CN103178513A - Current equalizing circuit of remote direct-current power supply - Google Patents
Current equalizing circuit of remote direct-current power supply Download PDFInfo
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- CN103178513A CN103178513A CN 201310066581 CN201310066581A CN103178513A CN 103178513 A CN103178513 A CN 103178513A CN 201310066581 CN201310066581 CN 201310066581 CN 201310066581 A CN201310066581 A CN 201310066581A CN 103178513 A CN103178513 A CN 103178513A
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Abstract
The invention provides a current equalizing circuit of a remote direct-current power supply. Via double control of software and hardware, a sampling error of current is eliminated; via revising optimization of software, current equalizing precision among modules is improved, and output voltage of a system is stabilized. The technical scheme includes that a CPU (central processing unit) control end is added, via comparison amplifying of equalized current calculated by a CPU and sampled current, and via the double control of the software and the hardware, the sampling error of the current is eliminated, the current equalizing precision among the modules is improved, and the output voltage of the system is stabilized. Compared with the prior art, the current equalizing circuit of the remote direct-current power supply has the advantages that higher current equalizing precision is realized, the output voltage of the system is stabilized, stability of the system is enhanced, and service life of the system is prolonged.
Description
Technical field
The present invention relates to the direct-current remote feeding power technical field, particularly relate to a kind of flow equalizing circuit.
Background technology
Direct-current remote feeding power is more and more extensive as a kind of application that solves the supply power mode that mobile base station, EPON and indoor and outdoor machine room build, direct-current remote feeding power is comprised of local side and far-end two parts, its local side is delivered to far-end with electric energy stable in machine room by composite cable, twisted pair wire or electric power cable, and the communication equipment that connects electric inconvenience or power supply instability for the locality provides stable, reliable, economic power supply supply.Communication equipment and transmission range, required the local supply of remote power feeding system partly need to provide larger power stage, usually up to several kilowatts, consider Systems balanth, also require power supply that backup output need to be arranged, so the local side of remote power feeding system partly is modular, be that a plurality of local side module combinations become CMTS, power stage is provided jointly, and CMTS can steady in a long-term move, and the equal mobility of local side intermodule is an important indicator.
Existing flow equalizing circuit current-sharing precision is not high, and the output voltage fluctuation range of system is large, does not reach requirement, has affected Systems balanth and useful life.
Summary of the invention
The invention provides a kind of flow equalizing circuit of direct-current remote feeding power, by the dual control of software and hardware, eliminated the sampling error of electric current, by the correction optimization of software, thereby improved the current-sharing precision of intermodule, stablized the output voltage of system.
The technical solution adopted in the present invention is: increase the CPU control end, utilize average current and the sample rate current that CPU calculates to compare and enlarge, by the dual control of software and hardware, eliminated the sampling error of electric current, thereby improved the current-sharing precision of intermodule, stablized the output voltage of system.
Compared with prior art, the invention has the beneficial effects as follows the higher current-sharing precision of realization, the output voltage of systems stabilisation strengthens Systems balanth and useful life.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of a part of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is flow equalizing circuit schematic diagram provided by the invention;
Fig. 2 is current sample figure;
Fig. 3 is the current signal enlarged drawing;
Fig. 4 is that current ratio is than output map;
Fig. 5 is that CPU controls output map.
Embodiment
In order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearer, clear, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 is flow equalizing circuit schematic diagram provided by the invention.
Fig. 2 is current sample figure; Fig. 2 is the output current sampling of module, and sampling resistor is R19, and the sampled signal that obtains is IS1.
Fig. 3 is the current signal enlarged drawing;
Fig. 4 is that current ratio is than output map; U3 in Fig. 4 is TL431, and the left-half circuit obtains a reference voltage V R1, and current sampling signal IS1 is input to the input of the same name of comparison amplifier U1B, is amplified signal VE after relatively amplifying.Fig. 4 is the current signal after amplifying and the comparison circuit of average current, I is the average current (herein for having passed through CPU amplified signal in proportion) of module, both distinguish Same Name of Ends and the different name end of input comparison amplifier, the output of comparison amplifier is controlled VF, VF is input to the control chip in Fig. 2, thereby the output voltage of control module is realized the current-sharing output of intermodule.
