CN101968503A - Load circuit and load testing device with same - Google Patents
Load circuit and load testing device with same Download PDFInfo
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- CN101968503A CN101968503A CN 201010280762 CN201010280762A CN101968503A CN 101968503 A CN101968503 A CN 101968503A CN 201010280762 CN201010280762 CN 201010280762 CN 201010280762 A CN201010280762 A CN 201010280762A CN 101968503 A CN101968503 A CN 101968503A
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Abstract
The invention provides a load circuit and a load testing device with the same, belonging to the technical field of power supply load testing. The invention can solve the problem of high cost of the traditional power supply load testing technology. The load circuit comprises two end parts, and at least two load units for supplying loads for the load circuit are connected in series or in parallel between the two end parts, wherein a switching unit for leading a short circuit or open circuit between two ends of the load units is connected between the two ends of the load units connected in series, and a switching unit for connecting or disconnecting a branch is connected in series on the branch where the parallel load units are located. The load testing device comprises the load circuit. The load testing device can be used for testing the loads of different power supplies.
Description
Technical field
The present invention relates to the power source loads technical field of measurement and test, relate in particular to load circuit and have the load testing device of this load circuit.
Background technology
Load testing device (as load box, load cabinet) is mainly used in power-supply devices such as power panel, accumulator, generator is carried out load testing, it can provide certain load capacity (as ohmic load, inductive load, capacitive load etc.), thereby the load state of analog power equipment when practical application, the testing power supply performance.For example, light emitting diode (LED) load testing device can be used for testing the LED power source plate of light emitting diode liquid crystal indicator, comprise load circuit in the existing LED load proving installation, load circuit has and is used for two ends linking to each other with LED power source plate output terminal, at the light emitting diode that is in series with some between both ends (because light emitting diode has the constant special characteristics of pressure drop when electric current changes, therefore it is difficult to be substituted by other elements such as resistance, so directly represent different loads with the light emitting diode of varying number usually).
The inventor finds that there are the following problems at least in the prior art: for different power supplys (as the LED power source plate of different light emitting diode liquid crystal indicators), the way of its output, the load size (as the number of light emitting diode) that the output of every road requires is also different, and the load capacity that existing load testing device provides (as the number of light emitting diode) is certain, each load testing device only is applicable to a kind of power supply, therefore in the time will carrying out load testing to different power supplys, will use different load testing devices, thereby cause the cost of power source loads test too high.
Summary of the invention
Embodiments of the invention provide a kind of load circuit, the cost of its load testing capable of reducing power source.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of load circuit comprises two ends, and also satisfies:
The load unit that has at least two series connection between the both ends of described load circuit, described load unit are used to described load circuit that load is provided; Wherein have at least between the two ends of a load unit to be connected with switch unit, described switch unit is used for short circuit between the two ends of described load unit or opens circuit;
Or,
Have at least two load in parallel unit between the both ends of described load circuit, described load unit is used to described load circuit that load is provided; And have at least on the branch road at a load unit place to be in series with switch unit, described switch unit is used for the branch road conducting at described load unit place or opens circuit.
Wherein, load unit is the electrical units of the electrical load that can provide certain, and each load unit is formed by certain electricity component (as electric capacity, resistance, inductance, light emitting diode etc.).
Owing to have switch unit in the load circuit of embodiments of the invention, this switch unit can insert the load of load unit load circuit or break from load circuit, therefore this load circuit can provide different loads, be applicable to different power supplys, thus the cost of load testing capable of reducing power source.
Embodiments of the invention also provide a kind of load testing device, the cost of its load testing capable of reducing power source, and easy to use.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of load testing device, it comprises the load circuit that at least one is above-mentioned.
Owing to have above-mentioned load circuit in the load testing device of embodiments of the invention, so it can provide different loads, is applicable to multiple different power supply, thereby can reduces the required number of devices of power source loads test, reduces the cost of power source loads test; Simultaneously owing to needn't change load testing device when different electrical power is tested, so it is easy to use.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the circuit diagram of the load circuit of the embodiment of the invention one;
Fig. 2 is the circuit diagram of the load circuit of the embodiment of the invention two;
Fig. 3 is the circuit diagram of the load circuit of the embodiment of the invention three;
Fig. 4 is the circuit diagram of the load circuit of the embodiment of the invention four;
Fig. 5 is the circuit diagram of the load circuit of the embodiment of the invention five;
Fig. 6 is the structural representation of the load testing device of the embodiment of the invention six;
Fig. 7 is the structural representation of the load testing device of the embodiment of the invention seven;
Fig. 8 is the process flow diagram of the power source loads method of testing of the embodiment of the invention eight;
Fig. 9 is the process flow diagram of the power source loads method of testing of the embodiment of the invention nine.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme of the embodiment of the invention is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, all other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belong to the scope of protection of the invention.
