A converter device, connected between an AC source and a load for converting AC power from the AC source into DC power and outputting the DC power, comprising: a rectification means that converts the AC power input from the AC source into the DC power; a smoothing means that is connected to a DC output side of the rectification means in parallel with the rectification means; two switching circuits that are provided in parallel with each other in between the rectification means and the smoothing means; and a control means configured to control the switching circuits, wherein each of the switching circuits includes: an inductive element that is serially provided in a positive electrode bus line which connects the rectification means and the smoothing means; and a switching means that is connected to a current output side of the inductive element in parallel with the rectification means, and the control means includes: a reference waveform generation means configured to generate a reference waveform of a predetermined carrier frequency; a voltage command generation means configured to generate a voltage command; a first signal generation means configured to compare the reference waveform with the voltage command so as to generate a first switching signal for one switching circuit; and a second signal generation means configured to compare an inverted reference waveform having a phase deviated by 180 degrees from a phase of the reference waveform, with the voltage command so as to generate a second switching signal for the other switching circuit, characterised in that in rated load operation, the carrier frequency is set to be closer to a lower limit than an upper limit within a range from the lower limit to the upper limit, the lower limit being a switching frequency satisfying a harmonic regulation value, the upper limit being a switching frequency satisfying a noise regulation value. a rectification means that converts the AC power input from the AC source into the DC power; a smoothing means that is connected to a DC output side of the rectification means in parallel with the rectification means; two switching circuits that are provided in parallel with each other in between the rectification means and the smoothing means; and a control means configured to control the switching circuits, wherein an inductive element that is serially provided in a positive electrode bus line which connects the rectification means and the smoothing means; and a switching means that is connected to a current output side of the inductive element in parallel with the rectification means, and a reference waveform generation means configured to generate a reference waveform of a predetermined carrier frequency; a voltage command generation means configured to generate a voltage command; a first signal generation means configured to compare the reference waveform with the voltage command so as to generate a first switching signal for one switching circuit; and a second signal generation means configured to compare an inverted reference waveform having a phase deviated by 180 degrees from a phase of the reference waveform, with the voltage command so as to generate a second switching signal for the other switching circuit, characterised in that