CN217824759U - Voltage stabilizing circuit and fault arc detector thereof - Google Patents
Voltage stabilizing circuit and fault arc detector thereof Download PDFInfo
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- CN217824759U CN217824759U CN202221328870.8U CN202221328870U CN217824759U CN 217824759 U CN217824759 U CN 217824759U CN 202221328870 U CN202221328870 U CN 202221328870U CN 217824759 U CN217824759 U CN 217824759U
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Abstract
The embodiment of the utility model provides a voltage stabilizing circuit and fault arc detector thereof, voltage stabilizing circuit includes: the alternating current access end is used for accessing commercial power; the surge suppression module is used for suppressing a surge signal in a circuit; the voltage reduction module is used for carrying out voltage reduction treatment; the rectifying module is used for converting alternating current into direct current; the voltage stabilizing module is used for performing voltage stabilizing treatment, and the alternating current access end, the surge suppression module, the voltage reduction module, the rectification module and the voltage stabilizing module are sequentially connected; and the alternating current access end and the voltage stabilizing module are connected with the zero-crossing detection module. According to the utility model discloses the scheme can make power module possess stronger steady voltage effect to can prevent well that the condition that the excessive pressure burns out the trouble arc detector from taking place.
Description
Technical Field
The utility model relates to a circuit equipment field, in particular to voltage stabilizing circuit and fault arc detector thereof.
Background
The fault arc detector can detect the fault arc in the line, so that the safety of daily electricity utilization is improved, and the fault arc detector is increasingly applied to daily life of people; however, the power module of the current fault arc detector is only a conventional voltage stabilizing module, but the problem of overvoltage burnout cannot be solved well.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.
Therefore, the utility model provides a voltage stabilizing circuit can make power module possess stronger steady voltage effect to can prevent well that the condition of excessive pressure from burning out fault arc detector from taking place.
The utility model discloses still provide a fault arc detector who possesses above-mentioned voltage stabilizing circuit.
According to the utility model discloses voltage stabilizing circuit of first aspect embodiment, include:
the alternating current access end is used for accessing commercial power;
the surge suppression module is used for suppressing a surge signal in the circuit;
the voltage reduction module is used for carrying out voltage reduction treatment;
the rectifying module is used for converting alternating current into direct current;
the voltage stabilizing module is used for performing voltage stabilizing treatment, and the alternating current access end, the surge suppression module, the voltage reduction module, the rectification module and the voltage stabilizing module are sequentially connected;
and the alternating current access end and the voltage stabilizing module are connected with the zero-crossing detection module.
According to the utility model discloses voltage stabilizing circuit has following beneficial effect at least: the surge suppression module can suppress surge signals in the alternating current input by the alternating current input end; the voltage reduction module can reduce the voltage of the input alternating current; the rectifying module can convert the input alternating current into direct current; the voltage stabilizing module can perform voltage reduction and stabilization processing; the zero-crossing detection module can reduce the voltage rise rate and the current rise rate and can also prevent higher harmonic interference, thereby well preventing the occurrence of the condition that the fault arc detector is burnt out due to overvoltage and further ensuring the use safety of the fault arc detector.
According to some embodiments of the utility model, the ac access end includes first ac input end and second ac input end, surge suppression module includes piezo-resistor and first electric capacity, piezo-resistor's one end with the one end of first electric capacity all with first ac input end connects, piezo-resistor's the other end with the other end of first electric capacity all with second ac input end connects, first ac input end with second ac input end all with voltage reduction module connects.
According to some embodiments of the utility model, the step-down module includes the step-down coil, rectifier module includes the rectifier chip, the first input of step-down coil with first ac input end connects, the second input of step-down coil with the second ac input end is connected, the first output and the second output of step-down coil all with rectifier chip's ac input end connects, rectifier chip's direct current output with voltage stabilizing module connects.
According to some embodiments of the utility model, zero cross detection module includes first resistance, second resistance, third resistance, fourth resistance, first diode, seventh electric capacity, eighth electric capacity and optoelectronic coupler, the one end of first resistance with first ac input end connects, the positive pole of first diode the one end of eighth electric capacity with optoelectronic coupler's second input end all with second ac input end connects, the other end of first resistance with the one end of third resistance is connected, the other end of third resistance the negative pole of first diode with the other end of eighth electric capacity all with optoelectronic coupler's first input end connects, second resistive connection in voltage stabilizing module with between optoelectronic coupler's the first output end, the one end of seventh electric capacity with optoelectronic coupler's second output end all is connected with the reference ground, fourth resistive connection in optoelectronic coupler's first output end with between the other end of seventh electric capacity, the other end of seventh electric capacity is used for connecting control module.
