CN212180886U - Protection collection system of alternating current power supply - Google Patents
Protection collection system of alternating current power supply Download PDFInfo
- Publication number
- CN212180886U CN212180886U CN202020634726.1U CN202020634726U CN212180886U CN 212180886 U CN212180886 U CN 212180886U CN 202020634726 U CN202020634726 U CN 202020634726U CN 212180886 U CN212180886 U CN 212180886U
- Authority
- CN
- China
- Prior art keywords
- current
- power supply
- resistor
- signal
- alternating current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a protection acquisition device of an alternating current power supply, which comprises a voltage acquisition unit, a current acquisition unit, a signal processing unit and a singlechip protection unit; the voltage acquisition unit and the current acquisition unit are respectively used for acquiring a voltage signal and a current signal of an alternating current power supply; the signal processing unit is used for converting alternating current signals into direct current signals, and the single chip microcomputer protection unit is used for controlling power supply output and alarm prompting. The utility model provides a device stable performance, measurement voltage range are variable, small, the quality is light, the price is low, the integrated level is high, weak point consuming time in the aspect of design and production, and the error that measuring current arouses by the difference of device is little.
Description
Technical Field
The utility model relates to a power protection device field especially relates to an alternating current power supply's protection collection system.
Background
At present, an R-type transformer is commonly used for realizing isolation and collection of alternating voltage, and the problems of large volume, fixed voltage measurement range, heavy weight, high cost, long time consumption of design and production operation, inconvenience in integration and the like exist. The original through current transformer has large current collected and output, the output current is usually in the range of 0-5A, and the output current is converted into a proper voltage signal for control through a smaller resistance value, but the precision of the output current is difficult to select and control through a small resistance value.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the prior art, the utility model provides a protection collection system of alternating current power supply has realized that distal end load voltage is stable, technical scheme is as follows:
the utility model provides a protection acquisition device of an alternating current power supply, which comprises a voltage acquisition unit, a current acquisition unit, a signal processing unit and a singlechip protection unit;
the voltage acquisition unit and the current acquisition unit are respectively used for acquiring a voltage signal and a current signal of an alternating current power supply; the voltage acquisition unit comprises a third resistor, a fourth resistor, a current type voltage transformer and a first signal converter, wherein the primary side of the current type voltage transformer, the third resistor and the fourth resistor are connected to the output end of an alternating current power supply in series, the secondary side of the current type voltage transformer is connected with the input end of the first signal converter, and the output end of the first signal converter is connected with the input end of the signal processing unit; the current acquisition unit comprises a current transformer and a second signal converter, a through type current transformer is arranged at the output end of the alternating current power supply and used for acquiring output current, the primary side of the current transformer is connected to the secondary side of the through type current transformer, the secondary side of the current transformer is connected with the input end of the second signal converter, and the output end of the second signal converter is connected with the input end of the signal processing unit; the first signal converter and the second signal converter are used for converting current signals into voltage signals;
the output end of the signal processing unit is connected with the input end of the single chip microcomputer protection unit; the signal processing unit is used for converting alternating current signals into direct current signals, and the single chip microcomputer protection unit is used for controlling power supply output and alarm prompting.
Furthermore, the first signal converter comprises a first chip, a first resistor and a first capacitor, wherein a reverse input end and a forward input end of the first chip are respectively connected with two ends of a secondary side of the current-mode voltage transformer, and the first resistor and the first capacitor are respectively connected between the reverse input end and an output end of the first chip;
the second signal converter comprises a second chip, a second resistor and a second capacitor, wherein the reverse input end and the forward input end of the second chip are respectively connected with two ends of the secondary side of the current transformer, and the second resistor and the second capacitor are respectively connected between the reverse input end and the output end of the second chip.
Furthermore, the signal processing unit comprises two groups of signal processing components capable of operating independently, the input ends of the two groups of signal processing components are respectively connected with the output ends of the first chip and the second chip, and the output ends of the two groups of signal processing components are connected with the single chip microcomputer protection unit.
Further, the current transformer is used for converting the collected current signals into 0-5mA output, and the first signal converter and the second signal converter are used for outputting 0-5V alternating current signals.
Further, the signal processing unit is used for converting the alternating current signal into a direct current signal of 0-3V.
Further, the first capacitor and the second capacitor are used for filtering.
Furthermore, the first chip and the second chip are OP07 chips, and the positive input ends of the first chip and the second chip are both led out by leads and grounded.
