

PURPOSE: A method and a device for compensating a power factor of an inverter air conditioner are provided to prevent a stopped state of a compressor caused by abnormal current rise by variably controlling the partial switching-on time according to the loading conditions. CONSTITUTION: A device for compensating a power factor of an inverter air conditioner comprises a loading amount-detecting unit detecting the current loading amount of the system; a desired switch on time-varying unit comparing the current loading amount detected from the loading amount-detecting unit with the standard loading amount and outputting a desired switch on time by applying the compared value to the standard switch on time; a reactor(52) passing just specific frequency in input commercial alternating current power; a power factor compensation unit executing switching action of one time during the desired switch on time set from the varying unit at every zero crossing point of the input voltage, to compensate the power factor of power passing through the reactor; a DC voltage production unit(58) inputting the power output from the power factor compensation unit and producing a DC voltage of predetermined capacity; and an inverter unit(60) inverting the output voltage of the DC voltage and supplying the output voltage to a compressor(62).