CN207475278U - A kind of two-supply circuit - Google Patents
A kind of two-supply circuit Download PDFInfo
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- CN207475278U CN207475278U CN201721443409.6U CN201721443409U CN207475278U CN 207475278 U CN207475278 U CN 207475278U CN 201721443409 U CN201721443409 U CN 201721443409U CN 207475278 U CN207475278 U CN 207475278U
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- triode
- resistance
- power supply
- circuit
- voltage detecting
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Abstract
The utility model discloses a kind of two-supply circuits, and including the first power supply, second source, power port, voltage detecting circuit and control switching circuit, the first power supply and second source switch alternately connection power port by relay K1；Control switching circuit includes connected triode Q1, Q2, and the both ends of voltage detecting circuit connect the first power supply and triode Q1 respectively, and the output of voltage detecting circuit obtains electric and dead electricity by triode Q1 and Q2 control relay K1 coils.First power supply and second source, which separate and pass through relay K1, to be switched, and voltage detecting circuit and control switching circuit are only electrically connected the first power supply, and the isolation independence between the first power supply and second source is preferable；Voltage detecting circuit is directly connected to simple control switching circuit, and the two-supply circuit is more simple and reliable.
Description
Technical field
The utility model is related to a kind of power circuit, more particularly, to a kind of two-supply circuit.
Background technology
In electric system, supplied in order to which the reliable and stable operation of the equipment in guarantee system is equipped with two sets of power supplys to equipment
Electricity, after abnormity of power supply disconnects all the way, another way power supply continues power supply to the device, ensures equipment stable operation.
There are mainly three types of existing two-supply circuits, and one kind is two-way large power supply module, in this kind setting, circuit body
Product is big, of high cost；After a kind of use two-way power supply converges, then main circuit is given to power, in this kind setting, the isolation of two sets of power supplys is only
Vertical property is poor, and since problem with grounding is susceptible between two power supplys play a reversed role electric current, leakage current；Another kind, voltage detecting circuit
And microprocessor chips, the circuit such as introducing microcontroller seem complex between control switching circuit, increase circuit cost.
Utility model content
In order to overcome the deficiencies of the prior art, the purpose of this utility model is to provide a kind of two-supply circuits, solve double electricity
The problem of source circuit isolation independence is poor, circuit is more complicated.
The utility model for solve its technical problem the technical solution adopted is that：
A kind of two-supply circuit, including the first power supply, second source, power port, voltage detecting circuit and switching control
Circuit, the first power supply and second source switch alternately connection power port by relay K1；The control switching circuit includes
Connected triode Q1, Q2, the both ends of voltage detecting circuit connect the first power supply and triode Q1 respectively, voltage detecting circuit
Output obtains electric and dead electricity by triode Q1 and Q2 control relay K1 coils.
Preferably, the relay K1 is set as one, and the first power supply and second source pass through the normal of relay K1 respectively
Open contact and normally-closed contact connection power port.
Preferably, the base stage of the output terminal connecting triode Q1 of the voltage detecting circuit, the collector of triode Q1 connect
Connect the base stage of triode Q2.
Preferably, the voltage detecting circuit includes connected division module and optocoupler detection module, optocoupler detection module
Output terminal connecting triode Q1.
Preferably, the division module includes the resistance R1 of series connection and resistance R2, the series circuit of resistance R1, R2 are serially connected in
The both ends of first power supply；Optocoupler detection module is in parallel with resistance R2.
Preferably, the resistance R1 and resistance R2 is adjustable resistance.
Preferably, the emitter of the optocoupler detection module also passes through resistance R3 connection ground terminals.
Preferably, the collector of the optocoupler detection module is connected with capacitance C1 with transmitting interpolar.
Preferably, the resistance R3 is parallel with capacitance C2.
Preferably, power conversion module is further included, the input terminal of power conversion module connects the first power supply, power supply modulus of conversion
The output terminal connection voltage detecting circuit and control switching circuit of block.
