CN203398751U - Air breaker controlled by electronic circuit - Google Patents

Air breaker controlled by electronic circuit Download PDF

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Publication number
CN203398751U
CN203398751U CN201320515798.4U CN201320515798U CN203398751U CN 203398751 U CN203398751 U CN 203398751U CN 201320515798 U CN201320515798 U CN 201320515798U CN 203398751 U CN203398751 U CN 203398751U
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China
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voltage
output
input
circuit
current
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田野
田建平
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Beijing Dongdao Science and Trade Co., Ltd.
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田野
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Abstract

The utility model discloses an air breaker controlled by an electronic circuit, characterized by comprising a voltage input terminal, a first current input terminal, a second current input terminal, a voltage detection unit in connection with the voltage input terminal, a comparison unit I in connection with the voltage detection unit, a current detection unit in connection with the first current input terminal and the second current input terminal, a comparison unit II in connection with the current detection unit, a comparison unit III in connection with the current detection unit, an OR gate in connection with the comparison unit I and the comparison unit II, an AND gate in connection with an OR gate output terminal and the comparison unit III, a driving unit in connection with an AND gate output terminal, an air breaker, and a breaking control unit in connection with the driving unit and the air breaker and used for controlling air breaker breaking. The air breaker controlled by an electronic circuit can effectively break fault loops in the case of overload or short circuit under the condition of commercial power and inverter power supply.

Description

A kind of air circuit by electronic circuit control
Technical field
The utility model relates to electronic device field, is specially a kind of air circuit by electronic circuit control.
Background technology
At present in the power supply unit being formed by civil power and inverter; also do not have a kind of under civil power and two kinds of conditions of power supply of inverter; air circuit that all can effectively disjunction fault loop when there is overload or short trouble; use air circuit of the prior art can cause because inverter protection makes also dead electricity simultaneously of the loop of not breaking down, and then bring unnecessary power supply trouble.
Summary of the invention
The utility model is for the proposition of above problem, and develops a kind of convenient and practical, safe and reliable air circuit by electronic circuit control.
The technical solution of the utility model is:
An air circuit by electronic circuit control, comprising:
Receive the voltage input end of input voltage;
Receive the first current input terminal and second current input terminal of input current;
Connect voltage input end, for detection of input voltage size, also export the voltage detection unit of the voltage detection signal corresponding with input voltage;
Connect voltage detection unit, for the voltage detection signal corresponding with input voltage and the reference voltage I of voltage detection unit output are compared to rear output high level or low level comparing unit I;
Connect the first current input terminal and the second current input terminal, for detection of input current size, also export the current detecting unit of the voltage detection signal corresponding with input current;
Connect current detecting unit, for the voltage detection signal corresponding with input current and the reference voltage II of current detecting unit output are compared to rear output high level or low level comparing unit II;
Connect current detecting unit, for the voltage detection signal corresponding with input current and the reference voltage III of current detecting unit output are compared to rear output high level or low level comparing unit III;
Connect comparing unit I and comparing unit II, for the high level of comparing unit I and the output of comparing unit II or low level are carried out to logic OR computing or door;
Connection or gate output terminal and comparing unit III, for to or the high level exported of door and comparing unit III or low level carry out logic and operation with door;
Connect the driver element with gate output terminal;
Air circuit;
Connect driver element and air circuit, for the disjunction control unit of effective driving signal controlling air circuit disjunction of transmitting according to driver element;
Further, described voltage detection unit comprises:
Connect voltage input end, the rectification circuit I being formed by rectifier diode D1, D2, D3 and D4;
Connect rectification circuit I output, by the mutual bleeder circuit in series of resistance R 18, R19 and R20;
The optical coupler U4 that input is in parallel with resistance R 18;
Further, described comparing unit I comprises:
The reference voltage I consisting of between power supply VCC and ground resistance R 12 and the mutual series connection of R13 produces circuit;
Inverting input is connected with optical coupler U4 output, and in-phase input end produces with reference voltage I the comparator U1 that circuit is connected;
Further, described current detecting unit comprises:
Primary side is serially connected in the current transformer TA1 between the first current input terminal and the second current input terminal;
The sample resistance R01 in parallel with current transformer TA1 secondary side;
Connect current transformer TA1 secondary side, the rectification circuit II being formed by rectifier diode D5, D6, D7 and D8;
Further, described comparing unit II comprises:
The reference voltage II consisting of between power supply VCC and ground resistance R 16 and the mutual series connection of R17 produces circuit;
In-phase input end is connected with rectification circuit II output, and inverting input produces with reference voltage II the comparator U2 that circuit is connected;
Described comparing unit III comprises:
The reference voltage III consisting of between power supply VCC and ground resistance R 04, the mutual series connection of R05 produces circuit;
In-phase input end is connected with rectification circuit II output, and inverting input produces with reference voltage III the comparator U3 that circuit is connected;
Further, described or door comprises:
Anode connects respectively comparator U1 output and comparator U2 output, diode D13 and D14 that common cathode connects;
The pull down resistor R14 being connected with the negative electrode of diode D13 and D14;
Further, described and door comprises:
Negative electrode connects respectively the common cathode limit of comparator U3 output and diode D13, D14, altogether diode D11 and the D12 of anodic bonding;
The pull-up resistor R07 being connected with the anode of diode D11 and D12;
Further,
Described disjunction control unit comprises switching tube Q1 and solenoid T1; Described solenoid T1 one end connects power supply V by current-limiting resistance R10, other end connecting valve pipe Q1 drain electrode; Described switching tube Q1 source electrode is connected with ground;
Described driver element comprises:
Be serially connected in the common anode limit of diode D11, D12 and the driving resistance R 08 between switching tube Q1 grid;
And be connected in the resistance R 09 between switching tube Q1 grid and source electrode;
Further, described voltage detection unit also comprises:
The capacitor C 4 in parallel with resistance R 18;
Be connected in parallel on the voltage stabilizing didoe Z4 at the series circuit two ends of resistance R 18 and R19 formation;
Described current detecting unit also comprises resistance R 02 and diode D9, D10; Described comparator U2 in-phase input end is connected with rectification circuit II output cathode with diode D9 by the resistance R 02 of mutual series connection; Described comparator U3 in-phase input end is connected with rectification circuit II output cathode with diode D10 by the resistance R 02 of mutual series connection;
Described comparing unit I also comprises and is connected in the capacitor C 3 between comparator U1 inverting input and ground;
Described comparing unit II also comprises in-phase input end and the capacitor C between ground 2, resistance R 15 and the voltage stabilizing didoe Z2 that is connected on comparator U2 parallel with one another;
Described comparing unit III also comprises in-phase input end and the capacitor C between ground 1, resistance R 03 and the voltage stabilizing didoe Z1 that is connected on comparator U3 parallel with one another;
Described disjunction control unit also comprises the sustained diode in parallel with solenoid T1 15;
The described air circuit by electronic circuit control also comprises resistance R 11 and the voltage stabilizing didoe Z3 of mutual series connection between power supply V and ground; Described voltage stabilizing didoe Z3 negative electrode is as power supply VCC output;
Further, also comprise plug-in type connection terminal P1, the P2 cooperatively interacting; The output of described optical coupler U4 is connected with the inverting input of comparator U1 by plug-in type connection terminal P1, P2; The common anode limit of described diode D11, D12 is connected with driving resistance R 08 by plug-in type connection terminal P1, P2.
