CN206629048U - Analog quantity isolation circuit, charging equipment and the electrical changing station of alternating current-direct current charging interconnection - Google Patents
Analog quantity isolation circuit, charging equipment and the electrical changing station of alternating current-direct current charging interconnection Download PDFInfo
- Publication number
- CN206629048U CN206629048U CN201720327580.4U CN201720327580U CN206629048U CN 206629048 U CN206629048 U CN 206629048U CN 201720327580 U CN201720327580 U CN 201720327580U CN 206629048 U CN206629048 U CN 206629048U
- Authority
- CN
- China
- Prior art keywords
- optocoupler
- analog quantity
- amplifier
- isolation circuit
- diode
- 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.)
- Active
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of analog quantity isolation circuit, charging equipment and electrical changing station for alternating current-direct current charging interconnection.Wherein, the analog quantity isolation circuit for alternating current-direct current charging interconnection includes the first optocoupler, the second optocoupler and the first amplifier.Wherein, the first optocoupler works in linear stage.Second optocoupler works in linear stage and connected with the first optocoupler, and its output end feeds back to the input of the first amplifier.First amplifier and the second optocoupler share same power supply, and its output end is connected to the input of the first optocoupler.The utility model is operated in the optocoupler of the series connection of linear stage by using two-way, and the output of one of optocoupler is allowed to feed back to the input of the first amplifier, form servo feedback loop, so as to solve the technical problem for the isolation for how simply and reliablely realizing analog quantity, also with cost it is low the advantages of.
Description
Technical field
Charging and conversion electric technical field is the utility model is related to, more particularly, to a kind of analog quantity for alternating current-direct current charging interconnection
Isolation circuit, charging equipment and electrical changing station.
Background technology
Generally, in alternating current-direct current charging equipment, charging equipment and it is electrically charged shaking hands between equipment and passes through pulse-width modulation PWM
Realized with voltage back production, need to isolate it to improve reliability and stability.Analog quantity isolation circuit is typically by mould
Intend isolating chip, or isolated after analog quantity is converted to digital quantity.The cost height and complex circuit of this mode.Charging
During, the analog acquisition of the charging inlet of charging equipment to charging equipment is simple, threshold value is wider.
In view of this, it is special to propose the utility model.
Utility model content
It has been the isolation for solving how simply and reliablely to realize analog quantity to solve above mentioned problem of the prior art
Technical problem, there is provided a kind of analog quantity isolation circuit of alternating current-direct current charging interconnection.In addition, a kind of charging equipment is also provided and changed
Power station.
To achieve these goals, on the one hand, following technical scheme is provided：
A kind of analog quantity isolation circuit of alternating current-direct current charging interconnection, the circuit include：
First optocoupler, it works in linear stage；
Second optocoupler, it works in linear stage and connected with the first optocoupler, and its output end feeds back to the first amplifier
Input；
First amplifier, same power supply is shared with the second optocoupler, and its output end is connected to the input of the first optocoupler.
Preferably, analog quantity isolation circuit also includes：
Second amplifier, it is connected with the output end of the first optocoupler, and shares same power supply with the first optocoupler.
Preferably, analog quantity isolation circuit also includes：
Control circuit, for by control the first amplifier input voltage, to control the output current of the first amplifier,
Realize that the first optocoupler and the second optocoupler work in linear stage.
Preferably, control circuit includes：
Bleeder circuit, for being depressured to the input voltage of the first amplifier；
Current-limiting circuit, for the output current of the first amplifier to be limited within a predetermined range.
Preferably, bleeder circuit includes：First resistor, second resistance, the first diode, the second diode and the three or two pole
Pipe；Wherein, one end of the negative electrode connection first resistor of the first diode, the one of the other end connection second resistance of first resistor
End, the other end of second resistance connect the input of the first amplifier；The negative electrode of the anode of first diode and the second diode
The common port of connected and connection end connection first resistor and second resistance；The negative electrode connection power supply of first diode, the two or two
The plus earth of pole pipe.
Preferably, bleeder circuit also includes：
Bi-directional voltage stabilizing circuit, its one end connect the anode of the first diode, other end ground connection.
Preferably, current-limiting circuit is resistance.
