CN102315638A - Filtering control unit of communication direct-current power supply system - Google Patents
Filtering control unit of communication direct-current power supply system Download PDFInfo
- Publication number
- CN102315638A CN102315638A CN201110087928A CN201110087928A CN102315638A CN 102315638 A CN102315638 A CN 102315638A CN 201110087928 A CN201110087928 A CN 201110087928A CN 201110087928 A CN201110087928 A CN 201110087928A CN 102315638 A CN102315638 A CN 102315638A
- Authority
- CN
- China
- Prior art keywords
- circuit
- input
- voltage
- control circuit
- filter capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention provides a filtering control unit of a communication direct-current power supply system. The filtering control unit comprises an auxiliary power supply circuit, a filtering capacitor and an electronic switch, wherein the input end of the filtering capacitor and the input end of the auxiliary power supply circuit are connected to a 0V voltage end, the output end of the auxiliary power supply circuit is connected with the input end of a singlechip microcomputer control circuit, the output end of the singlechip microcomputer control circuit is connected with the input end of a charging control circuit, the output end of the charging control circuit is connected with the input end of the filtering capacitor, and a discharge control circuit is connected between the output end of the filtering capacitor and the output end of the singlechip microcomputer control circuit; the filtering capacitor is also connected with the electronic switch, and the electronic switch is connected to a -48V voltage end through an input antireversion protection circuit; and the output end of the singlechip microcomputer control circuit is also connected with the electronic switch respectively through an input overvoltage-undervoltage protection circuit and an input port short-circuit protection circuit. According to the invention, the ripple current of a supplied direct-current power bus is reduced.
Description
Technical field
The present invention relates to a kind of filtering control unit of communication DC electric power system.
Background technology
Most at present power supply system for communicationss adopts interchange to change direct current or DC-DC obtains a DC bus-bar voltage; The direct supply communication server and communication equipment that DC bus-bar voltage has, powerful system then need add some power distributing unit again and link to each other with communication equipment.Be to adopt power line to be connected between dc power supply and the power distributing unit, and the power line that this section is connected is to have certain inductance of length equivalence, communication equipment is in operate as normal; Electric current is to present a dynamic current; And frequency also changes, and the electric current that this inductance can be followed variation produces vibration, makes that the input DC bus-bar voltage of power distributing unit is unstable; Cause the communication device works of back undesired, thereby influence the operate as normal of whole system.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of filtering control unit of communication DC electric power system is provided, reduce the ripple current of dc power supply bus.
The object of the invention is realized through following technical scheme:
The filtering control unit of communication DC electric power system; It is characterized in that: comprise auxiliary power circuit, filter capacitor and electronic switch; The input of said filter capacitor and auxiliary power circuit is connected to the 0V voltage end; The output of said auxiliary power circuit links to each other with the input of single chip machine controlling circuit; The output of single chip machine controlling circuit links to each other with the input of charging control circuit, and the output of charging control circuit links to each other with the input of filter capacitor, is connected with charge/discharge control circuit between the output of said filter capacitor and the output of single chip machine controlling circuit; Said filter capacitor also links to each other with electronic switch, and electronic switch is connected to-the 48V voltage end through input counnter attack protective circuit; The output of single chip machine controlling circuit also links to each other with electronic switch with the input port short-circuit protection circuit through the input over under-voltage protection circuit respectively.
The substantive distinguishing features of technical scheme of the present invention is mainly reflected in progressive:
The present invention can realize reducing the ripple current of dc power supply bus, when the circuit operate as normal, has charging control circuit in the circuit, and wherein filter capacitor can improve busbar voltage stability, ensures communication base station and electric power equipment operate as normal effectively.
Description of drawings
Below in conjunction with accompanying drawing technical scheme of the present invention is described further:
Fig. 1: block architecture diagram of the present invention.
The implication of each Reference numeral among the figure: 1-auxiliary power circuit; The 2-single chip machine controlling circuit; The 3-charging control circuit; The 4-filter capacitor; The 5-electronic switch; The 6-charge/discharge control circuit; 7-input counnter attack protective circuit; 8-imports over under-voltage protection circuit; 9-input port short-circuit protection circuit.
Embodiment
The filtering control unit of communication DC electric power system; As shown in Figure 1; Comprise auxiliary power circuit 1, filter capacitor 4 and electronic switch 5; The input of filter capacitor 4 and auxiliary power circuit 1 is connected to the 0V voltage end, and the output of auxiliary power circuit 1 links to each other with the input of single chip machine controlling circuit 2, and the output of single chip machine controlling circuit 2 links to each other with the input of charging control circuit 3; The output of charging control circuit 3 links to each other with the input of filter capacitor 4, is connected with charge/discharge control circuit 6 between the output of the output of filter capacitor 4 and single chip machine controlling circuit 2; Filter capacitor 4 also links to each other with electronic switch 5, and electronic switch 5 is connected to-the 48V voltage end through input counnter attack protective circuit 7; The output of single chip machine controlling circuit 2 also links to each other with electronic switch 5 with input port short-circuit protection circuit 9 through input over under-voltage protection circuit 8 respectively.