Owing to having adopted technique scheme, a kind of air circuit by electronic circuit control that the utility model provides, in the power supply unit that can be applied to be formed by civil power and inverter, voltage detection unit wherein, current detecting unit, comparing unit I, comparing unit II, comparing unit III, or door, with door, driver element and disjunction control unit form the electronic circuit of controlling air circuit, when mains-supplied, disconnect being connected of described electronic circuit and air circuit, directly air circuit is serially connected in the feeding circuit of civil power, air circuit self completes the disjunction of load, when inverter is powered, by the disjunction of described electronic circuit control air circuit, air circuit is serially connected in the feeding circuit of inverter, the condition of realization when meeting the voltage detection signal corresponding with the output voltage of inverter simultaneously and be less than reference voltage I and while being greater than the condition of reference voltage III with voltage detection signal corresponding to the output current of inverter, or the condition when meeting the voltage detection signal corresponding with the output current of inverter simultaneously and being greater than reference voltage II and while being greater than the condition of reference voltage III with voltage detection signal corresponding to the output current of inverter, the disjunction of electronic circuit control air circuit, thereby can be under civil power and two kinds of conditions of power supply of inverter, all can effectively disjunction fault loop when there is overload or short trouble.The utility model is convenient and practical, safe and reliable, be not only convenient to produce, and cost is very cheap is suitable for extensive popularization.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
A kind of air circuit by electronic circuit control as shown in Figure 1, comprising: the voltage input end that receives input voltage; Receive the first current input terminal and second current input terminal of input current; Connect voltage input end, for detection of input voltage size, also export the voltage detection unit of the voltage detection signal corresponding with input voltage; Connect voltage detection unit, for the voltage detection signal corresponding with input voltage and the reference voltage I of voltage detection unit output are compared to rear output high level or low level comparing unit I; Connect the first current input terminal and the second current input terminal, for detection of input current size, also export the current detecting unit of the voltage detection signal corresponding with input current; Connect current detecting unit, for the voltage detection signal corresponding with input current and the reference voltage II of current detecting unit output are compared to rear output high level or low level comparing unit II; Connect current detecting unit, for the voltage detection signal corresponding with input current and the reference voltage III of current detecting unit output are compared to rear output high level or low level comparing unit III; Connect comparing unit I and comparing unit II, for the high level of comparing unit I and the output of comparing unit II or low level are carried out to logic OR computing or door; Connection or gate output terminal and comparing unit III, for to or the high level exported of door and comparing unit III or low level carry out logic and operation with door; Connect the driver element with gate output terminal; Air circuit; Connect driver element and air circuit, for the disjunction control unit of effective driving signal controlling air circuit disjunction of transmitting according to driver element; Further, described voltage detection unit comprises: connect voltage input end, the rectification circuit I consisting of rectifier diode D1, D2, D3 and D4; Connect rectification circuit I output, by the mutual bleeder circuit in series of resistance R 18, R19 and R20; The optical coupler U4 that input is in parallel with resistance R 18; Further, described comparing unit I comprises: the reference voltage I consisting of between power supply VCC and ground resistance R 12 and the mutual series connection of R13 produces circuit; Inverting input is connected with optical coupler U4 output, and in-phase input end produces with reference voltage I the comparator U1 that circuit is connected; Further, described current detecting unit comprises: primary side is serially connected in the current transformer TA1 between the first current input terminal and the second current input terminal; The sample resistance R01 in parallel with current transformer TA1 secondary side; Connect current transformer TA1 secondary side, the rectification circuit II being formed by rectifier diode D5, D6, D7 and D8; Further, described comparing unit II comprises: the reference voltage II consisting of between power supply VCC and ground resistance R 16 and the mutual series connection of R17 produces circuit; In-phase input end is connected with rectification circuit II output, and inverting input produces with reference voltage II the comparator U2 that circuit is connected; Described comparing unit III comprises: the reference voltage III consisting of between power supply VCC and ground resistance R 04, the mutual series connection of R05 produces circuit; In-phase input end is connected with rectification circuit II output, and inverting input produces with reference voltage III the comparator U3 that circuit is connected; Described or door comprises: anode