Title:
POWER CONVERSION DEVICE AND POWER CONVERSION METHOD
Document Type and Number:
WIPO Patent Application WO/2017/163320
Kind Code:
A1
Abstract:
Provided is a power conversion device for accurately calculating the phase even when noise is mixed in a detected or estimated electric signal. The power conversion device is provided with: a linear function conversion unit for converting a detected or estimated electric signal to a linear function representing a time displacement of the phase of the electric signal; a slope extraction unit and an intercept extraction unit for extracting a slope and an intercept from the linear function obtained by conversion by the linear function conversion unit; a slope filter processing unit and an intercept filter processing unit for performing filter processing on the slope and the intercept extracted by the slope extraction unit and the intercept extraction unit; a linear function reverse conversion unit for regaining a linear function using the slope and the intercept on which the filter processing has been performed by the slope filter processing unit and the intercept filter processing unit; and a phase reverse conversion unit for reversely converting the linear function reversely converted by the linear function reverse conversion unit to a time displacement of the phase. The output voltage of the power conversion device is controlled using a reversely converted phase obtained by reverse conversion by the phase reverse conversion unit.
Inventors:
SUGIMOTO TAKUYA (JP)
ONUMA YUSAKU (JP)
ONUMA YUSAKU (JP)
Application Number:
PCT/JP2016/059082
Publication Date:
September 28, 2017
Filing Date:
March 23, 2016
Export Citation:
Assignee:
HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)
International Classes:
H02P9/30
Foreign References:
| JP2005348478A | 2005-12-15 | |||
| JP2007244053A | 2007-09-20 | |||
| JPH10285982A | 1998-10-23 |
Other References:
See also references of EP 3435539A4
Attorney, Agent or Firm:
PATENT CORPORATE BODY DAI-ICHI KOKUSAI TOKKYO JIMUSHO (JP)
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