CN102981128B - Electromagnetic compatibility Passive Shape Control formula adjustable load circuits - Google Patents
Electromagnetic compatibility Passive Shape Control formula adjustable load circuits Download PDFInfo
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- CN102981128B CN102981128B CN201210486272.8A CN201210486272A CN102981128B CN 102981128 B CN102981128 B CN 102981128B CN 201210486272 A CN201210486272 A CN 201210486272A CN 102981128 B CN102981128 B CN 102981128B
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Abstract
The present invention relates to technical field of electromagnetic compatibility, be specifically related to electromagnetic compatibility Passive Shape Control formula adjustable load circuits and apply the casing of this circuit.Electromagnetic compatibility Passive Shape Control formula adjustable load circuits, wherein, comprise circuit general switch S1, DC current Table A, DC voltage Table V, the current regulating circuit be connected with DC current Table A, the control circuit be connected with DC current Table A, pull-up resistor RL, circuit general switch S1 connects the positive pole of tested power supply product, and circuit general switch S1 is connected with DC current Table A, DC voltage Table V respectively; Current regulating circuit connection control circuit; Pull-up resistor RL one end connection control circuit and current regulating circuit, the other end connects the negative pole of tested power supply product.Configure without the need to using additional power supply and get final product work, do not produce any electromagnetic radiation, with low cost, dependable performance, convenient and swift, Be very effective.
Description
Technical field
The present invention relates to technical field of electromagnetic compatibility, be specifically related to electromagnetic compatibility Passive Shape Control formula adjustable load circuits and apply the casing of this circuit.
Background technology
In electromagnetic compatibility test for the universal power supply product of miniwatt, often need artificial add with power supply product mark the suitable load of power, and to its contrast test under fully loaded, semi-load and unloaded three kinds of mode of operations respectively, the mode of operation finding out maximum electromagnetic disturbance radiation value is tested it.
Current existing common testing methods has two kinds,
The load of method one swept resistance.It by 1, reometer; 2, voltage table; 3, adjustable sliding resistor; 4, each wire etc. that connects forms a laod network, and the voltage output end mouth accessing tested power supply product provides a load, makes it normally work.
But there are following shortcomings and deficiencies: connect the end of a thread many, assembly is many, builds inconvenience, and it is unreliable to contact; Long section and the putting position consistance of wire harness are bad, and there is impact the position that wire harness is put on measurement result; Adjustable sliding resistor precision is low, debugs loaded down with trivial details, inefficiency; Test data reproduction degree is bad, test result out of true etc.
The load of method two active electronic.Active electronic load can provide an adjustable load to tested power supply product, makes its work.
But there are following shortcomings and deficiencies: though active electronic load can simply to test product with load debug, there is control circuit active load inside, needs access electrical network or utilizes alternate manner to power could to work.In harassing and wrecking test, because its active load self has electromagnetic disturbance, the test result of severe jamming test product; In immunity to interference test, very easily because load self circuit is interfered, and cause work abnormal, in especially showing that radiated immunity test and conducted immunity are tested.No matter be in electromagnetic disturbance project testing or electromagnetic immunity project testing, all there is emc issue that test result out of true even may cause because of load self and judge the underproof risk of test product by accident.
Summary of the invention
The technical matters that the present invention solves is to provide electromagnetic compatibility Passive Shape Control formula adjustable load circuits and applies the casing of this circuit, its circuit connection structure is simple, extraneous electromagnetic interference (EMI) can not be subject to and affect normal work, improve the precision of work efficiency and test result, the reproduction degree of test result is good.
For solving the problems of the technologies described above, the technical solution used in the present invention is: electromagnetic compatibility Passive Shape Control formula adjustable load circuits, wherein, comprise circuit general switch S1, DC current Table A, DC voltage Table V, the current regulating circuit be connected with DC current Table A, the control circuit be connected with DC current Table A, pull-up resistor RL, circuit general switch S1 connects the positive pole of tested power supply product, and circuit general switch S1 is connected with DC current Table A, DC voltage Table V respectively; Current regulating circuit connection control circuit; Pull-up resistor RL one end connection control circuit and current regulating circuit, the other end connects the negative pole of tested power supply product.Solve in the test of the miniwatt of electromagnetic compatibility universal power supply product because of emc issue that load brings, solve the impact on test result in electromagnetic disturbance test, simultaneously, in immunity to interference test, because of inner without control circuit, thus extraneous electromagnetic interference (EMI) can not be subject to and affect normal work.