According to the utility model discloses a some embodiments still include filtering module, filtering module connect in the rectifier module with between the voltage stabilizing module.
According to the utility model discloses a some embodiments, the filtering module includes first polarity electric capacity and third electric capacity, first polarity electric capacity with the third electric capacity all with connect in between the direct current output of rectification chip.
According to some embodiments of the utility model, the voltage stabilization module includes the voltage stabilization chip, the model of voltage stabilization chip is LM1117MP.
According to some embodiments of the present invention, the model of the photoelectric coupler is TLP321.
According to some embodiments of the invention, the model of the varistor is 14D511K.
According to the utility model discloses fault arc detector of second aspect embodiment, including the voltage stabilizing circuit of above-mentioned first aspect.
According to the utility model discloses fault arc detector has following beneficial effect at least: the surge suppression module can suppress surge signals in the alternating current input by the alternating current input end; the voltage reduction module can reduce the voltage of the input alternating current; the rectifier module can convert the input alternating current into direct current; the voltage stabilizing module can perform voltage reduction and stabilization processing; the zero-crossing detection module can reduce the voltage rise rate and the current rise rate and can also prevent higher harmonic interference, thereby well preventing the occurrence of the condition that the fault arc detector is burnt out due to overvoltage and further ensuring the use safety of the fault arc detector.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosed embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the example serve to explain the principles of the disclosure and not to limit the disclosure.
Fig. 1 is a schematic block diagram of a leakage circuit provided by an embodiment of the present invention;
fig. 2 is a partial circuit schematic of a leakage circuit according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a voltage regulator module of a leakage circuit according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a zero-crossing detection module of a leakage circuit according to an embodiment of the present invention.
Reference numerals are as follows:
the surge suppression circuit comprises an alternating current access terminal 100, a surge suppression module 200, a voltage reduction module 300, a rectification module 400, a filtering module 500, a voltage stabilization module 600 and a zero-crossing detection module 700.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
In the description of the present invention, a plurality of meanings are one or more, a plurality of meanings are two or more, and the terms greater than, smaller than, exceeding, etc. are understood as excluding the number, and the terms greater than, lower than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solution.
The embodiments of the present invention will be further explained with reference to the drawings.
As shown in fig. 1, a voltage stabilizing circuit provided by an embodiment of the present invention includes an ac access terminal 100, a surge suppressing module 200, a voltage reducing module 300, a rectifying module 400, a voltage stabilizing module 600, and a zero-crossing detecting module 700; the alternating current access terminal 100 is used for accessing commercial power, and the alternating current access terminal 100 is used for accessing commercial power; the surge suppression module 200, the surge suppression module 200 is used for suppressing surge signals in the circuit; the voltage reduction module 300, the voltage reduction module 300 is used for performing voltage reduction processing; the rectifier module 400, the rectifier module 400 is used for converting the alternating current into the direct current; the voltage stabilizing module 600 is used for performing voltage stabilizing processing, and the alternating current access end 100, the surge suppression module 200, the voltage reduction module 300, the rectification module 400 and the voltage stabilizing module 600 are sequentially connected; the zero-crossing detection module 700, the ac input terminal 100 and the voltage stabilizing module 600 are all connected to the zero-crossing detection module 700.
It should be noted that the surge suppression module 200 can suppress surge signals in the ac power input by the ac input terminal; the voltage reduction module 300 can reduce the voltage of the input alternating current; the rectifying module 400 can convert the input ac power into dc power; the voltage stabilizing module 600 can perform voltage reduction and stabilization; the zero-cross detection module 700 can reduce the voltage rise rate and the current rise rate, and can also prevent high-order harmonic interference, thereby well preventing the occurrence of the situation that the fault arc detector is burnt out due to overvoltage, and further ensuring the use safety of the fault arc detector.
Referring to fig. 2, in some embodiments of the present invention, ac input end 100 includes a first ac input end and a second ac input end, surge suppression module 200 includes a varistor RV1 and a first capacitor C1, one end of varistor RV1 and one end of first capacitor C1 are all connected with first ac input end, the other end of varistor RV1 and the other end of first capacitor C1 are all connected with second ac input end, and first ac input end and second ac input end are all connected with voltage reduction module 300.
