Inverter control apparatus and air conditioner

An inverter control apparatus comprising:

• inverter circuits configured to convert direct current power into three-phase alternating current power, and to supply three-phase alternating current power to synchronous motors;
• current detection units configured to detect currents flowing through the inverter circuits;
• and
• an inverter control unit configured to determine and output voltage command values supplied to the synchronous motors based on the detected currents,
• wherein the inverter control unit includes
• an A/D conversion unit that converts the detected currents into digital data;
• a first inverter control unit that generates a first trigger which starts conversion in the A/D conversion unit, based on start timing information of the A/D conversion unit and a first carrier signal;
• a second inverter control unit that generates a second trigger which starts conversion of the A/D conversion unit, based on start timing information of the A/D conversion unit and a second carrier signal;
• and
• an A/D start factor selection unit that receives either the first trigger or the second trigger, and selects an A/D start factor in a predetermined period of an operation periods of the first carrier signal and the second carrier signal.