JPS5969532U

JPS5969532U - delay switch

Info

Publication number: JPS5969532U
Application number: JP16481482U
Authority: JP
Inventors: 金田　博史; 隆司山本
Original assignee: 松下電工株式会社
Priority date: 1982-10-30
Filing date: 1982-10-30
Publication date: 1984-05-11
Also published as: JPH0138995Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来例の回路図、第２図、第３図は同上の動作
説明用の波形図、第４図は本考案の一実施例の回路図で
あり、Ｖｓは交流電源、ＳＷは操作スイッチ、ＤＢｌは
第１のダイオードブリッジ、ＤＢ２は第２のダイオード
ブリッジ、Ｃ１は第１のコンデンサ、Ｃ２は第２のコン
デンサ、Ｑｌは第１のトランジスタ、Ｑ２は第２のトラ
ンジスタ、Ｑ３はトランジスタ、Ｒ７は第１の抵抗、Ｒ
６は第２の抵抗、Ｒｘは第３の抵抗、Ｌは負荷、２はト
ライアック、３は電流トランス、５はＦＥＴ、５はサイ
リスタ、７はインピーダンス切替回路である。FIG. 1 is a circuit diagram of a conventional example, FIGS. 2 and 3 are waveform diagrams for explaining the operation of the same as above, and FIG. 4 is a circuit diagram of an embodiment of the present invention, where Vs is an AC power supply and SW is a circuit diagram of an embodiment of the present invention. Operation switch, DBl is the first diode bridge, DB2 is the second diode bridge, C1 is the first capacitor, C2 is the second capacitor, Ql is the first transistor, Q2 is the second transistor, Q3 is the transistor , R7 is the first resistor, R
6 is a second resistor, Rx is a third resistor, L is a load, 2 is a triac, 3 is a current transformer, 5 is an FET, 5 is a thyristor, and 7 is an impedance switching circuit.

Claims

[Scope of utility model registration request]

A bidirectional power control element is interposed between the AC power source and the load, a series circuit of an operation switch and the primary winding of the current transformer is connected to both ends of the power control element, and the secondary winding of the current transformer is A first diode bridge for rectifying the secondary output is connected to the line, and a first capacitor for a time constant and a discharging circuit are connected between the DC output terminals of the first diode bridge via a charging resistor. A current limiting resistor is connected between the pair of DC output terminals of the second diode bridge so that the control current of the power control element can be turned on and off between one electrode of the power control element and the control pole. A series circuit of a first resistor and a first transistor having a high resistance value is connected in parallel with a series circuit of a second resistor and a second transistor having a low resistance value. , the collector of the first transistor is connected to the base of the second transistor, and a second capacitor charged through the third resistor is connected to the series circuit of the first resistor and the first transistor. A two-terminal impedance switching circuit that applies the voltage across the capacitor between the base and emitter of the first transistor, and turns on the first transistor and turns off the second transistor if the voltage across the capacitor exceeds a predetermined level. and a switching element connected in series between the DC output terminals of the second diode bridge, - applying a voltage across the first capacitor in a reverse bias direction so that there is no charge in the first capacitor; a delay switch that turns on the switching element when the voltage level at the connection point between the impedance switching circuit and the switching element is equal to or higher than a predetermined level; A delay switch consisting of a third resistor inserted in series between the second capacitor and the second capacitor.