CN212256129U - Circuit for monitoring mechanical characteristics of circuit breaker and reference voltage generating circuit for monitoring - Google Patents
Circuit for monitoring mechanical characteristics of circuit breaker and reference voltage generating circuit for monitoring Download PDFInfo
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- CN212256129U CN212256129U CN202020871064.XU CN202020871064U CN212256129U CN 212256129 U CN212256129 U CN 212256129U CN 202020871064 U CN202020871064 U CN 202020871064U CN 212256129 U CN212256129 U CN 212256129U
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Abstract
The utility model discloses a circuit breaker mechanical characteristic monitoring circuit and monitoring are with reference voltage production circuit, reference voltage production circuit includes: the circuit breaker comprises a reference voltage generating chip, a reference voltage generating circuit and a control circuit, wherein the reference voltage generating chip generates a reference voltage signal according to the mechanical characteristics of the circuit breaker and outputs the reference voltage signal through a reference voltage output end in the reference voltage generating chip; the analog-to-digital converter comprises a reference voltage input end, and receives a reference voltage signal through the reference voltage input end; and the in-phase input end and the output end of the in-phase amplifying circuit are connected with the reference voltage input end. The utility model discloses a voltage feedback of reference voltage input end to inverting input end adjusts adc and reference voltage and produces the voltage feedback between the chip, maintains reference voltage signal's stability, avoids the quantization distortion, and the error elimination has realized the accurate purpose that acquires circuit breaker mechanical characteristic monitoring data.
Description
Technical Field
The utility model relates to a circuit field is produced with reference voltage to circuit breaker mechanical characteristic monitoring, concretely relates to circuit breaker mechanical characteristic monitoring circuit and monitoring are with reference voltage production circuit.
Background
With the rapid development of electric power industry and the rapid advance of electric power automation systems in China, the regular maintenance work of power supply equipment of the electric power system is not more and more suitable for the actual needs of electric power production. The online monitoring of the equipment state is gradually introduced into the field of power system production research.
The breaker is an important executive component of the power system, is a large-scale power device which is only second to a generator and a transformer, completes switching operation when the breaker is normally operated, and accesses the device or a line into a power grid or quits the operation to play a role in operation control; when equipment and a line have faults, the fault line can be quickly cut off, normal operation of a fault-free part is ensured, and the operation protection effect is achieved. However, the circuit breaker is also an important power device with the most frequent failure, maintenance and parameter measurement, and has a high failure rate in the operation process, which easily causes grid accidents and causes large economic loss, so that a very high requirement is provided for the reliability of the circuit breaker.
In the prior art, in order to detect the mechanical characteristics of the circuit breaker, a reference voltage generating chip is often used to sample according to the mechanical characteristics of the circuit breaker and generate a reference voltage according to the sampled data, the reference voltage is directly input to an analog-to-digital converter, and the analog-to-digital converter quantizes the input voltage according to the reference voltage. However, due to the reasons of on-board noise, current surge and the like, there is a certain voltage fluctuation between the voltage received by the analog-to-digital converter and the reference voltage output by the reference voltage chip, which causes quantization distortion and introduces errors, so that it is difficult to achieve the purpose of accurately acquiring the mechanical characteristic monitoring data of the circuit breaker.
SUMMERY OF THE UTILITY MODEL
The utility model provides a be not enough to above-mentioned prior art, an object of the utility model is to provide a circuit breaker mechanical properties monitoring circuit and reference voltage for monitoring produce the circuit, set up cophase amplifier circuit in the circuit, be connected cophase amplifier circuit's inverting input end and analog-to-digital converter, voltage feedback through reference voltage input end to inverting input end, adjust analog-to-digital converter and reference voltage and produce the voltage feedback between the chip, maintain reference voltage signal's stability, avoid the quantization distortion, the error is eliminated, the accurate mesh that acquires circuit breaker mechanical properties monitoring data has been realized.
