Title:
POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/207249
Kind Code:
A1
Abstract:
A control device (20) for controlling switching elements (2, 3) in a power conversion circuit (1) is provided with a pattern generation unit (20) for generating a frequency changing pattern (25) and a controller (22). The pattern generation unit (20) uses n first frequencies fc and a second frequency fdef smaller than the minimum value of the differences between the n first frequencies fc to determine 2n switching frequencies f by adding and subtracting the second frequency fdef to and from each of the n first frequencies fc and determines the transition order of the 2n switching frequencies f so that the central value of two switching frequencies f before and after the transition does not overlap with the value of each of the switching frequencies f, thereby generating the frequency changing pattern (25). The controller (22) generates control signals G for the switching elements (2, 3) by using the 2n switching frequencies f with respective different duration times in accordance with the frequency changing pattern (25).
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Inventors:
HANIOKA SHOTA (JP)
IEZAWA MASAHIRO (JP)
IEZAWA MASAHIRO (JP)
Application Number:
PCT/JP2017/017500
Publication Date:
November 15, 2018
Filing Date:
May 09, 2017
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02M1/44; H02M3/155; H02M7/48
Domestic Patent References:
| WO2012172684A1 | 2012-12-20 |
Foreign References:
| JP2007295744A | 2007-11-08 | |||
| US20130200828A1 | 2013-08-08 | |||
| JP2016054581A | 2016-04-14 | |||
| JP5473079B2 | 2014-04-16 |
Other References:
See also references of EP 3624321A4
Attorney, Agent or Firm:
MURAKAMI Keigo et al. (JP)
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