Its internal circuit is simple for structure, the inner circuit very easily producing electromagnetic disturbance without logical circuit, on-off circuit, pulse generating circuit etc.In the technical program, load is adjustable, and without the need to accessing electrical network and configuring extra electric supply installation, namely the output port directly connecting tested power supply product forms service load, and the needs that the size of load is tested according to reality are adjustable.
Further, described current regulating circuit comprises the first triode Q1, the second triode Q2 and protection electric capacity C1, the base stage of the first triode Q1 connects the emitter of the second triode Q2, the collector of the first triode Q1 connects DC current Table A, and the emitter of the first triode Q1 connects pull-up resistor RL; The base stage connection control circuit of the second triode Q2, the collector of the second triode Q2 connects DC current Table A; C1 is in parallel with the first triode Q1 for protection electric capacity.
Further, described control circuit comprises the first resistance controller R1 and the second resistance controller R2, and first resistance controller R1 one end connects DC current Table A, and the other end connects the second resistance controller R2; Second resistance controller R2 one end connects the first resistance controller R1, and the other end connects the base stage of the second triode Q2.The first described resistance controller R1 is thick resistance controller, and the second described resistance controller R2 is thin resistance controller.By the size of the first resistance controller R1 and the second resistance controller R2 adjustable resistor, thus the size of regulating load electric current.
Further, the load voltage≤30V of adjustable load circuits, load current≤10A, Current adjustment precision is 10mA.By putting into practice and using checking, the load utilizing this circuit to build can meet voltage≤30V, the needs of the Miniature Power Unit electromagnetic compatibility test of electric current≤10A.
A kind of casing applying electromagnetic compatibility Passive Shape Control formula adjustable load circuits, wherein, comprise casing main body, be located at the portable handle of casing body top, be located at the negative power supply incoming end of casing body side, cathode power supply incoming end, be located at the voltage table display window of casing body surfaces, reometer display window, electric current coarse adjustment knob, electric current fine tuning knob and switch key.The voltage of output port and the electric current of load reading tested power supply product can be observed intuitively by voltage table display window and reometer display window; Conveniently can be regulated by electric current coarse adjustment knob and electric current fine tuning knob, effectively improve the precision of work efficiency and test result, the reproduction degree of test result is good.
Further, described negative power supply incoming end is located at cathode power supply incoming end top.Negative power supply incoming end connects the negative pole of tested power supply product, and cathode power supply incoming end connects the positive pole of tested power supply product.
Further, the middle part of casing body surfaces is located at by described electric current coarse adjustment knob and electric current fine tuning knob, and electric current fine tuning knob top is located at by electric current coarse adjustment knob.Described voltage table display window and reometer display window are symmetrically set in two ends, electric current coarse adjustment knob left and right.Casing main body is arranged knob, display window, switch key, its structure is simple, can regulate easily, clearly show.
Compared with prior art, beneficial effect is: the present invention mainly solves in the Miniature Power Unit test of electromagnetic compatibility, and the electromagnetic compatibility problem brought because of electric loading causes the impact on test result.Wire harness is few, position is fixed, debug convenience, measurement is accurate.Solve the electromagnetic compatibility problem that the load of active property brings well, active load self is exactly a radiation source, when harassing project testing, and interference measured result; When doing immunity to interference project testing, being vulnerable to outside electromagnetic interference and occurring operation irregularity.The technical program gets final product work without the need to using additional power supply to configure, and does not produce any electromagnetic radiation, with low cost, dependable performance, convenient and swift, Be very effective.
Accompanying drawing explanation
Fig. 1 is integral module structural representation of the present invention;
Fig. 2 is circuit connection structure schematic diagram of the present invention;
Fig. 3 is body structure schematic diagram of the present invention.
