CN203037722U - Current sampling circuit - Google Patents
Current sampling circuit Download PDFInfo
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- CN203037722U CN203037722U CN 201320039816 CN201320039816U CN203037722U CN 203037722 U CN203037722 U CN 203037722U CN 201320039816 CN201320039816 CN 201320039816 CN 201320039816 U CN201320039816 U CN 201320039816U CN 203037722 U CN203037722 U CN 203037722U
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- power supply
- manganese
- sampling circuit
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Abstract
The utility model provides a current sampling circuit. The current sampling circuit comprises an isolation optical coupler and sampling manganese copper wires, wherein the isolation optical coupler includes pin1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7 and pin 8; pin 1 and pin 4 serve as primary side power supply pins of the optical coupler, and pin 2 and pin 3 serves an primary side voltage input pins; pin 5 and pin 8 serve as secondary side power supply pins of the optical coupler, and pin 6 and pin 7 serve as secondary side voltage output pins; two ends of each sampling manganese copper wire are respectively connected to pin 2 and pin 3 of the isolation optical coupler. The current sampling circuit is simple in structure, small in volume, and accurate and rapid in sampling; the cost is far lower than that of a current Hall sensor sampling circuit; and the power supply is convenient to realize since the power supply is positive voltage.
Description
Technical field
The utility model belongs to circuit field, is specifically related to a kind of current sampling circuit.
Background technology
The current sampling circuit of prior art, as shown in Figure 1, comprise current Hall sensor CMS1, absorb capacitor C and sampling resistor R, 1 of current Hall sensor CMS1,2,3,4,5 and 6 pin are the input and output pin of tested electric current, 7 pin are the sample rate current output pin, 8,9 pin are the positive-negative power (different sensors power supply difference) of power supply, current Hall sensor CMS1 is connected on the negative terminal of output, tested electric current is from 1,2,3 pin flow into, from 4,5,6 pin flow out, connect sampling resistor R and absorb capacitor C at 7 pin, sampling resistor R and to absorb capacitor C be to be arranged in parallel, the size that can regulate sampling resistor R according to the size of sample rate current obtains the magnitude of voltage VOUT of tested electric current.The advantage that adopts this sample circuit is that sampling is accurate, and stable, antijamming capability is strong; Shortcoming is that current Hall sensor CMS1 volume is big, needs the generating positive and negative voltage power supply, and negative voltage is of little use in circuit, need provide separately, and current Hall sensor CMS1 price is high.
The utility model content
The utility model provides a kind of current sampling circuit, can well overcome the above problems.
The utility model provides a kind of current sampling circuit, described current sampling circuit comprises isolates optocoupler and sampling manganese-copper filament, described isolation optocoupler comprises 1,2,3,4,5,6,7 and 8 pin, 1,4 pin are the former limit of optocoupler power supply power supply pin, 2,3 pin are the original edge voltage input pin, 5,8 pin are optical coupling secondary edges power supply power supply pin, and 6,7 pin are the secondary voltage output pin, and the two ends of sampling manganese-copper filament are connected respectively to 2,3 pin of isolating optocoupler.
According to concrete technical scheme of the present utility model, wherein, described sampling manganese-copper filament is one.
According to concrete technical scheme of the present utility model, wherein, described sampling manganese-copper filament is two or more, and two or more sampling manganese-copper filament is parallel with one another.
The principle of work of current sampling circuit of the present utility model is: adopt manganese-copper filament to do sampling resistor in circuit, the magnitude of voltage that obtains obtains the magnitude of voltage of the isolation of an amplification by the isolation optocoupler.The advantage of current sampling circuit of the present utility model is: simple in structure, volume is little, and sampling accurately, and is quick, and cost is convenient to realize thereby power supply all is positive voltage far below the price of current Hall sensor CMS1 sample circuit.
Description of drawings
The following drawings only is intended to the utility model done and schematically illustrates and explain, does not limit scope of the present utility model.Wherein:
Fig. 1 is the current sampling circuit figure of prior art;
Fig. 2 is current sampling circuit figure of the present utility model.
Part description in the accompanying drawing:
C-absorbs electric capacity, the R-sampling resistor, and CMS1-current Hall sensor, ISO1-isolates optocoupler, the RS1 – first sampling manganese-copper filament, the RS2-second sampling manganese-copper filament.
Embodiment
Mode with specific embodiment illustrates the utility model below, but the utility model never only limits to the following example.
A kind of current sampling circuit, as shown in Figure 2, described current sampling circuit comprises isolates optocoupler ISO1 and sampling manganese-copper filament, described isolation optocoupler ISO1 comprises 1,2,3,4,5,6,7 and 8 pin, 1,4 pin are the former limit of optocoupler power supply power supply pin, and 2,3 pin are the original edge voltage input pin, and 5,8 pin are optical coupling secondary edges power supply power supply pin, 6,7 pin are the secondary voltage output pin, and the two ends of sampling manganese-copper filament are connected respectively to 2,3 pin of isolating optocoupler ISO1.
The sampling manganese-copper filament is received the negative terminal of output, can produce pressure reduction at the sampling manganese-copper filament when electric current flows through, the two ends of sampling manganese-copper filament are connected to 2,3 pin of isolating optocoupler ISO1, just obtain the magnitude of voltage VOUT of the tested electric current that amplifies through optocoupler at 6,7 pin.
Described sampling manganese-copper filament is one.
Described sampling manganese-copper filament is two or more, two or more sampling manganese-copper filament is parallel with one another, the quantity of sampling manganese-copper filament can be increased and decreased according to the size of electric current, when the sampling manganese-copper filament is two or more, just output voltage values VOUT can be regulated.
Embodiment 1
A kind of current sampling circuit, as shown in Figure 2, described current sampling circuit comprises isolates optocoupler ISO1 and two sampling manganese-copper filaments, article two, the sampling manganese-copper filament is respectively the first sampling manganese-copper filament RS1 and the second sampling manganese-copper filament RS2, the first sampling manganese-copper filament RS1 and the second sampling manganese-copper filament RS2 are parallel with one another, described isolation optocoupler ISO1 comprises 1,2,3,4,5,6,7 and 8 pin, 1,4 pin are the former limit of optocoupler power supply power supply pin, 2,3 pin are the original edge voltage input pin, 5,8 pin are optical coupling secondary edges power supply power supply pin, 6,7 pin are the secondary voltage output pin, and the two ends of the first sampling manganese-copper filament RS1 parallel with one another and the second sampling manganese-copper filament RS2 are connected respectively to and isolate 2 of optocoupler ISO1,3 pin.
The advantage of current sampling circuit of the present utility model is: simple in structure, volume is little, and sampling accurately, and is quick, and cost is convenient to realize thereby power supply all is positive voltage far below the price of current Hall sensor CMS1 sample circuit.
Above-described only is principle of the present utility model and preferred embodiment.Should be pointed out that to those skilled in the art, under the prerequisite that does not break away from the utility model principle, can also make some distortion and improvement, also should be considered as belonging to protection domain of the present utility model.
Claims (3)
1. current sampling circuit, it is characterized in that: described current sampling circuit comprises isolates optocoupler and sampling manganese-copper filament, described isolation optocoupler comprises 1,2,3,4,5,6,7 and 8 pin, 1,4 pin are the former limit of optocoupler power supply power supply pin, 2,3 pin are the original edge voltage input pin, 5,8 pin are optical coupling secondary edges power supply power supply pin, and 6,7 pin are the secondary voltage output pin, and the two ends of sampling manganese-copper filament are connected respectively to 2,3 pin of isolating optocoupler.
2. current sampling circuit according to claim 1, it is characterized in that: described sampling manganese-copper filament is one.
3. current sampling circuit according to claim 1 is characterized in that: described sampling manganese-copper filament is two or more, and two or more sampling manganese-copper filament is parallel with one another.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320039816 CN203037722U (en) | 2013-01-24 | 2013-01-24 | Current sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320039816 CN203037722U (en) | 2013-01-24 | 2013-01-24 | Current sampling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203037722U true CN203037722U (en) | 2013-07-03 |
Family
ID=48689833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320039816 Expired - Fee Related CN203037722U (en) | 2013-01-24 | 2013-01-24 | Current sampling circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203037722U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109839534A (en) * | 2017-11-27 | 2019-06-04 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of power current isolation Acquisition Circuit |
-
2013
- 2013-01-24 CN CN 201320039816 patent/CN203037722U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109839534A (en) * | 2017-11-27 | 2019-06-04 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of power current isolation Acquisition Circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20160124 |
|
| EXPY | Termination of patent right or utility model |