公开(公告)号：US12270832B2

公开(公告)日：2025-04-08

申请号：US17801413

申请日：2021-01-07

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jae Moon Lee ,  Tae Suk Bae

IPC: G01R1/20 ,  G01R31/327

Abstract: A device and a method for diagnosing a failure of an inverter initial charging circuit are provided. The device for diagnosing a failure of an initial charging circuit is advantageous as follows: it is possible to detect whether a relay of the initial charging circuit is malfunctioning or not by using a photocoupler connected in parallel with an initial charging resistor of the initial charging circuit, on the basis that, if a current flows through the initial charging resistor in a relay-on state, the photocoupler is turned on; and it is possible to prevent component failure or burnout from occurring due to a high current flowing through the initial charging resistor in the case of a relay failure.