Patent ID: 6388905
Filing Date: 2002-05-14
Classification: H02M,Y02B

Abstract:
A single-phase AC-DC converter comprising: a PFC power supply section, where a rectified current obtained by rectifying an electric current from an AC supply is switched; a DC-DC power supply section, where a direct current obtained by rectifying and smoothing an electric current from an AC supply is switched; a first switching means for conducting a switching operation in said PFC power supply section; a second switching means for conducting a switching operation in said DC-DC power supply section; a drive pulse generating circuit for generating first drive pulses for driving said first switching means and second drive pulses for driving said second switching means; and a servo loop for controlling said drive pulse generating circuit; wherein said servo loop is constituted of only one serve loop; and wherein said converter comprises a duty ratio controlling means for making a duty ratio of said drive pulses for driving said first switching means and a duty ratio of said drive pulses for driving said second switching means different from each other in a linked manner.