| 摘要 |
PROBLEM TO BE SOLVED: To provide a power conversion device that is able to hinder occurrence of noise in a band lower than AM band.SOLUTION: An electric power conversion device 10 including a switching element has a plurality of switching circuits 21, 22 that separately carry out switching and are connected in parallel. One or more switching circuits 22 out of the plurality of switching circuits 21, 22 have modulation control means 22b that exerts control so as to shift the phase of a predetermined modulation pattern. In this configuration, even if noise of a band lower than AM band occurs due to the switching of a certain switching circuit 21, switching is carried out in another switching circuit 22 in a predetermined modulation pattern in which a phase is shifted so as to muffle by combining with the waveform of the noise. Accordingly, occurrence of noise in a band lower than AM band can be hindered. Also, hindering occurrence of noise enables simplified filter circuit 30 and a cost reduction. |
