Title:
POWER CONVERTER
Document Type and Number:
WIPO Patent Application WO/2016/092683
Kind Code:
A1
Abstract:
The purpose of the present invention is to make it possible to perform a PWM operation at a carrier frequency that more accurately minimizes loss.
The carrier frequency (FC) of a PWM signal (PLS) is varied between a carrier frequency upper limit (LimH) and a carrier frequency lower limit (LimL) by a voltage value (VDC) of DC power and a current value (IAC) of AC power.
The carrier frequency (FC) is controlled so that: when the carrier frequency (FC) and the voltage value (VDC) of the DC power are taken along the Y-axis and X-axis, respectively, to represent the relationship therebetween on an X-Y graph, an upward convex graph is formed; and when the carrier frequency (FC) and the current value (IAC) of the AC power are taken along the Y-axis and X-axis, respectively, to represent the relationship therebetween on an X-Y graph, a downward convex graph is formed.
Inventors:
KAGEYAMA HIROSHI (JP)
HATANAKA AYUMU (JP)
MASUDA TORU (JP)
KAWAMURA DAICHI (JP)
HATANAKA AYUMU (JP)
MASUDA TORU (JP)
KAWAMURA DAICHI (JP)
Application Number:
PCT/JP2014/082910
Publication Date:
June 16, 2016
Filing Date:
December 12, 2014
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H02M7/48
Domestic Patent References:
| WO2014049779A1 | 2014-04-03 |
Foreign References:
| JPH11187669A | 1999-07-09 | |||
| JPH06141402A | 1994-05-20 | |||
| JP2005210862A | 2005-08-04 | |||
| US4843202A | 1989-06-27 | |||
| JPH10271835A | 1998-10-09 | |||
| JP2013055794A | 2013-03-21 |
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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