A kind of two-supply circuit that the utility model uses, has the advantages that：First power supply and second source point
Open and pass through relay K1 and switch, voltage detecting circuit and control switching circuit are only electrically connected the first power supply, the first power supply and
Isolation independence between second source is preferable；Voltage detecting circuit is directly connected to simple control switching circuit, dual power supply electricity
Road is more simple and reliable.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model.
Specific embodiment
Below in conjunction with attached drawing and example, the utility model is described in further detail.
As shown in Figure 1, a kind of two-supply circuit of the utility model, including the first power supply 1, second source 2, power port
3rd, voltage detecting circuit and control switching circuit, the first power supply 1 and second source 2 switch alternately connection power supply by relay K1
Port 3；The control switching circuit includes connected triode Q1, Q2, and the both ends of voltage detecting circuit connect the first electricity respectively
Source 1 and triode Q1, the output of voltage detecting circuit obtain electric and dead electricity by triode Q1 and Q2 control relay K1 coils.
For voltage detecting circuit for detecting the voltage value of the first power supply 1, the testing result of voltage detecting circuit passes through switching
Control circuit control relay K1's obtains electric and dead electricity, and the first power supply 1 of replacement of electric drive second source 2 that obtains of relay K1 connects
Power port 3.Specifically, voltage detecting circuit is additionally operable to the conducting of control triode Q1, triode Q1 is used to control triode
The conducting of Q2, triode Q2 are used to control relay K1's to obtain electric and dead electricity.When the voltage of the first power supply 1 is met the requirements, electricity
Press detection circuit driving triode Q1 conductings.
Preferably, the relay K1 could be provided as：Relay K1 is set as two, the first power supply 1 and second source 2
Power port 3 is connected by the normally-closed contact of the normally opened contact of the first relay K1 and the second relay K1 respectively.
The relay K1 may be set to be：Relay K1 is set as one, and the first power supply 1 and second source 2 are distinguished
Power port 3 is connected by the normally opened contact and normally-closed contact of relay K1.
Preferably, the base stage of the output terminal connecting triode Q1 of the voltage detecting circuit, the collector of triode Q1 connect
Connect the base stage of triode Q2.The output level control triode Q1 collectors of voltage detecting circuit and its conducting of emitter；Three
The level control triode Q2 collectors of the collector of pole pipe Q1 and its conducting of emitter.Further have, triode Q1, Q2
For NPN type, the triode Q1 emitters connect ground terminal, and triode Q2 is grounded by relay K1 coils；Control switching circuit
In, the output terminal of voltage detecting circuit controls the conducting of triode Q1 by high level.The triode Q1 emitters pass through electricity
Hinder R4 connection ground terminals.
Preferably, the voltage detecting circuit includes connected division module and optocoupler detection module, optocoupler detection module
Output terminal connecting triode Q1.The voltage of the first power supply 1, the output terminal of optocoupler detection module are detected by optocoupler detection module
Control the conducting of triode Q1.Further have, the triode Q1 is NPN type, and the emitter of optocoupler detection module connects three
Pole pipe Q1, when the emitter of optocoupler detection module exports high level, triode Q1 conductings.
Preferably, the division module includes the resistance R1 of series connection and resistance R2, the series circuit of resistance R1, R2 are serially connected in
The both ends of first power supply 1；Optocoupler detection module is in parallel with resistance R2.By resistance R1 and resistance R2 electricity is distributed to the first power supply 1
Pressure, the voltage at optocoupler detection module detection resistance R2 both ends；And then optocoupler detection module controls relay by triode Q1 and Q2
Device K1 coils obtain electric and dead electricity.Resistance R1 and resistance R2 has certain partial pressure ratio, by dividing ratio and optocoupler detection module
Monitoring lower-cut value, the low voltage value of 1 module of the first power supply is calculated.
Preferably, the resistance R1 and resistance R2 is adjustable resistance.Resistance R1 is set according to the detection low level of the first power supply 1
And the ratio of resistance R2.Further have, the resistance R1 and resistance R2 are slide rheostat.
Preferably, the emitter of optocoupler detection module also passes through resistance R3 connection ground terminals.The resistance R3 is as drop-down electricity
Resistance, triode Q1 are NPN type and emitter ground terminal；When the triode of optocoupler detection module is not turned on, the base of triode Q1
Extremely low level and triode Q1 is not turned on.