Embodiment one
The embodiment of the invention provides a kind of load circuit, and as shown in Figure 1, it comprises two ends 1, has the load unit 2 of at least two series connection between two ends 1, and load unit 2 is used to load circuit that load is provided; And have at least between the two ends of a load unit 2 to be connected with switch unit 3, this switch unit 3 is used for short circuit between the two ends of load unit 2 or opens circuit.
Owing to have switch unit 3 in the load circuit of embodiments of the invention, thereby switch unit 3 can make two terminal shortcircuits of load unit 2 the load reality of this load unit 2 not insert in the load circuit, so this load circuit can provide different loads, be applicable to different power supplys, thus the cost of load testing capable of reducing power source.
Embodiment two
The embodiment of the invention provides a kind of load circuit, and as shown in Figure 2, it comprises two ends 1, has at least two load in parallel unit 2 between two ends 1, and load unit 2 is used to load circuit that load is provided; And have at least on the branch road at load unit 2 places to be in series with switch unit 3, this switch unit 3 is used for the branch road conducting at load unit 2 places or opens circuit.
Owing to have switch unit 3 in the load circuit of embodiments of the invention, thereby switch unit 3 can make the branch circuit break at load unit 2 places the load reality of this load unit 2 not insert in the load circuit, so this load circuit can provide different loads, be applicable to different power supplys, thus the cost of load testing capable of reducing power source.
Embodiment three
The embodiment of the invention provides a kind of load circuit, as shown in Figure 3, it comprises two ends 1, load unit (being the LED load unit) 2-1,2-2,2-3,2-4 that four series connection are arranged between two ends 1, respectively comprise the light emitting diode D of 20,10,5 and 2 series connection respectively among 4 load unit 2-1,2-2,2-3, the 2-4, thereby different loads (being the light emitting diode D of varying number) is provided.
Between the two ends of each LED load unit 2-1,2-2,2-3,2-4, all be connected with a relay (being switch unit) K1, K2, K3, K4, in other words each LED load unit 2-1,2-2,2-3,2-4 all respectively with have a relay K 1, K2, K3, K4 in parallel.When relay K 1, K2, K3, K4 conducting, they can be with two terminal shortcircuits of corresponding load unit 2-1,2-2,2-3,2-4, thereby the load reality of this load unit 2-1,2-2,2-3,2-4 does not exert an influence to load circuit; And when relay K 1, K2, K3, K4 disconnection, its corresponding load unit 2-1,2-2,2-3,2-4 then play the effect that load is provided for load circuit.Therefore, can make load circuit that different loads is provided by the break-make situation of selecting each relay K 1, K2, K3, K4, it can obtain the different load state of 24-1=15 kind (thereby will remove the situation that whole relay K 1, K2, K3, the whole conductings of K4 make the direct short-circuit of load circuit two ends) altogether; For example, relay K 2, K3 disconnect and when other relay K 1, K4 conducting, the load that can produce 15 light emitting diode D, and when relay K 4 disconnections but other relay K 1, K2, K3 all during conducting, the load that then can produce 5 light emitting diode D.
Wherein, why the light emitting diode D quantity among four load unit 2-1,2-2,2-3, the 2-4 being chosen as above-mentioned value, is to determine according to the actual loading situation of existing LED power source plate.Because existing LED power source plate mainly contains two kinds, a kind of liquid crystal indicator that is used for below 24 cun, it comprises 16 tunnel outputs at most, 15 light emitting diodes of maximum loads are exported on every road, another kind is used for the liquid crystal indicator more than 26 cun, it comprises 6 tunnel outputs at most, and 70 light emitting diodes of maximum loads are exported on every road; Therefore, select the light emitting diode D quantity of each load unit 2-1,2-2,2-3,2-4 can guarantee under the situation of using less relay K 1, K2, K3, K4, to provide the loading condition (, can will test after two load circuit series connection) that is applicable to the LED power source plate as much as possible according to above-mentioned method for the LED power source plate of every road output more than 37.
