Title:
SWITCHING POWER SUPPLY DEVICE
Document Type and Number:
Japanese Patent JP2005318757
Kind Code:
A
Abstract:
To reduce the copper loss of a transformer and the continuity loss of a semiconductor element of a switching power supply that is composed of: a DC power supply; the transformer; a full-bridge circuit connected to a primary side of the transformer; a rectifying circuit connected to a secondary side of the transformer; and a capacitor that smoothes a rectified output of the rectifying circuit.
A primary-side back-flow current of the transformer 140 is reduced, and the copper loss of the transformer and the continuity loss induced by the semiconductor elements 131 to 134 are reduced by adding the capacitors 221, 225, diodes 222 to 228, and inductances 223, 227 or the like to the secondary side rectifying circuit of the transformer 140.
Inventors:
O TAKAOMI
YAMADA RYUJI
GEKITO MASAKAZU
HASHIZUME SHINGO
TAWADA NOBUYUKI
YAMADA RYUJI
GEKITO MASAKAZU
HASHIZUME SHINGO
TAWADA NOBUYUKI
Application Number:
JP2004135426A
Publication Date:
November 10, 2005
Filing Date:
April 30, 2004
Export Citation:
Assignee:
FUJI ELEC FA COMPONENTS & SYS
International Classes:
H02M7/21; H02M3/28; (IPC1-7): H02M3/28; H02M7/21
Attorney, Agent or Firm:
Iwao Yamaguchi
Yoshihide Komada
Kiyoshi Matsuzaki
Yoshihide Komada
Kiyoshi Matsuzaki
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