CN206807131U - A kind of low pressure drop reverse-filling main power supply automatic switch-over circuit - Google Patents
A kind of low pressure drop reverse-filling main power supply automatic switch-over circuit Download PDFInfo
- Publication number
- CN206807131U CN206807131U CN201720639279.7U CN201720639279U CN206807131U CN 206807131 U CN206807131 U CN 206807131U CN 201720639279 U CN201720639279 U CN 201720639279U CN 206807131 U CN206807131 U CN 206807131U
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- CN
- China
- Prior art keywords
- power supply
- source
- pressure drop
- main power
- low pressure
- 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.)
- Expired - Fee Related
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Classifications
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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
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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
- 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
Abstract
The utility model discloses a kind of low pressure drop reverse-filling main power supply automatic switch-over circuit; including the first power supply and second source; and it is installed on two FETs between the first power supply and second source seat; connect a resistance protection FET respectively in the outside of two FETs; and increasing a diode prevents the first power supply to be connected with second source by resistance; the input of first power supply has a voltage-stabiliser tube, and two triodes are set between the first power supply and second source.The utility model solves the problems, such as the reverse-filling of existing main power supply switching mode, protects two-way power supply not influence each other；Meanwhile the problem of pressure drop of existing main power supply switching mode is reduced, reduce influence of the switching circuit to power-efficient.
Description
Technical field
It the utility model is related to the power supply switch circuit in unmanned plane field, and in particular to a kind of active and standby electricity of low pressure drop reverse-filling
Source automatic switch-over circuit.
Background technology
Electronic product now is increasingly partial to main power supply and use is switched under different occasions, such as with interior
The electronic product of portion's battery, can be with battery powered, can also externally fed.Therefore, the switching circuit of power supply is also more and more heavier
Will.Traditional switching circuit is included with three kinds in figure below：Single diode (Fig. 1), two diodes (Fig. 2), two field-effects
Manage (Fig. 3).But these three circuits can not be accomplished while non-interference between ensureing two kinds of power supplys, and not influence power supply
Efficiency.
A, carry out circuit switching with single diode, when main power supply pressure difference be more than diode drop and simultaneously in the presence of,
The situation that high-voltage power supply fills electricity toward LVPS is had, may result in power supply damage.In addition, there is pressure drop in diode
(0.3V or 0.7V), when electric current is bigger, diode heating is bigger, and power supply switch circuit reduces the efficiency of power supply.
B, circuit switching is carried out with two diodes, can solves the situation of pouring in down a chimney, but two-way power supply can be caused all to exist
Diode drop, similarly, electric current are bigger, and diode heating is bigger, and power supply switch circuit reduces the efficiency of power supply.
C, switched over two FETs, compared to the mode of first two diode, without the pressure drop of diode, still
When two-way power supply simultaneously in the presence of, have high-voltage power supply toward LVPS fill electricity situation, may result in power supply damage.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of the anti-down of existing main power supply switching mode of solution
Filling problem, two-way power supply is protected not influence each other；Meanwhile the problem of pressure drop of existing main power supply switching mode is reduced, reduction is cut
Change influence of the circuit to power-efficient.
The utility model is achieved through the following technical solutions：A kind of low pressure drop reverse-filling main power supply automatically switches
Circuit, including the first power supply and second source, and two field-effects being installed between the first power supply and second source seat
Pipe, connect a resistance protection FET respectively in the outside of two FETs, and increase a diode to prevent the first electricity
Source is connected with second source by resistance, and the input of the first power supply has a voltage-stabiliser tube, and in the first power supply and second
Two triodes are set between power supply.
As preferable technical scheme, first power supply is main power source, and second source is stand-by power supply.
As preferable technical scheme, the thresholding of voltage-stabiliser tube is slightly larger than second source.
As preferable technical scheme, transistor emitter ground connection, base stage connects the first power supply and second source respectively.
As preferable technical scheme, the voltage-stabiliser tube is Schottky diode.
The beneficial effects of the utility model are：The reverse-filling that the utility model solves existing main power supply switching mode is asked
Topic, protects two-way power supply not influence each other；Meanwhile the problem of pressure drop of existing main power supply switching mode is reduced, reduce switching electricity
Influence of the road to power-efficient.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the switching circuit figure of single diode in the prior art；
Fig. 2 is the switching circuit figure of two diodes in the prior art；
Fig. 3 is the switching circuit figure of two FETs in the prior art；
Fig. 4 is switching circuit figure of the present utility model；
Fig. 5 is the power supply switch circuit figure of embodiment 1；
Fig. 6 is the power supply switch circuit figure of embodiment 2
Embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine in any way.
