JPS6281487U

JPS6281487U -

Info

Publication number: JPS6281487U
Application number: JP17186285U
Authority: JP
Priority date: 1985-11-08
Filing date: 1985-11-08
Publication date: 1987-05-25

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例における回路構成図
、第２図は従来例の説明図である。１……有接点コンタクターで１ａはその接点、
２……ダイオードブリツチ、３……平滑化コンデ
ンサ、４，５ａ，５，９，１０，１２，１４，１
５，１６，１９，２０……抵抗、５，１７……ト
ランジスタ、６，６ａ……電圧上昇制限のための
回路、８……フオトカプラ、１１……コンデンサ
、１３……コンパレータ。 FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a conventional example. 1...Contact contactor, 1a is its contact,
2... Diode bridge, 3... Smoothing capacitor, 4, 5a, 5, 9, 10, 12, 14, 1
5, 16, 19, 20...Resistor, 5, 17...Transistor, 6, 6a...Circuit for limiting voltage rise, 8...Photocoupler, 11...Capacitor, 13...Comparator.

Claims

[Scope of Claim for Utility Model Registration] 1. Means for connecting a series circuit consisting of a resistor and a semiconductor element in parallel with a smoothing capacitor provided at the output stage of an AC/DC conversion circuit that receives power from an AC power source and converts AC into DC. A smoothing capacitor discharging device comprising: a means for turning on a semiconductor element based on power failure information when an alternating current power supply fails; and a control power supply for sufficiently continuing the on state of the semiconductor element. 2. The smoothing capacitor discharge device according to claim 1, which is provided with a transistor as a semiconductor element. 3. The smoothing capacitor discharge device according to claim 1, wherein the power failure information detection means includes a photocoupler and a comparator.