Title:
CONVERSION DEVICE AND METHOD FOR CONTROLLING THE SAME
Document Type and Number:
WIPO Patent Application WO/2017/002419
Kind Code:
A1
Abstract:
An non-insulated DC/AC conversion device is provided with: a filter circuit including an AC reactor and a first capacitor; a DC/AC conversion unit; a second capacitor connected to a DC bus; and a DC/DC conversion unit including a DC reactor. Duties for controlling the two conversion units are determined by considering the electrical effects of the filter circuit, second capacitor, and DC reactor on an output voltage command value for supplying an AC voltage to a load. By controlling the DC/DC conversion unit, a DC voltage is converted to a DC bus voltage waveform alternately having a pulsating waveform period corresponding to the absolute value of the AC voltage and a DC voltage period as the pulsating minimum value. By controlling the DC/AC conversion unit, the DC bus voltage waveform is stepped down during the DC voltage period and converted to a waveform having the absolute value of the AC voltage corresponding to the DC voltage period, with the polarity being inverted in every pulsation period.
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Inventors:
SHIMIZU YUSUKE (JP)
AKITA TETSUO (JP)
OKUMURA TOSHIAKI (JP)
AYAI NAOKI (JP)
AKITA TETSUO (JP)
OKUMURA TOSHIAKI (JP)
AYAI NAOKI (JP)
Application Number:
PCT/JP2016/061032
Publication Date:
January 05, 2017
Filing Date:
April 04, 2016
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
H02M7/48
Domestic Patent References:
| WO2014199796A1 | 2014-12-18 |
Foreign References:
| JP2008220001A | 2008-09-18 | |||
| JP2005218157A | 2005-08-11 |
Other References:
See also references of EP 3316471A4
Attorney, Agent or Firm:
SUNCREST PATENT AND TRADEMARK ATTORNEYS (JP)
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