CN202150025U - Intelligent dummy load automatic switching control system - Google Patents
Intelligent dummy load automatic switching control system Download PDFInfo
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- CN202150025U CN202150025U CN 201120079429 CN201120079429U CN202150025U CN 202150025 U CN202150025 U CN 202150025U CN 201120079429 CN201120079429 CN 201120079429 CN 201120079429 U CN201120079429 U CN 201120079429U CN 202150025 U CN202150025 U CN 202150025U
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Abstract
The utility model provides an intelligent dummy load automatic switching control system including a signal collecting circuit, a filtering circuit, an amplifying circuit, a comparison circuit, a switching tube and a dummy load. An output terminal of the signal collecting circuit connects with the filtering circuit. The filtering circuit connects with the amplifying circuit. The amplifying circuit connects with the comparison circuit. The comparison circuit connects with a drive circuit of the switching tube. A collector of the switching tube connects with one end of the dummy load and the other end of the dummy load connects with an output positive terminal of a power source. The amplifying circuit and the comparison circuit can be replaced with a comparison and transmittal circuit. By using the intelligent dummy load automatic switching control system in the utility model, problems of oscillation when the power source is in no load and serious duty ratio loss when the power source is in a load below a certain light load capacity are solved. The running reliability of the power source, the complete power source service lifetime and the service lifetimes of devices, instruments and meters using the power source are guaranteed; a problem of large complete power source loss caused by the direct participation of the dummy load when the power source is in a load from the certain light load capacity to a full load capacity of an arbitrarily load is solved; and the complete power source working efficiency of the power source in the load from the certain light load capacity to a full load capacity of an arbitrarily load is improved effectively.
Description
Technical field
The utility model belongs to the field of power supplies of equipment, Device and Meters, relates in particular to a kind of intelligent fictitious load automatic switching control system that is applied to high power switching power supply, linear stabilized power supply and other electric power main circuit system.
Background technology
Progress along with society; The application of high power switching power supply, linear stabilized power supply and other power supply more and more widely; And the part of one of them core is exactly the Power Conversion unit in the main circuit, and the quality of Power Conversion unit performance directly affects stability, reliability, the work efficiency of whole power supply and uses the equipment of this power supply, the serviceable life of Device and Meters.At present, no matter adopt which kind of topological circuit, all can add certain fictitious load for stability and the reliability that improves power supply mostly at high power switching power supply, linear stabilized power supply and other power conversion unit.In the practical application; For stability and the reliability that improves whole power supply; Prevent the serious phenomenon of the unloaded vibration of power supply, underloading duty-cycle loss then usually can with fictitious load add very big; Exist that the power supply machine loss is big, full load efficiency is on the low side, can not satisfy the design conditions of efficient power, can not meet consumers' demand; If meet consumers' demand; Improve power supply full load overall efficiency then usually can with fictitious load add very little; Exist the unloaded vibration of power supply, the serious phenomenon of underloading duty-cycle loss; Directly cause the power supply loop that loop oscillation causes when zero load unstable; Duty-cycle loss and using the equipment of this power supply, the serviceable life of Device and Meters during underloading, have a strong impact on the power supply operation reliability, machine life and use the equipment of this power supply, the serviceable life of Device and Meters, can both operate as normal in the gamut thereby whole Switching Power Supply, linear stabilized power supply and other power supply can't be guaranteed.
In sum, in the prior art, high power switching power supply, linear stabilized power supply and other electric power main circuit system can add certain fictitious load mostly.The power supply machine loss is big, output full load efficiency phenomenon on the low side if fictitious load then exists when enough big; If fictitious load then existed the unloaded vibration of power supply, the serious phenomenon of underloading duty-cycle loss in enough hour; Have a strong impact on power supply reliability of operation, machine life and use the equipment of this power supply, the serviceable life of Device and Meters, can both operate as normal in the power supply gamut thereby can't guarantee.