This load circuit also comprises the control module 11 that links to each other with each relay K 1, K2, K3, K4, this control module 11 can (for example send control signal to each relay K 1, K2, K3, K4 according to operator's order, current relay K1, K2, K3, K4 are then sent current controling signal), thereby automatically adjust the actual loading of load circuit, the convenient use.
Embodiment four
The embodiment of the invention provides a kind of load circuit, as shown in Figure 4, it comprises two ends 1, be in series with two resistance (being the ohmic load unit) R1, R2 and an inductance (being the inductive load unit) L between two ends 1, between the two ends of resistance R 1, be connected with switch (being switch unit) S1, between the two ends of inductance L, be connected with switch S 2.Whether can determine the load of resistance R 1 and inductance L is inserted in the load circuit by the break-make of adjusting switch S 1, S2, thereby provide different loads for load circuit; Wherein because resistance R 2 two ends do not have switch (being switch unit), so it is connected in the load circuit always.
Embodiment five
The embodiment of the invention provides a kind of load circuit, as shown in Figure 5, it comprises two ends 1, two 1 of ends have resistance (being ohmic load) R3 and the capacitor cell of series connection, this capacitor cell comprises three load in parallel unit, wherein two are electric capacity (being the capacitive load unit) C1, C2, and another is by a capacitor C 3 and load unit (the being the mixed load unit) 2-5 that resistance S4 is composed in series.Between the two ends of resistance R 3, be connected with switch (being switch unit) S3, and respectively be in series with a switch S 4, S5, S6 in three branch roads of capacitor cell.By switching on or off switch S 4, S5, S6, can make the branch road at capacitor C 1, C2 and load unit 2-5 place connect or open circuit, thereby whether control insert load circuit with the load of capacitor C 1, C2 and load unit 2-5; And by switching on or off switch S 3, whether then can determine the load of resistance R 3 is inserted load circuit.
Obviously, the various embodiments described above show that load circuit of the present invention can have many different concrete forms.For example, the load unit in the load circuit can be a same type, also can be dissimilar; Load unit can be a discrete component, also can be formed by a plurality of identical or different elements combination; Each load unit in the load circuit can also can have only the fractional load unit to switch unit should be arranged all to switch unit should be arranged; Load unit in the load circuit can be all series connection or all in parallel, the also series connection that can have, the parallel connection that has.
Obviously, the load circuit of the various embodiments described above also can carry out many variations.For example: also can comprise other element in the load unit, as electrothermal tube, loudspeaker etc.; Control module can be subjected to the control of computer; Also can not adopt control module, and manually control each switch unit etc.
Embodiment six
The embodiment of the invention provides a kind of load testing device 6, and as shown in Figure 6, it comprises that at least one is as the described load circuit 7 of above-mentioned any embodiment.
Owing to have above-mentioned load circuit 7 in the load testing device 6 of embodiments of the invention, therefore it can provide different loads, be applicable to multiple different power supply, thereby can reduce the required number of devices of power source loads test, reduce the cost of power source loads test; Owing to when different electrical power is tested, changing load testing device, therefore easy to use simultaneously.
Embodiment seven
The embodiment of the invention provides a kind of load testing device (as load box) 6, as shown in Figure 7, it comprise 16 the foregoing descriptions, three described load circuits 7 (because of load circuit 7 quantity too much, so in Fig. 7, only show 4), the both ends 1 of every load circuit 7 all can link to each other with one tunnel output of LED power source plate by access unit 5, so that the LED power source plate is carried out load testing.Wherein access unit 5 can be and has a plurality of circuit boards that are used for exporting with each road of LED power source plate the output terminal that links to each other, and each output terminal all is connected with an end 1 of a load circuit 7.
By using linkage unit 8, can make the load testing device 6 of present embodiment be applicable to all existing LED power source plates, and can test (being generally test one by one in the prior art) simultaneously to the multichannel output of LED power source plate, to guarantee precision of test result.For example, for a LED power source plate that 14 tunnel outputs, 12 light emitting diodes of every road output load are arranged, whole linkage units 8 in the load testing device 6 all can be disconnected, and relay K 1, K3 in wherein 14 load circuits 7 are communicated with, relay K 2, K4 disconnect, thereby make every load circuit 7 that the LED load of 12 series connection is provided, by access unit 5 these 14 load circuits 7 are linked to each other to test with 14 tunnel outputs of LED power source plate respectively again; For another example, for a LED power source plate that 6 tunnel outputs, 70 light emitting diodes of every road output load are arranged, can be with 6 linkage unit conductings in the load testing device 6, obtain 6 combination load circuit 4, and with two relay K 4 conductings in every combination load circuit 4, and other 6 relay K 1, K2, K3 all disconnect, thereby make every combination load circuit 4 that the LED load of 70 series connection all is provided, by access unit 5 these combination load circuit 4 are linked to each other to test with 6 tunnel outputs of LED power source plate respectively again.
By many as above-mentioned embodiment three described load circuit 7 and linkage units 8 are set in load testing device 6, can make load testing device 6 be applicable to whole existing LED power source plates, and can test simultaneously each road output of LED power source plate.And by using control module 9 and display unit 10, then the load of every load circuit 7 in the regulating load proving installation 6 automatically makes its requirement that adapts to different LED power source plates, and test result can be shown automatically, thereby make test process realize robotization, handled easily.
Obviously, the load testing device of the various embodiments described above also can carry out many variations.For example: control module also can be distinguished the switch unit of controlling independently in each load circuit; Control module also can be controlled each linkage unit; Linkage unit can be cascaded three or more load circuits; Linkage unit also can be connected in parallel many load circuits; Also can comprise in the load testing device and be used to test result processing unit of storing, analyze, outputing test result etc.
Embodiment eight
The embodiment of the invention provides a kind of power source loads method of testing, and as shown in Figure 8, this method comprises:
Switching device shifter at least one described load circuit of the load testing device of S01, adjustment the foregoing description six makes described load circuit that first load is provided.
S02, the described both ends of the load circuit of first load that provide are linked to each other with the output terminal of power supply.
S03, open described power supply and carry out load testing.
Because adopting above-mentioned load testing device in the power source loads method of testing of embodiments of the invention tests, therefore in the time of can using same load testing device that different power supplys is tested, thereby can reduce the required number of devices of power source loads test, reduce the cost of power source loads test.
Embodiment nine
The embodiment of the invention provides a kind of power source loads method of testing (load testing with the LED power source plate is an example), and as shown in Figure 9, this method comprises:
S11, according to the output way of the LED power source plate of required test and the predetermined output load on every road, adjust the load that each load circuit provided (being the light emitting diode number) in the foregoing description seven described load testing devices, it is provided and be scheduled to the load that output load equates; Wherein, adjustment can be undertaken by handling control module and linkage unit: select whether to be to use linkage unit earlier, if produce the combination load circuit with linkage unit when the light emitting diode number of LED power source plate every road output load surpasses 37, if the light emitting diode number of every road output load then all disconnects linkage unit during smaller or equal to 37; Control each switch unit to adjust the actual loading ability of every load circuit (or combination load circuit) with control module again.
S12, the both ends of each load circuit (or combination load circuit) are linked to each other with each road output of LED power source plate respectively, all provide predetermined load thereby export for every road of LED power source plate.
S13, each road output of LED power source plate is opened simultaneously, the LED power source plate is carried out load testing.
S14, show test results by display unit.
Obviously, the power source loads method of testing of the various embodiments described above also can be carried out many variations.For example: the load capacity of the multichannel output of power supply can be inequality, then can adjust the load capacity of each load circuit different this moment; When being no more than the load capacity of single load circuit, also can use every road output loading capability linkage unit (for example to obtain specific load, LED power source plate to 4 light emitting diodes of every road output load, relay K 4 with the two after two load circuits 7 can being connected all disconnects, and other relay K 1, all conductings of K2, K3, thereby obtain the load of 4 series connection light emitting diodes).
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (10)
1. a load circuit comprises two ends, it is characterized in that,
The load unit that has at least two series connection between the both ends of described load circuit, described load unit are used to described load circuit that load is provided; Wherein have at least between the two ends of a load unit to be connected with switch unit, described switch unit is used for short circuit between the two ends of described load unit or opens circuit;
Or,
Have at least two load in parallel unit between the both ends of described load circuit, described load unit is used to described load circuit that load is provided; And have at least on the branch road at a load unit place to be in series with switch unit, described switch unit is used for the branch road conducting at described load unit place or opens circuit.
