公开(公告)号：US20220034949A1

公开(公告)日：2022-02-03

申请号：US17443998

申请日：2021-07-29

Applicant: KABUSHIKI KAISHA YASKAWA DENKI

Inventor： Kentaro INOMATA ,  Noor Aamir BALOCH ,  Tokuma NAKAMICHI ,  Hengbin RUI

IPC: G01R21/14 ,  G01R21/06 ,  G01K7/22 ,  H02P27/08

Abstract: A power conversion device includes a power conversion circuit including a temperature sensor configured to detect a temperature at a sensor position and a switch configured to switch a connection on and off at a switch position separated from the sensor position; a loss calculation processing circuitry configured to calculate a power loss in the switch; a loss correction processing circuitry configured to correct a calculation result of the power loss on the basis of a detection result of the temperature at the sensor position; a temperature correction processing circuitry configured to correct the detection result of the temperature on the basis of the calculation result of the power loss; and a temperature estimation processing circuitry configured to estimate a temperature at the switch position on the basis of a corrected calculation result of the power loss and a corrected detection result of the temperature.