Summary of the invention
The purpose of the utility model is to be directed against the defective that the existing power supply system exists aspect fictitious load; A kind of intelligent fictitious load automatic switching control system is provided; Can not only solve the unloaded vibration of power supply, the serious problem of underloading duty-cycle loss that the power supply fictitious load caused in enough hour, and can also solve well the power supply machine loss that fictitious load causes when enough big big, export the full load efficiency problem of lower.
First kind of technical scheme of the utility model is following: the utility model comprises signal acquisition circuit, filtering circuit, amplifying circuit, comparator circuit, switching tube and fictitious load; The output of said signal acquisition circuit connects filtering circuit; Filtering circuit connects amplifying circuit, and amplifying circuit connects comparator circuit, and the output of comparator circuit connects the base drive circuit of switching tube; The collector of switching tube connects an end of fictitious load, the output plus terminal of another termination power of fictitious load.
As preferred version; Said switching tube adopts switch triode, and the output of said comparator circuit connects the base drive circuit of switch triode, and the collector of said switch triode connects an end of fictitious load; The output plus terminal of another termination power of fictitious load, the grounded emitter of switch triode.
Second kind of technical scheme of the utility model is following: the utility model comprises signal acquisition circuit, filtering circuit, comparison discharge circuit, two switching tubes and fictitious load; The output of said signal acquisition circuit connects filtering circuit; Filtering circuit connects the comparison discharge circuit; Relatively the output of discharge circuit meets switching tube Q1, Q2 successively, and the collector of switching tube Q2 connects an end of fictitious load, the output plus terminal of another termination power of fictitious load.
As preferred version; Said two switching tubes adopt switch triode Q1 and switch triode Q2; The output of said relatively discharge circuit connects the base drive circuit of switch triode Q1, and the collector of switch triode Q1 connects the base stage of switch triode Q2, and the collector of switch triode Q2 connects an end of fictitious load and connects the base stage of switch triode Q1 through resistance R 9; The output plus terminal of another termination power of fictitious load, the grounded emitter of switch triode Q1 and Q2.
The technique effect of the utility model is: the utility model automatically operates in the fictitious load state with down to the unloaded any load of output the time in a certain underloading; The unloaded vibration of power supply, the serious phenomenon problem of underloading duty-cycle loss have been solved; Guarantee the power supply operation reliability, machine life and use the equipment of this power supply, the serviceable life of Device and Meters, can both operate as normal thereby make in the power supply gamut; The utility model is automatic cutout and break away from fictitious load during to the fully loaded any load of output more than a certain underloading; Solved and caused the big problem of power supply machine loss when fictitious load is participated in directly, improved more than a certain underloading of power supply to the complete machine work efficiency of exporting full load.
Description of drawings
Fig. 1 is the partial circuit schematic diagram that various topological structures adopt mostly in the prior art.
Fig. 2 is the schematic block circuit diagram of first kind of technical scheme of the utility model.
Fig. 3 is circuit block diagram and the part schematic diagram of embodiment one.
Fig. 4 is circuit block diagram and the part schematic diagram of embodiment two.
Fig. 5 is circuit block diagram and the part schematic diagram of embodiment three.
Embodiment
Fig. 1 is that various topological structure circuit adopt circuit theory diagrams mostly in the prior art.Be not difficult to find out that from this figure sort circuit to the beginning clearly learns to all participating in work eventually, when fictitious load is enough big, then exists the phenomenon that the power supply machine loss is big, full load efficiency is on the low side; If fictitious load then existed the unloaded vibration of power supply, the serious phenomenon of underloading duty-cycle loss in enough hour easily; Have a strong impact on power supply operation reliability, machine life and use the equipment of this power supply, the serviceable life of Device and Meters, can both operate as normal in the power supply gamut thereby can't guarantee.
