CN207318577U - A kind of new full-bridge transformer is galvanically isolated detection circuit - Google Patents
A kind of new full-bridge transformer is galvanically isolated detection circuit Download PDFInfo
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- CN207318577U CN207318577U CN201721476848.7U CN201721476848U CN207318577U CN 207318577 U CN207318577 U CN 207318577U CN 201721476848 U CN201721476848 U CN 201721476848U CN 207318577 U CN207318577 U CN 207318577U
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Abstract
A kind of new full-bridge transformer is galvanically isolated detection circuit, including network transformer T3, metal-oxide-semiconductor Q1, Q2, Q3, Q4, resistance R1, R3, metal-oxide-semiconductor Q1 and the Q3 series connection, metal-oxide-semiconductor Q2 and Q4 connect, Q1, Q3 of series connection and Q2, Q4 of series connection are in parallel, the S poles of metal-oxide-semiconductor Q1 and the D poles of Q2 are connected to the pin1 of network transformer T3, and the S poles of metal-oxide-semiconductor Q3 and the D poles of Q4 are connected to the pin3 of network transformer T3；The D poles of metal-oxide-semiconductor Q1, Q3 pass through resistance R1 connections CPU；The S poles of metal-oxide-semiconductor Q4 are connected to the D poles of metal-oxide-semiconductor Q1 and Q3 by resistance R3；This is galvanically isolated the position of detection circuit in the transformer circuit：The pin8 of network transformer T3 is connected to the midpoint that the left bridge Q5 of full-bridge is connected with Q6, and pin7 is connected to primary one end of main transformer T4.
Description
Technical field
Electricity field is the utility model is related to, inspection is galvanically isolated more particularly, to a kind of new full-bridge transformer
Slowdown monitoring circuit.
Background technology
In present circuit engineering, more using Hall sensor detection electric current, isolation detection integrated chip detection electric current or
Current sense transformer adds diode rectifier circuit to detect；The onboard space of Hall sensor detection occupancy is big, and layout is not square
Just, cost is higher, and sensed current signal value is fluctuated in reference voltage level, and accuracy of detection is low；Isolation detection integrated chip
Formula, cost is higher, and sensed current signal value is fluctuated in reference voltage level, and accuracy of detection is low.Current sense transformer adds
Diode rectifier circuit, because diode has conduction voltage drop in diode rectification and diode turning-on voltage is larger, detection is small
Signal can distortion.
Utility model content
The utility model is to overcome the above situation insufficient, it is desirable to provide a kind of technical solution that can be solved the above problems.
A kind of new full-bridge transformer is galvanically isolated detection circuit, including network transformer T3, metal-oxide-semiconductor Q1,
Q2, Q3, Q4, resistance R1, R3, capacitance C1 and bilateral diode D1, metal-oxide-semiconductor Q1 and the Q3 series connection, metal-oxide-semiconductor Q2 and the Q4 string
Connection, Q1, Q3 of series connection and Q2, Q4 of series connection are in parallel, and the S poles of the metal-oxide-semiconductor Q1 and the D poles of Q2 are connected to network transformer T3
Pin1, the S poles of the metal-oxide-semiconductor Q3 and the D poles of Q4 are connected to the pin3 of network transformer T3；The D of described metal-oxide-semiconductor Q1, Q3
Pole passes through resistance R1 connections CPU；The S poles of the metal-oxide-semiconductor Q4 are connected to the D poles of metal-oxide-semiconductor Q1 and Q3 by resistance R3；
This is galvanically isolated the position of detection circuit in the transformer circuit：The pin8 of network transformer T3 is connected to full-bridge
The midpoint that left bridge Q5 is connected with Q6, pin7 are connected to primary one end of main transformer T4.
Preferably, the S poles ground connection of the metal-oxide-semiconductor Q4.
Preferably, one end that the resistance R1 is connected with CPU is grounded by capacitance C1.
Preferably, one end that the resistance R1 is connected with CPU is connected with bilateral diode D1.
Preferably, one end ground connection of the bilateral diode D1.
Compared with prior art, the beneficial effects of the utility model are：
1st, the utility model introduces a kind of full-bridge circuit transformer current detection circuit, and detection electric current simply accounts for
Small with onboard space, Material Cost is low, and sensed current signal value scope is wide, and precision is high.
2nd, this programme adds the alternating current detection scheme of the controllable metal-oxide-semiconductor of full-bridge using network transformer, and cost is low, detection essence
The advantages that degree is high, and the distortion factor is small.More save space is conducive to improve the power density of complete machine on onboard.
The additional aspect and advantage of the utility model will be set forth in part in the description, partly by from following description
In become obvious, or recognized by the practice of the utility model.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, 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, before not making the creative labor property
Put, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is the position figure that a kind of new full-bridge transformer is galvanically isolated detection circuit；
Fig. 2 is the circuit diagram that a kind of new full-bridge transformer is galvanically isolated detection circuit.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained, shall fall within the protection scope of the present invention.
Please refer to Fig.1-2, in the utility model embodiment, a kind of new full-bridge transformer is galvanically isolated detection
Circuit, including network transformer T3, metal-oxide-semiconductor Q1, Q2, Q3, Q4, resistance R1, R3, capacitance C1 and bilateral diode D1, the MOS
Pipe Q1 and Q3 connect, and metal-oxide-semiconductor Q2 and the Q4 series connection, Q1, Q3 of series connection and Q2, Q4 of series connection are in parallel, the S of the metal-oxide-semiconductor Q1
Pole and the D poles of Q2 are connected to the pin1 of network transformer T3, and the S poles of the metal-oxide-semiconductor Q3 and the D poles of Q4 are connected to network change
The pin3 of depressor T3；The D poles of described metal-oxide-semiconductor Q1, Q3 pass through resistance R1 connections CPU；The S poles of the metal-oxide-semiconductor Q4 pass through resistance R3
It is connected to the D poles of metal-oxide-semiconductor Q1 and Q3；The S poles ground connection of the metal-oxide-semiconductor Q4；One end that the resistance R1 is connected with CPU passes through capacitance
C1 is grounded；One end that the resistance R1 is connected with CPU is connected with bilateral diode D1, one end ground connection of bilateral diode D1.
This is galvanically isolated the position of detection circuit in practical applications：The pin8 of network transformer T3 is connected to a full-bridge left side
The midpoint that bridge Q5 is connected with Q6, pin7 are connected to primary one end of main transformer T4.
T3 level connection of network transformer is 4 metal-oxide-semiconductors（Q1/Q2/Q3/Q4）The rectification circuit of composition, metal-oxide-semiconductor are being led
Pressure drop is low when logical, high to the accuracy of detection of small-signal, and the distortion factor is small.Signal after rectification is connected to ground by resistance R3, and will
Signal after rectification is input to CPU after RC is filtered.
The detection electric current of the utility model simply takes that onboard space is small, and Material Cost is low, sensed current signal value scope
Width, precision are high.
This programme adds the alternating current detection scheme of the controllable metal-oxide-semiconductor of full-bridge using network transformer, and cost is low, accuracy of detection
The advantages that height, the distortion factor is small.More save space is conducive to improve the power density of complete machine on onboard.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of the spirit or essential attributes without departing substantially from the utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new
The scope of type is indicated by the appended claims rather than the foregoing description, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are embraced therein.Any reference numeral in claim should not be considered as limitation
Involved claim.
Claims (5)
1. a kind of new full-bridge transformer is galvanically isolated detection circuit, including network transformer T3, metal-oxide-semiconductor Q1, Q2,
Q3, Q4, resistance R1, R3, capacitance C1 and bilateral diode D1, it is characterised in that metal-oxide-semiconductor Q1 and the Q3 series connection, the metal-oxide-semiconductor
Q2 and Q4 series connection, Q1, Q3 of series connection and Q2, Q4 of series connection are in parallel, and the S poles of the metal-oxide-semiconductor Q1 and the D poles of Q2 are connected to network
The pin1 of transformer T3, the S poles of the metal-oxide-semiconductor Q3 and the D poles of Q4 are connected to the pin3 of network transformer T3；The metal-oxide-semiconductor
The D poles of Q1, Q3 pass through resistance R1 connections CPU；The S poles of the metal-oxide-semiconductor Q4 are connected to the D poles of metal-oxide-semiconductor Q1 and Q3 by resistance R3；
This is galvanically isolated the position of detection circuit in the transformer circuit：The pin8 of network transformer T3 is connected to the left bridge of full-bridge
The midpoint that Q5 is connected with Q6, pin7 are connected to primary one end of main transformer T4.
2. a kind of new full-bridge transformer according to claim 1 is galvanically isolated detection circuit, its feature exists
In the S poles ground connection of the metal-oxide-semiconductor Q4.
3. a kind of new full-bridge transformer according to claim 1 is galvanically isolated detection circuit, its feature exists
In one end that the resistance R1 is connected with CPU is grounded by capacitance C1.
4. a kind of new full-bridge transformer according to claim 1 is galvanically isolated detection circuit, its feature exists
In one end that the resistance R1 is connected with CPU is connected with bilateral diode D1.
5. a kind of new full-bridge transformer according to claim 4 is galvanically isolated detection circuit, its feature exists
In one end ground connection of the bilateral diode D1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721476848.7U CN207318577U (en) | 2017-11-08 | 2017-11-08 | A kind of new full-bridge transformer is galvanically isolated detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721476848.7U CN207318577U (en) | 2017-11-08 | 2017-11-08 | A kind of new full-bridge transformer is galvanically isolated detection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207318577U true CN207318577U (en) | 2018-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721476848.7U Expired - Fee Related CN207318577U (en) | 2017-11-08 | 2017-11-08 | A kind of new full-bridge transformer is galvanically isolated detection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703345A (en) * | 2017-11-08 | 2018-02-16 | 合肥东胜汽车电子有限公司 | A kind of new full-bridge transformer is galvanically isolated detection circuit |
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2017
- 2017-11-08 CN CN201721476848.7U patent/CN207318577U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703345A (en) * | 2017-11-08 | 2018-02-16 | 合肥东胜汽车电子有限公司 | A kind of new full-bridge transformer is galvanically isolated detection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200213 Address after: 236000 No.39 Chaohu Road, Hefei modern industrial park, Yingzhou District, Fuyang City, Anhui Province Patentee after: Fuyang Dongsheng Auto Parts Co., Ltd Address before: 230088 Hefei high tech Zone, Hefei, Anhui Province, No. 2800 Hefei Innovation Industrial Park, two stage, 7 layer of G4 building Patentee before: Dongsheng Hefei Automotive Electronics Co., Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180504 Termination date: 20201108 |
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| CF01 | Termination of patent right due to non-payment of annual fee |