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Title:
POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/261384
Kind Code:
A1
Abstract:
A power conversion device (1) comprises: an inverter circuit (4) connected between positive and negative terminals of a DC power supply (3); three single-phase bridge circuits (5, 6, 7), each connected in series between a motor (2) and one AC terminal of a mutually different phase of the inverter circuit (4); and a power conversion controller (9A) that generates a gate signal controlling operation of the inverter circuit (4) and the three single-phase bridge circuits (5, 6, 7) on the basis of a phase voltage command. If a semiconductor switching element of a single-phase bridge circuit (5, 6, 7) malfunctions, the power conversion controller (9A) sets the output voltage of the single-phase bridge circuit of the phase to which the malfunctioned semiconductor switching element belongs to zero, and continues operations.

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Inventors:
KOJIMA TETSUYA (JP)
FUKUMOTO HISATOSHI (JP)
FUJIWARA KENJI (JP)
IWATA AKIHIKO (JP)
Application Number:
PCT/JP2019/025165
Publication Date:
December 30, 2020
Filing Date:
June 25, 2019
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02M7/48; H02M7/483
Domestic Patent References:
WO2009116273A12009-09-24
Foreign References:
US20140043873A12014-02-13
US20120063181A12012-03-15
JP2004007941A2004-01-08
JP2017070064A2017-04-06
Other References:
MASAKI YAMADA ET AL.: "Development of a New Voltage Sag Compensator with a Gradationally Controlled Voltage Inverter", IEEJ TRANSACTIONS, vol. 127-D, no. 4, 2007, pages 451 - 456
CESAR SILVA ET AL.: "Control of a Hybrid Multilevel Inverter for Current Waveform Improvement", IEEE INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS, CAMBRIDGE, UK, 2008, pages 2329 - 2335, XP002597665, DOI: 10.1109/ISIE.2008.4677279
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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