CN107703345A - 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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- CN107703345A CN107703345A CN201711090674.5A CN201711090674A CN107703345A CN 107703345 A CN107703345 A CN 107703345A CN 201711090674 A CN201711090674 A CN 201711090674A CN 107703345 A CN107703345 A CN 107703345A
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- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 239000004065 semiconductor Substances 0.000 claims abstract description 39
- 101150037009 pin1 gene Proteins 0.000 claims abstract description 3
- 230000002146 bilateral effect Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 101001128814 Pandinus imperator Pandinin-1 Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
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- Geophysics And Detection Of Objects (AREA)
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, metal-oxide-semiconductor Q1 S poles and Q2 D poles are connected to network transformer T3 pin1, and metal-oxide-semiconductor Q3 S poles and Q4 D poles are connected to network transformer T3 pin3；Metal-oxide-semiconductor Q1, Q3 D poles pass through resistance R1 connections CPU；Metal-oxide-semiconductor Q4 S poles are connected to metal-oxide-semiconductor Q1 and Q3 D poles by resistance R3；This is galvanically isolated the position of detection circuit in the transformer circuit：Network transformer T3 pin8 is connected to the midpoint that the left bridge Q5 of full-bridge connects with Q6, and pin7 is connected to main transformer T4 primary one end.
Description
Technical field
The present invention relates to electricity field, and detection electricity is galvanically isolated more particularly, to a kind of new full-bridge transformer
Road.
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.
The content of the invention
The present invention is to overcome the above situation insufficient, it is desirable to provide a kind of technical scheme 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, electric capacity 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 Q2 D poles are connected to network transformer T3
Pin1, the S poles of the metal-oxide-semiconductor Q3 and Q4 D poles are connected to network transformer T3 pin3；Described metal-oxide-semiconductor Q1, Q3 D
Pole passes through resistance R1 connections CPU；The S poles of the metal-oxide-semiconductor Q4 are connected to metal-oxide-semiconductor Q1 and Q3 D poles by resistance R3；
This is galvanically isolated the position of detection circuit in the transformer circuit：Network transformer T3 pin8 is connected to the left bridge of full-bridge
The midpoint that Q5 connects with Q6, pin7 are connected to main transformer T4 primary one end.
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 electric capacity 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 invention are as follows：
1st, the present invention introduces a kind of full-bridge circuit transformer current detection circuit, and detection electric current simply takes onboard sky
Between it is small, 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 advantageous to improve the power density of complete machine on onboard.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying 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
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Refer to Fig. 1-2, in the embodiment of the present invention, a kind of new full-bridge transformer is galvanically isolated detection electricity
Road, including network transformer T3, metal-oxide-semiconductor Q1, Q2, Q3, Q4, resistance R1, R3, electric capacity C1 and bilateral diode D1, the metal-oxide-semiconductor
Q1 and Q3 series connection, 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 poles of the metal-oxide-semiconductor Q1
Network transformer T3 pin1 is connected to Q2 D poles, the S poles of the metal-oxide-semiconductor Q3 and Q4 D poles are connected to network transformation
Device T3 pin3；Described metal-oxide-semiconductor Q1, Q3 D poles pass through resistance R1 connections CPU；The S poles of the metal-oxide-semiconductor Q4 are connected by resistance R3
It is connected to metal-oxide-semiconductor Q1 and Q3 D poles；The S poles ground connection of the metal-oxide-semiconductor Q4；One end that the resistance R1 is connected with CPU passes through electric capacity C1
Ground connection；One end that the resistance R1 is connected with CPU is connected with bilateral diode D1, bilateral diode D1 one end ground connection.
This is galvanically isolated the position of detection circuit in actual applications：Network transformer T3 pin8 is connected to a full-bridge left side
The midpoint that bridge Q5 connects with Q6, pin7 are connected to main transformer T4 primary one end.
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 present invention simply takes that onboard space is small, and Material Cost is low, and sensed current signal value scope is wide, essence
Degree is 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
Height, the advantages that distortion factor is small.More save space is advantageous to improve the power density of complete machine on onboard.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as to the involved claim of limitation.
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, electric capacity 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 Q2 D poles are connected to network
Transformer T3 pin1, the S poles of the metal-oxide-semiconductor Q3 and Q4 D poles are connected to network transformer T3 pin3；The metal-oxide-semiconductor
Q1, Q3 D poles pass through resistance R1 connections CPU；The S poles of the metal-oxide-semiconductor Q4 are connected to metal-oxide-semiconductor Q1 and Q3 D poles by resistance R3；
This is galvanically isolated the position of detection circuit in the transformer circuit：Network transformer T3 pin8 is connected to the left bridge of full-bridge
The midpoint that Q5 connects with Q6, pin7 are connected to main transformer T4 primary one end.
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 electric capacity 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 |
|---|---|---|---|
| CN201711090674.5A CN107703345A (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 |
|---|---|---|---|
| CN201711090674.5A CN107703345A (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 |
|---|---|
| CN107703345A true CN107703345A (en) | 2018-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711090674.5A Pending CN107703345A (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 |
|---|---|---|---|---|
| CN117871930A (en) * | 2024-03-08 | 2024-04-12 | 广东高斯宝电气技术有限公司 | CT detection circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636676A (en) * | 2011-02-12 | 2012-08-15 | 中兴通讯股份有限公司 | Bridge-type current detecting circuit |
| CN103049028A (en) * | 2012-11-28 | 2013-04-17 | 华中科技大学 | Constant current source for high voltage magnetic switch resetting |
| CN203566108U (en) * | 2013-11-26 | 2014-04-30 | 上海通用重工集团有限公司 | Output current detection circuit of inverter welder based on alternating current signal |
| CN203572862U (en) * | 2013-11-26 | 2014-04-30 | 国家电网公司 | Current isolation transformer |
| CN207318577U (en) * | 2017-11-08 | 2018-05-04 | 合肥东胜汽车电子有限公司 | A kind of new full-bridge transformer is galvanically isolated detection circuit |
-
2017
- 2017-11-08 CN CN201711090674.5A patent/CN107703345A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636676A (en) * | 2011-02-12 | 2012-08-15 | 中兴通讯股份有限公司 | Bridge-type current detecting circuit |
| CN103049028A (en) * | 2012-11-28 | 2013-04-17 | 华中科技大学 | Constant current source for high voltage magnetic switch resetting |
| CN203566108U (en) * | 2013-11-26 | 2014-04-30 | 上海通用重工集团有限公司 | Output current detection circuit of inverter welder based on alternating current signal |
| CN203572862U (en) * | 2013-11-26 | 2014-04-30 | 国家电网公司 | Current isolation transformer |
| CN207318577U (en) * | 2017-11-08 | 2018-05-04 | 合肥东胜汽车电子有限公司 | A kind of new full-bridge transformer is galvanically isolated detection circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117871930A (en) * | 2024-03-08 | 2024-04-12 | 广东高斯宝电气技术有限公司 | CT detection circuit |
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