JPS6298483U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例の構成図、第２図お
よび第３図はそれぞれ異なる従来の直流定電圧電
源装置の構成図である。 ３……整流回路、４……平滑回路、８……負荷
、９……電圧検出回路、１０……放電回路、Ｅｉ
……交流電圧、Ｅｒ……整流電圧、Ｖ……直流電
圧、Ｔ_２……トランジスタ、Ｃ_２……コンデンサ
。 FIG. 1 is a block diagram of an embodiment of the present invention, and FIGS. 2 and 3 are block diagrams of different conventional DC constant voltage power supply devices. 3... Rectifier circuit, 4... Smoothing circuit, 8... Load, 9... Voltage detection circuit, 10... Discharge circuit, Ei
...AC voltage, Er...rectified voltage, V...DC voltage, _T2 ...transistor, _C2 ...capacitor.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 交流電圧を整流電圧に変換する整流回路と、前
記整流電圧を平滑し直流電圧を負荷に供給する平
滑回路と、前記整流電圧の大きさを検出する電圧
検出回路と、前記平滑回路の前段に挿入され前記
電圧検出回路の動作にもとづいて制御されるスイ
ツチング回路とを備えたものにおいて、前記スイ
ツチング回路のトランジスタのコレクタ・エミツ
タ通路を前記整流回路の負荷端に接続し、このト
ランジスタのベースを前記電圧検出回路に接続し
前記トランジスタのコレクタ・エミツタ通路に並
列にダイオードが直列接続されたコンデンサを設
け、かつ前記コンデンサの充電電荷を前記平滑回
路を介して放電させる放電回路を設けたことを特
徴とする直流定電圧電源装置。 a rectifier circuit that converts AC voltage into rectified voltage; a smoothing circuit that smoothes the rectified voltage and supplies DC voltage to the load; a voltage detection circuit that detects the magnitude of the rectified voltage; and a voltage detection circuit that is inserted before the smoothing circuit. and a switching circuit controlled based on the operation of the voltage detection circuit, wherein the collector-emitter path of the transistor of the switching circuit is connected to the load end of the rectifier circuit, and the base of the transistor is controlled based on the operation of the voltage detection circuit. A capacitor connected to the detection circuit and having a diode connected in series in parallel to the collector-emitter path of the transistor is provided, and a discharge circuit is provided for discharging the charge of the capacitor via the smoothing circuit. DC constant voltage power supply.