In order to achieve the above object, the utility model provides a circuit is produced to reference voltage for monitoring of circuit breaker mechanical properties, reference voltage produces the circuit and includes:
the reference voltage generating chip generates a reference voltage signal according to the mechanical characteristic of the circuit breaker and outputs the reference voltage signal through a reference voltage output end in the reference voltage generating chip;
an analog-to-digital converter comprising a reference voltage input, the analog-to-digital converter receiving the reference voltage signal through the reference voltage input;
and the in-phase input end of the in-phase amplifying circuit is connected with the reference voltage output end, and the reverse phase input end and the output end of the in-phase amplifying circuit are connected with the reference voltage input end.
Furthermore, the reference voltage generating circuit further comprises a first routing resistor, and two ends of the first routing resistor are respectively connected with the output end and the reference voltage input end.
Furthermore, the reference voltage generating circuit further comprises a second routing resistor, and two ends of the second routing resistor are respectively connected with the inverting input terminal and the reference voltage input terminal.
Further, the gain of the in-phase amplification circuit is 1.
Furthermore, the reference voltage generating chip, the in-phase amplifying circuit and the analog-to-digital converter are arranged on the PCB, and are respectively connected with the reference voltage generating chip and the analog-to-digital converter through PCB wiring by the in-phase amplifying circuit.
Based on the same inventive concept, the utility model also provides a circuit breaker mechanical characteristics monitoring circuit, circuit breaker mechanical characteristics monitoring circuit includes circuit breaker mechanical characteristics monitoring and produces the circuit with reference voltage, reference voltage produces the circuit and includes:
the reference voltage generating chip generates a reference voltage signal according to the mechanical characteristic of the circuit breaker and outputs the reference voltage signal through a reference voltage output end in the reference voltage generating chip;
an analog-to-digital converter comprising a reference voltage input, the analog-to-digital converter receiving the reference voltage signal through the reference voltage input;
and the in-phase input end of the in-phase amplifying circuit is connected with the reference voltage output end, and the reverse phase input end and the output end of the in-phase amplifying circuit are connected with the reference voltage input end.
Furthermore, the reference voltage generating circuit further comprises a first routing resistor, and two ends of the first routing resistor are respectively connected with the output end and the reference voltage input end.
Furthermore, the reference voltage generating circuit further comprises a second routing resistor, and two ends of the second routing resistor are respectively connected with the inverting input terminal and the reference voltage input terminal.
Further, the gain of the in-phase amplification circuit is 1.
Furthermore, the reference voltage generating chip, the in-phase amplifying circuit and the analog-to-digital converter are arranged on the PCB, and are respectively connected with the reference voltage generating chip and the analog-to-digital converter through PCB wiring by the in-phase amplifying circuit.
Compared with the prior art, the utility model discloses beneficial effect according to down has:
the utility model discloses a circuit breaker mechanical characteristics monitoring circuit and reference voltage for monitoring produce the circuit, set up cophase amplifier circuit in the circuit, be connected cophase amplifier circuit's inverting input end and analog-to-digital converter, through the voltage feedback of reference voltage input end to inverting input end, adjust analog-to-digital converter and reference voltage and produce the voltage feedback between the chip, maintain reference voltage signal's stability, avoid the quantization distortion, the error elimination has realized the accurate mesh that acquires circuit breaker mechanical characteristics monitoring data.
Drawings
Fig. 1 is a circuit diagram of an embodiment of a reference voltage generating circuit for monitoring mechanical characteristics of a circuit breaker according to the present invention;
fig. 2 is a structural diagram of an embodiment of the circuit breaker mechanical characteristic monitoring circuit of the present invention;
fig. 3 is a circuit diagram of an embodiment of a reference voltage generating circuit for monitoring mechanical characteristics of the circuit breaker of fig. 2.
Detailed Description
Exemplary embodiments that embody features and advantages of the present invention are described in detail in the foregoing specification. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.
