CN206962699U - A kind of linear isolation digitalizer of Switching Power Supply feedback analog amount - Google Patents
A kind of linear isolation digitalizer of Switching Power Supply feedback analog amount Download PDFInfo
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- CN206962699U CN206962699U CN201720707892.8U CN201720707892U CN206962699U CN 206962699 U CN206962699 U CN 206962699U CN 201720707892 U CN201720707892 U CN 201720707892U CN 206962699 U CN206962699 U CN 206962699U
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- circuit
- power supply
- switching power
- digitalizer
- analog amount
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Abstract
The utility model belongs to Unisolated switch power technique fields, discloses a kind of linear isolation digitalizer of Switching Power Supply feedback analog amount, and the linear isolation digitalizer of the Switching Power Supply feedback analog amount includes：Single-chip microcomputer；The single-chip microcomputer electrically connects with protection circuit, detection circuit and drive circuit；Output voltage sampling device electrically connects with voltage signal isolating device, and voltage signal isolating device electrically connects with AC/DC change-over circuits.Isolation type switching power supply of the present utility model has optical coupling isolator in input and output end, can will input and output isolation is got up, can avoid the danger got an electric shock；When abnormity of power supply, the influence to load is smaller, and easily realizes very wide input voltage range.
Description
Technical field
The utility model belongs to Unisolated switch power technique fields, more particularly to a kind of Switching Power Supply feedback analog amount
Linear isolation digitalizer.
Background technology
At present, traditional Unisolated switch power supply is directly connected in load end and input, and touch load just has tactile
The danger of electricity.With the most use at present is non-isolated direct step down supplies, that is, AC rectification is obtained direct current later
High pressure, the advantages of then directly carrying out decompression and current constant control non-isolated constant-current source with reduction voltage circuit are simple, efficiency highs, but by
Electrical isolation is carried out not over transformer between input and load end, input and load end altogether, cause what is got an electric shock
Possibility is very high, and poor anti jamming capability.
In summary, the problem of prior art is present be：The directly dangerous property of step down supplies non-isolated at present is very
Height, and poor anti jamming capability.
The content of the invention
The problem of existing for prior art, the utility model provide a kind of Switching Power Supply feedback analog amount it is linear every
From digitalizer.
The utility model is achieved in that a kind of linear isolation digitalizer of Switching Power Supply feedback analog amount, institute
Stating the linear isolation digitalizer of Switching Power Supply feedback analog amount includes：
Single-chip microcomputer；
The single-chip microcomputer electrically connects with protection circuit, detection circuit and drive circuit；
Output voltage sampling device is electrically connected with voltage signal isolating device, and voltage signal isolating device is changed with AC/DC
Circuit electrically connects.
Further, the protection circuit includes current foldback circuit, overvoltage crowbar, thermal-shutdown circuit, self diagnosis
Protection circuit；
The current foldback circuit, overvoltage crowbar, thermal-shutdown circuit, self diagnosis protection circuit are connected to list
The input of piece machine.
Further, the detection circuit includes current detection circuit, voltage detecting circuit；
The current detection circuit, voltage detecting circuit are connected to the input of single-chip microcomputer.
Further, the voltage signal isolating device is using 2 photoelectricity couplings with identical nonlinear transmission characteristic
Clutch T1 and T2, K1 (I1)=K2 (I1) and 2 emitter follower A1 and A2 compositions.
Further, the drive circuit is IGBT drive circuit.
The advantages of the utility model and good effect are：Isolation type switching power supply has light-coupled isolation in input and output end
Device, will can be inputted and output isolation is got up, and can avoid the danger got an electric shock；When abnormity of power supply, the influence to load is smaller, and
And easily realize very wide input voltage range；Linear isolation digitizing function will convert into the data signal output of standard, energy
It is enough that accurate measurement at a high speed is carried out to electrical parameters such as electric current, voltages, directly it can both connect with pointer gauge, digital display meter, can also be with
Automatic instrument(s) (such as PLC), various A/D converters and computer system mating.
The utility model has very high practicality in Switching Power Supply, and input voltage, output voltage can be carried out
Isolation, and a kind of digitized switching power unit of continuous data is realized, digitizing solution and voltage isolation method are used
In Switching Power Supply, voltage strength can be more accurately controlled, is reduced to greatest extent in abnormity of power supply to the shadow of load
Ring, avoid the danger got an electric shock, and easily realize very wide input voltage range.
Brief description of the drawings
Fig. 1 is the linear isolation digitalizer structure for the Switching Power Supply feedback analog amount that the utility model embodiment provides
Schematic diagram；
In figure：1st, single-chip microcomputer；2nd, drive circuit；3rd, output voltage sampling device；4th, voltage signal isolating device；5、AC/
DC change-over circuits；6th, protection circuit；7th, circuit is detected.
Embodiment
For invention, features and effects of the present utility model can be further appreciated that, following examples are hereby enumerated, and coordinate
Accompanying drawing describes in detail as follows.
Structure of the present utility model is explained in detail below in conjunction with the accompanying drawings.