Further, the current type voltage transformer is a TV1013 type, and the rated current ratio of the current type voltage transformer is 2mA/2 mA; the current transformer is in a TA1015 model, and the rated current ratio of the current transformer is 5A/5 mA.
Further, the third resistor and/or the fourth resistor are adjustable resistors.
Further, the third resistor and the fourth resistor have the same or different resistance values.
The utility model provides a beneficial effect that technical scheme brought as follows:
a. the voltage and current sampling devices are integrated on the PCB, so that the operation is convenient;
b. the device has stable performance, variable measurement voltage range, small volume, light weight, low price, high integration level, short time consumption in design and production, and small error caused by difference of devices in measurement current;
c. the device realizes protection of different levels by sampling through the single chip microcomputer and realizing protection of different voltage levels and different current levels, and meets the protection requirements of customers on different working conditions conveniently.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a circuit structure diagram of a protection and collection device for an ac power supply according to an embodiment of the present invention.
Wherein the reference numerals include: the device comprises a power supply 1, an alternating current power supply 2, a penetration type current transformer 3, a voltage acquisition unit 31, a current type voltage transformer 32, a first chip 33, a first resistor 34, a first capacitor 35, a third resistor 36, a fourth resistor 4, a current acquisition unit 41, a current transformer 42, a second chip 43, a second resistor 44, a second capacitor 5, a signal processing unit and a single chip protection unit 6.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
In an embodiment of the present invention, a protection and collection device for an ac power supply is provided, and the specific structure is shown in fig. 1, including a voltage collection unit 3, a current collection unit 4, a signal processing unit 5 and a single chip protection unit 6; the voltage acquisition unit 3 and the current acquisition unit 4 are respectively used for acquiring a voltage signal and a current signal of an alternating current power supply; the signal processing unit 5 is used for converting alternating current signals into direct current signals, and the single chip microcomputer protection unit 6 is used for controlling power supply output and alarm prompting.
The voltage acquisition unit 3 comprises a third resistor 35, a fourth resistor 36, a current-mode voltage transformer 31 and a first signal converter; the current type voltage transformer 31 adopts a TV1013 type, and the rated current ratio is 2mA/2 mA; the primary side of the current-mode voltage transformer 31 is connected to the output end of the alternating current power supply 1 in series together with the third resistor 35 and the fourth resistor 36; the first signal converter comprises a first chip 32, a first resistor 33 and a first capacitor 34, wherein a reverse input end and a forward input end of the first chip 32 are respectively connected with two ends of an auxiliary side of the current-mode voltage transformer 31, the first resistor 33 and the first capacitor 34 are respectively connected between the reverse input end and an output end of the first chip 32, the first chip 32 adopts an OP07 chip, and a lead is led out of the forward input end of the first chip 32 to be grounded.
The current acquisition unit 4 comprises a current transformer 41 and a second signal converter; the current transformer 41 adopts a TA1015 model, and the rated current ratio is 5A/5 mA; the output end of the alternating current power supply 1 is provided with a through type current transformer 2, the through type current transformer 2 is used for collecting output current at the output end of the alternating current power supply and adjusting the current, and the primary side of the current transformer 41 is connected to a secondary side terminal of the through type current transformer 2; the second signal converter comprises a second chip 42, a second resistor 43 and a second capacitor 44, wherein a reverse input end and a forward input end of the second chip 42 are respectively connected with two ends of a secondary side of the current transformer 41, the second resistor 43 and the second capacitor 44 are respectively connected between the reverse input end and an output end of the second chip 42, the second chip 42 adopts an OP07 chip, and a lead is led out of a forward input end of the second chip 42 to be grounded.
The signal processing unit 5 comprises two groups of signal processing components capable of operating independently, the input ends of the two groups of signal processing components are respectively connected with the output ends of the first chip 32 and the second chip 42, and the output ends of the two groups of signal processing components are connected with the single chip microcomputer protection unit 6.
In an embodiment of the present invention, the third resistor 35 and the fourth resistor 36 may be adjustable resistors with different orders of magnitude, respectively for fine tuning and coarse tuning of the resistance.
In an embodiment of the present invention, the third resistor 35 and the fourth resistor 36 are resistors with different resistance values and easy to replace, and the range of the measured voltage can be changed by replacing the two resistors; the number of resistors to be replaced is not limited to two resistors, and other numbers of resistors are also within the protection scope of the present embodiment.