2. load circuit according to claim 1 is characterized in that, the load unit that has at least two series connection between the both ends of described load circuit is specially:
The LED load unit that has at least two series connection between the both ends of described load circuit comprises the light emitting diode of a light emitting diode or at least two series connection in each described LED load unit.
3. load circuit according to claim 2 is characterized in that, the LED load unit that has at least two series connection between the both ends of described load circuit is specially:
The LED load unit that has four series connection between the both ends of described load circuit, described four LED load unit are respectively: the LED load unit with light emitting diode of 20 series connection; LED load unit with light emitting diode of 10 series connection; LED load unit with light emitting diode of 5 series connection; LED load unit with light emitting diode of 2 series connection.
4. load circuit according to claim 1 is characterized in that, described load unit comprises at least a in capacitive load unit, ohmic load unit, the inductive load unit.
5. according to any described load circuit in the claim 1 to 4, it is characterized in that described switch unit is switch or relay.
6. a load testing device is characterized in that, comprises that at least one is as any described load circuit in the above-mentioned claim 1 to 5.
7. load testing device according to claim 6 is characterized in that, described load testing device comprises that at least one is specially as any described load circuit in the above-mentioned claim 1 to 5:
Described load testing device comprises at least two as any described load circuit in the above-mentioned claim 1 to 5;
And described load testing device also comprises:
Linkage unit is used for a end with a described load circuit and is connected with an end of another described load circuit or disconnects.
8. load testing device according to claim 6 is characterized in that, also comprises:
Control module is used for controlling the switch unit of described load circuit.
9. load testing device according to claim 8 is characterized in that, described load testing device comprises that at least one is specially as any described load circuit in the above-mentioned claim 1 to 5:
Load testing device comprise at least two structures identical, as any described load circuit in the above-mentioned claim 1 to 5;
And described control module is used for synchronously controlling the switch unit that is in same position of at least two described load circuits.
10. according to any described load testing device in the claim 6 to 9, it is characterized in that, also comprise:
Access unit is used for the both ends of described load circuit are connected with the output terminal of power supply to be tested;
Display unit is used to show test results.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010280762 CN101968503A (en) | 2010-09-14 | 2010-09-14 | Load circuit and load testing device with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010280762 CN101968503A (en) | 2010-09-14 | 2010-09-14 | Load circuit and load testing device with same |
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| CN101968503A true CN101968503A (en) | 2011-02-09 |
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| CN 201010280762 Pending CN101968503A (en) | 2010-09-14 | 2010-09-14 | Load circuit and load testing device with same |
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| WO2012000378A1 (en) * | 2010-06-30 | 2012-01-05 | 中兴通讯股份有限公司 | Method and apparatus for generating test circuit and power source testing system |
| CN102692594A (en) * | 2011-03-21 | 2012-09-26 | 海洋王照明科技股份有限公司 | Tool and method for testing constant current of LED drive board |
| CN102798831A (en) * | 2011-05-26 | 2012-11-28 | 鸿富锦精密工业（深圳）有限公司 | Circuit load device |
| CN104007397A (en) * | 2014-06-06 | 2014-08-27 | 浪潮电子信息产业股份有限公司 | Extensible simple power source aging test instrument based on basic resistor circuit |
| CN107294396A (en) * | 2016-04-01 | 2017-10-24 | 盐城市广庆电器有限公司 | Series resonance converter plant |
| CN110850845A (en) * | 2019-11-13 | 2020-02-28 | 上海航天控制技术研究所 | Space station solar wing simulated load test system |
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| CN101626645A (en) * | 2009-08-07 | 2010-01-13 | 上海小糸车灯有限公司 | Simulated load of automobile LED signal lamp |
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| CN104007397A (en) * | 2014-06-06 | 2014-08-27 | 浪潮电子信息产业股份有限公司 | Extensible simple power source aging test instrument based on basic resistor circuit |
| CN107294396A (en) * | 2016-04-01 | 2017-10-24 | 盐城市广庆电器有限公司 | Series resonance converter plant |
| CN110850845A (en) * | 2019-11-13 | 2020-02-28 | 上海航天控制技术研究所 | Space station solar wing simulated load test system |
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Application publication date: 20110209 |