Title:
POWER CONVERSION DEVICE AND CONTROL METHOD FOR POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/089916
Kind Code:
A1
Abstract:
This power conversion device 101 comprises: a switching circuit RSC comprising switching elements Q1, Q2, a resonant capacitor Cr, and a transformer Tr that comprises a primary winding Tr1 connected in series to the resonant capacitor Cr; a gate driver circuit 2 that outputs a gate drive current to a gate terminal of each of the switching elements Q1, Q2 and controls the turning on and off of the switching elements Q1, Q2; a detection circuit 5 that detects a current I1 flowing through the switching circuit RSC; and a determination circuit 6 that determines a reversal of the polarity of the current detected by the detection circuit 5. The gate driver circuit 2 comprises a gate adjustment circuit that adjusts the gate drive current on the basis of determination results from the determination circuit 6.
Inventors:
WATANABE NAOKI (JP)
Application Number:
PCT/JP2022/033287
Publication Date:
May 25, 2023
Filing Date:
September 05, 2022
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H02M3/28
Domestic Patent References:
| WO2013114758A1 | 2013-08-08 |
Foreign References:
| JP2005198457A | 2005-07-21 | |||
| JP2014187787A | 2014-10-02 | |||
| JP2017038186A | 2017-02-16 |
Attorney, Agent or Firm:
TSUTSUI & ASSOCIATES (JP)
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