CN213185490U - Power failure detection circuit of intelligent capacitor - Google Patents
Power failure detection circuit of intelligent capacitor Download PDFInfo
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- CN213185490U CN213185490U CN202021931574.8U CN202021931574U CN213185490U CN 213185490 U CN213185490 U CN 213185490U CN 202021931574 U CN202021931574 U CN 202021931574U CN 213185490 U CN213185490 U CN 213185490U
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Abstract
The utility model discloses a power failure detection circuit of an intelligent capacitor, which comprises a voltage comparator circuit module, a reference power supply circuit module and a voltage division circuit module, wherein the voltage comparator circuit module comprises a chip U5, a plurality of resistors and a capacitor; the reference power supply circuit module comprises a voltage stabilizing chip TL1, a plurality of resistors and capacitors and provides a stable power supply for the voltage comparator circuit module; the voltage division circuit module comprises a plurality of resistors and provides input voltage for the voltage comparator circuit module. The utility model discloses the power failure detection circuit of intelligence electric capacity breaks down at electric power system, and during power interruption, can be very outstanding breaking completely, reaches protection intelligence capacitance compensation device's effect.
Description
Technical Field
The utility model relates to an intelligence electric capacity open-phase protection technical field, concretely relates to protection measuring circuit that detects power supply circuit falls electricity.
Background
The intelligent capacitor integrates advanced technologies such as modern measurement and control, power electronics, network communication, automatic control, power capacitors and the like. The control technology and the backward mechanical switching of the traditional reactive compensation are improved, and the traditional volume structure mode is changed, so that the new generation of intelligent reactive compensation equipment is smaller in volume and lower in power consumption. In the process of long-time use of the intelligent capacitor, the power system has faults, the power is interrupted, the intelligent capacitor cannot be completely disconnected and is in a closed state for a long time, over-compensation or damage to the intelligent capacitor compensation device is easily caused, and finally loss is brought to customers.
Open-phase protection circuits are typically provided to avoid this situation. In the prior art, the power failure protection of the intelligent capacitor adopts optical coupler isolation to send signals to a CPU for processing, so that the requirements on the sensitivity and the anti-interference capability of an optical coupler are higher. In the prior art, an optical coupler P785 is used for isolating an A phase and a B phase, and photoelectric signal change is realized after power failure, and the photoelectric signal changes from an output stage of the optical coupler to a CPU. However, the scheme causes incomplete disconnection after phase loss, and the sensitivity of the optical coupler is not high enough. Because the intelligent capacitor is applied to the environment with severe electromagnetic interference, once the intelligent capacitor is interfered, the intelligent capacitor cannot be completely disconnected, and cannot play a good power-down protection function.
Disclosure of Invention
In order to solve the technical problem, the utility model discloses a power failure detection circuit of an intelligent capacitor, which comprises a voltage comparator circuit module, a reference power supply circuit module and a voltage division circuit module, wherein the voltage comparator circuit module comprises a chip U5, a plurality of resistors and a capacitor; the reference power supply circuit module comprises a voltage stabilizing chip TL1, a plurality of resistors and capacitors and provides a stable power supply for the voltage comparator circuit module; the voltage division circuit module comprises a plurality of resistors and provides input voltage for the voltage comparator circuit module.
Further: the voltage comparator circuit module is characterized in that one end and an output end of a resistor R49 are connected to the outside of a pin 1 of a chip U5, the other end of a resistor R49 is connected with a 5V power supply, a 2.5V power supply and one end of a capacitor C55 are connected to the outside of a pin 2 of a chip U5, the other end of a capacitor C55 is a grounding GND end, one end of a capacitor C56 and one end of a capacitor C57 are connected to the outside of a pin 3 of the chip U5, the other end of the capacitor C56 and the other end of the capacitor C57 are connected with each other and are grounded together, the other end of a pin 4 of a chip U5 is grounded, the other end of a pin 8 of a chip U5 is connected with the 5V power supply, the chip U5 comprises an amplifier 1 and an amplifier 2, the output end of the amplifier 1 is connected to the pin 1 of the chip U5, the inverting input end of the amplifier 1 is connected to the pin 2 of the chip U, the inverting input of the amplifier 2 is connected to pin 6 of the chip U5, and the non-inverting output of the amplifier 2 is connected to pin 5 of the chip U5.
Further: the model of the chip U5 is LM393, the model of the R49 is 10K, the models of the capacitor C55 and the capacitor C57 are both 104F, and the model of the capacitor C56 is 10 UF.
Further: the voltage-stabilizing chip TL1 cathode of the reference power supply circuit module is connected with one end of a resistor R75, one end of a resistor R74, a 5V power supply and one end of a capacitor C54 at the same time, the other end of the capacitor C54 is a ground GND end, one end of a resistor R76 is connected to the reference electrode of the voltage-stabilizing chip TL1 at the other end of the resistor R75, and the anode of the resistor R76 and the anode of the voltage-stabilizing chip TL1 are connected and grounded GND end together.
Further: the model of the voltage-stabilizing chip TL1 is TL431, the model of the resistor R74 is 10K, the models of the resistor R75 and the resistor R76 are both 5.1K, and the model of the capacitor C54 is 10 UF.
Further: the voltage division circuit module comprises a resistor R57, a resistor R66 and a capacitor C53, one end of the resistor R57 is connected with one end of a resistor R66, the other end of the resistor R66 is connected with a GND end, the other end of the resistor R57 is connected with one end of a 5V power supply and one end of a capacitor C53, and the other end of the capacitor C53 is connected with the GND end.
Further: the type of the resistor R57 and the type of the resistor R66 are both 10K, and the type of the capacitor C53 is 10 UF.
Further: the voltage division circuit module comprises a resistor R72, a resistor R73 and a voltage stabilizing diode ZD1, one end of the resistor R72 is connected with one end of a resistor R73, the other end of the resistor R72 is connected with the anode of the voltage stabilizing diode ZD1, the cathode of the voltage stabilizing diode ZD1 is connected with a 23V power supply, and the other end of the resistor R73 is grounded at a GND end.
Further: the model of the voltage stabilizing diode ZD1 is W8, the model of the resistor R72 is 100K, and the model of the resistor R73 is 51K.
Has the advantages that: the utility model discloses the power failure detection circuit of intelligence electric capacity breaks down at electric power system, and during power interruption, can be very outstanding breaking completely, reaches protection intelligence capacitance compensation device's effect.
Drawings
Figure 1 is an overall circuit diagram of the present invention,
figure 2 is a circuit diagram of the voltage comparator circuit module of the present invention,
figure 3 is a circuit diagram of the reference power circuit module of the present invention,
figure 4 is a partial circuit diagram of the voltage divider circuit module of the present invention,
fig. 5 is a partial circuit diagram of the voltage divider circuit module of the present invention.
Detailed Description
The present invention will be further clarified by the following description with reference to the attached drawings and specific examples, which should be understood as being merely illustrative of the present invention and not limiting the scope of the present invention, and modifications of various equivalent forms of the present invention by those skilled in the art after reading the present invention, all fall within the scope defined by the appended claims of the present application.
As shown in fig. 1, the power failure detection circuit of the intelligent capacitor of the present invention comprises a voltage comparator circuit module, a reference power circuit module and a voltage dividing circuit module, wherein the voltage comparator circuit module comprises a chip U5, a plurality of resistors and a capacitor; the reference power supply circuit module comprises a voltage stabilizing chip TL1, a plurality of resistors and capacitors and provides a stable power supply for the voltage comparator circuit module; the voltage division circuit module comprises a plurality of resistors and provides input voltage for the voltage comparator circuit module.
As shown in fig. 2, one end and an output end of a resistor R49 are simultaneously connected to the outside of pin 1 of a chip U5 of the voltage comparator circuit module, the other end of a resistor R49 is connected to a 5V power supply, the outside of pin 2 of the chip U5 is simultaneously connected to a 2.5V power supply and one end of a capacitor C55, the other end of a capacitor C55 is a ground GND terminal, the outside of pin 3 of the chip U5 is simultaneously connected to one end of a capacitor C56 and one end of a capacitor C57, the other end of a capacitor C56 and the other end of a capacitor C57 are connected to each other and are grounded together, the outside ground GND terminal of pin 4 of the chip U5, the outside pin 8 of the chip U5 is connected to the 5V power supply, the chip U5 includes an amplifier 1 and an amplifier 2, the output end of the amplifier 1 is connected to pin 1 of the chip U5, the inverting input end of the amplifier 1 is connected to pin 2 of the chip U5, the inverting output end of the amplifier 1 is connected to pin 3, the in-common output of amplifier 2 is connected to pin 5 of chip U5. The model of the chip U5 is LM393, the model of R49 is 10K, the models of the capacitor C55 and the capacitor C57 are both 104F, and the model of the capacitor C56 is 10 UF.
As shown in fig. 3, the cathode of the voltage-stabilizing chip TL1 of the reference power circuit module is connected to one end of a resistor R75, one end of a resistor R74, a 5V power supply, and one end of a capacitor C54, the other end of the capacitor C54 is a ground GND terminal, the other end of the resistor R75 is connected to one end of a resistor R76 and is connected to the reference electrode of the voltage-stabilizing chip TL1, and the other end of the resistor R76 is connected to the anode of the voltage-stabilizing chip TL1 and is connected to the GND terminal. The model of the voltage-stabilizing chip TL1 is TL431, the model of the resistor R74 is 10K, the models of the resistor R75 and the resistor R76 are both 5.1K, and the model of the capacitor C54 is 10 UF.
As shown in fig. 4, the voltage divider circuit module includes a resistor R57, a resistor R66, and a capacitor C53, wherein one end of the resistor R57 is connected to one end of a resistor R66, the other end of the resistor R66 is connected to the GND terminal, the other end of the resistor R57 is connected to the 5V power supply and one end of a capacitor C53, and the other end of the capacitor C53 is connected to the GND terminal. The model of the resistor R57 and the model of the resistor R66 are both 10K, and the model of the capacitor C53 is 10 UF.
