CN205229427U - D.C. high -current power calibrating installation - Google Patents
D.C. high -current power calibrating installation Download PDFInfo
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- CN205229427U CN205229427U CN201520973409.1U CN201520973409U CN205229427U CN 205229427 U CN205229427 U CN 205229427U CN 201520973409 U CN201520973409 U CN 201520973409U CN 205229427 U CN205229427 U CN 205229427U
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Abstract
The utility model discloses a D. C. High -current power calibrating installation, including direct current digital voltmeter, exchange digital voltmeter, direct current table and high -power resistive load unit, the D. C. High -current power that is detected respectively with direct current digital voltmeter, exchanges digital voltmeter, direct current shows and high -power resistive load unit connection, the direct current table is including simulation low value resistance and direct current voltage measurement appearance, simulation low value resistance is closed with low load effect sampling group of resistance by the current comparison appearance and forms, simulation low value resistance is connected with D. C. High -current power and direct current voltage measurement appearance respectively. The utility model discloses a design of direct current table and high -power resistive load unit has realized that direct current measuring range is 10A~1000A, has effectively solved the D. C. High -current power examination problem of tracing to the source, makes direct current detection accuracy reach 0.01 grade, satisfies current rules requirement completely.
Description
Technical field
The utility model belongs to power detecting technical field, particularly a kind of D.C. high-current power supply calibrating installation.
Background technology
At present, domestic every profession and trade is all according to JJG(space flight) 6-1999 D.C. regulated power supply vertification regulation calibrating direct supply, because the accuracy of measurement of DC current is low, measurement range is narrow, for the calibrating Shortcomings of high-current dc power supply.Large direct current measuring, mainly adopt shunt method both at home and abroad, but accuracy generally only can reach 0.1 grade in the past; Along with ampere-turn is than the widespread use of technology, adopts that the clamp on amperemeter cost of this principle is low, measurement range is large, therefore use extensively, but its accuracy is generally only 2 ~ 3 grades.
Vertification regulation due to domestic current is promulgated comparatively early, the use of high-current dc power supply increases gradually, existing measurement verification ability of standing there are following two main problems in me: 1) bearing power that uses of calibrating is less, only there is 5kW, the calibrating needs of big current can not be met, for other high-current supply, the operating load that tested power supply routine work uses can only be used, the load capacity of power supply can not be examined completely; 2) use measuring resistance as shunt for the direct supply lower than 100A, accuracy of measurement is also 0.05 grade; And adopt clamp on amperemeter to measure electric current more than the direct supply of 100A, accuracy of measurement grade is only 2 grades, but the error of indication grade of the tested electric current of regulatory requirements is 0.2 grade ~ 0.5 grade, qualification determination for tested power supply brings larger risk, especially for the direct supply that product uses and the judgement of D.C. high-current power supply used for product test.
Utility model content
Goal of the invention of the present utility model is: for above-mentioned Problems existing, provides a kind of calibrating that can meet below 1000A D.C. high-current power supply, and calibrating accuracy reaches the D.C. high-current power supply calibrating installation of 0.01 grade.
The technical solution of the utility model is achieved in that a kind of D.C. high-current power supply calibrating installation, it is characterized in that: comprise DC digital voltmeter, AC digital voltmeter, DC ammeter and high-power resistance load unit, detected D.C. high-current power supply respectively with DC digital voltmeter, AC digital voltmeter, DC ammeter and high-power resistance load unit connect, described DC ammeter comprises simulation low resistance and DC voltage measuring instrument, described simulation low resistance is combined by current comparator and low load effect sampling resistor, described simulation low resistance is connected with D.C. high-current power supply and DC voltage measuring instrument respectively, the big current of input is become a small area analysis by the ratio of current comparator by described current comparator, and make it by the low load effect sampling resistor of a known value, produce a voltage drop, this voltage drop equivalence can go out a low value shunt with the ratio of the big current of input, again by DC voltage measuring instrument proportionally relation draw surveyed current value.
D.C. high-current power supply calibrating installation described in the utility model, the scope that calibrating installation described in it is used for large direct current measuring is 10A ~ 1000A, and described DC ammeter has two groups, and correspondence detects 100A and 1000A two shelves respectively.
D.C. high-current power supply calibrating installation described in the utility model, described in it, low load effect sampling resistor is connected with sampling resistor load effect calibrating installation.
