CN206727724U - Active and standby dc source with defencive function - Google Patents
Active and standby dc source with defencive function Download PDFInfo
- Publication number
- CN206727724U CN206727724U CN201720636195.8U CN201720636195U CN206727724U CN 206727724 U CN206727724 U CN 206727724U CN 201720636195 U CN201720636195 U CN 201720636195U CN 206727724 U CN206727724 U CN 206727724U
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- Prior art keywords
- source
- standby
- transistor
- diode
- resistance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Emergency Protection Circuit Devices (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
The utility model discloses a kind of active and standby dc source with defencive function, including the switching circuit and power supply protection circuit being connected with main DC source and standby DC source；The power supply protection circuit includes：Concatenate switching circuit inductance L1 and diode D2；The transistor Q4 of drain electrode connection diode D2 anodes, the transistor Q4 source ground, grid concatenation driving resistance R5；The resistance R2 of diode D1 negative electrodes, grid connection resistance R2 transistor Q2 are connected, transistor Q2 drain electrode is all connected with main DC source, the negative output terminal of standby DC source, source ground；Emitter stage connects the triode Q3 of transistor Q2 grids, triode Q3 grounded collector, base stage concatenation driving resistance R6, and drives resistance R6 with driving resistance R5 common port to be connected short-circuit detecting circuit.The utility model can detect occur it is short-circuit when effective protection power source, have it is simple in construction, cost of implementation is relatively low and stable and reliable in work the advantages of.
Description
Technical field
Power supply is the utility model is related to, more particularly, to a kind of active and standby dc source with defencive function.
Background technology
Dc source is widely used in various electronic equipments, most widely used with the dc source of lithium battery.It is existing straight
Following defect be present in stream power supply：
1. typically do not have main power supply, it is impossible to meet the actual use need that high electronic equipment is required job stability
Will.
2. in order to prevent short circuit, power current fuse is concatenated in the output end of dc source.When a short circuit occurs, fuse
Melt and disconnect, but this short-circuit protection circuit needs frequently to change fuse, and circuit maintenance cost is higher, and troublesome in poeration.
Utility model content
The defects of to overcome prior art, the utility model proposes a kind of circuit structure is simple, reliability is high and with protection
The active and standby dc source of function.
The utility model discloses a kind of active and standby dc source with defencive function, and it includes：A kind of master with defencive function
Standby dc source, including main DC source in parallel and standby DC source, the switching that is connected with main DC source and standby DC source are electric
Road and power supply protection circuit；The power supply protection circuit includes：It is serially connected in the inductance L1 and diode D2 of switching circuit positive output end；
The transistor Q4 of drain electrode connection diode D2 anodes, the transistor Q4 source ground, grid concatenation driving resistance R5；Connection two
The resistance R2 of pole pipe D1 negative electrodes, grid connection resistance R2 transistor Q2, transistor Q2 drain electrode are all connected with main DC source
The negative output terminal of negative output terminal and standby DC source, source ground；Emitter stage connects the triode Q3 of transistor Q2 grids, and this three
Pole pipe Q3 grounded collector, base stage concatenation driving resistance R6, and drive resistance R6 to be concatenated with driving resistance R5, and drive resistance
R6 is with driving resistance R5 common port to be connected short-circuit detecting circuit.
Wherein, the power supply protection circuit also includes the diode D4 between connection switching circuit positive output end and ground, and this two
Pole pipe D4 plus earth.
Wherein, the short-circuit detecting circuit includes：It is serially connected in taking between the negative output terminal V- of the active and standby dc source and ground
Sample resistance R3, anode connection sampling resistor R3 diode D3, the diode D3 negative electrode connection comparator U2 input, and
Common ports of the comparator U2 output end connection driving resistance R6 with driving resistance R5.
