Lsis Co., Ltd.

Ls Electric Co., Ltd.

Chengde Xu

Chun-Suk Yang

An apparatus and a method for controlling an inverter are disclosed. A method, according to one embodiment of the present disclosure, receives an operation command for an inverter, outputs a first PWM control signal, to an inverter unit, such that the inverter unit outputs at least one among a plurality of valid vectors for the diagnosis of a short circuit of the output of the inverter, and blocks the output of the inverter if a short circuit current of the inverter is detected.

Apparatus and method for controlling inverter

The present disclosure relates to an inverter system capable of detecting an output ground fault and an output ground fault detection method using same and, particularly, to an inverter for detecting an output ground fault by detecting the current of a leg-shunt resistor, and an inverter output ground detection fault method using same. The present disclosure compares absolute peak values of 3-phase current AD raw values detected from a shunt resistor, and thus may reliably detect the output ground fault of an inverter.

Inverter system capable of detecting output ground fault and output ground fault detection method using same

Disclosed is a device for detecting a phase loss in an output current in an inverter. 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.

Device for detecting phase loss of output in inverter

Disclosed is a device for detecting an output current of an inverter. The device for detecting an output current of an inverter according to the present disclosure includes a shunt resistor connected to an output end of a capacitor of a direct current (DC) link; a detector connected to the shunt resistor and configured to detect the output current; and a controller configured to control a sampling timing of a current in the detector.

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Anyang-si, South Korea

Chengde Xu