Preferably, the collector of optocoupler detection module is connected with capacitance C1 with transmitting interpolar.Capacitance C1, filtering circuit are set
Exchange clutter, pincers determine the voltage at the triode both ends of optocoupler detection module.
Preferably, resistance R3 is parallel with capacitance C2；Capacitance C2 is set, the exchange clutter in circuit is preferably connected into ground,
Exchange clutter is avoided to cause malfunction.
Preferably, power conversion module 4 is further included, the input terminal of power conversion module 4 connects the first power supply 1, and power supply turns
Change the mold the output terminal connection voltage detecting circuit and control switching circuit of block 4.Further have, the output of power conversion module 4
End includes GND ends and VCC ends, the collector of VCC ends connection optocoupler detection module, the collector of triode Q2, and VCC gives light in end
Coupling detection module and triode Q2 provide power supply.
The above is not the limitation to the utility model, and the utility model is also not limited to the above embodiment,
As long as the variations, modifications, additions or substitutions made in the essential scope of the utility model, so as to reach the utility model
Technique effect should all belong to the scope of protection of the utility model.
Claims (10)
1. a kind of two-supply circuit, it is characterised in that：Including the first power supply (1), second source (2), power port (3), voltage
Detection circuit and control switching circuit, the first power supply (1) and second source (2) switch alternately connection power end by relay K1
Mouth (3)；The control switching circuit includes connected triode Q1, Q2, and the both ends of voltage detecting circuit connect the first electricity respectively
Source (1) and triode Q1, the output of voltage detecting circuit obtain electric and mistake by triode Q1 and Q2 control relay K1 coils
Electricity.
2. a kind of two-supply circuit according to claim 1, it is characterised in that：The relay K1 is set as one, and
One power supply (1) and second source (2) connect power port (3) by the normally opened contact and normally-closed contact of relay K1 respectively.
3. a kind of two-supply circuit according to claim 1, it is characterised in that：The output terminal of the voltage detecting circuit connects
Connect the base stage of triode Q1, the base stage of the collector connecting triode Q2 of triode Q1.
4. according to a kind of any two-supply circuit of claim 1 and 3, it is characterised in that：The voltage detecting circuit packet
Include connected division module and optocoupler detection module, the output terminal connecting triode Q1 of optocoupler detection module.
5. a kind of two-supply circuit according to claim 4, it is characterised in that：The division module includes the resistance of series connection
R1 and resistance R2, the series circuit of resistance R1, R2 are serially connected in the both ends of the first power supply (1)；Optocoupler detection module and resistance R2 are simultaneously
Connection.
6. a kind of two-supply circuit according to claim 5, it is characterised in that：The resistance R1 and resistance R2 is adjustable electric
Resistance.
7. a kind of two-supply circuit according to claim 4, it is characterised in that：The emitter of the optocoupler detection module is also
Pass through resistance R3 connection ground terminals.
8. a kind of two-supply circuit according to claim 4, it is characterised in that：The collector of the optocoupler detection module with
Transmitting interpolar is connected with capacitance C1.
9. a kind of two-supply circuit according to claim 7, it is characterised in that：The resistance R3 is parallel with capacitance C2.
10. a kind of two-supply circuit according to claim 1, it is characterised in that：Power conversion module (4) is further included, electricity
The input terminal of source modular converter (4) connects the first power supply (1), the output terminal connection voltage detecting circuit of power conversion module (4)
And control switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721443409.6U CN207475278U (en) | 2017-11-01 | 2017-11-01 | A kind of two-supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721443409.6U CN207475278U (en) | 2017-11-01 | 2017-11-01 | A kind of two-supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207475278U true CN207475278U (en) | 2018-06-08 |
Family
ID=62262119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721443409.6U Active CN207475278U (en) | 2017-11-01 | 2017-11-01 | A kind of two-supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207475278U (en) |
-
2017
- 2017-11-01 CN CN201721443409.6U patent/CN207475278U/en active Active
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