The present invention will be further explained with reference to the drawings and the embodiments.
Referring to fig. 1, fig. 1 is a circuit diagram of an embodiment of the reference voltage generating circuit for monitoring mechanical characteristics of a circuit breaker of the present invention, which is described in detail with reference to fig. 1.
In this embodiment, the reference voltage generating circuit for monitoring mechanical characteristics of a circuit breaker includes: the circuit breaker comprises a reference voltage generating chip, a reference voltage generating circuit and a control circuit, wherein the reference voltage generating chip generates a reference voltage signal according to the mechanical characteristics of the circuit breaker and outputs the reference voltage signal through a reference voltage output end in the reference voltage generating chip; the analog-to-digital converter comprises a reference voltage input end, and receives a reference voltage signal through the reference voltage input end; and the in-phase input end and the output end of the in-phase amplifying circuit are connected with the reference voltage input end.
In this embodiment, the mechanical characteristics of the circuit breaker include parameters representing the mechanical characteristics of the circuit breaker, such as switching-on/off time, speed, stroke, opening distance, synchronization, bounce, and the like, and the reference voltage generating chip is a chip or other device capable of sampling the parameters and generating a reference voltage signal related to a sampling result in the prior art, and is not limited herein.
In this embodiment, the reference voltage generating circuit further includes a first routing resistor R2, and two ends of the first routing resistor R2 are respectively connected to the output terminal and the reference voltage input terminal.
In this embodiment, the reference voltage generating circuit further includes a second routing resistor R1, and two ends of the second routing resistor R1 are respectively connected to the inverting input terminal and the reference voltage input terminal.
In this embodiment, the gain of the in-phase amplifier circuit is 1.
In this embodiment, the reference voltage generating chip, the in-phase amplifying circuit and the analog-to-digital converter are disposed on the PCB, and are respectively connected to the reference voltage generating chip and the analog-to-digital converter through the PCB traces via the in-phase amplifying circuit.
In other embodiments, the reference voltage generating chip, the in-phase amplifying circuit and the analog-to-digital converter may also be partially disposed on the PCB, or may not be disposed on the PCB, and only the in-phase amplifying circuit may be connected to the reference voltage generating chip and the analog-to-digital converter, respectively, without limitation.
The following is right through the concrete operating principle of the reference voltage generating circuit for monitoring the mechanical characteristics of the circuit breaker the utility model discloses a reference voltage generating circuit for monitoring the mechanical characteristics of the circuit breaker is further explained.
The output end of the in-phase amplifying circuit is connected to the reference voltage input end of the analog-to-digital converter through a PCB (printed circuit board) wire, and the reference voltage input end of the analog-to-digital converter is fed back to the inverting input end of the in-phase amplifying circuit through the PCB wire.
Specifically, the specific implementation flow of the reference voltage generating circuit of the present invention is as follows:
in a specific implementation flow, the voltage of the reference voltage output end is represented by Vref _ out, the voltages of the non-inverting input end and the inverting input end are represented by Vr and Vn respectively, the voltage of the output end is represented by Vo, the voltage of the reference voltage input end is represented by Vref _ in, and the voltage at the intersection point of the line where the first trace resistor R1 is located and the line where the second trace resistor R1 is located is represented by Vri.
A feedback loop is added between the reference voltage generation chip and a reference voltage input end of the analog-digital converter. The feedback loop monitors the voltage Vri at the reference voltage input end of the analog-to-digital converter in real time. And the voltage is fed back to the inverting input end of the in-phase amplifying circuit through the PCB wiring. Because the input impedance of the in-phase amplifying circuit is extremely high, the input current of the in-phase amplifying circuit is extremely small, and the voltage drop of the voltage Vri on the routing circuit R2 is almost zero, that is, Vn is Vri.