During concrete the application; When the voltage on the input rises to the voltage that can start auxiliary power circuit 1; Auxiliary power circuit 1 is started working, and auxiliary power circuit 1 adopts linear voltage-stabilizing circuit to realize, auxiliary power circuit 1 connects metal-oxide-semiconductor; Auxiliary power circuit 1 directly obtains 12V, 5V and the 2.5V of needs from the last step-down of input 48V through metal-oxide-semiconductor; 12V is used for opening metal-oxide-semiconductor and gives charging control circuit 3 power supplies, and 5V supplies with single chip machine controlling circuit 2, and 2.5V is the reference voltage of supplying with in the input port short-circuit protection circuit 9; Single chip machine controlling circuit 2 electric controlled, when input voltage during in the normal working voltage scope, single chip machine controlling circuit 2 will be controlled charging control circuit 3 and start working; Charging control circuit 3 is by shunt resistance of string on the metal-oxide-semiconductor; Limit the gate voltage of metal-oxide-semiconductor through the voltage that detects shunt resistance, make metal-oxide-semiconductor can realize current limliting, then filter capacitor 4 is charged; When the voltage of filter capacitor 4 rises near input voltage; But the voltage on the filter capacitor 4 is during also less than input terminal voltage 1 ~ 2V, and single chip machine controlling circuit 2 control electronic switches 5 are opened, and this moment, filter capacitor 4 was connected in parallel on the input port fully; The voltage of filter capacitor 4 equates with the voltage of input is approaching; When load was 0～45A/100Hz/210mA/us square wave, filter capacitor 4 work were charged repeatedly and are discharged, and the output ripple electric current of power supply will diminish.
Wherein, Charge/discharge control circuit 6 is that the cement resistor through two 10R/9W of parallel connection comes to filter capacitor 4 discharge; The electric current that filter capacitor 4 is emitted is cascaded cement resistor and metal-oxide-semiconductor about 10A, discharges through the work of control metal-oxide-semiconductor; When input voltage is turned off; The time that need to set postpones more than 5 seconds discharges again, can guarantee that like this resistance can not burnt out in the switching on and shutting down continuously, prevents to import to guarantee that inside fills the electric energy of filter capacitor 4 and in time released behind the power supply power-fail.
Input over under-voltage protection circuit 8 adopts a difference amplifier to detect input voltage, and voltage signal is delivered to single chip machine controlling circuit 2, controls whole unit work through single chip machine controlling circuit 2.When input voltage is crossed low or break off; Be that single chip machine controlling circuit 2 detects input port voltage less than input during under-voltage protection point; Single chip machine controlling circuit 2 control electronic switches 5 will be disconnected, and input port voltage continues to drop to when being lower than certain voltage simultaneously, and single chip machine controlling circuit 2 is opened the metal-oxide-semiconductor that is in series with discharge resistance with control lag and discharged after a period of time; When the voltage on filter capacitor 4 drops to and is lower than certain voltage; Charge/discharge control circuit 6 quits work, and plays a protective role, and improves its reliability.
Input port short-circuit protection circuit 9 is to realize this function with filter capacitor string shunt resistance together; When input port was short-circuited state, filter capacitor 4 can be by discharge immediately, and discharging current can rise rapidly; When reaching the short circuit current protection of setting; The reference voltage that voltage on the shunt resistance can surpass be set, the comparator output level that can overturn immediately removes to turn-off electronic switch 5 and locked, stops filter capacitor 4 back discharges; When the time that short circuit continues surpasses the time of the power down time-delay that single chip machine controlling circuit 2 sets, filter capacitor 4 will be discharged protective circuit by discharge resistance.
Input counnter attack protective circuit 7 is to utilize two back-to-back metal-oxide-semiconductors to realize; When input voltage is connect inverse time at port, the diode of following metal-oxide-semiconductor body has stoped that voltage is counter irritates, and does not have current direction inside; Thereby guarantee that all devices can not be damaged, its purpose also is in order to improve reliability.
Above-mentioned protective circuit can better protective circuit be moved work normally; Improved reliability of products; And reduce the ripple current of dc power supply bus, when the circuit operate as normal, in circuit, have charging control circuit after; Filter capacitor wherein can improve busbar voltage stability, has effectively played guarantee communication base station and electric power equipment operate as normal.
