CN102279293A - Digital-analog compatible controlled electronic load - Google Patents
Digital-analog compatible controlled electronic load Download PDFInfo
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- CN102279293A CN102279293A CN201110071397XA CN201110071397A CN102279293A CN 102279293 A CN102279293 A CN 102279293A CN 201110071397X A CN201110071397X A CN 201110071397XA CN 201110071397 A CN201110071397 A CN 201110071397A CN 102279293 A CN102279293 A CN 102279293A
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Abstract
A digital-analog compatible controlled electronic load comprises an active discharge load unit which includes an operational amplifier and a bipolar transistor which is connected with a following resistor or a metal oxide semiconductor field effect transistor (MOSFET). The electronic load is used to perform discharge to an electrified body. The electronic load is characterized in that: the electronic load comprises at least one group of load units which possess a same circuit structure or the approximately same structure; each group of load units is respectively provided with an independent input terminal and an mutually shared output terminal and the output terminal is connected with the electrified body; the each group of load units is also respectively provided with the operational amplifier which is connected with an negative feedback resistor and an input circuit which formed by a photoelectric coupler cascade connected with an output resistor. The electronic load of the invention can totally or partially form an adaptive connection with an input digit signal source or a simulation signal source. The electronic load can flexibly form loads with different waveforms, different power and different purposes and possess an input-output isolation function. Therefore, the electronic load is convenient for usage and can be widely used in high voltage, power and electric power component tests of energy and experiment instrument fields.
Description
Technical field
The present invention relates to electronic load, particularly relate to a kind of electronic load of DA compatibility control.
Background technology
When electrified body and power supply, battery, capacitance body are carried out the load characteristic test, generally need electronic load that electrified body is discharged, so that experimenter's contact electrification body is eliminated the personal safety problem.Existing electronic load function is simple, belongs to constant current, constant-resistance or permanent universal power pattern mostly, and a large amount of electronic load that uses as shown in Figure 4, and this electronic load is by operational amplifier OP
1Follow resistance R with being connected with
S1Bipolarity triode or metal oxide semiconductor field effect tube (Metal Oxide Semicoductor Field Effect Transistor, initialism is MOSFET) Q
1Active discharge load is formed in cascade, by the input voltage Control current load is discharged.The defective of this circuit mainly is: high power discharge needs multitube parallel; In a single day semiconductor devices Q1 lost efficacy, and can't limit discharge current; And must be adaptive connection input simulation signal generator, can not adaptive connection supplied with digital signal source; For being difficult to satisfy measurement requirement such as occasions such as high pressure, special discharge waveforms.In addition, the existing commercial electronic load that possesses the digital programmable function individually can satisfy measurement requirement, but need meet some communications protocol and adopt data bus.
Summary of the invention
Technical matters to be solved by this invention is the defective that remedies above-mentioned prior art, and a kind of electronic load of DA compatibility control is provided.
Technical matters of the present invention is solved by the following technical programs.
The electronic load of this DA compatibility control, comprise by an operational amplifier and and be connected with bipolarity triode or metal oxide semiconductor field effect tube (the MetalOxide Semicoductor Field Effect Transistor that follows resistance, initialism is MOSFET) active discharge load unit that cascade is formed, be used for electrified body is discharged.
The characteristics of the electronic load of this DA compatibility control are:
Comprise the identical or approximately uniform at least one group of load unit of circuit structure.
Each is organized load unit and is respectively equipped with separately independently input end and shared output terminal mutually, and described output terminal is connected with described electrified body.
Each is organized load unit and also is respectively equipped with by an operational amplifier and that is connected with negative feedback resistor and is connected with the input circuit that the photoelectrical coupler cascade of output resistance is formed, the input end of described input circuit is connected with digital signal corresponding source or/and simulation signal generator, the output terminal of described input circuit is connected with the input end of the corresponding active discharge load unit of load unit on the same group, described operational amplifier and the described negative feedback resistor that is connected with negative feedback resistor formed output and imported the voltage that keeps the linear ratio relation, described photoelectrical coupler and described output resistance are formed the current/voltage-converted circuit, and electrical isolation is provided.
Technical matters of the present invention is solved by following further technical scheme.
The described load unit of respectively organizing also is respectively equipped with output current limiting resistance, one end of described output current limiting resistance is connected with the output terminal of the corresponding active discharge load unit of load unit on the same group, and the other end of described output current limiting resistance is connected with the described mutual shared output terminal of respectively organizing load unit.Described output current limiting resistance is used for current-limiting protection is carried out in the output of described bipolarity triode or MOSFET, and shares its part power, improves the power density of active discharge load unit, improves its output performance.
It is R that the resistance of each output current limiting resistance of described at least one group of load unit is followed successively by general term
XL* 2
N-1Increase progressively geometric progression, with whole adaptive connection supplied with digital signal source, wherein R
XLBe the resistance of the output current limiting resistance of first group of load unit, n is the group number of load unit.
It is R that the resistance of the part output current limiting resistance of described at least one group of load unit is followed successively by general term
XL* 2
N-1Increase progressively geometric progression, with the adaptive connection supplied with digital signal of part source, the adaptive connection input of remainder simulation signal generator, wherein R
XLBe the resistance of the output current limiting resistance of first group of load unit, n is the group number of load unit.
It is R that the resistance that each of described at least one group of load unit followed resistance is followed successively by general term
GS* (1/2
N-1)=R
GS÷ 2
N-1The geometric progression of successively decreasing, with whole adaptive connection supplied with digital signal source, wherein R
GSBe the resistance of following resistance of first group of load unit, n is the group number of load unit.
It is R that the resistance that the part of described at least one group of load unit is followed resistance is followed successively by general term
GS* (1/2
N-1)=R
GS÷ 2
N-1The geometric progression of successively decreasing, with the adaptive connection supplied with digital signal of part source, the adaptive connection of remainder input simulation signal generator, wherein R
GSBe the resistance of following resistance of first group of load unit, n is the group number of load unit.
The circuit structure of described at least one group of load unit is identical, is that the connection and the component parameter thereof of circuit is identical.
The circuit structure of described at least one group of load unit is approximate identical, is that the connection of circuit is identical and component parameter is slightly different.
Technical matters of the present invention is solved by following further again technical scheme.
Described photoelectrical coupler is a kind of in precision photoelectric coupler and the digital light electric coupler, and the former is used for adaptive connection low rate operation circuit, and the latter is used for the supplied with digital signal source of adaptive connection two-forty operation.
Described derived digital signal is transistor-transistor logic (Transistor-Transistor Logic, initialism is TTL) standardized digital signal source and complementary metal oxide semiconductor (CMOS) be a kind of in (Complementary Metal Oxide Semiconductor, initialism is CMOS) standardized digital signal source.
Described simulation signal generator is the simulation signal generator of arbitrary parameter, and described parameter comprises voltage, frequency and phase place.
Described electrified body is at least a in power supply, battery and the capacitance body.
The beneficial effect that the present invention is compared with the prior art is:
Electronic load of the present invention can all or part of adaptive connection supplied with digital signal source or simulation signal generator, can very flexible composition different wave, the load of different capacity, different purposes, also has the input and output isolation features, easy to use, can be widely used in the energy and high pressure, power, electric power, the component testing of testing the instrument field.
Description of drawings
Fig. 1 is the circuit composition diagram of the specific embodiment of the invention;
Fig. 2 is the enlarged drawing of input circuit unit of first group of load unit of Fig. 1;
Fig. 3 is the enlarged drawing that the active discharge load unit of first group of load unit of Fig. 1 is connected with output current limiting resistance;
Fig. 4 is the circuit composition diagram of a kind of electronic load of prior art.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention will be described.
A kind of electronic load of the DA compatibility control shown in Fig. 1 ~ 3, comprise the identical or approximately uniform N group of circuit structure load unit (N is the positive integer more than or equal to 2), each is organized load unit and is respectively equipped with separately independently input end and shared output terminal mutually, and shared output terminal is connected with electrified body mutually.
Wherein first group of load unit comprises by an operational amplifier OP1 and and is connected with the active discharge load unit that the bipolarity triode Q1 cascade of following resistance R S1 is formed, and is used for electrified body is discharged.Electrified body is at least a in power supply, battery and the capacitance body.
