POWER CONVERTER

摘要

A 3 level PWM converter (3) comprises first to third fuses (F1R -F3R) which are connected, respectively, with a DC positive bus (13), a DC negative bus (14) and a DC neutral bus (15) at terminals on one side; first and second IGBT elements (Q1R, Q2R) connected between the other terminals of the first and second fuses (F1R, F2R) and an AC line (RL); AC switches (Q3R, Q4R, D3R, D4R) connected between the AC line (RL) and the other terminal of the third fuse (F3R); first and second diodes (D1R, D2R) connected in reverse parallel with the first and second IGBT elements (Q1R, Q2R), respectively; a first capacitor (C1R) connected between the other terminals of the first and third fuses (F1R, F3R); and a second capacitor (C2R) connected between the other terminals of the second and third fuses (F2R, F3R).