Title:
POWER CONVERSION DEVICE AND METHOD FOR ESTIMATING DC CURRENT OF POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/248363
Kind Code:
A1
Abstract:
This power conversion device comprises: an upper arm switching element and a lower arm switching element that are connected in series between a DC positive side terminal and a DC negative side terminal; an AC current detection unit that detects the AC current derived from the connection point between the upper arm switching element and the lower arm switching element; a switching element inter-terminal voltage detection unit that detects the inter-terminal voltage of either the upper arm switching element or the lower arm switching element and/or a mirror current detection unit that detects the mirror current flowing through a mirror element connected in parallel with each of the switching elements; and a DC current estimation unit that estimates the DC current flowing between the positive side terminal and the negative side terminal on the basis of the inter-terminal voltage and/or the mirror current, and the AC current.
Inventors:
NAKAZATO RYUTARO (JP)
HIDA SHINICHIROU (JP)
INADA RYOICHI (JP)
HIDA SHINICHIROU (JP)
INADA RYOICHI (JP)
Application Number:
PCT/JP2022/024779
Publication Date:
December 28, 2023
Filing Date:
June 21, 2022
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
H02M7/48
Domestic Patent References:
| WO2015004951A1 | 2015-01-15 |
Foreign References:
| JP2017208893A | 2017-11-24 | |||
| JP2022090317A | 2022-06-17 | |||
| JP2012244674A | 2012-12-10 |
Attorney, Agent or Firm:
SUNNEXT INTERNATIONAL PATENT OFFICE (JP)
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