公开(公告)号：US20250167685A1

公开(公告)日：2025-05-22

申请号：US18839879

申请日：2023-02-16

Applicant: LS ELECTRIC CO., LTD.

Inventor： Kwang Kyu HWANG ,  Jae Ho LEE ,  Jeong Woo LIM

IPC: H02M3/335 ,  H02M1/00

Abstract: The present disclosure provides a power supply device for supplying, using a DC link voltage of a high-voltage unit of a semiconductor transformer, a control power to a transformer control unit for controlling the high-voltage unit, the power supply device comprising: a converter unit which includes a transformer unit and a switch connected in series to a primary side of the transformer unit, is connected to a DC link of the high-voltage unit, and is configured to convert the DC link voltage and output the converted DC link voltage to a transformer control unit; and a converter control unit configured to control on/off of the switch to convert the DC link voltage, wherein the converter unit comprises a first to a (n+1)th converter (wherein, n is an integer greater than or equal to 1) connected in series.