Once the current surges, the voltage drop generated by the second trace resistor R1R1 or the PCB trace connecting the output terminal and the reference voltage input terminal becomes large, resulting in Vri < Vr. According to the operating principle of the in-phase amplifying circuit, Vo is a (Vr-Vn), and because Vn is Vri, that is, Vo is a (Vr-Vri) positive, Vo will change to the positive voltage rail of the voltage because of the open-loop gain a of the in-phase amplifying circuit, that is, Vri will change to the positive voltage rail of the voltage until Vri is Vr, and the change trend stops.
Once Vri > Vr is caused by the disturbance, according to the operating principle of the in-phase amplifying circuit, Vo is equal to a (Vr-Vn), and because Vn is equal to Vri, that is, Vo is equal to a (Vr-Vri) and is negative, Vo will change to the negative voltage rail of the voltage because of the open-loop gain a of the in-phase amplifying circuit, that is, Vri will change to the negative power rail, and until Vri is equal to Vr, the change trend stops.
Therefore, once the reference voltage input voltage Vri of the analog-to-digital converter is not equal to the output Vr of the reference voltage chip, the reference voltage generation circuit automatically adjusts the Vri to Vr, provides a stable reference voltage for the analog-to-digital converter, and ensures high-precision acquisition of the circuit.
Has the advantages that: the utility model discloses a circuit breaker reference voltage for mechanical characteristics monitoring produces the circuit and sets up cophase amplifier circuit in the circuit, is connected cophase amplifier circuit's inverting input end and adc, through the voltage feedback of reference voltage input end to inverting input end, adjusts adc and reference voltage and produces the voltage feedback between the chip, maintains reference voltage signal's stability, avoids the quantization distortion, and the elimination error has realized the accurate mesh that acquires circuit breaker mechanical characteristics monitoring data.
Based on the same inventive concept, the present invention further provides a circuit breaker mechanical characteristic monitoring circuit, please refer to fig. 2 and fig. 3, fig. 2 is a structure diagram of an embodiment of the circuit breaker mechanical characteristic monitoring circuit of the present invention; fig. 3 is a circuit diagram of an embodiment of a reference voltage generating circuit for monitoring mechanical characteristics of the circuit breaker of fig. 2. The circuit breaker mechanical characteristic monitoring circuit of the present invention is described in detail with reference to fig. 2 and 3.
In this embodiment, the circuit breaker mechanical characteristic monitoring circuit includes a reference voltage generating circuit for circuit breaker mechanical characteristic monitoring, the reference voltage generating circuit including: the circuit breaker comprises a reference voltage generating chip, a reference voltage generating circuit and a control circuit, wherein the reference voltage generating chip generates a reference voltage signal according to the mechanical characteristics of the circuit breaker and outputs the reference voltage signal through a reference voltage output end in the reference voltage generating chip; the analog-to-digital converter comprises a reference voltage input end, and receives a reference voltage signal through the reference voltage input end; and the in-phase input end and the output end of the in-phase amplifying circuit are connected with the reference voltage input end.
In this embodiment, the mechanical characteristics of the circuit breaker include parameters representing the mechanical characteristics of the circuit breaker, such as switching-on/off time, speed, stroke, opening distance, synchronization, bounce, and the like, and the reference voltage generating chip is a chip or other device capable of sampling the parameters and generating a reference voltage signal related to a sampling result in the prior art, and is not limited herein.
In this embodiment, the reference voltage generating circuit further includes a first routing resistor R2, and two ends of the first routing resistor R2 are respectively connected to the output terminal and the reference voltage input terminal.
In this embodiment, the reference voltage generating circuit further includes a second routing resistor R1R1, and two ends of the second routing resistor R1R1 are respectively connected to the inverting input terminal and the reference voltage input terminal.
In this embodiment, the gain of the in-phase amplifier circuit is 1.
In this embodiment, the reference voltage generating chip, the in-phase amplifying circuit and the analog-to-digital converter are disposed on the PCB, and are respectively connected to the reference voltage generating chip and the analog-to-digital converter through the PCB traces via the in-phase amplifying circuit.