Wherein, the switching circuit includes：Grid connects the transistor Q1 of main DC source positive output end, transistor Q1 leakage
The positive output end of the standby DC source of pole connection, transistor Q1 grid series diode D1 connection source electrodes, diode D1's
Anode is grounded by resistance R1, diode D1 negative electrode connection switching circuit positive output end.
Compared with prior art, the utility model has the advantages that：
The utility model proposes active and standby dc source, main DC source and standby DC source can realize that seamless switching exports,
Improve the reliability of power supply；The active and standby dc source also has power supply protection circuit, can be effective when detecting that generation is short-circuit
Protection power source, there is the advantages of simple in construction, cost of implementation is relatively low and stable and reliable in work, various topologys can be widely used in
The power circuit of structure.
Brief description of the drawings
Fig. 1 is the modular construction schematic diagram of active and standby dc source.
Fig. 2 is the circuit diagram of the utility model one embodiment.
Embodiment
As shown in figure 1, the utility model proposes active and standby dc source include main DC source 1 in parallel and standby DC source
2nd, the switching circuit 3 and power supply protection circuit 4 being connected with main DC source 1 and standby DC source 2.Will by the selectivity of switching circuit 3
Main DC source 1 or standby DC source 2 are used as power supply source, and seamless switching is realized between main DC source 1 and standby DC source 2.And
Power supply protection circuit 4 provides power supply output and short-circuit protection.
With reference to shown in Fig. 2.The switching output that switching circuit is used to realize between main DC source 1 and standby DC source 2, this is cut
Changing circuit includes：Grid connects the transistor Q1 of the main positive output end of DC source 1, and transistor Q1 drain electrode connects standby DC source
2 positive output end, transistor Q1 grid series diode D1 connection source electrodes, and diode D1 anode passes through resistance R1
Ground connection.When main DC source 1 is powered, diode D1 conductings and transistor Q1 cut-offs, the positive output end output electricity of main DC source 1
Stream；Conversely, when the main electricity of DC source 1 is inadequate or disconnects, diode D1 cut-offs and transistor Q1 conductings, standby DC source 2
Positive output end passes through transistor Q1 output currents.As can be seen here, can be in main DC source 1 and standby DC source 2 by switching circuit
Between seamless switching.
Power supply protection circuit 4 includes：It is serially connected in the inductance L1 and diode D2 of diode D1 negative electrodes, diode D2 the moon
The positive output end V+ of extremely active and standby dc source；The transistor Q4 of drain electrode connection diode D2 anodes, transistor Q4 source electrode
Ground connection, grid concatenation driving resistance R5；The diode D4 between diode D1 negative electrodes and ground is connected, diode D4 anode connects
Ground；The resistance R2 of diode D1 negative electrodes, grid connection resistance R2 transistor Q2 are connected, transistor Q2 drain electrode is all connected with leading
The negative output terminal of the negative output terminal of DC source 1 and standby DC source 2, source ground；The three of emitter stage connection transistor Q2 grids
Pole pipe Q3, the triode Q3 grounded collector, base stage concatenation driving resistance R6, and drive resistance R6 to be gone here and there with driving resistance R5
Connect, and drive resistance R6 with driving resistance R5 common port to be connected short-circuit detecting circuit.
The short-circuit detecting circuit includes：The sample resistance being serially connected between the negative output terminal V- of the active and standby dc source and ground
R3, anode connection sampling resistor R3 diode D3, the diode D3 negative electrode connection comparator U2 input, and comparator
Common ports of the U2 output end connection driving resistance R6 with driving resistance R5.