As shown in figure 1, the linear isolation numeral makeup for the Switching Power Supply feedback analog amount that the utility model embodiment provides
Put including：Single-chip microcomputer 1, drive circuit 2, output voltage sampling device 3, voltage signal isolating device 4, AC/DC change-over circuits 5,
Protection circuit 6, detection circuit 7.
The single-chip microcomputer 1 uses STM32 series monolithics.
Single-chip microcomputer 1 electrically connects with protection circuit 6, detection circuit 7 and drive circuit 2.
Output voltage sampling device 3 is connected with voltage signal isolating device 4, and voltage signal isolating device 4 and AC/DC is changed
Circuit 5 electrically connects.
Voltage signal isolating device 4 is PC817 photo-couplers.Drive circuit 2 is IGBT drive circuit.
Protection circuit 6 includes current foldback circuit, overvoltage crowbar, thermal-shutdown circuit, self diagnosis protection circuit；Institute
State current foldback circuit, overvoltage crowbar, thermal-shutdown circuit, self diagnosis protection circuit and be connected to the defeated of single-chip microcomputer 1
Enter end.
Detecting circuit 7 includes current detection circuit, voltage detecting circuit；The current detection circuit, voltage detecting circuit
It is connected to the input of single-chip microcomputer 1.
Voltage signal isolating device 4 using 2 have identical nonlinear transmission characteristic photoelectrical coupler T1 and T2,
That is K1 (I1)=K2 (I1) and 2 emitter follower A1 and A2 compositions；The then voltage gain G=Uo/U1=I3R3/ of amplifier
I2R2=(R3/R2) [K1 (I1)/K2 (I1)]=R3/R2；It is former using feedback using the symmetry of T1 and T2 current transmission characteristics
Reason, compensation photoelectrical coupler T's is non-linear.
Drive circuit 2 is IGBT drive circuit；Single-chip microcomputer 1 sends power regulating signals (pulse signal), and IGBT is received
Regulate signal, by internal insulation, stabilization, amplify and export to 4 road IGBT power devices, and connect power device feedback letter
Number.
Described above is only to preferred embodiment of the present utility model, not the utility model is made any formal
Limitation, it is every according to the technical essence of the utility model to any simple modification made for any of the above embodiments, equivalent variations with
Modification, is belonged in the range of technical solutions of the utility model.
Claims (5)
- A kind of 1. linear isolation digitalizer of Switching Power Supply feedback analog amount, it is characterised in that the Switching Power Supply feedback The linear isolation digitalizer of analog quantity includes：Single-chip microcomputer；The single-chip microcomputer electrically connects with protection circuit, detection circuit and drive circuit；Output voltage sampling device electrically connects with voltage signal isolating device, voltage signal isolating device and AC/DC change-over circuits Electrical connection.
- 2. the linear isolation digitalizer of Switching Power Supply feedback analog amount as claimed in claim 1, it is characterised in that described Protection circuit includes current foldback circuit, overvoltage crowbar, thermal-shutdown circuit, self diagnosis protection circuit；The current foldback circuit, overvoltage crowbar, thermal-shutdown circuit, self diagnosis protection circuit are connected to single-chip microcomputer Input.
- 3. the linear isolation digitalizer of Switching Power Supply feedback analog amount as claimed in claim 1, it is characterised in that described Detecting circuit includes current detection circuit, voltage detecting circuit；The current detection circuit, voltage detecting circuit are connected to the input of single-chip microcomputer.
- 4. the linear isolation digitalizer of Switching Power Supply feedback analog amount as claimed in claim 1, it is characterised in that described Voltage signal isolating device is using 2 the photoelectrical coupler T1 and T2 with identical nonlinear transmission characteristic, and 2 penetrated Pole follower A1 and A2 composition.
- 5. the linear isolation digitalizer of Switching Power Supply feedback analog amount as claimed in claim 1, it is characterised in that described Drive circuit is IGBT drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720707892.8U CN206962699U (en) | 2017-06-16 | 2017-06-16 | A kind of linear isolation digitalizer of Switching Power Supply feedback analog amount |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720707892.8U CN206962699U (en) | 2017-06-16 | 2017-06-16 | A kind of linear isolation digitalizer of Switching Power Supply feedback analog amount |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206962699U true CN206962699U (en) | 2018-02-02 |
Family
ID=61379435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720707892.8U Active CN206962699U (en) | 2017-06-16 | 2017-06-16 | A kind of linear isolation digitalizer of Switching Power Supply feedback analog amount |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206962699U (en) |
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2017
- 2017-06-16 CN CN201720707892.8U patent/CN206962699U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | "change of name, title or address" |
Address after: Room 707-6, building 1, Suzhou nano City, No. 99, Jinjihu Avenue, Suzhou Industrial Park, Suzhou, Jiangsu Province Patentee after: Suzhou yinbian Photoelectric Technology Co., Ltd Address before: 710065 Shaanxi city of Xi'an province high tech Zone Jinye Road No. 32 Building 1 unit third Jin industry era 13 layer 11309. Patentee before: XI'AN ENBIENS PHOTOELECTRIC Co.,Ltd. |
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| CP03 | "change of name, title or address" |