Title:
電力変換装置及び空調機
Document Type and Number:
Japanese Patent JP7341361
Kind Code:
B2
Abstract:
A power converter includes a power converting module and a gate drive circuit that includes first and second drive circuits and a power supply module including a limiting resistor, a bootstrap diode, and a bootstrap capacitor, and configured to generate a voltage to be supplied to the second drive circuit. The bootstrap capacitor is charged when a switching element connected to a reference potential side performs switching. A charging period of the bootstrap capacitor includes at least first and second periods. In the first period, the switching element is driven by a pulse signal having a first pulse width. In the second period, the switching element is driven by a pulse signal having a second pulse width greater than the first one. The first pulse width in the first period is determined based on an allowable magnitude of a voltage drop of the control power supply in the first period.
Inventors:
Kenta Yuasa
Noritsugu Iwasaki
Yoshikazu Tsukano
Noritsugu Iwasaki
Yoshikazu Tsukano
Application Number:
JP2022579231A
Publication Date:
September 08, 2023
Filing Date:
February 04, 2021
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02M7/48
Domestic Patent References:
| JP2012196065A | ||||
| JP11206178A | ||||
| JP201770056A |
Attorney, Agent or Firm:
Patent Attorney Corporation Kisa Patent and Trademark Office