Preferably, the second amplifier is emitter follower.
Preferably, the first optocoupler and the second optocoupler are linear optical coupling.
To achieve these goals, on the other hand, there is provided following technical scheme：
A kind of charging equipment, including the above-mentioned analog quantity isolation circuit stated.
To achieve these goals, another aspect, there is provided following technical scheme：
A kind of electrical changing station, it includes above-mentioned charging equipment.
The utility model provides a kind of analog quantity isolation circuit, charging equipment and the electrical changing station of alternating current-direct current charging interconnection.Its
In, the analog quantity isolation circuit of alternating current-direct current charging interconnection includes the first optocoupler, the second optocoupler and the first amplifier.Wherein, first
Optocoupler works in linear stage.Second optocoupler works in linear stage and connected with the first optocoupler, and its output end feeds back to
The input of one amplifier.First amplifier and the second optocoupler share same power supply, and its output end is connected to the first optocoupler
Input.The utility model is operated in the optocoupler of the series connection of linear stage by using two-way, and allows one of optocoupler
Output feeds back to the input of the first amplifier, forms servo feedback loop, simulation how is simply and reliablely realized so as to solve
The technical problem of the isolation of amount, also with cost it is low the advantages of.
Scheme 1, a kind of analog quantity isolation circuit of alternating current-direct current charging interconnection, it is characterised in that the circuit includes：
First optocoupler, it works in linear stage；
Second optocoupler, it works in linear stage and connected with first optocoupler, and its output end feeds back to first and put
The input of big device；
First amplifier, same power supply is shared with second optocoupler, and its output end is connected to described first
The input of optocoupler.
Scheme 2, the analog quantity isolation circuit according to scheme 1, it is characterised in that the analog quantity isolation circuit is also wrapped
Include：
Second amplifier, it is connected with the output end of first optocoupler, and shares same power supply with first optocoupler.
Scheme 3, the analog quantity isolation circuit according to scheme 1, it is characterised in that the analog quantity isolation circuit is also wrapped
Include：
Control circuit, for the input voltage by controlling first amplifier, to control first amplifier
Output current, realize that first optocoupler and second optocoupler work in linear stage.
Scheme 4, the analog quantity isolation circuit according to scheme 3, it is characterised in that the control circuit includes：
Bleeder circuit, for being depressured to the input voltage of first amplifier；
Current-limiting circuit, for the output current of first amplifier to be limited within a predetermined range.
Scheme 5, the analog quantity isolation circuit according to scheme 4, it is characterised in that the bleeder circuit includes：First
Resistance, second resistance, the first diode, the second diode and the 3rd diode；Wherein, the negative electrode connection of first diode
One end of the first resistor, the other end of the first resistor connect one end of the second resistance, the second resistance
The other end connects the input of first amplifier；The negative electrode phase of the anode of first diode and second diode
Even and the connection end connects the common port of the first resistor and the second resistance；The negative electrode connection electricity of first diode
Source, the plus earth of second diode.
Scheme 6, the analog quantity isolation circuit according to scheme 5, it is characterised in that the bleeder circuit also includes：
Bi-directional voltage stabilizing circuit, its one end connect the anode of first diode, other end ground connection.
Scheme 7, the analog quantity isolation circuit according to scheme 4, it is characterised in that the current-limiting circuit is resistance.
Scheme 8, the analog quantity isolation circuit according to scheme 2, it is characterised in that second amplifier be emitter-base bandgap grading with
With device.
Scheme 9, the analog quantity isolation circuit according to scheme 1, it is characterised in that first optocoupler and described second
Optocoupler is linear optical coupling.
Scheme 10, a kind of charging equipment, it is characterised in that including any described analog quantity isolation circuit in scheme 1-9.
Scheme 11, a kind of electrical changing station, it is characterised in that including the charging equipment described in scheme 10.
Brief description of the drawings
Fig. 1 is to be shown according to the structure of the analog quantity isolation circuit for being used for alternating current-direct current charging interconnection of the utility model embodiment
It is intended to；
Fig. 2 is the knot according to the analog quantity isolation circuit for being used for alternating current-direct current charging interconnection of another embodiment of the utility model
Structure schematic diagram；
Fig. 3 is the structural representation according to the charging equipment of the utility model embodiment；
Fig. 4 is the structural representation according to the electrical changing station of the utility model embodiment.
Embodiment
Preferred embodiment of the present utility model described with reference to the accompanying drawings.It should be understood by those skilled in the art that
It is that these embodiments are used only for explaining technical principle of the present utility model, it is not intended that limit protection of the present utility model
Scope.
Analog quantity isolation circuit provided by the utility model can be used in charging equipment and charging equipment charging inlet
Between analog quantity isolation.Wherein, charging equipment can be electric automobile, electric bicycle etc..
The utility model provides a kind of analog quantity isolation circuit of alternating current-direct current charging interconnection.As shown in figure 1, the circuit 10 wraps
Include：First optocoupler 11, the second optocoupler 12 and the first amplifier 13.Wherein, the first optocoupler 11 works in linear stage.Second optocoupler
12 work in linear stage and are connected with the first optocoupler, and its output end feeds back to the input of the first amplifier.First amplification
The optocoupler of device 13 and second shares same power supply, and its output end is connected to the input of the first optocoupler.
Wherein, optocoupler (i.e. photoelectric coupled device) is by the way that luminescent device and light-sensitive device are fitted together, using light as matchmaker
Be situated between, realize the electrical isolation between input and output, its destroy " the route of transmission disturbed, cut off interference signal entrance
The approach of subsequent conditioning circuit, it restrained effectively spike and various noise jammings.
By taking the type optocouplers of TLP 521 as an example, it close to linear transfer, is more than this scope in low current segment (0.03-5mA)
It is non-linear.TLP521 interior light emitting diodes issue light irradiation phototriode in electric current driving, after the phototriode light
Produce photo-generated carrier injection launch site and produce dissufion current, the electric current is exaggerated (it is required that in current collection between colelctor electrode and base stage
Add forward voltage between pole and base stage).So by controlling the electric current of optocoupler to ensure that optocoupler is operated in linear stage.
In the utility model, by making the first amplifier and the second optocoupler share same power supply so that the first amplifier with
Phototriode (as servo photoelectric tube) in second optocoupler uses same power supply, can so cause the input of isolation circuit
Isolated from power is realized between circuit and output circuit.
Above-mentioned second optocoupler constitutes the output loop of isolation circuit.
The utility model is by using above-mentioned technical proposal, using the optocouplers for working in linear stage of two series connection, this
Sample, the light emitting diode series connection in two optocouplers, the two light emitting diodes flow through identical electric current, and then cause two optocouplers
In two phototriode light it is identical；The technical program makes the output end of one of optocoupler feed back to the first amplifier again
Input, so as to be that phototriode in the optocoupler forms servo feedback loop, so the utility model solve how
Simply and reliablely realize the technical problem of the isolation of analog quantity.
In some embodiments, the utility model can also include the second amplifier.Second amplifier and the first light
The output end of coupling is connected, and shares same power supply with the first optocoupler.
The utility model realizes the input circuit of isolation circuit by the way that the second amplifier and the first optocoupler are shared into power supply
Isolated from power between output circuit.
In some embodiments, above-mentioned analog quantity isolation circuit can also include control circuit.The control circuit is used for
By controlling the input voltage of the first amplifier, to control the output current of the first amplifier, the first optocoupler and the second light are realized
Coupling works in linear stage.
Wherein, control circuit specifically includes bleeder circuit and current-limiting circuit.Wherein bleeder circuit is used for the first amplifier
Input voltage be depressured.Current-limiting circuit is used for the output current limitation of the first amplifier within a predetermined range.
For example, the utility model can be input to the voltage of the first amplifier by 0 by bleeder circuit
~12V be reduced to 0~4V (such as：4V、3V、2V、1.33V)；Again by current-limiting resistance (such as：1K Ω resistance) first is amplified
The output current of device is limited in 0~4mA.