It should be noted that the varistor RV1 is a voltage-limiting protection device. By utilizing the nonlinear characteristic of the voltage dependent resistor RV1, when an overvoltage appears between two poles of the voltage dependent resistor RV1, the voltage dependent resistor RV1 can clamp the voltage to a relatively fixed voltage value, and therefore the protection of a post-stage circuit is realized. The main parameters of the piezoresistor RV1 are: voltage dependent voltage, current capacity, junction capacitance, response time, etc. Surge signals generated in the circuit can be well restrained by the piezoresistor RV 1; the first capacitor C1 further performs suppression processing on the surge signal.
Referring to fig. 2, in some embodiments of the present invention, the voltage-reducing module 300 includes a voltage-reducing coil L1, the rectifier module 400 includes a rectifier chip M1, a first input end of the voltage-reducing coil L1 is connected to a first ac input end, a second input end of the voltage-reducing coil L1 is connected to a second ac input end, a first output end and a second output end of the voltage-reducing coil L1 are both connected to an ac input end of the rectifier chip M1, and a dc output end of the rectifier chip M1 is connected to the voltage-stabilizing module 600.
It should be noted that the voltage-reducing coil L1 can perform voltage-reducing processing on the input alternating current, so that the voltage can be used by the fault arc detector; the rectifying chip M1 can convert alternating current into direct current.
Referring to fig. 3, in some embodiments of the present invention, zero cross detection module 700 includes first resistor R1, second resistor R2, third resistor R3, fourth resistor R4, first diode D1, seventh capacitor C7, eighth capacitor C8 and photoelectric coupler U2, one end of first resistor R1 is connected with first ac input end, the positive pole of first diode D1, the one end of eighth capacitor C8 and the second input end of photoelectric coupler U2 are all connected with second ac input end, the other end of first resistor R1 is connected with one end of third resistor R3, the other end of third resistor R3, the negative pole of first diode D1 and the other end of eighth capacitor C8 are all connected with the first input end of photoelectric coupler U2, second resistor R2 is connected between the first output end of voltage stabilizing module 600 and photoelectric coupler U2, one end of seventh capacitor C7 and the second output end of photoelectric coupler U2 are all connected with reference ground, fourth resistor R4 is connected between the first output end of photoelectric coupler U2 and the seventh capacitor C7, and the other end of seventh capacitor C7 is used for controlling the connection between the first capacitor C7 and the second output end of photoelectric coupler U2.
It should be noted that when the positive half cycle of the alternating current is input, the photoelectric coupler U2 is turned on, and at this time, the other end of the seventh capacitor C7 inputs the voltage of the voltage stabilizing module 600 to the control module; when the negative half cycle of alternating current is input, photoelectric coupler U2 switches on, and the other end of seventh electric capacity C7 inputs the voltage of voltage stabilizing module 600 to control module this moment, realizes crossing the trigger of crossing the zero point, and step-down voltage rate of rise and current rate of rise can also prevent the higher harmonic interference to can prevent well because the overvoltage and lead to the condition that the trouble arc detector burns out to take place, further guarantee the safety in utilization of trouble arc detector.
Referring to fig. 1, in some embodiments of the present invention, the present invention further includes a filtering module 500, and the filtering module 500 is connected between the rectifying module 400 and the voltage stabilizing module 600. The filtering module 500 can well filter and process the noise in the line.
Referring to fig. 2, in some embodiments of the present invention, the filtering module 500 includes a first polarity capacitor C2 and a third polarity capacitor C3, and the first polarity capacitor C2 and the third polarity capacitor C3 are connected between the dc output terminals of the rectifying chip M1. The first polarity capacitor C2 and the third polarity capacitor C3 may both filter noise in the dc signal output by the rectifier chip M1.
Referring to fig. 3, in some embodiments of the present invention, the voltage stabilizing module 600 includes a voltage stabilizing chip U1, and the model of the voltage stabilizing chip U1 is LM1117MP.
It should be noted that LM1117MP is a series of low-dropout voltage regulators. The differential pressure is output at 1.2V, and the load current is 1.2V when 800 mA. It has the same pin arrangement as the semiconductor industry standard device LM 317. LM1117 has the version of adjustable voltage, can realize 1.25-13.8V output voltage range through 2 external resistors.
Referring to fig. 4, in some embodiments of the present invention, the model of the photocoupler U2 is TLP321.TLP321 is a common photoelectric coupler, and has fast response and sensitive response.
Referring to fig. 2, in some embodiments of the present invention, the varistor RV1 is 14D511K. The 14D511K has strong voltage resistance, so that surge signals in alternating current can be well restrained.
Furthermore, an embodiment of the utility model also provides a fault arc detector, including the voltage stabilizing circuit of above-mentioned embodiment.
Through the technical scheme, the surge suppression module 200 can suppress surge signals in the alternating current input by the alternating current input end; the voltage reduction module 300 can reduce the voltage of the input alternating current; the rectifier module 400 can convert the input ac power into dc power; the voltage stabilizing module 600 can perform voltage reduction and stabilization; the zero-cross detection module 700 can reduce the voltage rise rate and the current rise rate, and can also prevent higher harmonic interference, thereby well preventing the occurrence of the condition that the fault arc detector is burnt out due to overvoltage, and further ensuring the use safety of the fault arc detector.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention defined by the appended claims.
Claims (10)
1. A voltage regulator circuit, comprising:
the alternating current access end is used for accessing commercial power;
the surge suppression module is used for suppressing a surge signal in the circuit;
the voltage reduction module is used for carrying out voltage reduction treatment;
the rectifying module is used for converting alternating current into direct current;
the voltage stabilizing module is used for performing voltage stabilizing processing, and the alternating current access end, the surge suppression module, the voltage reduction module, the rectification module and the voltage stabilizing module are sequentially connected;
and the alternating current access end and the voltage stabilizing module are connected with the zero-crossing detection module.
2. The voltage stabilizing circuit according to claim 1, wherein the ac input terminal comprises a first ac input terminal and a second ac input terminal, the surge suppressing module comprises a voltage dependent resistor and a first capacitor, one end of the voltage dependent resistor and one end of the first capacitor are both connected to the first ac input terminal, the other end of the voltage dependent resistor and the other end of the first capacitor are both connected to the second ac input terminal, and the first ac input terminal and the second ac input terminal are both connected to the voltage dropping module.
3. The voltage stabilizing circuit according to claim 2, wherein the voltage reducing module comprises a voltage reducing coil, the rectifying module comprises a rectifying chip, a first input end of the voltage reducing coil is connected with the first alternating current input end, a second input end of the voltage reducing coil is connected with the second alternating current input end, a first output end and a second output end of the voltage reducing coil are both connected with the alternating current input end of the rectifying chip, and a direct current output end of the rectifying chip is connected with the voltage stabilizing module.
4. The voltage stabilizing circuit according to claim 3, wherein the zero-crossing detection module comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode, a seventh capacitor, an eighth capacitor and a photoelectric coupler, one end of the first resistor is connected to the first alternating current input end, the anode of the first diode, one end of the eighth capacitor and the second input end of the photoelectric coupler are all connected to the second alternating current input end, the other end of the first resistor is connected to one end of the third resistor, the other end of the third resistor, the cathode of the first diode and the other end of the eighth capacitor are all connected to the first input end of the photoelectric coupler, the second resistor is connected between the voltage stabilizing module and the first output end of the photoelectric coupler, one end of the seventh capacitor and the second output end of the photoelectric coupler are all connected to a reference ground, the fourth resistor is connected between the first output end of the photoelectric coupler and the other end of the seventh capacitor, and the other end of the first capacitor is used for connecting the control module.
5. The voltage regulator circuit of claim 3, further comprising a filter module coupled between the rectifier module and the regulator module.
6. The voltage regulator circuit of claim 5, wherein the filter module comprises a first polarity capacitor and a third polarity capacitor, and the first polarity capacitor and the third polarity capacitor are connected between the DC output terminal of the rectifier chip.
7. The voltage regulator circuit according to claim 1, wherein the voltage regulator module comprises a voltage regulator chip, and the model of the voltage regulator chip is LM1117MP.
8. The voltage stabilizing circuit according to claim 4, wherein the photoelectric coupler is TLP321 in model number.
9. The voltage regulator circuit of claim 2, wherein the piezoresistor is 14D511K in model number.
10. A fault arc detector comprising the voltage regulator circuit of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221328870.8U CN217824759U (en) | 2022-05-30 | 2022-05-30 | Voltage stabilizing circuit and fault arc detector thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221328870.8U CN217824759U (en) | 2022-05-30 | 2022-05-30 | Voltage stabilizing circuit and fault arc detector thereof |
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| Publication Number | Publication Date |
|---|---|
| CN217824759U true CN217824759U (en) | 2022-11-15 |
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| CN202221328870.8U Active CN217824759U (en) | 2022-05-30 | 2022-05-30 | Voltage stabilizing circuit and fault arc detector thereof |
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- 2022-05-30 CN CN202221328870.8U patent/CN217824759U/en active Active
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