As shown in fig. 5, the voltage divider circuit module includes a resistor R72, a resistor R73, and a zener diode ZD1, wherein one end of the resistor R72 is connected to one end of the resistor R73, the other end of the resistor R72 is connected to the anode of the zener diode ZD1, the cathode of the zener diode ZD1 is connected to the 23V power supply, and the other end of the resistor R73 is connected to the GND terminal. The model of the voltage stabilizing diode ZD1 is W8, the model of the resistor R72 is 100K, and the model of the resistor R73 is 51K.
The utility model discloses the power failure detection circuit of intelligence electric capacity breaks down at electric power system, and during power interruption, can be very outstanding breaking completely, reaches protection intelligence capacitance compensation device's effect.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The utility model provides a power failure detection circuit of intelligence electric capacity which characterized in that: comprises a voltage comparator circuit module, a reference power circuit module and a voltage division circuit module,
the voltage comparator circuit module comprises a chip U5, a plurality of resistors and a capacitor; the voltage comparator circuit module is characterized in that one end and an output end of a resistor R49 are simultaneously connected to the outside of a pin 1 of a chip U5, the other end of a resistor R49 is connected with a 5V power supply, one end of a 2.5V power supply and one end of a capacitor C55 are simultaneously connected to the outside of a pin 2 of the chip U5, the other end of a capacitor C55 is a grounding GND end, one end of a capacitor C56 and one end of a capacitor C57 are simultaneously connected to the outside of a pin 3 of the chip U5, the other end of the capacitor C56 and the other end of the capacitor C57 are mutually connected and are grounded together, the other end of a pin 4 of the chip U5 is externally grounded, the pin 8 of the chip U5 is externally connected with the 5V power supply, the chip U5 comprises an amplifier 1 and an amplifier 2, the output end of the amplifier 1, the same-direction output end of the amplifier 1 is connected to a pin 3 of a chip U5, the output end of the amplifier 2 is connected to a pin 7 of a chip U5, the reverse input end of the amplifier 2 is connected to a pin 6 of a chip U5, and the same-direction output end of the amplifier 2 is connected to a pin 5 of a chip U5;
the reference power supply circuit module comprises a voltage stabilizing chip TL1, a plurality of resistors and capacitors and provides a stable power supply for the voltage comparator circuit module; the cathode of a voltage-stabilizing chip TL1 of the reference power supply circuit module is simultaneously connected with one end of a resistor R75, one end of a resistor R74, a 5V power supply and one end of a capacitor C54, the other end of the capacitor C54 is a grounding GND end, the other end of the resistor R75 is connected with one end of a resistor R76 and is connected to a reference electrode of a voltage-stabilizing chip TL1, and the other end of the resistor R76 is connected with the anode of a voltage-stabilizing chip TL1 and is connected to the GND end;
the voltage divider circuit module comprises a plurality of resistors and a resistor R72, a resistor R73 and a voltage stabilizing diode ZD1, wherein one end of the resistor R72 is connected with one end of a resistor R73, the other end of the resistor R72 is connected with the anode of the voltage stabilizing diode ZD1, the cathode of the voltage stabilizing diode ZD1 is connected with a 23V power supply, and the other end of the resistor R73 is grounded at a GND end.
2. The power failure detection circuit of the intelligent capacitor as claimed in claim 1, wherein: the model of the chip U5 is LM393, the model of the R49 is 10K, the models of the capacitor C55 and the capacitor C57 are both 104F, and the model of the capacitor C56 is 10 UF.
3. The power failure detection circuit of the intelligent capacitor as claimed in claim 1, wherein: the model of the voltage stabilizing chip TL1 is TL431, the model of the resistor R74 is 10K, the models of the resistor R75 and the resistor R76 are both 5.1K, and the model of the capacitor C54 is 10 UF.
4. The power failure detection circuit of the intelligent capacitor as claimed in claim 1, wherein: the voltage division circuit module comprises a resistor R57, a resistor R66 and a capacitor C53, one end of the resistor R57 is connected with one end of a resistor R66, the other end of the resistor R66 is connected with a GND end, the other end of the resistor R57 is connected with one end of a 5V power supply and one end of a capacitor C53, and the other end of the capacitor C53 is connected with the GND end.
5. The power failure detection circuit of the intelligent capacitor as claimed in claim 4, wherein: the type of the resistor R57 and the type of the resistor R66 are both 10K, and the type of the capacitor C53 is 10 UF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021931574.8U CN213185490U (en) | 2020-09-07 | 2020-09-07 | Power failure detection circuit of intelligent capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021931574.8U CN213185490U (en) | 2020-09-07 | 2020-09-07 | Power failure detection circuit of intelligent capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213185490U true CN213185490U (en) | 2021-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021931574.8U Active CN213185490U (en) | 2020-09-07 | 2020-09-07 | Power failure detection circuit of intelligent capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213185490U (en) |
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2020
- 2020-09-07 CN CN202021931574.8U patent/CN213185490U/en active Active
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