Specifically, above-mentioned bleeder circuit includes：First resistor, second resistance, the first diode, the second diode and the 3rd
Diode；Wherein, one end of the negative electrode connection first resistor of the first diode, the other end connection second resistance of first resistor
One end, the other end of second resistance connect the input of the first amplifier；The moon of the anode of first diode and the second diode
The extremely connected and common port of connection end connection first resistor and second resistance；The negative electrode connection power supply of first diode, second
The plus earth of diode.
Preferably, above-mentioned bleeder circuit can also include bi-directional voltage stabilizing circuit.One end connection the of the bi-directional voltage stabilizing circuit
The anode of one diode, other end ground connection.
Preferably, above-mentioned current-limiting circuit is resistance.
Preferably, above-mentioned second amplifier is emitter follower.
The utility model can be increased defeated by using output of the emitter follower (abbreviation emitter follower) as isolation circuit
Enter impedance and reduce output impedance, so as to improve the carrying load ability of isolation circuit.
Preferably, above-mentioned first optocoupler and above-mentioned second optocoupler are linear optical coupling.
The utility model is described in detail with a preferred embodiment with reference to Fig. 2.
As shown in Fig. 2 bi-directional voltage stabilizing pipe carries out voltage stabilizing to input voltage, then, the input voltage passes through the first diode,
So that more than first diode turn-on voltage voltage signal by, partial pressure is then carried out by first resistor and second resistance,
Finally the voltage signal after partial pressure is inputted to the first amplifier.Wherein, the second diode and the 3rd diode play protection
Effect.First optocoupler is connected with the second optocoupler.Second optocoupler and the first amplifier form servo feedback loop, and the two shares the
One power supply.First optocoupler and the second amplifier form output loop, and the two shares second source.Second amplifier can receive
The charging inlet of charging equipment.Thus, this preferred embodiment realizes the isolation of analog quantity by using two-way optocoupler, has letter
The advantages of list, low reliable and cost.
In addition, the utility model also provides a kind of charging equipment.As shown in figure 3, the charging equipment 30 includes above-mentioned simulation
Measure isolation circuit 31.
Above-mentioned analog quantity isolation circuit is may refer to about operation principle of the present utility model, acquired technique effect
The related description of technical scheme, will not be repeated here.
Furthermore the utility model also provides a kind of electrical changing station.As shown in figure 4, the electrical changing station 40 can include above-mentioned charging
Equipment 41.
Above-mentioned analog quantity isolation circuit is may refer to about operation principle of the present utility model, acquired technique effect
The related description of technical scheme, will not be repeated here.
So far, combined preferred embodiment shown in the drawings describes the technical solution of the utility model, still, this
Art personnel are it is easily understood that the scope of protection of the utility model is expressly not limited to these embodiments.
On the premise of principle of the present utility model, those skilled in the art can make equivalent change to correlation technique feature
Or replace, the technical scheme after these are changed or replaced it is fallen within the scope of protection of the utility model.
Claims (11)
1. a kind of analog quantity isolation circuit of alternating current-direct current charging interconnection, it is characterised in that the circuit includes：
First optocoupler, it works in linear stage；
Second optocoupler, it works in linear stage and connected with first optocoupler, and its output end feeds back to the first amplifier
Input；
First amplifier, same power supply is shared with second optocoupler, and its output end is connected to first optocoupler
Input.
2. analog quantity isolation circuit according to claim 1, it is characterised in that the analog quantity isolation circuit also includes：
Second amplifier, it is connected with the output end of first optocoupler, and shares same power supply with first optocoupler.
3. analog quantity isolation circuit according to claim 1, it is characterised in that the analog quantity isolation circuit also includes：
Control circuit, for the input voltage by controlling first amplifier, to control the output of first amplifier
Electric current, realize that first optocoupler and second optocoupler work in linear stage.
4. analog quantity isolation circuit according to claim 3, it is characterised in that the control circuit includes：
Bleeder circuit, for being depressured to the input voltage of first amplifier；
Current-limiting circuit, for the output current of first amplifier to be limited within a predetermined range.
5. analog quantity isolation circuit according to claim 4, it is characterised in that the bleeder circuit includes：First resistor,
Second resistance, the first diode, the second diode and the 3rd diode；Wherein, described in the negative electrode connection of first diode
One end of first resistor, the other end of the first resistor connect one end of the second resistance, the second resistance it is another
End connects the input of first amplifier；The anode of first diode be connected with the negative electrode of second diode and
The connection end connects the common port of the first resistor and the second resistance；The negative electrode connection power supply of first diode,
The plus earth of second diode.
