Title:
GATE DRIVE CIRCUIT AND POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/158052
Kind Code:
A1
Abstract:
A gate drive circuit according to the present invention controls a gate voltage applied to a gate terminal of a switching element to drive the switching element, and comprises an overcurrent detection circuit that detects an overcurrent state on the basis of the value of a current flowing through the switching element. The overcurrent detection circuit receives input of a monitor voltage of a power supply line connected to the switching element to supply power to the switching element. The overcurrent detection circuit detects the same being in the overvoltage state when the monitor voltage is equal to or larger than a predetermined threshold value.
Inventors:
BUI TRONG TAO (JP)
YAHATA KOICHI (JP)
YAHATA KOICHI (JP)
Application Number:
PCT/JP2021/036358
Publication Date:
July 28, 2022
Filing Date:
September 30, 2021
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
H02M1/00; H02M1/08; H02M3/155; H02M7/48
Domestic Patent References:
| WO2019187544A1 | 2019-10-03 |
Foreign References:
| JPS59132385U | 1984-09-05 | |||
| JP2017028778A | 2017-02-02 | |||
| US20140085947A1 | 2014-03-27 |
Attorney, Agent or Firm:
SUNNEXT INTERNATIONAL PATENT OFFICE (JP)
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