Referring to Fig. 2 and Fig. 3, embodiment one is a kind of intelligent fictitious load automatic switching control system, comprises signal acquisition circuit, filtering circuit, amplifying circuit, comparator circuit, switching tube and fictitious load; Said signal acquisition circuit is electric current or power signal Acquisition Circuit; The output of signal acquisition circuit connects filtering circuit, and filtering circuit adopts the RC wave filter, and filtering circuit connects amplifying circuit; Amplifying circuit connects comparator circuit; The output of comparator circuit connects the base drive circuit of switching tube, and switching tube connects an end of fictitious load, the output plus terminal of another termination power of fictitious load.Switching tube adopts switch triode Q2 among the embodiment one; Connect the base stage of switch triode Q2 after the output resistance in series R5 of comparator circuit and the resistance R 7; The base stage of switch triode Q2 is ground connection after resistance R 6 simultaneously; The collector of switch triode Q2 connects fictitious load, grounded emitter, and fictitious load is composed in parallel by resistance R 10, resistance R 11, resistance R 12, resistance R 13, resistance R 14, resistance R 15.
The course of work of embodiment one is: electric current or power signal Acquisition Circuit can reflect the signal specific of power source loads weight after through the RC filter filtering; And export to comparator circuit after amplifying this signal through amplifying circuit and compare; The amplified signal value of the more said signal specific of comparator circuit and the size of preset value; When amplified signal value greater than preset value; Explain that power work is under the condition of underloading (a certain underloading is with unloaded any load down to output); Comparator circuit output high level is given the driving circuit of the switch triode Q2 of fictitious load, and switch triode Q2 conducting also inserts fictitious load automatically, has avoided power supply to exist the unloaded vibration of power supply, the serious phenomenon generation of underloading duty-cycle loss easily because of inserting enough little fictitious load; Guarantee the power supply operation reliability, machine life and use the equipment of this power supply, the serviceable life of Device and Meters, can both operate as normal thereby make in the power supply gamut; If amplified signal value is less than preset value; Explain that power work is under the condition of heavy duty (fully loaded any load to output more than a certain underloading); The comparator circuit output low level is given the driving circuit of the switch triode Q2 of fictitious load; Switch triode Q2 breaks off and breaks away from fictitious load automatically and breaks away from automatically; The big problem of machine loss of having avoided power supply to cause because of inserting participating in directly of enough big fictitious load effectively raises the above complete machine work efficiency during to the fully loaded any load of output of a certain underloading of power supply.
Referring to Fig. 2 and Fig. 4; The utility model embodiment two is slightly different with embodiment one: switching tube adopts switch triode Q1 and switch triode Q2 among the embodiment two; The output of comparator circuit connects the base drive circuit of switch triode Q1; Specifically be the base stage that meets switch triode Q1 after output resistance in series R5 and the resistance R 7 of comparator circuit, the base stage of switch triode Q1 is ground connection after resistance R 6 simultaneously, and the collector of switch triode Q1 connects the base stage of switch triode Q2; The collector of switch triode Q2 connects fictitious load, the grounded emitter of switch triode Q1 and switch triode Q2.
The course of work of embodiment two is: electric current or power signal Acquisition Circuit can reflect the signal specific of power source loads weight after through the RC filter filtering; And export to comparator circuit to this signal after through amplifying circuit and compare; The amplified signal value of the more said signal specific of comparator circuit and the size of preset value; When amplified signal value greater than preset value, explain that native system is operated under the condition of heavy duty, comparator circuit output high level is given the base drive circuit of switch triode Q1; Switch triode Q1 conducting; Switch triode Q2 by and break off fictitious load, the big problem of machine loss of having avoided power supply to cause because of inserting participating in directly of enough big fictitious load effectively raises the above work efficiency when heavily loaded of a certain underloading of power supply; When amplified signal value less than preset value; Explain that native system is operated under the condition of underloading; The comparator circuit output low level is given the base drive circuit of switch triode Q1; This moment, switch triode Q1 ended, and switch triode Q2 conducting also inserts fictitious load automatically, had avoided power supply to exist the unloaded vibration of power supply, the serious phenomenon generation of underloading duty-cycle loss easily because of inserting enough little fictitious load; Guarantee the power supply operation reliability, machine life and use the equipment of this power supply, the serviceable life of Device and Meters, can both operate as normal in the power supply gamut thereby make.