During normal work, transistor Q2 grid for high level therefore turns on, and the electric current that diode D1 is exported is passed through inductance
L1, diode D2 are exported, and now comparator U2 output ends are low level therefore triode Q3 and transistor Q4 is turned off.When active and standby straight
When occurring short-circuit between the positive output end V+ and negative output terminal V- of stream power supply, sampling resistor R3 both end voltage moment rise, lead to
Cross comparator U2 output ends and high level is changed into from low level, so as to which triode Q3 and transistor Q4 is both turned on, pulldown transistors Q2
Grid its current potential is changed into zero potential, moment, which disconnects transistor Q2, makes the positive-negative output end of main DC source 1 or standby DC source 2
Between do not re-form closed-loop path, so as to play the function of protection；Also, the energy in inductance L1 passes through transistor Q4, two poles
Pipe D4 forms discharge loop, avoids instantaneous short circuit protection and causes inductance L1 not have discharge loop generation electric arc to cause to power supply electricity
The damage on road.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (4)
- A kind of 1. active and standby dc source with defencive function, it is characterised in that main DC source and standby DC source including parallel connection, The switching circuit and power supply protection circuit being connected with main DC source and standby DC source；The power supply protection circuit includes：It is serially connected in The inductance L1 and diode D2 of switching circuit positive output end；The transistor Q4, transistor Q4 of drain electrode connection diode D2 anodes Source ground, grid concatenation driving resistance R5；Connect the resistance R2 of diode D1 negative electrodes, grid connection resistance R2 transistor Q2, the transistor Q2 drain electrode are all connected with the negative output terminal of main DC source and negative output terminal, the source ground of standby DC source；Hair Emitter-base bandgap grading connects the triode Q3 of transistor Q2 grids, triode Q3 grounded collector, base stage concatenation driving resistance R6, and drives Dynamic resistance R6 concatenates with driving resistance R5, and drives resistance R6 with driving resistance R5 common port to be connected short-circuit detecting circuit.
- 2. the active and standby dc source with defencive function according to claim 1, it is characterised in that the power supply protection circuit also wraps Include the diode D4 between connection switching circuit positive output end and ground, diode D4 plus earth.
- 3. the active and standby dc source with defencive function according to claim 1, it is characterised in that the short-circuit detecting circuit bag Include：The sample resistance R3 being serially connected between the negative output terminal V- of the active and standby dc source and ground, anode connection sampling resistor R3's Diode D3, the diode D3 negative electrode connection comparator U2 input, and comparator U2 output end connection driving resistance R6 and driving resistance R5 common port.
- 4. according to the active and standby dc source with defencive function of claim 1 or 2 or 3, it is characterised in that the switching circuit bag Include：Grid connects the transistor Q1 of main DC source positive output end, and transistor Q1 drain electrode connects the positive output of standby DC source End, transistor Q1 grid series diode D1 connection source electrodes, diode D1 anode are grounded by resistance R1, two pole Pipe D1 negative electrode connection switching circuit positive output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720636195.8U CN206727724U (en) | 2017-06-03 | 2017-06-03 | Active and standby dc source with defencive function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720636195.8U CN206727724U (en) | 2017-06-03 | 2017-06-03 | Active and standby dc source with defencive function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206727724U true CN206727724U (en) | 2017-12-08 |
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ID=60511456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720636195.8U Expired - Fee Related CN206727724U (en) | 2017-06-03 | 2017-06-03 | Active and standby dc source with defencive function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206727724U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347085A (en) * | 2018-12-06 | 2019-02-15 | 福建宏宇电子科技有限公司 | A kind of circuit carrying out one-to-many communication using DC power system |
| CN109687567A (en) * | 2019-01-25 | 2019-04-26 | 中国船舶重工集团公司第七0九研究所 | A kind of novel redundancy electric power supply system |
-
2017
- 2017-06-03 CN CN201720636195.8U patent/CN206727724U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347085A (en) * | 2018-12-06 | 2019-02-15 | 福建宏宇电子科技有限公司 | A kind of circuit carrying out one-to-many communication using DC power system |
| CN109687567A (en) * | 2019-01-25 | 2019-04-26 | 中国船舶重工集团公司第七0九研究所 | A kind of novel redundancy electric power supply system |
| CN109687567B (en) * | 2019-01-25 | 2022-08-16 | 中国船舶重工集团公司第七0九研究所 | Novel redundant power supply system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171208 Termination date: 20180603 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |