Inverter device

An inverter device comprising:

• a three-phase inverter, wherein each phase includes a switching element on a high potential side and a switching element on a low potential side;
• and
• a controller programmed to perform two-phase modulation control on switching of the switching elements between an ON state and an OFF state, wherein
• the controller is programmed to compute a power factor of a load,
• the controller is programmed to determine whether the computed power factor is less than a preset threshold value,
• if the controller determines that the computed power factor is greater than or equal to the threshold value, the controller performs a phase shift to shift a central time point of an ON period or an OFF period for two phases other than a stop phase in the two-phase modulation control by 180 degrees, and
• if the controller determines that the computed power factor is less than the threshold value, the controller supplies the switching elements with ON and OFF control commands to perform the two-phase modulation control without performing the phase shift.