Power Conversion Apparatus

A power conversion apparatus comprising:

• an LLC resonant type DC/DC converter that changes a voltage of DC power from a power supply;
• an inverter that converts DC power from the DC/DC converter into AC power;
• a converter controller that controls the DC/DC converter;
• and
• an inverter controller that controls the inverter,
• wherein if an input voltage of the DC/DC converter is lower than a first voltage value that is set in advance, the converter controller maintains an output voltage of the DC/DC converter within a first voltage range that is set in advance by changing an operation frequency of switching of the DC/DC converter in compliance with the input voltage as a first voltage maintaining control, and
• wherein if the input voltage is higher than a second voltage value that is higher than the first voltage value, the converter controller maintains the output voltage within a second voltage range that is higher than the first voltage range by changing the operation frequency in compliance with the input voltage as a second voltage maintaining control.