D.C. high-current power supply calibrating installation described in the utility model, described in it, high-power resistance load unit comprises over-voltage over-current protection circuit, sensor is adjusted circuit, bearing power regulating circuit, display circuit, circuit of measurement and control, cooling device, warning circuit and power resistive elements, described circuit of measurement and control respectively with bearing power regulating circuit, display circuit, power resistive elements, cooling device and warning circuit connect, described over-voltage over-current protection circuit and sensor circuit of adjusting is connected, described sensor circuit of adjusting is connected with bearing power regulating circuit, described bearing power regulating circuit is connected with power resistive elements.
The utility model passes through the design of DC ammeter and high-power resistance load unit, achieving DC current measurement scope is 10A ~ 1000A, utilize the current comparator of DC ammeter that the big current of input is become a small area analysis by the ratio of current comparator, and make it by the low load effect sampling resistor of a known value, produce a voltage drop, this voltage drop equivalence can go out a low value shunt with the ratio of the big current of input, again by DC voltage measuring instrument proportionally relation draw surveyed current value, efficiently solve D.C. high-current power supply and examine and determine problem of tracing to the source, direct current detection accuracy is made to reach 0.01 grade, meet existing regulatory requirements completely.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the schematic diagram of DC ammeter in the utility model.
Fig. 3 is the schematic diagram of simulating low resistance in DC ammeter.
Fig. 4 is the schematic diagram of high-power resistance load unit in the utility model.
Mark in figure: 1 is DC digital voltmeter; 2 is AC digital voltmeter; 3 is DC ammeter; 4 is high-power resistance load unit; 5 is D.C. high-current power supply, and 6 is simulation low resistance, and 7 is DC voltage measuring instrument; 8 is low load effect sampling resistor; 9 is sampling resistor load effect calibrating installation, and 10 is pressure current foldback circuit, and 11 to adjust circuit for sensor; 12 is bearing power regulating circuit; 13 is display circuit, and 14 is circuit of measurement and control, and 15 is cooling device; 16 is warning circuit, and 17 is power resistive elements.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, a kind of D.C. high-current power supply calibrating installation, comprise DC digital voltmeter 1, AC digital voltmeter 2, DC ammeter 3 and high-power resistance load unit 4, detected D.C. high-current power supply 5 is connected with DC digital voltmeter 1, AC digital voltmeter 2, DC ammeter 3 and high-power resistance load unit 4 respectively, described big current is 10A ~ 1000A, the project of this device calibrating mainly contains the error of indication of voltage, electric current, load regulation, output voltage short-term stability and ripple voltage.Wherein, AC digital voltmeter is for measuring the ripple of direct current power source voltage, and DC digital voltmeter is for measuring the voltage indicating value of direct supply, and existing AC and DC voltage table meets the calibrating requirement of D.C. high-current power supply.
As shown in Figures 2 and 3, described DC ammeter 3 comprises simulation low resistance 6 and DC voltage measuring instrument 7, described simulation low resistance 6 is combined by current comparator and low load effect sampling resistor 8, described low load effect sampling resistor 8 is connected with sampling resistor load effect calibrating installation 9, be benchmark by low load effect sampling resistor, this work standard shunt load characteristic is calibrated by sampling resistor load effect calibrating installation, determine its technical indicator, compensate and correct further, it is little that the work standard shunt of making reaches load factor, device used is few, volume is little, the effect that cost is low, described simulation low resistance 6 is connected with D.C. high-current power supply 5 and DC voltage measuring instrument 7 respectively, the big current of input is become a small area analysis by the ratio of current comparator by described current comparator, and make it by the low load effect sampling resistor of a known value, produce a voltage drop, this voltage drop equivalence can go out a low value shunt with the ratio of the big current of input, then by DC voltage measuring instrument 7 proportionally relation draw surveyed current value.Because current comparator has very high turn ratio accuracy, almost free from errorly small area analysis can be become by the big current of current comparator, and the low load effect sampling resistor of known value can be larger, to be beneficial to development, to be beneficial to a calibration value, the low value shunt realized with this technology is in accuracy and allow on the key indexs such as power far above shunt in kind in the past.In the present embodiment, the scope that described calibrating installation is used for large direct current measuring is 10A ~ 1000A, and described DC ammeter 3 has two groups, and correspondence detects 100A and 1000A two shelves respectively.
