CN2255697Y

CN2255697Y - AC. trigger electronic automatic controller

Info

Publication number: CN2255697Y
Application number: CN 95237365
Authority: CN
Inventors: 袁九如
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-08-08
Filing date: 1995-08-08
Publication date: 1997-06-04
Anticipated expiration: 2005-08-08

Abstract

The utility model relates to an alternating current trigger electronic automatic controller. The utility model is designed on the basis of the principle of the bidirectional thyristor with bilateral cutting and switching on by triggering. The circuit is composed of a thyristor, a capacitor, a resistor, etc. The utility model has the advantages of no polarity protection, simple circuit, low cost, high sensitivity, stable performance, and long service life, and is widely suitable for control circuits, switch circuits and protection circuits.

Description

Exchange and trigger electronic automatic controller

The present utility model belongs to a kind of control circuit, device for switching and protective circuit and triggers electronic automatic controller with exchanging.

Existing controller all is to utilize the control of one-way SCR conducting principle, and existing needs polarity protection, the circuit complexity, and the cost height uses defectives such as cumbersome.

The purpose of the present utility model is that design does not a kind ofly need that polarity protection, circuit are simple, the interchange of stable performance, long service life triggers electronic automatic controller.

Solution of the present utility model is: the circuit structure that changes original controller, change bidirectional triode thyristor into by the one-way SCR conducting and cut only conducting, utilize and exchange triggering signal by capacitor C and correction resistance R control bidirectional triode thyristor trigger electrode electric current, this circuit is by bidirectional triode thyristor SCR, capacitor C, resistance R is formed.The major parameter of element: silicon symmetrical switch SCR trigger current is decided by the triggering signal of controlled circuit electric current, voltage swing and controlled circuit output, when connecting use with telephone set as this interchange triggering electronic automatic controller, bidirectional triode thyristor SCR trigger current safeguards that at 1-30MA electric current is at 0.1-10MA; Capacitor C is C=trigger current/(6.28 * trigger current frequency * trigger voltage) and getting by formula; Resistance R is to proofread and correct resistance, its size, and with the self-locking of assurance circuit, and easily triggering and conducting is an optimum value.

This interchange triggers electronic automatic controller following advantage:

The one, self-locking electrical equipment;

The 2nd, when the controlled circuit input sends certain trigger current or voltage, frequency all can make this latching circuit connect automatically;

The 3rd, when the conducting electric current is kept electric current less than controllable silicon, the circuit automatic self-locking.

In sum, adopt this interchange to trigger electronic automatic controller, having does not need polarity protection, and circuit is simple, and cost is low, and is highly sensitive, and stability is good; The characteristics of long service life.Be widely used in control circuit, switching circuit and protective circuit.

Accompanying drawing triggers the electronic automatic controller circuit diagram for exchanging.

Embodiment:

Being used for the electricity machine of living with this interchange triggering electronic automatic controller is example: will exchange the triggering electronic automatic controller and directly connect with telephone set network, when automatic telephone sends 90V, when 25HZ exchanges triggering signal (ring), triggering signal under enter, electric current is through capacitor C, resistance R, trigger electrode G, trigger bidirectional triode thyristor SCR, make the T1-T2 conducting, off-hook can be conversed, and the talk-through phone conducting electric current of hanging up reduces, bidirectional triode thyristor recovers to cut and ends, and telephone circuit is in the automatic self-locking state again.Can reach like this and prevent that other people from dialing steathily, can guarantee that again the phone of dragging on normally uses.

Claims

A kind of interchange triggers electronic automatic controller, its characteristic change the circuit structure of this controller, change bidirectional triode thyristor into by original one-way SCR conducting and cut only conducting, circuit is made up of bidirectional triode thyristor SCR, capacitor C, resistance R.