Device for detecting phase loss of output in inverter

A device for detecting a phase loss in an output current in an inverter,

• wherein the inverter includes:
• an inverting module for converting a direct current (DC) link voltage to an alternate current (AC) voltage, wherein the inverting module includes three-phases legs, wherein each leg has lower and upper switching elements connected in series;
• and
• a shunt-resistor connected in series with a lower switching element of each leg of the inverting module,
• wherein the device includes:
• an output current detection unit for detecting two phases output currents from two signals output from two shunt-resistors connected to two phases legs respectively;
• an output current calculation unit for calculating an output current of one remaining phase using the detected two phases output currents;
• and
• an output phase loss detection unit configured for detecting an output phase loss when the calculated output current is within a current band corresponding to the output phase loss or when the calculated output current has a magnitude equal to and a sign opposite to one of the detected two phases output currents.