Embodiment
As shown in Figure 1, 2, electromagnetic compatibility Passive Shape Control formula adjustable load circuits, wherein, comprise circuit general switch S1, DC current Table A, DC voltage Table V, the current regulating circuit 1 be connected with DC current Table A, the control circuit 2 be connected with DC current Table A, pull-up resistor RL, circuit general switch S1 connects the positive pole of tested power supply product, and circuit general switch S1 is connected with DC current Table A, DC voltage Table V respectively; Current regulating circuit 1 connection control circuit 2; Pull-up resistor RL one end connection control circuit 2 and current regulating circuit 1, the other end connects the negative pole of tested power supply product.
Its internal circuit is simple for structure, the inner circuit very easily producing electromagnetic disturbance without logical circuit, on-off circuit, pulse generating circuit etc.In the technical program, load is adjustable, and without the need to accessing electrical network and configuring extra electric supply installation, namely the output port directly connecting tested power supply product forms service load, and the needs that the size of load is tested according to reality are adjustable.
Further, described current regulating circuit 1 comprises the first triode Q1, the second triode Q2 and protection electric capacity C1, the base stage of the first triode Q1 connects the emitter of the second triode Q2, the collector of the first triode Q1 connects DC current Table A, and the emitter of the first triode Q1 connects pull-up resistor RL; The collector of base stage connection control circuit 2, the second triode Q2 of the second triode Q2 connects DC current Table A; C1 is in parallel with the first triode Q1 for protection electric capacity.Protection electric capacity C1 can to circuit protection.
Further, described control circuit 2 comprises the first resistance controller R1 and the second resistance controller R2, and first resistance controller R1 one end connects DC current Table A, and the other end connects the second resistance controller R2; Second resistance controller R2 one end connects the first resistance controller R1, and the other end connects the base stage of the second triode Q2.By the size of the first resistance controller R1 and the second resistance controller R2 adjustable resistor, thus the size of regulating load electric current.
Further, the first described resistance controller R1 is thick resistance controller, and the second described resistance controller R2 is thin resistance controller.
Further, the load voltage≤30V of adjustable load circuits, load current≤10A, Current adjustment precision is 10mA.By putting into practice and using checking, the load utilizing this circuit to build can meet voltage≤30V, the needs of the Miniature Power Unit electromagnetic compatibility test of electric current≤10A.Current adjustment precision can arrive 10mA.
As shown in Figure 3, a kind of casing applying electromagnetic compatibility Passive Shape Control formula adjustable load circuits, wherein, comprise casing main body 10, be located at the portable handle 9 on casing main body 10 top, the negative power supply incoming end 7 being located at casing main body 10 sidepiece, cathode power supply incoming end 8, be located at the voltage table display window 3 on casing main body 10 surface, reometer display window 4, electric current coarse adjustment knob 5, electric current fine tuning knob 6 and switch key 11.Portable handle 9 can be used for portable casing, convenient mobile.Switch key 11 opens and closes for casing.
Described negative power supply incoming end 7 is located at cathode power supply incoming end 8 top.The middle part on casing main body 10 surface is located at by described electric current coarse adjustment knob 5 and electric current fine tuning knob 6, and electric current fine tuning knob 6 top is located at by electric current coarse adjustment knob 5.Described voltage table display window 3 is symmetrically set in electric current coarse adjustment knob about 5 two ends with reometer display window 4.Casing main body 10 is arranged knob, display window, switch key, its structure is simple, can regulate easily, clearly show.
Its specific works principle:
1, this device is correctly accessed the voltage output end of tested power supply product, two electric current coarse adjustment knobs 5 and electric current fine tuning knob 6 are counterclockwise transferred to the end.
2, press the switch key 11 of this casing, whether unanimously with the output voltage that tested power supply marks now observe voltage by the voltage table display window 3 on casing, if inconsistent, check whether exact connect ion.
3, according to mark by power supply maximum output current, electric current coarse adjustment knob 5 is regulated along time orientation, reometer display window 4 simultaneously on finder, be adjusted to tested power supply maximum output current value close, clockwise direction regulates electric current fine tuning knob 6 again, fine adjustment is to tested power supply maximum output current, and debugging completes, and starts test.
4, after having tested, two electric current coarse adjustment knobs 5 and electric current fine tuning knob 6 are counterclockwise transferred to the end, and shutdown switch button 11, test completes.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can do the improvement of some applicable actual conditions to the technical scheme of invention.Therefore, protection scope of the present invention is not limited thereto, and those of skill in the art are any to be included within scope based on non-material change in technical solution of the present invention.
