Title:
POWER CONVERSION DEVICE, AND POWER CONVERSION METHOD
Document Type and Number:
WIPO Patent Application WO/2024/053303
Kind Code:
A1
Abstract:
According to he present invention, when an abnormality occurs in a power conversion device using a power semiconductor element having one or more gates, in order to quickly stop the switching of the power semiconductor element without adversely affecting the device lifetime, the power conversion device is constituted by the power semiconductor element and controls the power supplied to a load by operating the switching of the power semiconductor element by gate commands. The power conversion device comprises: a control logic unit that generates PWM commands for switching the power semiconductor element having one or more gate control terminals; and a gate drive unit that generates the gate commands by delaying the PWM commands by a predetermined time. The control logic unit observes the pulse states of the PWM commands when receiving a detection signal indicating an abnormality in the power conversion device and superimposes a pulse signal as an emergency stop command on the PWM commands at a timing that satisfies the minimum on-time specified in the use conditions of the power semiconductor element. The gate drive unit turns off the gate commands to the one or more gate control terminals on the basis of the PWM commands on which the emergency stop command is superimposed.
Inventors:
KURIHARA NAOKI (JP)
OTSUKA KUNIAKI (JP)
OTSUKA KUNIAKI (JP)
Application Number:
PCT/JP2023/028538
Publication Date:
March 14, 2024
Filing Date:
August 04, 2023
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H02M7/48
Foreign References:
| JP2019161720A | 2019-09-19 | |||
| JP2015204723A | 2015-11-16 | |||
| JPH06125256A | 1994-05-06 | |||
| JP2017028811A | 2017-02-02 | |||
| JP2009201311A | 2009-09-03 |
Attorney, Agent or Firm:
DAI-ICHI INTERNATIONAL PATENT OFFICE, P.C. (JP)
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