CN218070994U - Low-voltage early warning protector circuit - Google Patents
Low-voltage early warning protector circuit Download PDFInfo
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- CN218070994U CN218070994U CN202222371302.2U CN202222371302U CN218070994U CN 218070994 U CN218070994 U CN 218070994U CN 202222371302 U CN202222371302 U CN 202222371302U CN 218070994 U CN218070994 U CN 218070994U
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Abstract
The utility model discloses a low pressure early warning protector circuit relates to equipment safety field, and this low pressure early warning protector circuit includes: the power supply module is used for supplying direct current to supply power for the equipment working module; the equipment working module is used for driving equipment to work by obtaining electricity; the sampling voltage module is used for sampling the voltage output to the equipment working module by the power supply module and outputting the voltage to the undervoltage detection module; the reference voltage module is used for converting the output voltage of the power supply module into a reference voltage and outputting the reference voltage to the undervoltage detection module, and meanwhile, the reference voltage supplies power to the early warning processing module; undervoltage detection module for compare sampling voltage and reference voltage, compare with prior art, the beneficial effects of the utility model are that: the utility model discloses an under-voltage detection module detects whether power supply module is under-voltage to sampling voltage and reference voltage's judgement to early warning processing module continuous work when guaranteeing under-voltage through the silicon controlled rectifier guarantees that the user learns under-voltage information.
Description
Technical Field
The utility model relates to an equipment safety field specifically is a low pressure early warning protector circuit.
Background
When the equipment works by electricity, the service life of the equipment is easily shortened due to overhigh voltage, the equipment is damaged seriously, the equipment works by overlow voltage and does not reach the rated voltage, and the working result is difficult to guarantee.
The existing low-voltage detection protection circuit usually receives trigger voltage through an MOS (metal oxide semiconductor) tube, a triode and the like, so that equipment early warning is realized at low voltage, normal work is recovered when the voltage is normal, and fault information can be missed when a user is not beside the low-voltage detection protection circuit, and improvement is needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low pressure early warning protector circuit to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a low-voltage early warning protector circuit comprising:
the power supply module is used for supplying direct current to supply power for the equipment working module;
the equipment working module is used for driving equipment to work by obtaining electricity;
the sampling voltage module is used for sampling the voltage output to the equipment working module by the power supply module and outputting the voltage to the undervoltage detection module;
the reference voltage module is used for converting the output voltage of the power supply module into a reference voltage and outputting the reference voltage to the undervoltage detection module, and meanwhile, the reference voltage supplies power to the early warning processing module;
the under-voltage detection module is used for comparing the sampling voltage with the reference voltage and controlling the early warning processing module to work when the sampling voltage is lower than the reference voltage;
the early warning processing module is used for disconnecting a line for supplying power to the equipment working module by the power supply module and sounding and giving out light to alarm when the early warning processing module works;
the power supply module is connected with the sampling voltage module, the reference voltage module and the equipment working module, the sampling voltage module is connected with the under-voltage detection module, the reference voltage module is connected with the under-voltage detection module and the early warning processing module, the under-voltage detection module is connected with the early warning processing module, and the early warning processing module is connected with the equipment working module.
As a further aspect of the present invention: the sampling voltage module comprises a resistor R1 and a resistor R2, one end of the resistor R1 is connected with the power supply module, the other end of the resistor R1 is connected with the resistor R2 and the under-voltage detection module, and the other end of the resistor R2 is grounded.
As the utility model discloses further scheme again: the reference voltage module includes electric capacity C1, stabiliser U1, diode D1, resistance R3, potentiometre RP1, electric capacity C2, diode D2, switch S1, stabiliser U1 ' S input is connected to electric capacity C1 ' S one end, the power module, diode D1 ' S negative pole, electric capacity C1 ' S other end ground connection, stabiliser U1 ' S earthing terminal connecting resistance R3, potentiometre RP1, diode D2 ' S positive pole, electric capacity C2, potentiometre RP1 ' S other end ground connection, electric capacity C2 ' S other end ground connection, diode D2 ' S negative pole is connected to resistance R3 ' S the other end, stabiliser U1 ' S output, diode D1 ' S positive pole, switch S1, undervoltage detection module is connected to switch S1 ' S the other end, the early warning processing module.
