公开(公告)号：US20220196757A1

公开(公告)日：2022-06-23

申请号：US17602901

申请日：2020-04-07

Applicant: LS ELECTRIC CO., LTD.

Inventor： Chengde XU ,  Chun-Suk YANG

IPC: G01R31/52 ,  H02P27/08 ,  H02M7/5387 ,  G01R31/42 ,  G01R1/20

Abstract: 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.

公开(公告)号：US20220416687A1

公开(公告)日：2022-12-29

申请号：US17756868

申请日：2020-03-16

Applicant: LS ELECTRIC CO., LTD.

Inventor： Chengde XU

IPC: H02M7/5395 ,  H02M1/32 ,  H02M1/00

Abstract: 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.