Title:
POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/179064
Kind Code:
A1
Abstract:
This power conversion device is provided with: a voltage detection means for detecting a common-mode voltage generated during a switching operation of a power semiconductor element; a voltage superposition means for superposing the common-mode voltage detected by the voltage detection means on an output of the power conversion device to cancel the common-mode voltage in a frequency equal to or higher than a switching frequency generated during the switching operation of the power semiconductor element; and a residual voltage detection means for detecting the common-mode voltage of the power conversion device superposed by the voltage superposition means. The voltage superposition means includes a feedback means for adding the common-mode voltage detected by the residual voltage detection means and superposing the added result on the output of the power conversion device. The voltage detection means comprises a first choke coil and a first capacitor.
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Inventors:
YAMAMOTO YUSHIN (JP)
OGASAWARA SATOSHI (JP)
OHARA SHUNSUKE (JP)
OGASAWARA SATOSHI (JP)
OHARA SHUNSUKE (JP)
Application Number:
PCT/JP2019/009163
Publication Date:
September 10, 2020
Filing Date:
March 07, 2019
Export Citation:
Assignee:
TOSHIBA MITSUBISHI ELEC IND (JP)
UNIV HOKKAIDO NAT UNIV CORP (JP)
UNIV HOKKAIDO NAT UNIV CORP (JP)
International Classes:
H02M7/48
Domestic Patent References:
| WO2017077939A1 | 2017-05-11 |
Foreign References:
| JP2001268922A | 2001-09-28 | |||
| JP2008236817A | 2008-10-02 | |||
| JP2011223667A | 2011-11-04 | |||
| JP2001268922A | 2001-09-28 |
Other References:
See also references of EP 3937364A4
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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