Wherein first group of load unit is provided with by an operational amplifier OP2 and who is connected with negative feedback resistor R2 and is connected with the input circuit that the photoelectrical coupler OF1 cascade of output resistance R2 is formed, the input end of input circuit is connected with digital signal corresponding source or/and simulation signal generator, the output terminal of input circuit is connected with the input end of the corresponding active discharge load unit of first group of load unit, operational amplifier OP2 and negative feedback resistor R2 form output and keep linear ratio relation's voltage with input, photoelectrical coupler OF1 and output resistance R2 form the current/voltage-converted circuit, and electrical isolation is provided.Photoelectrical coupler OF1 is a kind of in precision photoelectric coupler and the digital light electric coupler, and the former is used for adaptive connection low rate operation circuit, and the latter is used for the supplied with digital signal source of adaptive connection two-forty operation.
Wherein first group of load unit also is provided with output current limiting resistance R D1, the end of output current limiting resistance R D1 is connected with the output terminal of the corresponding active discharge load unit of first group of load unit, and the other end of output current limiting resistance R D1 is connected with the mutual shared output terminal of first group of load unit.Output current limiting resistance R D1 is used for current-limiting protection is carried out in the output of bipolarity triode Q1, and shares its part power, improves the power density of active discharge load unit, improves its output performance.
Derived digital signal is a kind of in TTL standardized digital signal source and the CMOS standardized digital signal source.
Simulation signal generator is the simulation signal generator of arbitrary parameter, and these parameters comprise voltage, frequency and phase place.
It is R that the resistance of all or part of output current limiting resistance R Di of N group load unit is followed successively by general term
XL* 2
N-1Increase progressively geometric progression, with all or part of adaptive connection supplied with digital signal source, wherein R
XLBe the resistance of the output current limiting resistance of first group of load unit, i is the load unit sequence number that sorts successively.
It is R that all or part of resistance of following resistance R Si of N group load unit is followed successively by general term
GS* (1/2
N-1)=R
GS÷ 2
N-1The geometric progression of successively decreasing, with all or part of adaptive connection supplied with digital signal source, wherein R
GSBe the resistance of following resistance of first group of load unit, i is the load unit sequence number that sorts successively.
The circuit structure of N group load unit is identical, is that the connection and the component parameter thereof of circuit is identical.
The circuit structure of N group load unit is approximate identical, is that the connection of circuit is identical and component parameter is slightly different.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention; make some alternative or obvious modification that are equal to without departing from the inventive concept of the premise; and performance or purposes are identical, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of being submitted to.
Claims (9)
1. the electronic load of DA compatibility control, comprise by an operational amplifier and and be connected with the active discharge load unit that the bipolarity triode of following resistance or metal oxide semiconductor field effect tube MOSFET cascade are formed, be used for electrified body is discharged, it is characterized in that:
Comprise the identical or approximately uniform at least one group of load unit of circuit structure;
Each is organized load unit and is respectively equipped with separately independently input end and shared output terminal mutually, and described output terminal is connected with described electrified body;
Each is organized load unit and also is respectively equipped with by an operational amplifier and that is connected with negative feedback resistor and is connected with the input circuit that the photoelectrical coupler cascade of output resistance is formed, the input end of described input circuit is connected with digital signal corresponding source or/and simulation signal generator, the output terminal of described input circuit is connected with the input end of the corresponding active discharge load unit of load unit on the same group, described operational amplifier and the described negative feedback resistor that is connected with negative feedback resistor formed output and imported the voltage that keeps the linear ratio relation, described photoelectrical coupler and described output resistance are formed the current/voltage-converted circuit, and electrical isolation is provided.
2. the electronic load of DA compatibility control as claimed in claim 1 is characterized in that:
The described load unit of respectively organizing also is respectively equipped with output current limiting resistance, one end of described output current limiting resistance is connected with the output terminal of the corresponding active discharge load unit of load unit on the same group, and the other end of described output current limiting resistance is connected with the described mutual shared output terminal of respectively organizing load unit.
