Title:
MULTI-STAGE DC CHOPPER CIRCUIT AND POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/004015
Kind Code:
A1
Abstract:
In this multi-stage DC chopper circuit, a plurality of chopper circuits connected in multiple stages convert DC power to DC power by turning switching elements on/off, wherein DC power is output by superposing output power from the chopper circuits. In this power conversion device, DC power from the multi-stage DC chopper circuit is smoothed by a smoothing circuit, and a foldback circuit subsequently makes negative the voltage of a half-wave and combines a positive-voltage half-wave and a negative-voltage half-wave to generate AC power. By superposing the output power from the plurality of chopper circuits and outputting DC power, losses are reduced. In addition, each chopper circuit is composed of two series-connected switching elements and is connected to the other chopper circuits in multiple stages, together with a plurality of voltage sources. As a result, losses in the power conversion device are reduced, and power conversion efficiency is increased.
Inventors:
KAWAMURA ATSUO (JP)
TSURUTA YUKINORI (JP)
OBARA HIDEMINE (JP)
TSURUTA YUKINORI (JP)
OBARA HIDEMINE (JP)
Application Number:
PCT/JP2018/023384
Publication Date:
January 03, 2019
Filing Date:
June 20, 2018
Export Citation:
Assignee:
NAT UNIV CORP YOKOHAMA NAT UNIV (JP)
International Classes:
H02M7/49
Foreign References:
| US20160336872A1 | 2016-11-17 | |||
| US20150288284A1 | 2015-10-08 | |||
| JP2014100015A | 2014-05-29 | |||
| JP2005341732A | 2005-12-08 | |||
| JP2013102674A | 2013-05-23 | |||
| JP2016015848A | 2016-01-28 |
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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