Compared to the 2-level type, the LC filter can be made smaller thanks to its output waveform that is closer to a sine wave. Further, because of a switching loss as small as half that of the conventional type, it is advantageous for realizing a highly efficient design. It is suitable for photovoltaic power generation systems or uninterruptible power systems. Fuji Electric provides IGBT modules compatible with both T-type and I-type 3-level circuits. Particularly, Fuji Electric's uniquely developed RB-IGBT (Reverse Blocking) chip is used for an AC switch on T-type modules to realize a low switching loss.

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