As the utility model discloses further scheme again: the undervoltage detection module comprises an amplifier U2, a silicon controlled rectifier Z1 and a resistor R4, the inverting end of the amplifier U2 is connected with a sampling voltage module, the inverting end of the amplifier U2 is connected with a reference voltage module, the output end of the amplifier U2 is connected with the control electrode of the silicon controlled rectifier Z1, the positive electrode of the silicon controlled rectifier Z1 is connected with the reference voltage module, the negative electrode of the silicon controlled rectifier Z1 is connected with the resistor R4, and the other end of the resistor R4 is connected with an early warning processing module.
As a further aspect of the present invention: the early warning processing module comprises a triode V1, a triode V2, a diode D4, a resistor R5, a relay J, a diode D3, a switch S3, a buzzer SPEAKER, the base of the triode V1 is connected with the undervoltage detection module, the collector of the triode V1 is connected with the resistor R5, the other end of the resistor R5 is connected with the reference voltage module, the relay J, the cathode of the diode D3, the switch S3, the base of the triode V2 is connected with the emitter of the triode V1, the anode of the diode D4 is connected with the emitter of the triode V2, the cathode of the diode D4 is grounded, the collector of the triode V2 is connected with the other end of the relay J, the anode of the diode D3, and the other end of the switch S3 is grounded through the buzzer SPEAKER.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an undervoltage detection module detects whether power supply module supply voltage is undervoltage to sampling voltage and reference voltage's judgement to the warning processing module continuous work when guaranteeing undervoltage through the silicon controlled rectifier, guarantees that the user learns undervoltage information.
Drawings
Fig. 1 is a schematic diagram of a low-voltage early warning protector circuit.
Fig. 2 is a circuit diagram of a low-voltage early warning protector circuit.
Fig. 3 is a pin diagram of LM 317.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.
Referring to fig. 1, a low voltage warning protector circuit includes:
the power supply module is used for supplying direct current to supply power for the equipment working module;
the equipment working module is used for driving equipment to work by obtaining electricity;
the sampling voltage module is used for sampling the voltage output to the equipment working module by the power supply module and outputting the voltage to the undervoltage detection module;
the reference voltage module is used for converting the output voltage of the power supply module into a reference voltage and outputting the reference voltage to the undervoltage detection module, and meanwhile, the reference voltage supplies power to the early warning processing module;
the under-voltage detection module is used for comparing the sampling voltage with the reference voltage and controlling the early warning processing module to work when the sampling voltage is lower than the reference voltage;
the early warning processing module is used for disconnecting a line for supplying power to the equipment working module by the power supply module and sounding and giving out light to alarm when the early warning processing module works;
the power supply module is connected with the sampling voltage module, the reference voltage module and the equipment working module, the sampling voltage module is connected with the under-voltage detection module, the reference voltage module is connected with the under-voltage detection module and the early warning processing module, the under-voltage detection module is connected with the early warning processing module, and the early warning processing module is connected with the equipment working module.
In a specific embodiment: the direct current supplied by the power supply module can be directly supplied by a battery and can also be converted from alternating current; and the equipment working module controls the equipment to work after being electrified.
In this embodiment: referring to fig. 2, the voltage sampling module includes a resistor R1 and a resistor R2, one end of the resistor R1 is connected to the power supply module, the other end of the resistor R1 is connected to the resistor R2 and the under-voltage detection module, and the other end of the resistor R2 is grounded.
The output voltage of the power supply module is the sum of the voltages of the resistor R1 and the resistor R2, so that the voltage of the resistor R2 can be collected to feed back the output voltage of the power supply module.
In this embodiment: referring to fig. 2 and fig. 3, the reference voltage module includes a capacitor C1, a voltage regulator U1, a diode D1, a resistor R3, a potentiometer RP1, a capacitor C2, a diode D2, and a switch S1, one end of the capacitor C1 is connected to an input end of the voltage regulator U1, a power supply module, a cathode of the diode D1, the other end of the capacitor C1 is grounded, a ground terminal of the voltage regulator U1 is connected to the resistor R3, the potentiometer RP1, an anode of the diode D2, the capacitor C2, the other end of the potentiometer RP1 is grounded, the other end of the capacitor C2 is grounded, the other end of the resistor R3 is connected to a cathode of the diode D2, an output end of the voltage regulator U1, an anode of the diode D1, the switch S1, and the other end of the switch S1 is connected to an under-voltage detection module and an early warning processing module.
The voltage stabilizer U1 is LM317, is one of the most widely used power integrated circuits, has the simplest form of a fixed three-terminal voltage stabilizing circuit, and has the characteristic of adjustable output voltage. The voltages of the ground terminal and the output terminal are constant, so that the resistance value of the potentiometer RP1 is adjusted, and the output reference voltage can be changed.
In this embodiment: referring to fig. 2, the undervoltage detection module includes an amplifier U2, a thyristor Z1, and a resistor R4, wherein an inverting terminal of the amplifier U2 is connected to the sampling voltage module, a non-inverting terminal of the amplifier U2 is connected to the reference voltage module, an output terminal of the amplifier U2 is connected to a control electrode of the thyristor Z1, an anode of the thyristor Z1 is connected to the reference voltage module, a cathode of the thyristor Z1 is connected to the resistor R4, and the other end of the resistor R4 is connected to the early warning processing module.
The amplifier U2 is used as a comparator, compares the reference voltage (a proper reference voltage is obtained by adjusting the potentiometer RP 1) with the sampling voltage, when the output voltage of the power supply module is normal, the sampling voltage is greater than the reference voltage, the amplifier U1 outputs a low level, when the output voltage of the power supply module is abnormal, the sampling voltage is less than the reference voltage, the amplifier U1 outputs a high level, the thyristor Z1 is triggered to be switched on, and then the early warning processing module works.
In this embodiment: referring to fig. 2, the early warning processing module includes a transistor V1, a transistor V2, a diode D4, a resistor R5, a relay J, a diode D3, a switch S3, and a buzzer SPEAKER, wherein a base of the transistor V1 is connected to the under-voltage detection module, a collector of the transistor V1 is connected to the resistor R5, the other end of the resistor R5 is connected to the reference voltage module, the relay J, a cathode of the diode D3, and the switch S3, an emitter of the transistor V1 is connected to the base of the transistor V2, an emitter of the transistor V2 is connected to an anode of the diode D4, a cathode of the diode D4 is grounded, a collector of the transistor V2 is connected to the other end of the relay J and the anode of the diode D3, and the other end of the switch S3 is grounded through the buzzer SPEAKER.
Silicon controlled rectifier Z1 switches on the back, triode V1 switches on, and then triode V2 switches on, relay J gets electric work, switch S2 of control normally closed, switch S3 that normally opens becomes switch S2 disconnection, switch S3 is closed, make equipment work module outage not work, emitting diode D4 is luminous to be instructed, bee calling organ SPEAKER reports to the police, remind the user, anodal voltage lasts to be higher than the negative voltage after silicon controlled rectifier Z1 switches on, make silicon controlled rectifier Z1 switch on always, the early warning processing module works always.
The utility model discloses a theory of operation is: the power supply module supplies direct current to supply power for the equipment working module, the equipment working module is powered to drive equipment to work, the sampling voltage module samples the voltage output by the power supply module to the equipment working module and outputs the voltage to the under-voltage detection module, the reference voltage module converts the output voltage of the power supply module into reference voltage and outputs the reference voltage to the under-voltage detection module, meanwhile, the reference voltage supplies power for the early warning processing module, the under-voltage detection module compares the sampling voltage with the reference voltage, when the sampling voltage is lower than the reference voltage, the early warning processing module is controlled to work, the power supply module is disconnected from a circuit supplying power for the equipment working module when the early warning processing module works, and the alarm is sounded.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. 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 low pressure early warning protector circuit which characterized in that:
this low-voltage early warning protector circuit includes:
the power supply module is used for supplying direct current to supply power for the equipment working module;
the equipment working module is used for driving equipment to work by obtaining electricity;
the sampling voltage module is used for sampling the voltage output to the equipment working module by the power supply module and outputting the voltage to the undervoltage detection module;
the reference voltage module is used for converting the output voltage of the power supply module into a reference voltage and outputting the reference voltage to the undervoltage detection module, and meanwhile, the reference voltage supplies power to the early warning processing module;
the under-voltage detection module is used for comparing the sampling voltage with the reference voltage and controlling the early warning processing module to work when the sampling voltage is lower than the reference voltage;
the early warning processing module is used for disconnecting a line for supplying power to the equipment working module by the power supply module and sounding and giving out light to alarm when the early warning processing module works;
the power supply module is connected with the sampling voltage module, the reference voltage module and the equipment working module, the sampling voltage module is connected with the under-voltage detection module, the reference voltage module is connected with the under-voltage detection module and the early warning processing module, the under-voltage detection module is connected with the early warning processing module, and the early warning processing module is connected with the equipment working module.
2. The low-voltage early warning protector circuit according to claim 1, wherein the sampling voltage module comprises a resistor R1 and a resistor R2, one end of the resistor R1 is connected with the power supply module, the other end of the resistor R1 is connected with the resistor R2 and the under-voltage detection module, and the other end of the resistor R2 is grounded.
3. The low-voltage early warning protector circuit according to claim 1, wherein the reference voltage module comprises a capacitor C1, a voltage stabilizer U1, a diode D1, a resistor R3, a potentiometer RP1, a capacitor C2, a diode D2, and a switch S1, one end of the capacitor C1 is connected to an input end of the voltage stabilizer U1, a power supply module, and a cathode of the diode D1, the other end of the capacitor C1 is grounded, a ground end of the voltage stabilizer U1 is connected to the resistor R3, the potentiometer RP1, an anode of the diode D2, and the capacitor C2, the other end of the potentiometer RP1 is grounded, the other end of the capacitor C2 is grounded, the other end of the resistor R3 is connected to a cathode of the diode D2, an output end of the voltage stabilizer U1, an anode of the diode D1, and the switch S1, and the other end of the switch S1 is connected to the under-voltage detection module and the early warning processing module.
4. The low-voltage early warning protector circuit according to claim 3, wherein the under-voltage detection module comprises an amplifier U2, a thyristor Z1 and a resistor R4, the inverting terminal of the amplifier U2 is connected with the sampling voltage module, the non-inverting terminal of the amplifier U2 is connected with the reference voltage module, the output terminal of the amplifier U2 is connected with the control electrode of the thyristor Z1, the positive electrode of the thyristor Z1 is connected with the reference voltage module, the negative electrode of the thyristor Z1 is connected with the resistor R4, and the other end of the resistor R4 is connected with the early warning processing module.
5. The low-voltage early warning protector circuit as claimed in claim 1, wherein the early warning processing module comprises a transistor V1, a transistor V2, a diode D4, a resistor R5, a relay J, a diode D3, a switch S3 and a buzzer SPEAKER, the base of the transistor V1 is connected with the undervoltage detection module, the collector of the transistor V1 is connected with the resistor R5, the other end of the resistor R5 is connected with the reference voltage module, the relay J, the cathode of the diode D3 and the switch S3, the emitter of the transistor V1 is connected with the base of the transistor V2, the emitter of the transistor V2 is connected with the anode of the diode D4, the cathode of the diode D4 is grounded, the collector of the transistor V2 is connected with the other end of the relay J and the anode of the diode D3, and the other end of the switch S3 is grounded through the buzzer SPEAKER.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222371302.2U CN218070994U (en) | 2022-09-07 | 2022-09-07 | Low-voltage early warning protector circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222371302.2U CN218070994U (en) | 2022-09-07 | 2022-09-07 | Low-voltage early warning protector circuit |
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| CN218070994U true CN218070994U (en) | 2022-12-16 |
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| CN202222371302.2U Active CN218070994U (en) | 2022-09-07 | 2022-09-07 | Low-voltage early warning protector circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116626370A (en) * | 2023-07-18 | 2023-08-22 | 山东科创电力科技有限公司 | Voltage alarm circuit of power monitoring system |
| CN116679118A (en) * | 2023-06-05 | 2023-09-01 | 湖南华力电气技术有限公司 | Power voltage monitoring device |
-
2022
- 2022-09-07 CN CN202222371302.2U patent/CN218070994U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116679118A (en) * | 2023-06-05 | 2023-09-01 | 湖南华力电气技术有限公司 | Power voltage monitoring device |
| CN116626370A (en) * | 2023-07-18 | 2023-08-22 | 山东科创电力科技有限公司 | Voltage alarm circuit of power monitoring system |
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