CN202564134U

CN202564134U - Direct-current intermediate relay having alternating-current interference resistance function

Info

Publication number: CN202564134U
Application number: CN2012202016477U
Authority: CN
Inventors: 张文宝
Original assignee: JIANGYIN XINCHANGHONG RELAY CO Ltd
Current assignee: Jiangyin Xinxuhong Electric Power Technology Co., Ltd.
Priority date: 2012-05-08
Filing date: 2012-05-08
Publication date: 2012-11-28
Anticipated expiration: 2022-05-08

Abstract

The utility model relates to a direct-current intermediate relay having an alternating-current interference resistance function. The direct-current intermediate relay can be used to automatically eliminate alternating-current signal components in a signal, and then determine whether the output contact of the relay is closed according to the size of direct-current components in the signal so as to accurately control the work of equipment. The direct-current intermediate relay comprises a sampling circuit I (1), a sampling circuit II (2), a basic operational circuit (3), a voltage comparison circuit (4), and a power circuit and relay driving circuit (5). The relay driving circuit portion of the power circuit and relay driving circuit (5) is connected with the control end of the direct-current intermediate relay, and a high-level voltage Vcc and a threshold voltage Vz are outputted from the power circuit portion of the power circuit and relay driving circuit (5). The direct-current intermediate relay having the alternating-current interference resistance function can be used to prevent alternating-current electromagnetic signal interference and can be used to automatically eliminate alternating-current components in a signal.

Description

The direct current auxiliary relay that a kind of anti-interchange is disturbed

Technical field

The utility model relates to the direct current auxiliary relay that a kind of anti-interchange is disturbed; It is the AC signal composition in the erasure signal automatically; Size according to flip-flop in the signal determines whether the output contact of relay is closed then, thus correctly control appliance work.

Background technology

In automatic control system; Go control appliance work after often need transmitting through the long distance of dc control signal; Yet dc control signal is in the process of long-distance transmission; Have many alternating electromagnetic interference signals and be coupled in the control signal, make the equipment can't the identification control signal, cause correctly control appliance work through regular meeting.

Summary of the invention

The purpose of the utility model is to overcome above-mentioned deficiency, provides a kind of alternating electromagnetic signal that can prevent to disturb, and the direct current auxiliary relay of a kind of anti-interchange interference of the alternating component in the erasure signal automatically.

The purpose of the utility model is achieved in that

The direct current auxiliary relay that a kind of anti-interchange of the utility model is disturbed; It is characterized in that: it comprises sample circuit I, sample circuit II, fundamental arithmetic circuit, voltage comparator circuit and power circuit and relay drive circuit; The relay drive circuit part of said power circuit and relay drive circuit links to each other with the control end of direct current auxiliary relay, and the power circuit of said power circuit and relay drive circuit is partly exported high level Vcc and threshold voltage Vz.

Input signal Vin is the signal input part of input sampling circuit I, sample circuit II and power circuit and relay drive circuit respectively; High level Vcc in said power circuit and the relay drive circuit receives respectively on sample circuit I, sample circuit II, fundamental arithmetic circuit and the voltage comparator circuit; The threshold voltage Vz of power circuit receives on the comparator of voltage comparator circuit in said power circuit and the relay drive circuit; The output signal of sample circuit I, sample circuit II is delivered on the signal input part of fundamental arithmetic circuit; The output signal of fundamental arithmetic circuit is received on the relatively end of comparator of voltage comparator circuit, and the output of comparator obtains on the signal input part that drive signal Vx imports power circuit and relay drive circuit repeat circuit driving circuit section again.

Said sample circuit I is made up of CT sample circuit and amplifying circuit, perhaps is made up of electric capacity sample circuit and amplifying circuit.

Said sample circuit II is made up of resistance sampling circuit and amplifying circuit.

Said fundamental arithmetic circuit is add circuit or subtraction circuit.

Said voltage comparator circuit is made up of minute hydraulic circuit and comparison circuit.

The direct current auxiliary relay that a kind of anti-interchange of the utility model is disturbed has the following advantages:

The direct current auxiliary relay that a kind of anti-interchange of the utility model is disturbed can be handled input signal and obtain pure direct current signal; Subsequently itself and threshold voltage are obtained drive signal after relatively and drive relay work; So just, can eliminate the interference of alternating electromagnetic signal fully, thus correct control appliance work.

Description of drawings

Fig. 1 is the structural representation of the direct current auxiliary relay of a kind of anti-interchange interference of the utility model.

Among the figure: sample circuit I 1, sample circuit II 2, fundamental arithmetic circuit 3, voltage comparator circuit 4, power circuit and relay drive circuit 5.

Embodiment

Referring to Fig. 1; The direct current auxiliary relay that a kind of anti-interchange that the utility model relates to is disturbed; It comprises sample circuit I 1, sample circuit II 2, fundamental arithmetic circuit 3, voltage comparator circuit 4 and power circuit and relay drive circuit 5; Said sample circuit I 1 can be made up of CT sample circuit and amplifying circuit, also can be made up of electric capacity sample circuit and amplifying circuit, and said sample circuit II 2 is made up of resistance sampling circuit and amplifying circuit; Said fundamental arithmetic circuit 3 can be add circuit or subtraction circuit, and said voltage comparator circuit is made up of minute hydraulic circuit and comparison circuit.