In other embodiments, the reference voltage generating chip, the in-phase amplifying circuit and the analog-to-digital converter may also be partially disposed on the PCB, or may not be disposed on the PCB, and only the in-phase amplifying circuit may be connected to the reference voltage generating chip and the analog-to-digital converter, respectively, without limitation.
The following is right through the concrete operating principle of the reference voltage generating circuit for monitoring the mechanical characteristics of the circuit breaker the utility model discloses a reference voltage generating circuit for monitoring the mechanical characteristics of the circuit breaker is further explained.
The output end of the in-phase amplifying circuit is connected to the reference voltage input end of the analog-to-digital converter through a PCB (printed circuit board) wire, and the reference voltage input end of the analog-to-digital converter is fed back to the inverting input end of the in-phase amplifying circuit through the PCB wire.
Specifically, the specific implementation flow of the reference voltage generating circuit of the present invention is as follows:
in a specific implementation flow, the voltage of the reference voltage output end is represented by Vref _ out, the voltages of the non-inverting input end and the inverting input end are represented by Vr and Vn respectively, the voltage of the output end is represented by Vo, the voltage of the reference voltage input end is represented by Vref _ in, and the voltage at the intersection point of the line where the first trace resistor R1 is located and the line where the second trace resistor R1 is located is represented by Vri.
A feedback loop is added between the reference voltage generation chip and a reference voltage input end of the analog-digital converter. The feedback loop monitors the voltage Vri at the reference voltage input end of the analog-to-digital converter in real time. And the voltage is fed back to the inverting input end of the in-phase amplifying circuit through the PCB wiring. Because the input impedance of the in-phase amplifying circuit is extremely high, the input current of the in-phase amplifying circuit is extremely small, and the voltage drop of the voltage Vri on the routing circuit R2 is almost zero, that is, Vn is Vri.
Once the current surges, the voltage drop generated by the second trace resistor R1R1 or the PCB trace connecting the output terminal and the reference voltage input terminal becomes large, resulting in Vri < Vr. According to the operating principle of the in-phase amplifying circuit, Vo is a (Vr-Vn), and because Vn is Vri, that is, Vo is a (Vr-Vri) positive, Vo will change to the positive voltage rail of the voltage because of the open-loop gain a of the in-phase amplifying circuit, that is, Vri will change to the positive voltage rail of the voltage until Vri is Vr, and the change trend stops.
Once Vri > Vr is caused by the disturbance, according to the operating principle of the in-phase amplifying circuit, Vo is equal to a (Vr-Vn), and because Vn is equal to Vri, that is, Vo is equal to a (Vr-Vri) and is negative, Vo will change to the negative voltage rail of the voltage because of the open-loop gain a of the in-phase amplifying circuit, that is, Vri will change to the negative power rail, and until Vri is equal to Vr, the change trend stops.
Therefore, once the reference voltage input voltage Vri of the analog-to-digital converter is not equal to the output Vr of the reference voltage chip, the reference voltage generation circuit automatically adjusts the Vri to Vr, provides a stable reference voltage for the analog-to-digital converter, and ensures high-precision acquisition of the circuit.
Has the advantages that: the utility model discloses a circuit breaker mechanical characteristic monitoring circuit sets up cophase amplifier circuit in the circuit, is connected cophase amplifier circuit's inverting input end and analog to digital converter, through the voltage feedback of reference voltage input end to inverting input end, adjusts analog to digital converter and reference voltage and produces the voltage feedback between the chip, maintains reference voltage signal's stability, avoids the quantization distortion, and the elimination error has realized the purpose that the accuracy acquireed circuit breaker mechanical characteristic monitoring data.
