Title:
DC/DC CONVERTER
Document Type and Number:
WIPO Patent Application WO/2019/038979
Kind Code:
A1
Abstract:
Provided is a DC/DC converter in which a reactor (L1) has one end connected to a neutral point (NP1) of a transformer (30) and the other end connected to a primary side power supply (60), said transformer (30) having almost no effective interlinkage magnetic flux with respect to zero-phase current and having a phase difference between the primary side and the secondary side. A first bridge circuit (12) and a second bridge circuit (22) are connected to both ends of the transformer (30), and the power of the primary side power supply (60) is controlled by the duty ratio of the first bridge circuit (12). The switching pattern of the second bridge circuit (22) is phase-shifted in a leading direction and a lagging direction with reference to the switching pattern of the first bridge circuit (12), thereby implementing control so that a soft switching operation can be performed even when the voltage ratio between the primary side power supply (60) and a secondary side power supply (70) fluctuates and the amount of transferred power is decreased. The DC/DC converter is applicable to a power supply of which the voltage fluctuates, such as a storage battery, and makes it possible to provide a power conversion means with which loss in a low output region can be reduced.
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Inventors:
ITOGAWA YUKI (JP)
AMIMOTO TAKESHI (JP)
AMIMOTO TAKESHI (JP)
Application Number:
PCT/JP2018/013086
Publication Date:
February 28, 2019
Filing Date:
March 29, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02M3/28
Foreign References:
| JPH09252576A | 1997-09-22 | |||
| JP2005110384A | 2005-04-21 | |||
| JP2016073121A | 2016-05-09 | |||
| JP2014230460A | 2014-12-08 | |||
| JP2009148107A | 2009-07-02 | |||
| JP2010004724A | 2010-01-07 | |||
| JP2016208693A | 2016-12-08 | |||
| JP2015027196A | 2015-02-05 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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