公开(公告)号：US20250007387A1

公开(公告)日：2025-01-02

申请号：US18711196

申请日：2022-11-18

Applicant: LG INNOTEK CO., LTD.

Inventor： Seung Min LEE ,  Dong Keun YOON ,  Seong Jae JANG

IPC: H02M1/10 ,  H02J3/32 ,  H02J7/35 ,  H02S40/30

Abstract: The present invention relates to an auxiliary power supply device for generating auxiliary power of a power conversion device, the auxiliary power supply device comprising: a first auxiliary power supply unit which receives power applied from a photovoltaic module and generates auxiliary power therefrom; a second auxiliary power supply unit which receives power applied from a grid and generates auxiliary power therefrom; and a driving unit which can selectively drive the second auxiliary power supply unit according to the magnitude of voltage of the photovoltaic module. Accordingly, the present invention has an advantage in that an auxiliary power supply can be normally operated even in an environment where photovoltaic power generation is not performed.