The relay drive circuit part of said power circuit and relay drive circuit 5 links to each other with the control end of direct current auxiliary relay; Wherein driving the optocoupler that auxiliary relay uses can use triode, metal-oxide-semiconductor to replace realizing; The power circuit of said power circuit and relay drive circuit 5 is partly exported high level Vcc and threshold voltage Vz; Wherein Vcc can replace realizing with an independent DC/DC circuit, and without electric resistance partial pressure; Said Vz can use the accurate voltage integrated circuit to replace realizing; And need not use voltage-stabiliser tube; Diode in said power circuit and the relay drive circuit 5 can replace with rectifier bridge; Vcc, Vz and relay drive circuit can be connected on the same loop, maybe can make up to be connected on two loops, or can three loops of single-row formation.

Input signal Vin is the signal input part of input sampling circuit I 1, sample circuit II 2 and power circuit and relay drive circuit 5 respectively; The high level Vcc that power circuit partly produces in said power circuit and the relay drive circuit 5 receives respectively on sample circuit I 1, sample circuit II 2, fundamental arithmetic circuit 3 and the voltage comparator circuit 4; The threshold voltage Vz that power circuit partly produces in said power circuit and the relay drive circuit 5 receives on the comparator of voltage comparator circuit 4; The output signal of sample circuit I 1, sample circuit II 2 is delivered to the enterprising row operation of signal input part of fundamental arithmetic circuit 3; The pure direct current signal that produces is received on the relatively end of comparator of voltage comparator circuit 4 and is compared with threshold voltage Vz; Obtain drive signal Vx; This drive signal Vx imports on the signal input part of power circuit and relay drive circuit 5 repeat circuit driving circuit section again; Be used to drive relay work, whether closed according to the output contact of the size of flip-flop in signal decision relay.

The design is achieved in that input signal Vin obtains pure AC signal a through CT mutual inductance or electric capacity isolation on sample circuit I 1; On sample circuit II 2, obtain input voltage signal b through electric resistance partial pressure or Hall element; Pure subsequently AC signal a and input voltage signal b send in the fundamental arithmetic circuit 3; Two signal processing are after AC signal amplitude phase place unanimity wherein; Utilize subtraction circuit or just can obtain pure direct current signal utilizing add circuit that input voltage signal b is deducted pure AC signal a after the pure AC signal a anti-phase; Through comparison circuit pure direct current signal and threshold voltage Vz are compared subsequently and obtain drive signal Vx, go to drive relay work by drive signal Vx at last, export several groups of contacts.

Claims

1. one kind resists the direct current auxiliary relay that exchanges interference; It is characterized in that: it comprises sample circuit I (1), sample circuit II (2), fundamental arithmetic circuit (3), voltage comparator circuit (4) and power circuit and relay drive circuit (5); The relay drive circuit part of said power circuit and relay drive circuit (5) links to each other with the control end of direct current auxiliary relay, and the power circuit of said power circuit and relay drive circuit (5) is partly exported high level Vcc and threshold voltage Vz;

Input signal Vin is the signal input part of input sampling circuit I (1), sample circuit II (2) and power circuit and relay drive circuit (5) respectively; High level Vcc in said power circuit and the relay drive circuit (5) receives respectively on sample circuit I (1), sample circuit II (2), fundamental arithmetic circuit (3) and the voltage comparator circuit (4); The threshold voltage Vz of power circuit receives on the comparator of voltage comparator circuit (4) in said power circuit and the relay drive circuit (5); The output signal of sample circuit I (1), sample circuit II (2) is delivered on the signal input part of fundamental arithmetic circuit (3); The output signal of fundamental arithmetic circuit (3) is received on the relatively end of comparator of voltage comparator circuit (4), and the output of comparator obtains on the signal input part that drive signal Vx imports power circuit and relay drive circuit (5) repeat circuit driving circuit section again.

2. the direct current auxiliary relay that a kind of anti-interchange according to claim 1 is disturbed, it is characterized in that: said sample circuit I (1) is made up of CT sample circuit and amplifying circuit, perhaps is made up of electric capacity sample circuit and amplifying circuit.

3. the direct current auxiliary relay that a kind of anti-interchange according to claim 1 is disturbed, it is characterized in that: said sample circuit II (2) is made up of resistance sampling circuit and amplifying circuit.

4. the direct current auxiliary relay that a kind of anti-interchange according to claim 1 is disturbed, it is characterized in that: said fundamental arithmetic circuit (3) is add circuit or subtraction circuit.

5. the direct current auxiliary relay that a kind of anti-interchange according to claim 1 is disturbed, it is characterized in that: said voltage comparator circuit (4) is made up of minute hydraulic circuit and comparison circuit.