Fig. 5 is that CPU controls output map.CPU control end signal shown in Figure 5 is by CPU received current sampled signal, directly and the result that compares of average current, thereby control VF, VF remains the control chip that is input in Fig. 1, comes the output voltage of control module, thereby realizes current-sharing, the current signal of this mode is not through amplifying, through amplifying, precision is not higher for error, and the current-sharing precision of realization is also higher, system's output voltage is more stable, has improved Systems balanth and useful life.
Above-mentioned explanation illustrates and has described a preferred embodiment of the present invention, but as previously mentioned, be to be understood that the present invention is not limited to the disclosed form of this paper, should not regard the eliminating to other embodiment as, and can be used for various other combinations, modification and environment, and can in invention contemplated scope described herein, change by technology or the knowledge of above-mentioned instruction or association area.And the change that those skilled in the art carry out and variation do not break away from the spirit and scope of the present invention, all should be in the protection range of the appended claim of the present invention.
Claims (2)
1. the flow equalizing circuit of a direct-current remote feeding power, is characterized in that: also comprise the CPU control end; Specifically comprise, at first calculate average current (with obtaining divided by power module quantity after the sample rate current addition) signal I after by CPU, sample rate current being superposeed equal, all (amplify in proportion rear with comparator) I and feed back to comparison amplifier, through after obtain a feedback signal and be input to control chip and CPU, CPU also can export control signal to control chip, the signal of CPU output is auxiliary corrected signal, by continuous adjustment, thereby improve the current-sharing precision of intermodule, realize the current-sharing output of intermodule.
2. flow equalizing circuit according to claim 1, it is characterized in that: sample rate current and average current compare and enlarge, and by the dual control of software and hardware, have eliminated the sampling error of electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310066581 CN103178513A (en) | 2013-02-28 | 2013-02-28 | Current equalizing circuit of remote direct-current power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310066581 CN103178513A (en) | 2013-02-28 | 2013-02-28 | Current equalizing circuit of remote direct-current power supply |
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| Publication Number | Publication Date |
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| CN103178513A true CN103178513A (en) | 2013-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201310066581 Pending CN103178513A (en) | 2013-02-28 | 2013-02-28 | Current equalizing circuit of remote direct-current power supply |
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| CN (1) | CN103178513A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105990999A (en) * | 2015-01-27 | 2016-10-05 | 台达电子工业股份有限公司 | Power supply device and control method thereof |
| CN107526421A (en) * | 2017-08-18 | 2017-12-29 | 郑州云海信息技术有限公司 | A kind of double crimping power cable electric power systems |
| CN108306353A (en) * | 2017-12-14 | 2018-07-20 | 安徽工程大学 | A kind of digital current-sharing system and method for improvement type multiple module paralleling |
-
2013
- 2013-02-28 CN CN 201310066581 patent/CN103178513A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105990999A (en) * | 2015-01-27 | 2016-10-05 | 台达电子工业股份有限公司 | Power supply device and control method thereof |
| US9608518B2 (en) | 2015-01-27 | 2017-03-28 | Delta Electronics, Inc. | Power supply device and control method thereof |
| CN107526421A (en) * | 2017-08-18 | 2017-12-29 | 郑州云海信息技术有限公司 | A kind of double crimping power cable electric power systems |
| CN107526421B (en) * | 2017-08-18 | 2020-06-16 | 苏州浪潮智能科技有限公司 | Double-voltage power supply cable power supply system |
| CN108306353A (en) * | 2017-12-14 | 2018-07-20 | 安徽工程大学 | A kind of digital current-sharing system and method for improvement type multiple module paralleling |
| CN108306353B (en) * | 2017-12-14 | 2024-03-08 | 安徽工程大学 | Improved multi-module parallel digital current sharing system and method |
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Application publication date: 20130626 |