Fig. 3 and embodiment shown in Figure 4 be transformation applications mutually.Through contrast to Fig. 3, Fig. 4, be not difficult to find out that both control mode signals are different, control be an opposite signal, to give special heed to during application.Each other then only need during utilization the signal before the comparator circuit changed mutually or the signal behind the comparator circuit overturn get final product, concrete application process is just no longer elaboration here.
Embodiment three is the embodiment of second kind of technical scheme of the utility model.Referring to Fig. 5, signal acquisition circuit is gathered current signal (I among the embodiment three
S); Resistance R 3 composes in parallel the RC wave filter with capacitor C 2; Resistance R 1 is the build-out resistor of signal acquisition circuit, and resistance R 2, R4 and capacitor C 3 are formed the times magnification numerical value of amplifier U1A, and capacitor C 1 is the input filter capacitor of amplifier U1A; Resistance R 5, resistance R 7, resistance R 6 and resistance R 9 are formed divider resistance; Triode Q1, triode Q2 are switching tube (also can select metal-oxide-semiconductor for use), and resistance R 10, resistance R 11, resistance R 12, resistance R 13, resistance R 14 and resistance R 15 compose in parallel fictitious load, and resistance R 8 is the current-limiting resistance of triode Q1 collector.
The course of work of embodiment three is following:
Acquisition Circuit will collect current signal (IS) through comparing computing with the GND signal behind the RC filter filtering of being made up of resistance R 3 and capacitor C 2; Signal value after the computing carries out ratio according to the times magnification numerical value of being made up of amplifier U1A resistance R 2, R4 and capacitor C 3 and amplifies; Export to the driving circuit of switch triode Q1 when the signal value of amplifying signal value after carrying out dividing potential drop through resistance R 5, R7, R6 and R9; When if the magnitude of voltage after the amplified signal value process dividing potential drop on resistance R 6 reaches the base drive voltage of switch triode Q1; Explain that power work is under the condition of heavy duty (fully loaded any load to output more than a certain underloading); Then switch triode Q1 conducting, Q2 end and disconnection fictitious load R10, R11, R12, R13, R14 and R15; The big problem of machine loss of having avoided power supply to cause because of inserting participating in directly of enough big fictitious load effectively raises the above work efficiency during to the fully loaded any load of output of a certain underloading of power supply; If amplified signal value is through the magnitude of voltage on resistance R 6 after the dividing potential drop during less than the base drive voltage of switch triode Q1; Explain that power work is under the condition of underloading (a certain underloading is with unloaded any load down to output); Then switch triode Q1 is by, Q2 conducting and insert fictitious load R10, R11, R12, R13, R14 and R15 automatically; Avoided power supply to exist the unloaded vibration of power supply, the serious phenomenon generation of underloading duty-cycle loss easily because of inserting enough little fictitious load; Guarantee the power supply operation reliability, machine life and use the equipment of this power supply, the serviceable life of Device and Meters, can both operate as normal in the power supply gamut thereby make.
Claims (6)
1. intelligent fictitious load automatic switching control system; It is characterized in that: comprise signal acquisition circuit, filtering circuit, amplifying circuit, comparator circuit, switching tube and fictitious load, the output of said signal acquisition circuit connects filtering circuit, and filtering circuit connects amplifying circuit; Amplifying circuit connects comparator circuit; The output of comparator circuit connects the base drive circuit of switching tube, and the collector of switching tube connects an end of fictitious load, the output plus terminal of another termination power of fictitious load.
2. intelligent fictitious load automatic switching control system according to claim 1 is characterized in that: said signal acquisition circuit is electric current or power signal Acquisition Circuit.
3. intelligent fictitious load automatic switching control system according to claim 1 and 2; It is characterized in that: said switching tube adopts switch triode; The output of said comparator circuit connects the base drive circuit of switch triode; The collector of said switch triode connects an end of fictitious load, the output plus terminal of another termination power of fictitious load, the grounded emitter of switch triode.
