Abstract: Provided are a system and method of managing electric power equipment having a biometric information recognition function, for preventing the risk of an accident by installing an examination unit for directly examining and checking important checklist items along with a biometric information recognition unit for recognizing biometric information of a safety manager, in the electric power equipment, in order to periodically manage the electric power equipment.

Abstract: A wireless charger for an electric vehicle includes a feeder module supplying power by approaching a location of a collector module in the vehicle and a robot arm aligning a location of the feeder module according to the location of the collector module. A feeder inverter converts externally applied power and supplies the converted power to the feeder module. The wireless charger simplifies charging in various ways. The user does not need to connect to a charger each time a vehicle is to be charged. Since the user does not directly touch a charging connector in case rain, safety accidents can be prevented. A robot arm can transfer a feeder module according to a location of a vehicle parked within a charging station further enhancing convenience. Furthermore, a collector module installed in a vehicle is sensed and a feeder module is aligned according to a location of the sensed module.

Abstract: There is disclosed a large scale energy storage system enabling balanced control of inverters, the large scale energy storage system including an inverter controller comprising a PWM generation circuit configured to generate a reference PWM signal and a first O/E converter configured to convert the reference PWM signal transmitted from the PWM generation circuit into an optical signal and to output the optical signal, and a plurality of PCS inverters configured to output a grid voltage, each of the PCS inverters comprising a second O/E converter embedded therein to convert the PWM signal and the optical signal output from the inverter controller into an optical signal and a plurality of inverter modules.

Abstract: There is disclosed a large scale energy storage system enabling balanced control of inverters, the large scale energy storage system including an inverter controller comprising a PWM generation circuit configured to generate a reference PWM signal and a first O/E converter configured to convert the reference PWM signal transmitted from the PWM generation circuit into an optical signal and to output the optical signal, and a plurality of PCS inverters configured to output a grid voltage, each of the PCS inverters comprising a second O/E converter embedded therein to convert the PWM signal and the optical signal output from the inverter controller into an optical signal and a plurality of inverter modules.