公开(公告)号：US11418104B2

公开(公告)日：2022-08-16

申请号：US17761589

申请日：2020-10-23

Applicant: KOOKMIN UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATION

Inventor： Geun Ho Lee ,  Jae Yeob Hwang ,  Hee Sun Lim ,  Dong Gil Kang ,  Dong Ok Kim

IPC: H02M1/00 ,  H02M7/5395 ,  G01K7/16 ,  G01R19/10

Abstract: Disclosed are a current measurement method for a three-phase pulse width modulation inverter using a real-time switch junction temperature estimation technique, and a three-phase pulse width modulation inverter system. The current measurement method may comprise the steps of: calculating a power loss of a switch of an inverter; estimating the junction temperature (T j) of the switch by using a thermal equivalent circuit; estimating a resistance (R ds on) value between both ends of a drain and a source by using a resistance (R ds on) map based on the junction temperature (T j); and using, as a control signal of the inverter, a current value calculated based on the estimated resistance (R ds on) value.