Any feature disclosed in this specification (including any accessory claim, summary and accompanying drawing), except non-specifically chatting
State, can alternative features equivalent by other or with similar purpose replaced.I.e., unless specifically stated otherwise, each feature
It is an example in a series of equivalent or similar characteristics.
As shown in figure 4, including the first power supply and second source, and be installed between the first power supply and second source seat
Two FETs, connect a resistance protection FET respectively in the outside of two FETs, and increase by two poles
Pipe prevents the first power supply to be connected with second source by resistance, and the input of the first power supply has a voltage-stabiliser tube, and
Two triodes are set between one power supply and second source.
Wherein, the first power supply is main power source, and second source is stand-by power supply.Transistor emitter is grounded, and base stage connects respectively
Connect the first power supply and second source.Voltage-stabiliser tube is Schottky diode.
In Fig. 1, A is the first power supply, and B is second source, external by a-power supply when a-power supply is present and B-source is not present
Power supply；When a-power supply exist and B-source simultaneously in the presence of, a-power supply breakdown voltage-stabiliser tube, FET is ended by triode, B
Power supply is not turned on, or is powered by a-power supply；When a-power supply is not present but in the presence of B-source, voltage-stabiliser tube is not breakdown, and now field is imitated
Should pipe conducting, B externally discharged by A channel, and the thresholding of voltage-stabiliser tube is slightly larger than B-source, and now voltage-stabiliser tube is not still breakdown, B
Power supply supplying power for outside always.Also, increase resistance protection FET, increase diode prevents a-power supply from passing through resistance with B-source
It is connected.
Embodiment 1
In oblique photograph, there is three-way power：Unmanned electromechanical source, outside DC12V power supplys, internal backup battery power supply.
Under different occasions, each power supply needs mutually switching.As shown in figure 4, what is provided is 12V and the outside of the Power convert of unmanned plane
The switching of DC12V power supplys.
Embodiment 2
As shown in figure 5, what is provided is switchings of the 8V with internal backup battery power supply of outside DC12V Power converts.
The beneficial effects of the utility model are：The utility model uses two FETs, with unification voltage-stabiliser tube and two
Individual triode, the main secondary power switching circuit design of low pressure drop reverse-filling is realized, ensures that two-way power supply works not by shadow simultaneously
Ring, and reduce influence of the switching circuit to power-efficient.
It is described above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, any change or replacement expected without creative work, should all cover within the scope of protection of the utility model.
Therefore, the scope of protection of the utility model should be determined by the scope of protection defined in the claims.
Claims (5)
1. a kind of low pressure drop reverse-filling main power supply automatic switch-over circuit, including the first power supply and second source, and installation
Two FETs between the first power supply and second source seat, it is characterised in that：In the outside difference of two FETs
A resistance protection FET is connect, and increasing a diode prevents the first power supply to be connected with second source by resistance, the
The input of one power supply has a voltage-stabiliser tube, and two triodes are set between the first power supply and second source.
2. low pressure drop reverse-filling main power supply automatic switch-over circuit as claimed in claim 1, it is characterised in that：First electricity
Source is main power source, and second source is stand-by power supply.
3. low pressure drop reverse-filling main power supply automatic switch-over circuit as claimed in claim 1, it is characterised in that：The door of voltage-stabiliser tube
Limit is slightly larger than second source.
4. low pressure drop reverse-filling main power supply automatic switch-over circuit as claimed in claim 1, it is characterised in that：Triode emission
Pole is grounded, and base stage connects the first power supply and second source respectively.
5. low pressure drop reverse-filling main power supply automatic switch-over circuit as claimed in claim 1, it is characterised in that：The voltage-stabiliser tube
For Schottky diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720639279.7U CN206807131U (en) | 2017-06-05 | 2017-06-05 | A kind of low pressure drop reverse-filling main power supply automatic switch-over circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720639279.7U CN206807131U (en) | 2017-06-05 | 2017-06-05 | A kind of low pressure drop reverse-filling main power supply automatic switch-over circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206807131U true CN206807131U (en) | 2017-12-26 |
Family
ID=60745210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720639279.7U Expired - Fee Related CN206807131U (en) | 2017-06-05 | 2017-06-05 | A kind of low pressure drop reverse-filling main power supply automatic switch-over circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206807131U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11817852B1 (en) * | 2023-03-07 | 2023-11-14 | Mass Power Electronics Inc. | Anti-backflow output switch |
-
2017
- 2017-06-05 CN CN201720639279.7U patent/CN206807131U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11817852B1 (en) * | 2023-03-07 | 2023-11-14 | Mass Power Electronics Inc. | Anti-backflow output switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171226 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |