Title:
POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/163019
Kind Code:
A1
Abstract:
The present invention is provided with a plurality of driving circuits (103U, 103L) respectively driving a plurality of switching elements constituting an upper arm and a lower arm, a power supply circuit that supplies power to the plurality of driving circuits, and a discharge circuit for discharging a capacitor. The power supply circuit has a first transformer (201U) for the upper arm and a second transformer (201L) for the lower arm, in each of which a primary winding is connected in parallel to a DC power supply. Secondary windings of the first transformer and the second transformer supply power to the driving circuits and supplies power to a low-voltage circuit (110). Each of the first transformer and the second transformer has a feedback winding that outputs the voltage output to the driving circuit to a power supply control IC, and a discharge circuit (120) is driven by power supplied from the feedback winding.
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Inventors:
IKUYAMA TAKESHI (JP)
YAHATA KOICHI (JP)
HIDA SHINICHIROU (JP)
KATO YAWARA (JP)
YAHATA KOICHI (JP)
HIDA SHINICHIROU (JP)
KATO YAWARA (JP)
Application Number:
PCT/JP2021/036287
Publication Date:
August 04, 2022
Filing Date:
September 30, 2021
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
H02M7/48
Foreign References:
| JP2014033552A | 2014-02-20 | |||
| JP2013226050A | 2013-10-31 | |||
| JP2010284029A | 2010-12-16 | |||
| JP2016001960A | 2016-01-07 |
Attorney, Agent or Firm:
SUNNEXT INTERNATIONAL PATENT OFFICE (JP)
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