While the present invention has been described with reference to exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. A reference voltage generating circuit for monitoring mechanical characteristics of a circuit breaker, said reference voltage generating circuit comprising:
the reference voltage generating chip generates a reference voltage signal according to the mechanical characteristic of the circuit breaker and outputs the reference voltage signal through a reference voltage output end in the reference voltage generating chip;
an analog-to-digital converter comprising a reference voltage input, the analog-to-digital converter receiving the reference voltage signal through the reference voltage input;
and the in-phase input end of the in-phase amplifying circuit is connected with the reference voltage output end, and the reverse phase input end and the output end of the in-phase amplifying circuit are connected with the reference voltage input end.
2. The reference voltage generating circuit for monitoring mechanical characteristics of a circuit breaker according to claim 1, wherein said reference voltage generating circuit further comprises a first routing resistor, and two ends of said first routing resistor are respectively connected to said output terminal and said reference voltage input terminal.
3. The reference voltage generating circuit for monitoring mechanical characteristics of a circuit breaker according to claim 1, wherein said reference voltage generating circuit further comprises a second routing resistor, and two ends of said second routing resistor are respectively connected to said inverting input terminal and said reference voltage input terminal.
4. The reference voltage generating circuit for monitoring mechanical characteristics of a circuit breaker according to claim 1, wherein the gain of said in-phase amplifying circuit is 1.
5. The reference voltage generating circuit for monitoring mechanical characteristics of a circuit breaker according to claim 1, wherein the reference voltage generating chip, the in-phase amplifying circuit and the analog-to-digital converter are disposed on a PCB, and the in-phase amplifying circuit is connected to the reference voltage generating chip and the analog-to-digital converter through PCB traces.
6. A circuit breaker mechanical characteristic monitoring circuit comprising a reference voltage generating circuit for circuit breaker mechanical characteristic monitoring, the reference voltage generating circuit comprising:
the reference voltage generating chip generates a reference voltage signal according to the mechanical characteristic of the circuit breaker and outputs the reference voltage signal through a reference voltage output end in the reference voltage generating chip;
an analog-to-digital converter comprising a reference voltage input, the analog-to-digital converter receiving the reference voltage signal through the reference voltage input;
and the in-phase input end of the in-phase amplifying circuit is connected with the reference voltage output end, and the reverse phase input end and the output end of the in-phase amplifying circuit are connected with the reference voltage input end.
7. The circuit breaker mechanical characteristic monitoring circuit of claim 6, wherein the reference voltage generating circuit further comprises a first trace resistor, and two ends of the first trace resistor are respectively connected to the output terminal and the reference voltage input terminal.
8. The circuit breaker mechanical characteristic monitoring circuit of claim 6, wherein the reference voltage generating circuit further comprises a second routing resistor, and two ends of the second routing resistor are respectively connected to the inverting input terminal and the reference voltage input terminal.
9. The circuit breaker mechanical characteristic monitoring circuit of claim 6 wherein the gain of the in-phase amplification circuit is 1.
10. The circuit breaker mechanical characteristic monitoring circuit of claim 6, wherein the reference voltage generating chip, the in-phase amplifying circuit and the analog-to-digital converter are disposed on a PCB, and the reference voltage generating chip and the analog-to-digital converter are respectively connected through PCB traces by the in-phase amplifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020871064.XU CN212256129U (en) | 2020-05-21 | 2020-05-21 | Circuit for monitoring mechanical characteristics of circuit breaker and reference voltage generating circuit for monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020871064.XU CN212256129U (en) | 2020-05-21 | 2020-05-21 | Circuit for monitoring mechanical characteristics of circuit breaker and reference voltage generating circuit for monitoring |
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| Publication Number | Publication Date |
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| CN212256129U true CN212256129U (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020871064.XU Active CN212256129U (en) | 2020-05-21 | 2020-05-21 | Circuit for monitoring mechanical characteristics of circuit breaker and reference voltage generating circuit for monitoring |
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| CN (1) | CN212256129U (en) |
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- 2020-05-21 CN CN202020871064.XU patent/CN212256129U/en active Active
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