Title:
スイッチング電源装置
Document Type and Number:
Japanese Patent JP4590040
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve efficiency by constituting a simple circuit where the number of parts is small, and also remove unnecessary converter loss, in a switching power unit which has a plurality of DC-DC converters. SOLUTION: AC from an AC power source 1 is rectified with a diode bridge 3, and the DC is supplied to the transformer 5b of a main converter and the transformer 5a of a subconverter. Then, the output is generated on the secondary side of a transformer, by turning on or turning off the main switching element 6b and the sub switching element 6a. Moreover, only the main converter is provided with an auxiliary power source 10 for a control circuit 11b, and the control circuit 11a of the subconverter is supplied with power via a switch circuit 12 from this auxiliary power source 10. The switching circuit 12 is controlled by the trigger circuit from the outside.
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Inventors:
Hisahiro Kamada
Keiichi Sugai
Keiichi Sugai
Application Number:
JP31777498A
Publication Date:
December 01, 2010
Filing Date:
November 09, 1998
Export Citation:
Assignee:
Tohoku Ricoh Co., Ltd.
International Classes:
H02J1/00; H02M3/28
Domestic Patent References:
| JP9285121A | ||||
| JP8256477A | ||||
| JP5161252A |
Attorney, Agent or Firm:
Hiroyuki Niwa
Tadao Noguchi
Tadao Noguchi