Title:
SWITCHING POWER SUPPLY DEVICE PROVIDED WITH NOISE REDUCTION FUNCTION COMPONENT
Document Type and Number:
WIPO Patent Application WO/2023/189490
Kind Code:
A1
Abstract:
Provided is a small-sized power supply device that can reduce heat generation and power loss in a noise reduction function component and suppress EMI noise. A noise reduction function component (20) for a power supply device comprises: inductors (L21, L22) connected in series to a first current line connecting a first input terminal (P11) and a first output terminal (P21); a capacitor (C21); and a capacitor (C22). The capacitor (C22) is structurally a feedthrough capacitor having at least three terminals: a first terminal (T1); a second terminal (T2); and a third terminal (T3). The inductor (L21) and the capacitor (C21) form a first filter, while the inductor (L22) and the capacitor (C22) form a second filter. The first filter, the second filter, and a power conversion circuit 30 form a noise equilibrating circuit that offsets and equilibrates generation of a switching noise current in two or more frequency bands generated in a switching element.
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Inventors:
HOSOTANI TATSUYA (JP)
TAKATSUJI HIROYUKI (JP)
TAKATSUJI HIROYUKI (JP)
Application Number:
PCT/JP2023/009645
Publication Date:
October 05, 2023
Filing Date:
March 13, 2023
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H02M3/155; H03H7/01; H03H7/09
Domestic Patent References:
| WO2018021510A1 | 2018-02-01 |
Foreign References:
| JPH10201235A | 1998-07-31 | |||
| JP2006320130A | 2006-11-24 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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