公开(公告)号：US20250164534A1

公开(公告)日：2025-05-22

申请号：US18941971

申请日：2024-11-08

Applicant: POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION

Inventor： Suyong CHAE

IPC: G01R27/26 ,  G01R27/08

Abstract: Devices and methods for estimating impedance of an output element are described. According to one embodiment, a device for estimating impedance of an output element comprises a data acquisition circuit to acquire measurement data for currents and voltages of the output element connected to a common output node of a first converter module and a second converter module; and an impedance calculation circuit to calculate impedance of the output element using a component corresponding to a switching frequency of the first converter module and a component corresponding to a beat frequency, which corresponds to a difference between the switching frequency of the first converter module and a switching frequency of the second converter module, from current measurement values and voltage measurement values of the output element.