In an embodiment of the present invention, when the device collects the voltage signal, the device can change the current size of the primary side of the current type voltage transformer 31 by adjusting the resistance of the third resistor 35 and the fourth resistor 36 in the voltage collecting unit 3, and then change the ac current of the secondary side of the current type voltage transformer 31, and then change the current signal outputted from the secondary side of the current type voltage transformer 31 into the ac voltage signal of 0-5V through the first chip 32 and the first resistor 33, wherein the first capacitor 34 has a filtering function, and then pass through the signal processing unit 5, the signal processing unit 5 converts the ac voltage signal of 0-5V into the dc signal of 0-3V, and sends the dc signal to the single chip protection unit 6 for processing.
When collecting current signals, the output current of the main loop of the alternating current power supply adopts a penetration type current transformer 2 to sample the output current, the secondary side current of the current transformer is usually in the range of 0-5A, therefore, the primary side current range of the TA1015 model current transformer 41 is matched, the universality is strong, the measuring range only needs to adjust the penetration type current transformer 2 of the main loop, when the current passing through the penetration type current transformer 2 of the main loop passes through the current transformer 41, the collected current is converted into 0-5mA to be output, then the current signal from the secondary side of the current transformer 41 is converted into an alternating voltage signal of 0-5V through the second chip 42 and the second resistor 43, the second capacitor 44 has a filtering function, and then the signal processing unit 5 converts the 0-5V ac voltage signal into a dc signal, which is sent to the single chip protection unit 6 for processing.
And finally, the single chip microcomputer protection unit 6 can realize alarm prompt or protection of different degrees by processing and calculating the acquired signals, and when the voltage or current is abnormal and large, the single chip microcomputer protection unit 6 can control the power supply to stop outputting and carry out alarm prompt through an indicator lamp and a loudspeaker.
The utility model provides a device is integrated at the PCB board with voltage, electric current sampling device, and the voltage measurement scope can carry out reconfiguration through resistance and satisfy the requirement, and the electric current sampling is accurate, and design and production preparation technology are simple and convenient, occupation space is little, the quality is light.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A protection acquisition device of an alternating current power supply is characterized by comprising a voltage acquisition unit (3), a current acquisition unit (4), a signal processing unit (5) and a single chip microcomputer protection unit (6);
the voltage acquisition unit (3) and the current acquisition unit (4) are respectively used for acquiring a voltage signal and a current signal of an alternating current power supply; the voltage acquisition unit (3) comprises a third resistor (35), a fourth resistor (36), a current type voltage transformer (31) and a first signal converter, wherein the primary side of the current type voltage transformer (31), the third resistor (35) and the fourth resistor (36) are connected in series to the output end of the alternating current power supply (1), the secondary side of the current type voltage transformer (31) is connected with the input end of the first signal converter, and the output end of the first signal converter is connected with the input end of the signal processing unit (5); the current acquisition unit (4) comprises a current transformer (41) and a second signal converter, a through type current transformer (2) is arranged at the output end of the alternating current power supply (1), the through type current transformer (2) is used for acquiring output current, the primary side of the current transformer (41) is connected to the secondary side of the through type current transformer (2), the secondary side of the current transformer (41) is connected with the input end of the second signal converter, and the output end of the second signal converter is connected with the input end of the signal processing unit (5); the first signal converter and the second signal converter are used for converting current signals into voltage signals;
the output end of the signal processing unit (5) is connected with the input end of the single chip microcomputer protection unit (6); the signal processing unit (5) is used for converting alternating current signals into direct current signals, and the single chip microcomputer protection unit (6) is used for controlling power output and alarm prompt.
2. The protection acquisition device of the alternating current power supply according to claim 1, wherein the first signal converter comprises a first chip (32), a first resistor (33) and a first capacitor (34), the reverse input end and the forward input end of the first chip (32) are respectively connected with two ends of the secondary side of the current-mode voltage transformer (31), and the first resistor (33) and the first capacitor (34) are respectively connected between the reverse input end and the output end of the first chip (32);
the second signal converter comprises a second chip (42), a second resistor (43) and a second capacitor (44), wherein a reverse input end and a forward input end of the second chip (42) are respectively connected with two ends of a secondary side of the current transformer (41), and the second resistor (43) and the second capacitor (44) are respectively connected between the reverse input end and an output end of the second chip (42).