4. intelligent fictitious load automatic switching control system according to claim 1 and 2 is characterized in that: said filtering circuit adopts the RC wave filter.
5. intelligent fictitious load automatic switching control system; It is characterized in that: comprise signal acquisition circuit, filtering circuit, comparison discharge circuit, two switching tubes and fictitious load; The output of said signal acquisition circuit connects filtering circuit, and filtering circuit connects the comparison discharge circuit, and relatively the output of discharge circuit meets switching tube Q1, Q2 successively; The collector of switching tube Q2 connects an end of fictitious load, the output plus terminal of another termination power of fictitious load.
6. intelligent fictitious load automatic switching control system according to claim 5; It is characterized in that: said two switching tubes adopt switch triode Q1 and switch triode Q2; The said relatively output of discharge circuit connects the base drive circuit of switch triode Q1; The collector of switch triode Q1 connects the base stage of switch triode Q2; The collector of switch triode Q2 connects an end of fictitious load and connects the base stage of switch triode Q1, the output plus terminal of another termination power of fictitious load, the grounded emitter of switch triode Q1 and Q2 through resistance R 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120079429 CN202150025U (en) | 2011-03-23 | 2011-03-23 | Intelligent dummy load automatic switching control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120079429 CN202150025U (en) | 2011-03-23 | 2011-03-23 | Intelligent dummy load automatic switching control system |
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| Publication Number | Publication Date |
|---|---|
| CN202150025U true CN202150025U (en) | 2012-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120079429 Expired - Fee Related CN202150025U (en) | 2011-03-23 | 2011-03-23 | Intelligent dummy load automatic switching control system |
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| Country | Link |
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| CN (1) | CN202150025U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036425A (en) * | 2012-12-14 | 2013-04-10 | 大连海事大学 | Direct current (DC)-DC convertor dead load |
| CN103901959A (en) * | 2012-12-27 | 2014-07-02 | 技嘉科技股份有限公司 | Mainboard and power management method thereof |
| CN104079187A (en) * | 2013-03-14 | 2014-10-01 | 全汉企业股份有限公司 | Power supply apparatus |
| CN105322799A (en) * | 2014-06-04 | 2016-02-10 | 通嘉科技股份有限公司 | Dummy Load Controllers and Control Methods |
-
2011
- 2011-03-23 CN CN 201120079429 patent/CN202150025U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036425A (en) * | 2012-12-14 | 2013-04-10 | 大连海事大学 | Direct current (DC)-DC convertor dead load |
| CN103036425B (en) * | 2012-12-14 | 2015-10-28 | 大连海事大学 | The dead load of a kind of DC-DC converter |
| CN103901959A (en) * | 2012-12-27 | 2014-07-02 | 技嘉科技股份有限公司 | Mainboard and power management method thereof |
| CN103901959B (en) * | 2012-12-27 | 2018-03-20 | 技嘉科技股份有限公司 | Mainboard and power management method thereof |
| CN104079187A (en) * | 2013-03-14 | 2014-10-01 | 全汉企业股份有限公司 | Power supply apparatus |
| CN105322799A (en) * | 2014-06-04 | 2016-02-10 | 通嘉科技股份有限公司 | Dummy Load Controllers and Control Methods |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN JINGFUYUAN TECH. CO., LTD. Free format text: FORMER NAME: SHENZHEN JINGFUYUAN TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Shenzhen Nanshan District City, Guangdong province 518000 white pine Luxili Nangang Second Industrial Park 12 Building 1, 2, 5 floor Patentee after: SHENZHEN JINGFUYUAN TECHNOLOGY CO., LTD. Address before: Shenzhen Nanshan District City, Guangdong province 518000 white pine Luxili Nangang Second Industrial Park twelfth 5 floor Patentee before: Shenzhen Jingfuyuan Tech Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120222 Termination date: 20190323 |
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| CF01 | Termination of patent right due to non-payment of annual fee |