CN202374038U - Dual-power automatic switching circuit - Google Patents
Dual-power automatic switching circuit Download PDFInfo
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- CN202374038U CN202374038U CN2011205580039U CN201120558003U CN202374038U CN 202374038 U CN202374038 U CN 202374038U CN 2011205580039 U CN2011205580039 U CN 2011205580039U CN 201120558003 U CN201120558003 U CN 201120558003U CN 202374038 U CN202374038 U CN 202374038U
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- power supply
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- positive pole
- load
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Abstract
The utility model relates to the technical field of a direct current power supply circuit, in particular to a dual-power automatic switching circuit. The dual-power automatic switching circuit comprises a direct current power supply, a reserve power supply and a load, and further comprises a voltage detecting unit for detecting the output voltage of the direct current power supply, a control switch unit used for controlling whether the reserve power supply is communicated, and a diode D5. According to the utility model, when the direct current power supply has faults, the direct current power supply is automatically switched to be powered up by the reserve power supply; and the circuit is scientific and simple in structure, lower in cost and high in reliability.
Description
Technical field
The utility model relates to the DC power-supply circuit technical field, relates in particular to a kind of double supply automatic switch-over circuit.
Background technology
Compare traditional illuminations such as incandescent lamp, the LED lighting device has following advantage: higher luminous efficiency, and longer working life, high reliability, luminous mass is good etc.Along with the LED continuous advancement in technology, LED in the application of lighting field more and more widely, as LED matrix being applied to technical fields such as street lamp and mine illumination; Because the particularity of street lighting and mine illumination; We often need its lighting device can non-stop run, and promptly after civil power broke down, lighting device still can work on a period of time; Interrupt bringing unexpected injury to avoid throwing light on to the user suddenly; Therefore should be equipped with stand-by power supply, when civil power breaks down, power supply switched to stand-by power supply through commutation circuit.
LED matrix is through direct current supply, and existing DC power supply commutation circuit mainly is to control through microprocessor, and complicated circuit, cost are higher.
Summary of the invention
The purpose of the utility model is exactly to the deficiency of prior art existence a kind of double supply automatic switch-over circuit to be provided, and this double supply automatic switch-over circuit can be according to power supply electric power thus supplied auto switching electric source, and circuit is simple, and cost is lower.
To achieve these goals; The technical scheme that the utility model adopts is: a kind of double supply automatic switch-over circuit; Comprise DC power supply, stand-by power supply, load, further comprise the voltage detection unit that detects the DC power supply output voltage, control switch unit, the diode D5 whether the control stand-by power supply is communicated with;
Said voltage detection unit is provided with comparator U1; The positive terminal of comparator U1 is connected with the discharge of stand-by power supply is anodal through resistance R 9; The positive terminal of comparator U1 is connected with the negative pole of Zener diode D6, and the end of oppisite phase of comparator U1 is connected with the positive pole of DC power supply;
Said control switch unit is provided with triode Q1, and the base stage of triode Q1 is connected with the output of comparator U1, and the collector electrode of triode Q1 is connected with the discharge of stand-by power supply is anodal, and the emitter of triode Q1 is connected with the positive pole of load;
The positive pole of diode D5 is connected with the positive pole of DC power supply, and the negative pole of diode D5 is connected with the positive pole of load;
The minus earth of the positive pole of the negative pole of DC power supply, Zener diode D6, the negative pole of stand-by power supply, load.
Further be provided with the warning indicating member, said warning indicating member comprises light-emitting diode D7, resistance R 9, and the positive pole of light-emitting diode D7 is connected with the output of comparator U1, and the negative pole of light-emitting diode D7 is through resistance R 9 ground connection.
Said stand-by power supply is provided with charging electrode, and this charging electrode is connected with the positive pole of DC power supply.
The positive source of said comparator U1 is connected the power cathode ground connection of said comparator U1 with the discharge of stand-by power supply is anodal.
Be connected with capacitor C 6 between the positive pole of said DC power supply and the negative pole.
Said load is a LED matrix.
The utility model beneficial effect is: the utility model comprises double supply automatic switch-over circuit; Comprise DC power supply, stand-by power supply, load, further comprise the voltage detection unit that detects the DC power supply output voltage, control switch unit, the diode D5 whether the control stand-by power supply is communicated with, the utility model can be when DC power supply breaks down; Automatically switch to supply power by stand-by power supply; This circuit science is simple, and cost is lower, and reliability is high.
Description of drawings
Fig. 1 is the block diagram of the double supply automatic switch-over circuit of the utility model.
Fig. 2 is the circuit diagram of the double supply automatic switch-over circuit of the utility model.
In Fig. 1, Fig. 2, include:
1---DC power supply 2---stand-by power supply
3---load 4---voltage detection unit
5---control switch unit 6---warning indicating member.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
embodiment one.