Claims (3)
1. electromagnetic compatibility Passive Shape Control formula adjustable load circuits, it is characterized in that: comprise circuit general switch S1, DC current Table A, DC voltage Table V, the current regulating circuit (1) be connected with DC current Table A, the control circuit (2), the pull-up resistor RL that are connected with DC current Table A, circuit general switch S1 connects the positive pole of tested power supply product, and circuit general switch S1 is connected with DC current Table A, DC voltage Table V respectively; Current regulating circuit (1) connection control circuit (2); Pull-up resistor RL one end connection control circuit (2) and current regulating circuit (1), the other end of pull-up resistor RL is all connected the negative pole of tested power supply product with the other end of DC voltage Table V;
Described current regulating circuit (1) comprises the first triode Q1, the second triode Q2 and protection electric capacity C1, the base stage of the first triode Q1 connects the emitter of the second triode Q2, the collector of the first triode Q1 connects DC current Table A, and the emitter of the first triode Q1 connects pull-up resistor RL; The base stage connection control circuit (2) of the second triode Q2, the collector of the second triode Q2 connects DC current Table A; C1 is in parallel with the first triode Q1 for protection electric capacity;
Described control circuit (2) comprises the first resistance controller R1 and the second resistance controller R2, and first resistance controller R1 one end connects DC current Table A, and the other end connects the second resistance controller R2; Second resistance controller R2 one end connects the first resistance controller R1, and the other end connects the base stage of the second triode Q2.
2. electromagnetic compatibility Passive Shape Control formula adjustable load circuits according to claim 1, it is characterized in that: the first described resistance controller R1 is thick resistance controller, the second described resistance controller R2 is thin resistance controller.
3. electromagnetic compatibility Passive Shape Control formula adjustable load circuits according to claim 1, it is characterized in that: the load voltage≤30V of adjustable load circuits, load current≤10A, Current adjustment precision is 10mA.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210486272.8A CN102981128B (en) | 2012-11-26 | 2012-11-26 | Electromagnetic compatibility Passive Shape Control formula adjustable load circuits |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210486272.8A CN102981128B (en) | 2012-11-26 | 2012-11-26 | Electromagnetic compatibility Passive Shape Control formula adjustable load circuits |
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| CN102981128A CN102981128A (en) | 2013-03-20 |
| CN102981128B true CN102981128B (en) | 2015-08-12 |
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| CN201210486272.8A Active CN102981128B (en) | 2012-11-26 | 2012-11-26 | Electromagnetic compatibility Passive Shape Control formula adjustable load circuits |
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| CN109116265B (en) * | 2018-07-25 | 2021-02-02 | 苏州浪潮智能科技有限公司 | Method and system for processing full-load power-on abnormal oscillation during power module overshoot test |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201576009U (en) * | 2009-12-31 | 2010-09-08 | 重庆朗天通讯设备有限公司 | Alternating-current/direct-current load box |
| CN202995005U (en) * | 2012-11-26 | 2013-06-12 | 广州广电计量检测股份有限公司 | Electromagnetic compatibility passive control type adjustable load circuit and box body applying same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6614231B2 (en) * | 2001-08-21 | 2003-09-02 | Maxwell Technologies, Inc. | High efficiency electronic load |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201576009U (en) * | 2009-12-31 | 2010-09-08 | 重庆朗天通讯设备有限公司 | Alternating-current/direct-current load box |
| CN202995005U (en) * | 2012-11-26 | 2013-06-12 | 广州广电计量检测股份有限公司 | Electromagnetic compatibility passive control type adjustable load circuit and box body applying same |
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Address after: 511400 150, No. 8, Qishan Road, Shiqi Town, Panyu District, Guangzhou City, Guangdong Province Patentee after: Radio and TV Measurement and Testing Group Co.,Ltd. Address before: 510656 Guangdong city of Guangzhou province Whampoa Avenue Tianhe District Xiping Yun Road No. 163 Patentee before: GUANGZHOU GRG METROLOGY & TEST Co.,Ltd. |
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