6. analog quantity isolation circuit according to claim 5, it is characterised in that the bleeder circuit also includes：
Bi-directional voltage stabilizing circuit, its one end connect the anode of first diode, other end ground connection.
7. analog quantity isolation circuit according to claim 4, it is characterised in that the current-limiting circuit is resistance.
8. analog quantity isolation circuit according to claim 2, it is characterised in that second amplifier is emitter following
Device.
9. analog quantity isolation circuit according to claim 1, it is characterised in that first optocoupler and second optocoupler
For linear optical coupling.
10. a kind of charging equipment, it is characterised in that including any described analog quantity isolation circuit in claim 1-9.
11. a kind of electrical changing station, it is characterised in that including the charging equipment described in claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720327580.4U CN206629048U (en) | 2017-03-30 | 2017-03-30 | Analog quantity isolation circuit, charging equipment and the electrical changing station of alternating current-direct current charging interconnection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720327580.4U CN206629048U (en) | 2017-03-30 | 2017-03-30 | Analog quantity isolation circuit, charging equipment and the electrical changing station of alternating current-direct current charging interconnection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206629048U true CN206629048U (en) | 2017-11-10 |
Family
ID=60206361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720327580.4U Active CN206629048U (en) | 2017-03-30 | 2017-03-30 | Analog quantity isolation circuit, charging equipment and the electrical changing station of alternating current-direct current charging interconnection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206629048U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109669503A (en) * | 2018-12-13 | 2019-04-23 | 朱嘉慧 | Isolated amplifier and its controlled ratio source and integral controlled source and mutual coupling device |
-
2017
- 2017-03-30 CN CN201720327580.4U patent/CN206629048U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109669503A (en) * | 2018-12-13 | 2019-04-23 | 朱嘉慧 | Isolated amplifier and its controlled ratio source and integral controlled source and mutual coupling device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105264767B (en) | Electronic equipment, the method for amplifying envelope signal, equipment and computer-readable medium | |
| CN107592700A (en) | A kind of photovoltaic MPPT types constant current integrated street lamp controller circuitry | |
| CN107659160A (en) | A kind of DC DC constant-current circuits | |
| CN207283505U (en) | APS amplifier power supply circuit and amplifier system | |
| CN201286184Y (en) | Multipath outputting constant current LED driver circuit | |
| CN104767117A (en) | High-speed laser device driving circuit | |
| CN206629048U (en) | Analog quantity isolation circuit, charging equipment and the electrical changing station of alternating current-direct current charging interconnection | |
| CN201869400U (en) | LED (light-emitting diode) lamp drive circuit | |
| CN103326579B (en) | Magnetic isolation feedback circuit | |
| CN103580671A (en) | NPN/PNP on-off signal converter | |
| CN202111796U (en) | Constant current drive circuit and television set | |
| CN203278656U (en) | Switching power supply, and optoelectronic coupler isolation transmission circuit for digital-control switching power supply | |
| CN105797303B (en) | EMS draught control devices | |
| CN202035185U (en) | Light-emitting diode (LED) current feedback control circuit and television | |
| CN203225910U (en) | LED drive circuit | |
| CN104242615A (en) | High-temperature isolated power device | |
| CN204334501U (en) | A kind of push-pull type high resistant isolated amplifier | |
| CN103117659A (en) | Current closed-loop control circuit for series load resonant converter | |
| CN201153258Y (en) | Avalanche photodiode bias circuit and optical transmission equipment having the circuit | |
| CN202172506U (en) | Light emitting diode (LED) drive circuit and constant current feedback circuit in same | |
| CN205452170U (en) | Relay drive circuit of battery management system of electric automobile | |
| CN107770909A (en) | Linear constant current electric light drive circuit, integrated circuit and control system | |
| CN204104190U (en) | LED drive power and LED display | |
| CN101795116B (en) | Regulation and control device of optical time delay unit | |
| CN207266331U (en) | A kind of constant current output circuit and lighting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |