Title:
HIGH-FREQUENCY POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/235849
Kind Code:
A1
Abstract:
The line length (WL1) between the input end of a switching circuit (2) and a high-frequency capacitor (C1) is shorter than the line length (WL2) between the output end of a DC power supply (1) and the high-frequency capacitor (C1). Among a plurality of current paths through which switching currents flow due to the switching of the switching circuit (2), the path of the current flowing through the switching circuit (2) and the high-frequency capacitor (C1) is shorter than the other current paths. In addition, the high-frequency capacitor (C1) suppresses harmonic current included in the output current of a high-frequency power generation circuit (3) in such a way that the proportion of time during which the voltage across both ends of a high-side switching element (Q2) changes due to the switching operation of the high-side switching element (Q2) is made equal to the proportion of time during which the voltage across both ends of a low-side switching element (Q1) changes due to the switching operation of the low-side switching element (Q1).
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Inventors:
HOSOTANI TATSUYA (JP)
Application Number:
PCT/JP2018/023400
Publication Date:
December 27, 2018
Filing Date:
June 20, 2018
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H02M7/48; H02J7/00; H02J50/12; H02M1/44; H02M3/28
Foreign References:
| JPH1127959A | 1999-01-29 | |||
| JP2013222950A | 2013-10-28 | |||
| JP2000082630A | 2000-03-21 | |||
| JP2010272591A | 2010-12-02 |
Attorney, Agent or Firm:
KAEDE PATENT ATTORNEYS' OFFICE (JP)
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