It is emphasized that: above only is preferred embodiment of the present invention; Be not that the present invention is done any pro forma restriction; Every foundation technical spirit of the present invention all still belongs in the scope of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (1)
1. the filtering control unit of communication DC electric power system; It is characterized in that: comprise auxiliary power circuit, filter capacitor and electronic switch; The input of said filter capacitor and auxiliary power circuit is connected to the 0V voltage end; The output of said auxiliary power circuit links to each other with the input of single chip machine controlling circuit; The output of single chip machine controlling circuit links to each other with the input of charging control circuit, and the output of charging control circuit links to each other with the input of filter capacitor, is connected with charge/discharge control circuit between the output of said filter capacitor and the output of single chip machine controlling circuit; Said filter capacitor also links to each other with electronic switch, and electronic switch is connected to-the 48V voltage end through input counnter attack protective circuit; The output of single chip machine controlling circuit also links to each other with electronic switch with the input port short-circuit protection circuit through the input over under-voltage protection circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110087928A CN102315638A (en) | 2011-04-08 | 2011-04-08 | Filtering control unit of communication direct-current power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110087928A CN102315638A (en) | 2011-04-08 | 2011-04-08 | Filtering control unit of communication direct-current power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102315638A true CN102315638A (en) | 2012-01-11 |
Family
ID=45428540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110087928A Pending CN102315638A (en) | 2011-04-08 | 2011-04-08 | Filtering control unit of communication direct-current power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102315638A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457344A (en) * | 2012-05-28 | 2013-12-18 | 比亚迪股份有限公司 | High voltage capacitor charge discharge system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200947546Y (en) * | 2006-06-06 | 2007-09-12 | 粟时平 | Low-voltage three-phase static reactive synchronous compensator |
| US7616465B1 (en) * | 2004-02-24 | 2009-11-10 | Vlt, Inc. | Energy storage and hold-up method and apparatus for high density power conversion |
| CN101635470A (en) * | 2009-08-19 | 2010-01-27 | 王广生 | Quick charger of power-saving storage battery and intelligent charging method |
| CN101741133A (en) * | 2009-12-29 | 2010-06-16 | 哈尔滨工业大学 | Optical network hybrid power supply uniterruptable power supply having function of correcting power factor on network side |
| CN201584784U (en) * | 2009-12-28 | 2010-09-15 | 苏州工业园区和顺电气股份有限公司 | Active power filter with energy storage function |
| CN201893556U (en) * | 2011-04-08 | 2011-07-06 | 安伏（苏州）电子有限公司 | Filter control unit of communication direct-current (DC) power supply system |
-
2011
- 2011-04-08 CN CN201110087928A patent/CN102315638A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7616465B1 (en) * | 2004-02-24 | 2009-11-10 | Vlt, Inc. | Energy storage and hold-up method and apparatus for high density power conversion |
| CN200947546Y (en) * | 2006-06-06 | 2007-09-12 | 粟时平 | Low-voltage three-phase static reactive synchronous compensator |
| CN101635470A (en) * | 2009-08-19 | 2010-01-27 | 王广生 | Quick charger of power-saving storage battery and intelligent charging method |
| CN201584784U (en) * | 2009-12-28 | 2010-09-15 | 苏州工业园区和顺电气股份有限公司 | Active power filter with energy storage function |
| CN101741133A (en) * | 2009-12-29 | 2010-06-16 | 哈尔滨工业大学 | Optical network hybrid power supply uniterruptable power supply having function of correcting power factor on network side |
| CN201893556U (en) * | 2011-04-08 | 2011-07-06 | 安伏（苏州）电子有限公司 | Filter control unit of communication direct-current (DC) power supply system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457344A (en) * | 2012-05-28 | 2013-12-18 | 比亚迪股份有限公司 | High voltage capacitor charge discharge system |
| CN103457344B (en) * | 2012-05-28 | 2015-11-25 | 比亚迪股份有限公司 | A kind of high voltage capacitor charge discharge system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102427262B (en) | Elevator braking energy feedback and control system based on super capacitor | |
| CN101882806B (en) | Storage battery charging and discharging device | |
| JP2021184698A5 (en) | ||
| US9979227B2 (en) | Line interactive UPS | |
| WO2008040225A1 (en) | Electric vehicle charging system | |
| CN201266840Y (en) | DC power supply manager, power supply translation circuit and battery bag | |
| CN105514939A (en) | Charging and discharging control device and control method for energy storage super-capacitor of electric workover rig | |
| CN104748288B (en) | Soft start charging circuit and its control method | |
| CN212725408U (en) | Battery management circuit and power supply circuit | |
| CN108215918A (en) | A kind of new-energy automobile high-pressure system circuit | |
| CN102497009A (en) | Bus soft start circuit of uninterrupted power supply, and method for the same | |
| CN203984377U (en) | One is with soft start and turn-off switching circuit fast | |
| US11303133B2 (en) | Photovoltaic inverter and method for operating a photovoltaic inverter | |
| CN103715762A (en) | Bidirectional switching circuit of hybrid power supply system and control method of bidirectional switching circuit | |
| CN102882204A (en) | Voltage control device of direct-current bus and working method thereof as well as voltage control system | |
| CN201893556U (en) | Filter control unit of communication direct-current (DC) power supply system | |
| CN104410318A (en) | Inversion and rectification integrated power conversion circuit | |
| CN102315638A (en) | Filtering control unit of communication direct-current power supply system | |
| CN203671834U (en) | Soft start charging circuit | |
| CN205489578U (en) | Prevent anti - discharge circuit of irritating of battery voltage | |
| CN114179643B (en) | Bidirectional charging pile | |
| CN114006426A (en) | Large capacitive load pre-charging circuit and working method thereof | |
| CN205092770U (en) | Power management circuit that steps up | |
| US20210376648A1 (en) | Output protector for charger | |
| CN210640722U (en) | Battery switch circuit and power supply management system comprising same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120111 |