3. The protection and acquisition device for the alternating current power supply according to claim 2, wherein the signal processing unit (5) comprises two sets of signal processing components capable of operating independently, input ends of the two sets of signal processing components are respectively connected with output ends of the first chip (32) and the second chip (42), and output ends of the two sets of signal processing components are both connected with the single chip microcomputer protection unit (6).
4. The protection acquisition device of an alternating current power supply according to claim 1, wherein the current transformer (41) is used for converting the acquired current signal into 0-5mA output, and the first signal converter and the second signal converter are used for outputting 0-5V alternating current signals.
5. A protection acquisition device for an AC power supply according to claim 4, characterized in that said signal processing unit (5) is adapted to convert an AC signal into a DC signal of 0-3V.
6. A protection acquisition device for an alternating current power supply according to claim 2, characterized in that said first capacitor (34) and said second capacitor (44) are used for filtering.
7. The protection acquisition device of the alternating current power supply according to claim 2, wherein the first chip (32) and the second chip (42) adopt OP07 chips, and positive direction input ends of the first chip (32) and the second chip (42) are respectively provided with a lead for leading out a ground.
8. The protection acquisition device of an alternating current power supply according to claim 1, characterized in that said current type voltage transformer (31) is of the TV1013 type, and its rated current ratio is 2mA/2 mA; the current transformer (41) adopts a TA1015 model, and the rated current ratio is 5A/5 mA.
9. Protection acquisition device for an alternating current power supply according to claim 1, characterized in that said third resistor (35) and/or said fourth resistor (36) are adjustable resistors.
10. Protection acquisition device of an alternating current power supply according to claim 1, characterized in that said third resistor (35) and said fourth resistor (36) have the same or different resistance values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020634726.1U CN212180886U (en) | 2020-04-24 | 2020-04-24 | Protection collection system of alternating current power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020634726.1U CN212180886U (en) | 2020-04-24 | 2020-04-24 | Protection collection system of alternating current power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212180886U true CN212180886U (en) | 2020-12-18 |
Family
ID=73768233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020634726.1U Active CN212180886U (en) | 2020-04-24 | 2020-04-24 | Protection collection system of alternating current power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212180886U (en) |
-
2020
- 2020-04-24 CN CN202020634726.1U patent/CN212180886U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213843381U (en) | Alternating voltage sampling and zero-crossing detection circuit based on current transformer | |
| CN107860979B (en) | Method and system for testing capacity and internal resistance of super capacitor energy storage system | |
| CN203643502U (en) | Full-automatic microcurrent detection device | |
| CN106249045A (en) | A kind of wide-range electric power meter and metering method thereof | |
| CN111060864A (en) | Secondary side state detection circuit of current transformer, fire alarm device and electric energy meter | |
| CN111198297A (en) | Signal acquisition device based on Rogowski coil and zero-flux current sensor | |
| CN202018478U (en) | Wide-range electric energy metering device for fluctuating load | |
| CN212180886U (en) | Protection collection system of alternating current power supply | |
| CN209070006U (en) | A kind of current sensor | |
| CN201215505Y (en) | Digital weighing controller | |
| CN109510457B (en) | Output voltage adjustable power supply circuit and gas data acquisition equipment | |
| CN201788222U (en) | AC-DC (alternating current-direct current) compatible isolated voltage sampling circuit | |
| CN101557107A (en) | Current control and system monitoring device of module-type DC power supply system | |
| CN207096322U (en) | Power supply sample circuit and its low-voltage circuit breaker based on single electric current transformer | |
| CN216351137U (en) | Power signal acquisition circuit | |
| CN111198298A (en) | Data acquisition device suitable for multiple current sensor | |
| CN209946250U (en) | Three-phase current acquisition circuit based on compensation circuit and acquisition device | |
| CN211123004U (en) | Quick detection device of high-low voltage cabinet | |
| CN209784435U (en) | Current acquisition circuit and current detection circuit | |
| CN209821274U (en) | Optical coupler detection current circuit | |
| CN116106623B (en) | Dual-power calculation single-phase electric energy meter and method for non-isolated sampling alternating current | |
| CN2430691Y (en) | High voltage and super high voltage photoelectric isolated current mutual inductor | |
| CN104635037A (en) | High-precision detection circuit for full-bridge rectification load power and alternating current power | |
| CN216747927U (en) | Testing device | |
| CN112325979B (en) | Dynamic closed-loop control multichannel capacitive oil mass sensor signal conditioning system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |