Title:
POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/185812
Kind Code:
A1
Abstract:
When a load current (IL) is larger than a prescribed value (Ic), a control device (18) of an uninterruptible power supply device (1) controls an inverter (10) by using a gate signal (Au, Bu) which has a comparatively high frequency (fH) and of which the pulse width is controlled, and when the load current (IL) is smaller than the prescribed value (Ic), the control device (18) controls the inverter (10) by using a gate signal (Au, Bu) which has a comparatively low frequency (fL) and of which the pulse width is fixed. Therefore, it is possible to reduce switching loss caused in IGBTs (Q1-Q4) of the inverter (10) when the load (24) is a light load.
Inventors:
TOYODA MASARU (JP)
Application Number:
PCT/JP2017/013954
Publication Date:
October 11, 2018
Filing Date:
April 03, 2017
Export Citation:
Assignee:
TOSHIBA MITSUBISHI ELEC IND (JP)
International Classes:
H02M7/48
Foreign References:
| JP2001128462A | 2001-05-11 | |||
| JP2015057027A | 2015-03-23 | |||
| JP2007282443A | 2007-10-25 | |||
| US20080218284A1 | 2008-09-11 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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