A kind of double supply automatic switch-over circuit of present embodiment; Like Fig. 1, shown in Figure 2; It comprises DC power supply 1, stand-by power supply 2, load 3; The DC power supply 1 of present embodiment provides power supply for AC power after being converted into direct current; Stand-by power supply 2 is a battery, and load 3 is for using galvanic electrical equipment, and the double supply automatic switch-over circuit of the utility model further comprises the voltage detection unit 4 that detects DC power supply 1 output voltage, control switch unit 5, the diode D5 whether control stand-by power supply 2 is communicated with.Said voltage detection unit 4 is provided with comparator U1; Because of the voltage of stand-by power supply 2 relatively stable; Comparator U1 is through doing comparison with the output voltage of DC power supply 1 and the output voltage of stand-by power supply 2; When the output voltage of DC power supply 1 is lower than certain value, can judge that DC power supply 1 breaks down, load 3 changes into by stand-by power supply 2 electric energy is provided.The positive terminal of comparator U1 is connected with the discharge of stand-by power supply 2 is anodal through resistance R 9, and the positive terminal of comparator U1 is connected with the negative pole of Zener diode D6, and the end of oppisite phase of comparator U1 is connected with the positive pole of DC power supply 1.Said control switch unit 5 is provided with triode Q1, and the base stage of triode Q1 is connected with the output of comparator U1, and the collector electrode of triode Q1 is connected with the discharge of stand-by power supply 2 is anodal, and the emitter of triode Q1 is connected with the positive pole of load 3; The positive pole of diode D5 is connected with the positive pole of DC power supply 1, and the negative pole of diode D5 is connected with the positive pole of load 3; The minus earth of the negative pole of the positive pole of the negative pole of DC power supply 1, Zener diode D6, stand-by power supply 2, load 3.
The operation principle of the utility model is following:
A, when DC power supply 1 normal power supply, the current potential of comparator U1 end of oppisite phase is higher than the current potential of positive terminal, comparator U1 output low level, control switch Q1 turn-offs, stand-by power supply 2 is to load 3 power supplies, DC power supply 1 through diode D5 to load 3 power supplies.
B, when DC power supply 1 breaks down can't supply power the time, the current potential of comparator U1 end of oppisite phase is lower than the current potential of positive terminal, comparator U1 exports high level, triode Q1 conducting, 2 pairs of loads of stand-by power supply, 3 power supplies.
C, when DC power supply 1 recovers normal power supply, of above-mentioned A, DC power supply 1 recovers normal power supplies to load 3 automatically, stand-by power supply 2 is stopped power supply.
In sum, the double supply automatic switch-over circuit of present embodiment can be according to power supply electric power thus supplied auto switching electric source, and circuit is simple, and cost is lower.
For present embodiment, further, the double supply automatic switch-over circuit of present embodiment is provided with warning indicating member 6; Said warning indicating member 6 comprises light-emitting diode D7, resistance R 9, and the positive pole of light-emitting diode D7 is connected with the output of comparator U1, and the negative pole of light-emitting diode D7 is through resistance R 9 ground connection; When DC power supply 1 is not supplied power to load 3; And during by stand-by power supply 2 power supply, light-emitting diode D7 is luminous, and prompting user load 3 is in the stand-by power supply mode of operation.
Further, said stand-by power supply 2 is a rechargeable battery, and it is provided with charging electrode, and this charging electrode is connected with the positive pole of DC power supply 1, and when DC power supply 1 normal power supply, DC power supply 1 can charge to stand-by power supply 2 through charging electrode.
Further, the positive source of said comparator U1 is connected the power cathode ground connection of said comparator U1 with the discharge of stand-by power supply 2 is anodal.
Further, be connected with capacitor C 6 between the positive pole of said DC power supply 1 and the negative pole.
embodiment two.
Present embodiment is identical with embodiment one; Its difference is that said load 3 is LED matrix; Through double supply automatic switch-over circuit LED matrix is supplied power, when DC power supply 1 breaks down, can automatically switch to supplying power by stand-by power supply 2; LED matrix still can work on a period of time, interrupts suddenly bringing unexpected injury to the user to avoid throwing light on.The other technologies characteristic is identical with embodiment one, repeats no more at this.
Should be noted that at last; Above embodiment is only in order to explain the technical scheme of the utility model; But not to the restriction of the utility model protection range, although with reference to preferred embodiment the utility model has been done explanation at length, those of ordinary skill in the art is to be understood that; Can make amendment or be equal to replacement the technical scheme of the utility model, and not break away from the essence and the scope of the utility model technical scheme.
Claims (6)
1. double supply automatic switch-over circuit; It comprises DC power supply (1), stand-by power supply (2), load (3), it is characterized in that: further comprise the voltage detection unit (4) that detects DC power supply (1) output voltage, control switch unit (5), the diode D5 whether control stand-by power supply (2) is communicated with;
Said voltage detection unit (4) is provided with comparator U1; The positive terminal of comparator U1 is connected with the discharge of stand-by power supply (2) is anodal through resistance R 9; The positive terminal of comparator U1 is connected with the negative pole of Zener diode D6, and the end of oppisite phase of comparator U1 is connected with the positive pole of DC power supply (1);
Said control switch unit (5) is provided with triode Q1, and the base stage of triode Q1 is connected with the output of comparator U1, and the collector electrode of triode Q1 is connected with the discharge of stand-by power supply (2) is anodal, and the emitter of triode Q1 is connected with the positive pole of load (3);
The positive pole of diode D5 is connected with the positive pole of DC power supply (1), and the negative pole of diode D5 is connected with the positive pole of load (3);
The negative pole of the negative pole of DC power supply (1), the positive pole of Zener diode D6, stand-by power supply (2), the minus earth of load (3).
2. double supply automatic switch-over circuit according to claim 1; It is characterized in that: further be provided with warning indicating member (6); Said warning indicating member (6) comprises light-emitting diode D7, resistance R 9; The positive pole of light-emitting diode D7 is connected with the output of comparator U1, and the negative pole of light-emitting diode D7 is through resistance R 9 ground connection.
3. double supply automatic switch-over circuit according to claim 1 is characterized in that: said stand-by power supply (2) is provided with charging electrode, and this charging electrode is connected with the positive pole of DC power supply (1).
4. double supply automatic switch-over circuit according to claim 1 is characterized in that: the positive source of said comparator U1 is connected the power cathode ground connection of said comparator U1 with the discharge of stand-by power supply (2) is anodal.
5. double supply automatic switch-over circuit according to claim 1 is characterized in that: be connected with capacitor C 6 between the positive pole of said DC power supply (1) and the negative pole.
6. double supply automatic switch-over circuit according to claim 1 is characterized in that: said load (3) is a LED matrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205580039U CN202374038U (en) | 2011-12-28 | 2011-12-28 | Dual-power automatic switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205580039U CN202374038U (en) | 2011-12-28 | 2011-12-28 | Dual-power automatic switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202374038U true CN202374038U (en) | 2012-08-08 |
Family
ID=46597729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205580039U Expired - Fee Related CN202374038U (en) | 2011-12-28 | 2011-12-28 | Dual-power automatic switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202374038U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218669A (en) * | 2014-09-28 | 2014-12-17 | 南车株洲电力机车有限公司 | Charger module, charging system and charging method corresponding to charger module |
| CN104218665A (en) * | 2013-05-31 | 2014-12-17 | 英业达科技有限公司 | A power supply apparatus and a method for switching the same |
| CN105990900A (en) * | 2015-01-30 | 2016-10-05 | 明瑞电子(成都)有限公司 | Redundancy power control circuit and redundancy power supplying system using same |
| CN108258904A (en) * | 2017-12-01 | 2018-07-06 | 珠海格力电器股份有限公司 | DC power supply and its method of supplying power to |
| CN109633480A (en) * | 2018-12-03 | 2019-04-16 | 天津津航计算技术研究所 | Power module detecting tool and method |
-
2011
- 2011-12-28 CN CN2011205580039U patent/CN202374038U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218665A (en) * | 2013-05-31 | 2014-12-17 | 英业达科技有限公司 | A power supply apparatus and a method for switching the same |
| CN104218669A (en) * | 2014-09-28 | 2014-12-17 | 南车株洲电力机车有限公司 | Charger module, charging system and charging method corresponding to charger module |
| CN104218669B (en) * | 2014-09-28 | 2016-07-27 | 南车株洲电力机车有限公司 | A kind of charging method of charger module, charging system and correspondence thereof |
| CN105990900A (en) * | 2015-01-30 | 2016-10-05 | 明瑞电子(成都)有限公司 | Redundancy power control circuit and redundancy power supplying system using same |
| CN105990900B (en) * | 2015-01-30 | 2018-08-17 | 明瑞电子(成都)有限公司 | Stand-by power supply control circuit and use its stand-by power supply supply system |
| CN108258904A (en) * | 2017-12-01 | 2018-07-06 | 珠海格力电器股份有限公司 | DC power supply and its method of supplying power to |
| CN109633480A (en) * | 2018-12-03 | 2019-04-16 | 天津津航计算技术研究所 | Power module detecting tool and method |
| CN109633480B (en) * | 2018-12-03 | 2021-01-26 | 天津津航计算技术研究所 | Power module detection tool and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20171228 |