As shown in Figure 4, described high-power resistance load unit 4 comprises over-voltage over-current protection circuit 10, sensor is adjusted circuit 11, bearing power regulating circuit 12, display circuit 13, circuit of measurement and control 14, cooling device 15, warning circuit 16 and power resistive elements 17, described circuit of measurement and control 14 respectively with bearing power regulating circuit 12, display circuit 13, power resistive elements 17, cooling device 15 and warning circuit 16 connect, described over-voltage over-current protection circuit 10 and sensor circuit 11 of adjusting is connected, described sensor circuit 11 of adjusting is connected with bearing power regulating circuit 12, described bearing power regulating circuit 12 is connected with power resistive elements 17, described power resistive elements sealing is arranged in stainless-steel tube, steel pipe outside installs insulating radiation sheet additional, high-power blower installed by cabinet, carry out air blast cooling, and design overheated current foldback circuit, improve the reliability of heat radiation.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. a D.C. high-current power supply calibrating installation, it is characterized in that: comprise DC digital voltmeter (1), AC digital voltmeter (2), DC ammeter (3) and high-power resistance load unit (4), detected D.C. high-current power supply (5) respectively with DC digital voltmeter (1), AC digital voltmeter (2), DC ammeter (3) and high-power resistance load unit (4) connect, described DC ammeter (3) comprises simulation low resistance (6) and DC voltage measuring instrument (7), described simulation low resistance (6) is combined by current comparator and low load effect sampling resistor (8), described simulation low resistance (6) is connected with D.C. high-current power supply (5) and DC voltage measuring instrument (7) respectively, the big current of input is become a small area analysis by the ratio of current comparator by described current comparator, and make it by the low load effect sampling resistor of a known value, produce a voltage drop, this voltage drop equivalence can go out a low value shunt with the ratio of the big current of input, again by DC voltage measuring instrument (7) proportionally relation draw surveyed current value.
2. D.C. high-current power supply calibrating installation according to claim 1, it is characterized in that: the scope that described calibrating installation is used for large direct current measuring is 10A ~ 1000A, described DC ammeter (3) has two groups, and correspondence detects 100A and 1000A two shelves respectively.
3. D.C. high-current power supply calibrating installation according to claim 1, is characterized in that: described low load effect sampling resistor (8) is connected with sampling resistor load effect calibrating installation (9).
4. according to claim 1, D.C. high-current power supply calibrating installation described in 2 or 3, it is characterized in that: described high-power resistance load unit (4) comprises over-voltage over-current protection circuit (10), sensor is adjusted circuit (11), bearing power regulating circuit (12), display circuit (13), circuit of measurement and control (14), cooling device (15), warning circuit (16) and power resistive elements (17), described circuit of measurement and control (14) respectively with bearing power regulating circuit (12), display circuit (13), power resistive elements (17), cooling device (15) and warning circuit (16) connect, described over-voltage over-current protection circuit (10) and sensor circuit (11) of adjusting is connected, described sensor circuit (11) of adjusting is connected with bearing power regulating circuit (12), described bearing power regulating circuit (12) is connected with power resistive elements (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520973409.1U CN205229427U (en) | 2015-11-30 | 2015-11-30 | D.C. high -current power calibrating installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520973409.1U CN205229427U (en) | 2015-11-30 | 2015-11-30 | D.C. high -current power calibrating installation |
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| CN205229427U true CN205229427U (en) | 2016-05-11 |
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| CN201520973409.1U Expired - Fee Related CN205229427U (en) | 2015-11-30 | 2015-11-30 | D.C. high -current power calibrating installation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405464A (en) * | 2016-10-10 | 2017-02-15 | 国网四川省电力公司电力科学研究院 | Method for generating traceable random waveform analog power signals |
| CN107144797A (en) * | 2017-05-25 | 2017-09-08 | 中国核动力研究设计院 | A kind of high-power DC power supply debugging load under the conditions of high current |
| CN111308188A (en) * | 2020-03-31 | 2020-06-19 | 湖南省计量检测研究院 | High-precision direct-current electric energy meter metering device and method |
-
2015
- 2015-11-30 CN CN201520973409.1U patent/CN205229427U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405464A (en) * | 2016-10-10 | 2017-02-15 | 国网四川省电力公司电力科学研究院 | Method for generating traceable random waveform analog power signals |
| CN106405464B (en) * | 2016-10-10 | 2019-02-22 | 国网四川省电力公司电力科学研究院 | A kind of method for the random waveform simulated power signal that generation can trace to the source |
| CN107144797A (en) * | 2017-05-25 | 2017-09-08 | 中国核动力研究设计院 | A kind of high-power DC power supply debugging load under the conditions of high current |
| CN107144797B (en) * | 2017-05-25 | 2019-04-09 | 中国核动力研究设计院 | A kind of high-power DC power supply under the conditions of high current debugs load |
| CN111308188A (en) * | 2020-03-31 | 2020-06-19 | 湖南省计量检测研究院 | High-precision direct-current electric energy meter metering device and method |
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| 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: 20160511 Termination date: 20211130 |
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| CF01 | Termination of patent right due to non-payment of annual fee |