connects respectively comparator U1 output and comparator U2 output, diode D13 and D14 that common cathode connects; The pull down resistor R14 being connected with the negative electrode of diode D13 and D14; Further, describedly comprise with door: negative electrode is connected respectively the common cathode limit of comparator U3 output and diode D13, D14, altogether diode D11 and the D12 of anodic bonding; The pull-up resistor R07 being connected with the anode of diode D11 and D12; Further, described disjunction control unit comprises switching tube Q1 and solenoid T1; Described solenoid T1 one end connects power supply V by current-limiting resistance R10, other end connecting valve pipe Q1 drain electrode; Described switching tube Q1 source electrode is connected with ground; Described driver element comprises: be serially connected in the common anode limit of diode D11, D12 and the driving resistance R 08 between switching tube Q1 grid; And be connected in the resistance R 09 between switching tube Q1 grid and source electrode; Further, described voltage detection unit also comprises: the capacitor C 4 in parallel with resistance R 18; Be connected in parallel on the voltage stabilizing didoe Z4 at the series circuit two ends of resistance R 18 and R19 formation; Described current detecting unit also comprises resistance R 02 and diode D9, D10; Described comparator U2 in-phase input end is connected with rectification circuit II output cathode with diode D9 by the resistance R 02 of mutual series connection; Described comparator U3 in-phase input end is connected with rectification circuit II output cathode with diode D10 by the resistance R 02 of mutual series connection; Described comparing unit I also comprises and is connected in the capacitor C 3 between comparator U1 inverting input and ground; Described comparing unit II also comprises in-phase input end and the capacitor C between ground 2, resistance R 15 and the voltage stabilizing didoe Z2 that is connected on comparator U2 parallel with one another; Described comparing unit III also comprises in-phase input end and the capacitor C between ground 1, resistance R 03 and the voltage stabilizing didoe Z1 that is connected on comparator U3 parallel with one another; Described disjunction control unit also comprises the sustained diode in parallel with solenoid T1 15; The described air circuit by electronic circuit control also comprises resistance R 11 and the voltage stabilizing didoe Z3 of mutual series connection between power supply V and ground; Described voltage stabilizing didoe Z3 negative electrode is as power supply VCC output; Further, also comprise plug-in type connection terminal P1, the P2 cooperatively interacting; The output of described optical coupler U4 is connected with the inverting input of comparator U1 by plug-in type connection terminal P1, P2; The common anode limit of described diode D11, D12 is connected with driving resistance R 08 by plug-in type connection terminal P1, P2.
While using a kind of air circuit by electronic circuit control described in the utility model, in the power supply unit that can be applied to be formed by civil power and inverter, voltage detection unit wherein, current detecting unit, comparing unit I, comparing unit II, comparing unit III, or door, with door, driver element and disjunction control unit form the electronic circuit of controlling air circuit, when mains-supplied, disconnect being connected of described electronic circuit and air circuit, directly air circuit is serially connected in the feeding circuit of civil power, air circuit self completes the disjunction of load, when inverter is powered, by the disjunction of described electronic circuit control air circuit, air circuit is serially connected in the feeding circuit of inverter, voltage input end is connected in parallel on the output of inverter, for receiving the output voltage of inverter, the first current input terminal and the second current input terminal series connection are in the output loop of inverter, for receiving the output current of inverter, the output voltage of inverter obtains the direct voltage corresponding with the output voltage of inverter after by the rectification circuit I rectification consisting of rectifier diode D1, D2, D3 and D4, again through by resistance R 18, R19 and R20 mutually after bleeder circuit in series, at resistance R 18 two ends, obtain the sampling voltage corresponding with the output voltage of inverter, preferably, resistance R 18 two ends are parallel with capacitor C 4, are convenient to the interference in the filtering sampling voltage corresponding with the output voltage of inverter, preferably, the series circuit two ends that resistance R 18 and R19 form are parallel with voltage stabilizing didoe Z4, when the output voltage of inverter is too high, the electric current that flows through voltage stabilizing didoe Z4 reaches after certain value, and voltage stabilizing didoe Z4 reverse breakdown is operated in voltage stabilizing state, has avoided the too high damage causing follow-up electronic circuit of output voltage due to inverter, the sampling voltage corresponding with the output voltage of inverter is input to the input of optical coupler U4, after the photoelectricity isolation of optical coupler U4 and voltage linear convert, obtains the voltage detection signal corresponding with the output voltage of inverter, the voltage detection signal corresponding with the output voltage of inverter inputs to the inverting input of comparator U1, preferably, between comparator U1 inverting input and ground, be also parallel with capacitor C 3, be convenient to the interference in the filtering voltage detection signal corresponding with the output voltage of inverter, the reference voltage I that the in-phase input end input of comparator U1 consists of between power supply VCC and ground resistance R 12 and the mutual series connection of R13 produces the reference voltage I that circuit produces, the comparator U1 pair of voltage detection signal corresponding with the output voltage of inverter and reference voltage I compare, when voltage detection signal corresponding to the output voltage with inverter is less than reference voltage I, comparator U1 exports high level, when voltage detection signal corresponding to the output voltage with inverter is greater than reference voltage I, comparator U1 output low level, current transformer TA1 detects the output current of inverter, by being connected in parallel on the sample resistance R01 of current transformer TA1 secondary side, obtain the sampling voltage corresponding with the output current of inverter, after the rectification circuit II rectification being formed by rectifier diode D5, D6, D7 and D8, obtain the voltage detection signal corresponding with the output current of inverter, preferably, the in-phase input end that resistance R 02 and the diode D9 of voltage detection signal that should be corresponding with the output current of inverter by mutual series connection inputs to comparator U2, the in-phase input end that resistance R 02 and diode D10 by mutual series connection inputs to comparator U3 simultaneously, is convenient to realize the isolation of two paths of signals and be independent of each other, the reference voltage II that the inverting input input of comparator U2 consists of between power supply VCC and ground resistance R 16 and the mutual series connection of R17 produces the reference voltage II that circuit produces, the comparator U2 pair of voltage detection signal corresponding with the output current of inverter and reference voltage II compare, when voltage detection signal corresponding to the output current with inverter is greater than reference voltage II, comparator U2 exports high level, when voltage detection signal corresponding to the output current with inverter is less than reference voltage II, comparator U2 output low level, in like manner, comparator U3 output high level when voltage detection signal corresponding to the output current with inverter is greater than reference voltage III, comparator U3 output low level when voltage detection signal corresponding to the output current with inverter is less than reference voltage III, preferably, between the in-phase input end of comparator U2 and ground, be also provided with capacitor C parallel with one another 2, resistance R 15 and voltage stabilizing didoe Z2, between the in-phase input end of comparator U3 and ground, be also provided with capacitor C parallel with one another 1, resistance R 03 and voltage stabilizing didoe Z1, be convenient to the interference in the filtering voltage detection signal corresponding with the output current of inverter, and when voltage detection signal corresponding to the output current with inverter surpasses certain value, voltage stabilizing didoe Z1 and Z2 are operated in voltage stabilizing state, and comparator U2 and U3 are shielded, the anode of diode D13 and D14 is connected respectively comparator U1 output and comparator U2 output, and common cathode connects, common cathode limit is provided with pull down resistor R14 over the ground, when comparator U1 or the arbitrary comparator output of comparator U2 high level, or door be diode D13, the common cathode limit output high level of D14, the negative electrode of diode D11 and D12 is connected respectively comparator U3 output and diode D13, the common cathode limit of D14, and be total to anodic bonding, common anode limit is provided with pull-up resistor R07 over the ground, when or door and comparator U3 while exporting high level simultaneously, just export high level with door, when with door output high level, this high level signal is through the resistance R 08 driving switch pipe Q1 conducting of overdriving, because solenoid T1 one end connects power supply V by current-limiting resistance R10, other end connecting valve pipe Q1 drain electrode, described switching tube Q1 source electrode is connected with ground, therefore after switching tube Q1 conducting, solenoid T1 energising, preferably, solenoid T1 can be connected with the moving contact of air circuit by armature, during air circuit normal operation, moving contact and fixed contact adhesive, after solenoid T1 energising, armature just drives moving contact separated with fixed contact under the effect of electromagnetic attracting force, realize the disjunction of air circuit, preferably, disjunction control unit also comprises the sustained diode in parallel with solenoid T1 15, be convenient to when solenoid T1 is converted to power-off by energising, due to what solenoid had that perception produces, maintain the constant inverse electromotive force of self electric current and can utilize sustained diode 15 to discharge, preferably, the utility model also comprises resistance R 11 and the voltage stabilizing didoe Z3 of mutual series connection between power supply V and ground, described voltage stabilizing didoe Z3 negative electrode is as power supply VCC output, wherein power supply V is external power source, and it produces power supply VCC for solenoid provides electric current and passes through voltage stabilizing didoe Z3, preferably, the power supply VCC producing is 12V, and it provides working power for electronic circuit.
A kind of air circuit by electronic circuit control that the utility model provides, in the power supply unit that can be applied to be formed by civil power and inverter, wherein voltage detection unit, current detecting unit, comparing unit I, comparing unit II, comparing unit III or door, form with door, driver element and disjunction control unit the electronic circuit of controlling air circuit, when mains-supplied, disconnect being connected of described electronic circuit and air circuit, directly air circuit is serially connected in the feeding circuit of civil power, air circuit self completes the disjunction of load, when inverter is powered, by the disjunction of described electronic circuit control air circuit, air circuit is serially connected in the feeding circuit of inverter, the condition of realization when meeting the voltage detection signal corresponding with the output voltage of inverter simultaneously and be less than reference voltage I and while being greater than the condition of reference voltage III with voltage detection signal corresponding to the output current of inverter, or the condition when meeting the voltage detection signal corresponding with the output current of inverter simultaneously and being greater than reference voltage II and while being greater than the condition of reference voltage III with voltage detection signal corresponding to the output current of inverter, the disjunction of electronic circuit control air circuit, thereby can be under civil power and two kinds of conditions of power supply of inverter, all can effectively disjunction fault loop when there is overload or short trouble, and when generation single channel overload complete machine does not transship, by the output state of comparing unit II and comparing unit III, determined the disjunction of air circuit, when occurring to cause complete machine overload by single channel overload, by the output state of comparing unit I and comparing unit III, determined the disjunction of air circuit.The utility model is convenient and practical, safe and reliable, be not only convenient to produce, and cost is very cheap is suitable for extensive popularization.
The above; it is only preferably embodiment of the utility model; but protection range of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; according to the technical solution of the utility model and inventive concept thereof, be equal to replacement or changed, within all should being encompassed in protection range of the present utility model.

Claims (10)

1. by an air circuit for electronic circuit control, it is characterized in that comprising:
Receive the voltage input end of input voltage;
Receive the first current input terminal and second current input terminal of input current;
Connect voltage input end, for detection of input voltage size, also export the voltage detection unit of the voltage detection signal corresponding with input voltage;
Connect voltage detection unit, for the voltage detection signal corresponding with input voltage and the reference voltage I of voltage detection unit output are compared to rear output high level or low level comparing unit I;
Connect the first current input terminal and the second current input terminal, for detection of input current size, also export the current detecting unit of the voltage detection signal corresponding with input current;
Connect current detecting unit, for the voltage detection signal corresponding with input current and the reference voltage II of current detecting unit output are compared to rear output high level or low level comparing unit II;
Connect current detecting unit, for the voltage detection signal corresponding with input current and the reference voltage III of current detecting unit output are compared to rear output high level or low level comparing unit III;
Connect comparing unit I and comparing unit II, for the high level of comparing unit I and the output of comparing unit II or low level are carried out to logic OR computing or door;
Connection or gate output terminal and comparing unit III, for to or the high level exported of door and comparing unit III or low level carry out logic and operation with door;
Connect the driver element with gate output terminal;
Air circuit;
Connect driver element and air circuit, for the disjunction control unit of effective driving signal controlling air circuit disjunction of transmitting according to driver element.
2. a kind of air circuit by electronic circuit control according to claim 1, is characterized in that described voltage detection unit comprises:
Connect voltage input end, the rectification circuit I being formed by rectifier diode D1, D2, D3 and D4;
Connect rectification circuit I output, by the mutual bleeder circuit in series of resistance R 18, R19 and R20;
The optical coupler U4 that input is in parallel with resistance R 18.
3. a kind of air circuit by electronic circuit control according to claim 2, is characterized in that described comparing unit I comprises:
The reference voltage I consisting of between power supply VCC and ground resistance R 12 and the mutual series connection of R13 produces circuit;
Inverting input is connected with optical coupler U4 output, and in-phase input end produces with reference voltage I the comparator U1 that circuit is connected.
4. a kind of air circuit by electronic circuit control according to claim 1, is characterized in that described current detecting unit comprises:
Primary side is serially connected in the current transformer TA1 between the first current input terminal and the second current input terminal;
The sample resistance R01 in parallel with current transformer TA1 secondary side;
Connect current transformer TA1 secondary side, the rectification circuit II being formed by rectifier diode D5, D6, D7 and D8.
5. a kind of air circuit by electronic circuit control according to claim 4, is characterized in that described comparing unit II comprises:
The reference voltage II consisting of between power supply VCC and ground resistance R 16 and the mutual series connection of R17 produces circuit;
In-phase input end is connected with rectification circuit II output, and inverting input produces with reference voltage II the comparator U2 that circuit is connected;
Described comparing unit III comprises:
The reference voltage III consisting of between power supply VCC and ground resistance R 04, the mutual series connection of R05 produces circuit;
In-phase input end is connected with rectification circuit II output, and inverting input produces with reference voltage III the comparator U3 that circuit is connected.
6. according to a kind of air circuit by electronic circuit control described in claim 3 or 5, it is characterized in that described or door comprises:
Anode connects respectively comparator U1 output and comparator U2 output, diode D13 and D14 that common cathode connects;
The pull down resistor R14 being connected with the negative electrode of diode D13 and D14.
7. a kind of air circuit by electronic circuit control according to claim 6, is characterized in that describedly comprising with door:
Negative electrode connects respectively the common cathode limit of comparator U3 output and diode D13, D14, altogether diode D11 and the D12 of anodic bonding;
The pull-up resistor R07 being connected with the anode of diode D11 and D12.
8. a kind of air circuit by electronic circuit control according to claim 7, is characterized in that
Described disjunction control unit comprises switching tube Q1 and solenoid T1; Described solenoid T1 one end connects power supply V by current-limiting resistance R10, other end connecting valve pipe Q1 drain electrode; Described switching tube Q1 source electrode is connected with ground;
Described driver element comprises:
Be serially connected in the common anode limit of diode D11, D12 and the driving resistance R 08 between switching tube Q1 grid;
And be connected in the resistance R 09 between switching tube Q1 grid and source electrode.
9. a kind of air circuit by electronic circuit control according to claim 8, is characterized in that
Described voltage detection unit also comprises:
The capacitor C 4 in parallel with resistance R 18;
Be connected in parallel on the voltage stabilizing didoe Z4 at the series circuit two ends of resistance R 18 and R19 formation;
Described current detecting unit also comprises resistance R 02 and diode D9, D10; Described comparator U2 in-phase input end is connected with rectification circuit II output cathode with diode D9 by the resistance R 02 of mutual series connection; Described comparator U3 in-phase input end is connected with rectification circuit II output cathode with diode D10 by the resistance R 02 of mutual series connection;
Described comparing unit I also comprises and is connected in the capacitor C 3 between comparator U1 inverting input and ground;
Described comparing unit II also comprises in-phase input end and the capacitor C between ground 2, resistance R 15 and the voltage stabilizing didoe Z2 that is connected on comparator U2 parallel with one another;
Described comparing unit III also comprises in-phase input end and the capacitor C between ground 1, resistance R 03 and the voltage stabilizing didoe Z1 that is connected on comparator U3 parallel with one another;
Described disjunction control unit also comprises the sustained diode in parallel with solenoid T1 15;
The described air circuit by electronic circuit control also comprises resistance R 11 and the voltage stabilizing didoe Z3 of mutual series connection between power supply V and ground; Described voltage stabilizing didoe Z3 negative electrode is as power supply VCC output.
10. a kind of air circuit by electronic circuit control according to claim 8, characterized by further comprising the plug-in type connection terminal P1, the P2 that cooperatively interact; The output of described optical coupler U4 is connected with the inverting input of comparator U1 by plug-in type connection terminal P1, P2; The common anode limit of described diode D11, D12 is connected with driving resistance R 08 by plug-in type connection terminal P1, P2.
CN201320515798.4U 2013-08-20 2013-08-20 Air breaker controlled by electronic circuit Active CN203398751U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105486971A (en) * 2015-11-13 2016-04-13 浙江涵普电力科技有限公司 Short circuit and open circuit state detection circuit for secondary side winding of current transformer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105486971A (en) * 2015-11-13 2016-04-13 浙江涵普电力科技有限公司 Short circuit and open circuit state detection circuit for secondary side winding of current transformer

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