POWER SUPPLY CIRCUIT OF FREEZER AND METHOD OF CONTROLLING POWER SUPPLY CIRCUIT OF FREEZER

摘要

PROBLEM TO BE SOLVED: To provide a power supply circuit capable of efficiently reducing a harmonic current even if an input current fluctuates, and to provide a method of controlling the power supply circuit. SOLUTION: A plurality of combinations of data consisting of phase control amounts corresponding to an input current and an output current are set in a setting section (6a). A calculating section (6b) calculates a phase control amountΔt corresponding to the input current (IL) on the basis of the plurality of combinations of data set in the setting section (6a). A phase control section (6) shifts the phase of a PAM (phase amplitude modulation) waveform by the phase control amountΔt. COPYRIGHT: (C)2009,JPO&INPIT