Title:
【発明の名称】電子スイッチ式パワーサプライ及びその使用方法
Document Type and Number:
Japanese Patent JP2000508509
Kind Code:
A
Abstract:
The invention is directed to an electronic switched-mode power supply for supplying power to an electrical energy-absorbing device from an AC or DC voltage source of different voltage levels, with a primary switched-mode flyback converter which includes a transformer having its secondary winding connected in series with the electrical energy-absorbing device and a first diode, while its primary winding is connected in series with the collector-emitter circuit of a first transistor having its base connected to the one end of the secondary winding of the transformer through a feedback capacitor, the base of the first transistor being further connected to the one pole of the input voltage source, wherein several feedback capacitors are provided which, during the transformer discharge cycle, are connected to the secondary winding of the transformer, acting as parallel-connected capacitors, and which, during the transformer charge cycle, are connected to a branch comprising the base-emitter circuit of the first transistor, acting as serially-connected capacitors. The invention is suited for use in an electric shaving apparatus.
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Inventors:
Gunter, Berg
Application Number:
JP53669597A
Publication Date:
July 04, 2000
Filing Date:
April 04, 1997
Export Citation:
Assignee:
Brown Akchen Gezel Shaft
International Classes:
H02M3/28; H02J7/02; H02M1/10; H02M3/338; (IPC1-7): H02M3/28; H02M3/338
Attorney, Agent or Firm:
Yoshiki Hasegawa (2 outside)