Title:
DC-DC CONVERTER
Document Type and Number:
WIPO Patent Application WO/2020/003717
Kind Code:
A1
Abstract:
This DC-DC converter (1) has a configuration in which a first full-bridge circuit (10) and a second full-bridge circuit (20) are connected to each other through a transformer (T) and an inductor (L1). A control circuit (30) allows each switching element of the first and second full-bridge circuits (10, 20) to perform soft switching. The inductor current (IL) flowing through the equivalent inductor of the transformer (T) and the inductor (L1) at the switching timing of the switching elements is greater than or equal to a threshold current (Iref). The control circuit (30) fixes a switching frequency (f) to keep a polarity inversion period (τc) during which the output (V1) of the first full-bridge circuit (10) and the output (V2) of the second full-bridge circuit (20) are inverted in polarity constant and changes the voltage output periods (τ1, τ2) of the first and second full-bridge circuits (10, 20) to output a predetermined power. This allows a ZVS operation to be performed with a simple control and reduces switching loss.
Inventors:
NAKAHARA SHOGO (JP)
NAKAYAMA HIROYOSHI (JP)
NAKAYAMA HIROYOSHI (JP)
Application Number:
PCT/JP2019/017378
Publication Date:
January 02, 2020
Filing Date:
April 24, 2019
Export Citation:
Assignee:
DIAMOND ELECTRIC MFG (JP)
International Classes:
H02M3/335; H02M3/28
Foreign References:
| US20110249472A1 | 2011-10-13 | |||
| JP2013027201A | 2013-02-04 |
Other References:
KRISMER, FLORIAN ET AL.: "Efficiency-Optimized High-Current Dual Active Bridge Converter for Automotive Applications", IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, vol. 59, no. 7, July 2012 (2012-07-01), pages 2745 - 2760, XP011417615, DOI: 10.1109/TIE.2011.2112312
Attorney, Agent or Firm:
NISHIDA Takami (JP)
Download PDF:
Previous Patent: POWER STORAGE UNIT DEVICE FOR ELECTRIC CONVEYANCE VEHICLE
Next Patent: DC-DC CONVERTER
Next Patent: DC-DC CONVERTER