Inverter device, inverter, power generation system, and methods of controlling the inverter device

摘要

Task: To provide a technique which relates to an inverter device whose conversion rate is even higher, and by which an even more ideal output waveform can be obtained. Means for Solving: There are a full-bridge inverter part that converts DC power into AC power, and a short-circuit part that increases the conversion efficiency by short-circuiting the output of the full-bridge inverter part, with the PWM control being controlled by a plurality of switching patterns including switching patterns PWM control of the short-circuit part, and switch patterns, which make no PWM control of the short-circuit part include. Depending on the switching pattern, a dead time for preventing a current source short circuit is established, and in the case of establishing this dead time, the duty ratio of the PWM control is corrected and the distortion of the output waveform is corrected by the dead time.