3. the electronic load of DA compatibility control as claimed in claim 1 or 2 is characterized in that:
It is R that the resistance of each output current limiting resistance of described at least one group of load unit is followed successively by general term
XL* 2
N-1Increase progressively geometric progression, with whole adaptive connection supplied with digital signal source, wherein R
XLBe the resistance of the output current limiting resistance of first group of load unit, n is the group number of load unit;
It is R that the resistance of the part output current limiting resistance of described at least one group of load unit is followed successively by general term
XL* 2
N-1Increase progressively geometric progression, with the adaptive connection supplied with digital signal of part source, the adaptive connection input of remainder simulation signal generator, wherein R
XLBe the resistance of the output current limiting resistance of first group of load unit, n is the group number of load unit.
4. the electronic load of DA compatibility control as claimed in claim 3 is characterized in that:
It is R that the resistance that each of described at least one group of load unit followed resistance is followed successively by general term
GS÷ 2
N-1The geometric progression of successively decreasing, with whole adaptive connection supplied with digital signal source, wherein R
GSBe the resistance of following resistance of first group of load unit, n is the group number of load unit;
It is R that the resistance that the part of described at least one group of load unit is followed resistance is followed successively by general term
GS÷ 2
N-1The geometric progression of successively decreasing, with the adaptive connection supplied with digital signal of part source, the adaptive connection of remainder input simulation signal generator, wherein R
GSBe the resistance of following resistance of first group of load unit, n is the group number of load unit.
5. the electronic load of DA compatibility control as claimed in claim 4 is characterized in that:
The circuit structure of described at least one group of load unit is identical, is that the connection and the component parameter thereof of circuit is identical;
The circuit structure of described at least one group of load unit is approximate identical, is that the connection of circuit is identical and component parameter is slightly different.
6. the electronic load of DA compatibility control as claimed in claim 5 is characterized in that:
Described photoelectrical coupler is a kind of in precision photoelectric coupler and the digital light electric coupler.
7. the electronic load of DA compatibility control as claimed in claim 6 is characterized in that:
Described derived digital signal is a kind of in transistor-transistor logic TTL standardized digital signal source and the complementary metal oxide semiconductor (CMOS) CMOS standardized digital signal source.
8. the electronic load of DA compatibility control as claimed in claim 7 is characterized in that:
Described simulation signal generator is the simulation signal generator of arbitrary parameter, and described parameter comprises voltage, frequency and phase place.
9. the electronic load of DA compatibility control as claimed in claim 8 is characterized in that:
Described electrified body is at least a in power supply, battery and the capacitance body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110071397XA CN102279293A (en) | 2011-03-24 | 2011-03-24 | Digital-analog compatible controlled electronic load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110071397XA CN102279293A (en) | 2011-03-24 | 2011-03-24 | Digital-analog compatible controlled electronic load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102279293A true CN102279293A (en) | 2011-12-14 |
Family
ID=45104854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110071397XA Pending CN102279293A (en) | 2011-03-24 | 2011-03-24 | Digital-analog compatible controlled electronic load |
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| Country | Link |
|---|---|
| CN (1) | CN102279293A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818918A (en) * | 2012-08-07 | 2012-12-12 | 深圳睿立方智能科技有限公司 | Load equipment for testing power of data center machine room |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201563279U (en) * | 2009-11-23 | 2010-08-25 | 东莞市里奥电子实业有限公司 | Load constant power circuit of HID lamp electronic ballast |
| CN201667616U (en) * | 2010-03-29 | 2010-12-08 | 比亚迪股份有限公司 | Multiple power supply load circuit |
| CN101949962A (en) * | 2010-05-27 | 2011-01-19 | 东莞市锐源仪器有限公司 | Programmable electronic load |
-
2011
- 2011-03-24 CN CN201110071397XA patent/CN102279293A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201563279U (en) * | 2009-11-23 | 2010-08-25 | 东莞市里奥电子实业有限公司 | Load constant power circuit of HID lamp electronic ballast |
| CN201667616U (en) * | 2010-03-29 | 2010-12-08 | 比亚迪股份有限公司 | Multiple power supply load circuit |
| CN101949962A (en) * | 2010-05-27 | 2011-01-19 | 东莞市锐源仪器有限公司 | Programmable electronic load |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818918A (en) * | 2012-08-07 | 2012-12-12 | 深圳睿立方智能科技有限公司 | Load equipment for testing power of data center machine room |
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Application publication date: 20111214 |