CN108761173A - One kind being based on new-energy automobile inverter current detecting sensor - Google Patents
One kind being based on new-energy automobile inverter current detecting sensor Download PDFInfo
- Publication number
- CN108761173A CN108761173A CN201811011533.4A CN201811011533A CN108761173A CN 108761173 A CN108761173 A CN 108761173A CN 201811011533 A CN201811011533 A CN 201811011533A CN 108761173 A CN108761173 A CN 108761173A
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- energy automobile
- hall
- toroidal core
- current detecting
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- 238000001514 detection method Methods 0.000 claims abstract description 10
- 230000005355 Hall effect Effects 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims description 9
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000005674 electromagnetic induction Effects 0.000 claims 1
- 230000004907 flux Effects 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- 238000010424 printmaking Methods 0.000 claims 1
- 230000005611 electricity Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention discloses one kind being based on new-energy automobile inverter current detecting sensor, including being provided with two-way current detecting unit W phases and U phases in sensor, two-way current signal is carried out at the same time detection, it is provided with magnetic circuit and measuring circuit per road W phases or in U phases, the magnetic circuit includes toroidal core, affiliated measuring circuit includes Hall element and its periphery protection circuit, tested input current is passed through from toroidal core center, tested electric current is converted into magnetic field by toroidal core, Hall element is placed on toroidal core open center, Hall element ontology is perpendicular to the magnetic line of force, it recycles Hall effect that tested magnetic field is converted to Hall voltage to export.This sensor finally realizes low cost, highly reliable design requirement especially suitable for the current detectings occasion such as new-energy automobile inverter, motor, by rational parts selection and circuit design, solves the problems, such as to detect high current under small size in high precision.
Description
Technical field
The present invention relates to a kind of inverter current detection sensors, and in particular to one kind is based on new-energy automobile inverter electricity
Flow detecting sensor.
Background technology
Up to now, Chinese new-energy automobile has 77.7 ten thousand, it is contemplated that the year two thousand twenty will break through 2,000,000.With the country
The fast development of new-energy automobile market also increases therewith for the demand of new-energy automobile inverter current detecting sensor
It is more.The Hall current sensor for previously having used Switzerland LEM, there are on the high side, unsuitable large-scale uses.
Domestic traditional Hall current sensor is formed using separating component and wound core, and difficulty meets new-energy automobile
Detect the highly reliable and inexpensive demand of product.Additionally, it is contemplated that application environment is special, it is desirable that current sensor meet small size,
High current, Low Drift Temperature, it is highly reliable the features such as.
Invention content
The technical problem to be solved by the present invention is to existing Hall current sensor difficulties to meet new-energy automobile inverter electricity
The stream detection high current of product, small size, highly reliable and inexpensive detection demand are, and it is an object of the present invention to provide a kind of being based on new energy vapour
Vehicle inverter current detecting sensor, solves the problem above-mentioned.
The present invention is achieved through the following technical solutions：
One kind being based on new-energy automobile inverter current detecting sensor, including the inspection of two-way electric current is provided in sensor
It surveys unit W phases and U phases, two-way current signal is carried out at the same time detection, magnetic circuit and measuring circuit, institute are provided with per road W phases or in U phases
It includes toroidal core to state magnetic circuit, and affiliated measuring circuit includes that Hall element and its periphery protection circuit, Hall element are arranged in magnetic
Core open center, Hall element ontology are placed perpendicular to the magnetic line of force.This sensor is based on Hall open-loop principles, is tested input current
IOIt is passed through from magnetic core center, when there are input current signal IOWhen, magnetic core inside generates magnetic field Φ.Hall device H is by the magnetic of detection
Field Φ is converted to Hall voltage VHOutput.Since magnetic field Φ and hall device output have good linear relationship, can lead to
Cross Hall output potential VHReflection output indirectly is tested electric current IOSize.
The measuring circuit is in the layout of on printed board, and printed board uses four laminates.Hall device in the measuring circuit
Part is Integrated Hall IC can reduce product body since the device itself has been internally integrated the circuits such as signal acquisition, amplification and processing
Product.In order to improve product reliability, protection circuit is all devised around Hall IC, power supply and output port, is carried with this
The reliability of high entire product circuit.
Toroidal core in the magnetic circuit is realized using silicon steel punching, is pressed, can be reduced by tinertoy between silicon steel punching
Product cost and raising batch consistency.
Since operating environment requirements small product size is smaller, in order to improve tested electric current linear measurement range, the annular magnetic
Core (1) recommends that the silicon steel band of the high trade mark, opening is selected to be typically designed in 3mm~7mm.
The toroidal core is moulded in inside shell main casing, and for the measuring circuit layout in printed board, printed board is logical
It crosses location hole to be placed centrally on injection molding magnetic core, carrying out printed board by the structure of Housing bottom cover and shell main casing fixes.
Printed board output port devises gasket, is positioned over around output port.
The shell main casing and Housing bottom cover material uses PV66+30%GF or PBT+30%GF, new for meeting
- 40 DEG C~+125 DEG C of energy detecting field operating environment requirements.
Ultrasonic fusing line is devised between the Housing bottom cover and main casing, is carried out eventually by ultrasonic fusing mode
Sealing.Before sealing, the printed board, gasket are positioned in main casing as required.
The gasket is positioned between printed board output port and main casing bottom, can reduce repeatedly plug output end
Son, impact and oscillation etc. influence product stability.
Product mounting hole is designed on the main casing, mounting hole in special metal cylinder by being embedded in shell main casing
Mode realize.On the metal cylinder outer shroud it is provided with a certain size notch, is increased between shell mould-injection with this
Contact coefficient.
Compared with prior art, the present invention having at least the following advantages and advantageous effect：
The present invention carries out low-voltage power supply using Integrated Hall IC, can reduce small product size；By designing periphery protection circuit,
Product environment reliability can be promoted；Magnetic core uses silicon steel punching, is fixed by being molded into mode in shell, can reduce environment
Magnetic core performance is influenced, product stability is improved；It is sealed by ultrasonic fusing mode between shell main casing and bottom cover,
Product reliability can be promoted.Hall open-loop current detection technique phase is realized compared to conventionally employed separation hall device and Wound core
Than, product of the invention have small, current detection range is wide, at low cost, light-weight, low in energy consumption, temperature drift is low, stability and
The advantages such as reliability height, strong antijamming capability.A kind of new-energy automobile inverter current detecting sensor of the present invention is realized
Small size requires high current, multichannel, high-precision under occasion to detect, which also may extend to other current detecting occasions.
Description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is the circuit diagram of measuring circuit of the present invention.
Fig. 2 is core structure figure.
Fig. 3 is product embedded metal cylindrical section figure of the present invention.
Fig. 4 is the shape assumption diagram of product of the present invention.
1- magnetic cores, 2- metal cylinders.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment one
As shown in figures 1-4, the present invention is a kind of being based on new-energy automobile inverter current detecting sensor, can be used for small
Volume, high current, do not power off in the case of highly reliable, quick measurement.Current signal can be tested to two-way to be detected, for every
Include magnetic circuit and measuring circuit all the way, magnetic circuit includes toroidal core 1, and tested electric current is converted to magnetic field；Measuring circuit includes suddenly
That element and its peripheral circuit, Hall element centered vertical are put in 1 open center of toroidal core, will using Hall effect principle
Tested magnetic field is converted to Hall voltage output.By detect output Hall voltage, can indirect reaction be tested input current it is big
It is small.
Specifically, to improve product reliability, small product size is reduced, Hall element is realized using Integrated Hall IC, is passed through
The IC chip for selecting different sensitivity grade, can test different current specifications.
Embodiment two
As Figure 1 and Figure 4, the present embodiment optimizes on the basis of embodiment one, and J1 is the special plug-in of automotive grade
Terminal, for providing power supply and output interface；T1/T2 is two-way TVS diode, for power supply and output end EMC protection；N1/
N2 is Integrated Hall IC, realizes the magnetic field that toroidal core 1 detects being converted to Hall voltage output, and Hall IC pin 3 is grounded, carries
High ESD protection capability；C1 to Hall IC chip power supply power supply VCC for carrying out decoupling filtering；C2/C3/R1/R2 is for Hall electricity
Gesture output is filtered.Toroidal core 1 does not embody in the positions Fig. 1.
This sensor is powered using low pressure single supply 5V, and product quiescent dissipation is determined by Hall IC, generally 10mA.Hall
IC sensitivity KNGear selection is by the opening of toroidal core 1 l, output specification V0And tested size of current I0It determines.
Embodiment three
As shown in Fig. 2, the present embodiment optimizes on the basis of the above embodiments, 1 appearance and size of toroidal core is shown in Fig. 2
It is shown.Toroidal core 1 select high saturated magnetic induction, low-loss, low-coercivity silicon steel band, toroidal core 1 opening by
Tested size of current I0And magnetic material saturation induction density Br is determined.Toroidal core 1 selects punch die processing, and product batch can be improved
Consistency reduces product cost.Tinertoy position and size is not marked in figure.
Toroidal core 1 is fixed by way of being molded into shell, and mould-injection thickness is not less than 0.8mm, and glue recommends selection
PV66+30%GF or PBT+30%GF realizes the normal use under -40 DEG C~+125 DEG C environment.
Example IV
The present embodiment optimizes on the basis of the above embodiments, molten by ultrasonic wave between Housing bottom cover and main casing
The mode of connecing is sealed, and printed board occupy on injection molding magnetic core 1, is consolidated by shell main casing and Housing bottom cover internal structure
It is fixed.
Embodiment five
The present embodiment optimizes on the basis of the above embodiments, printed board output port and shell main casing bottom it
Between increase gasket, for reduce repeatedly plug, oscillation and impact on product stability influence.
Embodiment six
The present embodiment optimizes on the basis of the above embodiments, and product mounting hole, peace are provided on shell main casing
Dress hole embeds special metal cylinder, and cross-sectional view of the structure is as shown in Figure 3.Since metal cylinder 2 is small, it is embedded into shell main casing
Contact coefficient is small when in vivo, it is difficult to ensure that reliable in product is using installation process.2 outer diameter of metal cylinder is designed a certain size
Notch, can increase the contact coefficient between shell mould-injection, promote product installation and environmental reliability.
Using the scheme of the present embodiment, it can be achieved that small size, high current, highly reliable, low-power consumption, high-precision, Low Drift Temperature, low
Cost is easily installed maintenance, quickly measures new-energy automobile inverter current size, meets the inspection of new-energy automobile inverter current
Survey the market demand.
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect
It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not intended to limit the present invention
Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (7)
1. one kind being based on new-energy automobile inverter current detecting sensor, which is characterized in that including being provided in sensor
Two-way current detecting unit W phases and U phases, two-way current signal are carried out at the same time detection, per road W phases or U phases in be provided with magnetic circuit and
Measuring circuit, the magnetic circuit include toroidal core (1), and the measuring circuit includes Hall element and its peripheral circuit, is tested defeated
Enter electric current to pass through from toroidal core (1) center, tested electric current is converted to by magnetic field by electromagnetic induction, Hall element occupy annular
Detection magnetic field is converted to Hall voltage using Hall effect principle and exported by magnetic core (1) open center, measuring circuit periphery
Setting protection circuit, ensures the normal use in vehicle inverter with this.
2. according to claim 1 a kind of based on new-energy automobile inverter current detecting sensor, which is characterized in that
The measuring circuit is in the layout of on printed board, and the printed board is four laminates, and the Hall element is Integrated Hall IC, is integrated
3 pins ground connection in Hall IC, power end, ground terminal and the output end of Integrated Hall IC are provided with TVS diode and RC protection
Circuit.
3. one kind according to claim 1,2 is based on new-energy automobile inverter current detecting sensor, feature exists
In the toroidal core (1) is moulded in inside shell main casing, and the printed board is positioned by the location hole on main casing, print
Making sheet occupy between Housing bottom cover and injection molding magnetic core (1), is fixed by Housing bottom cover structure.
4. according to claim 3 a kind of based on new-energy automobile inverter current detecting sensor, which is characterized in that
The shell main casing is designed with mounting hole, embeds to enter on main casing by special metal cylinder (2) and realize.
5. according to claim 3 a kind of based on new-energy automobile inverter current detecting sensor, which is characterized in that
Gasket is installed, the gasket is close to output port surrounding between the printed board output port and shell main casing bottom
It places.
6. according to claim 4 a kind of based on new-energy automobile inverter current detecting sensor, which is characterized in that
It is provided with customization notch on special embedded metal cylinder (2) outer shroud.
7. according to claim 1 a kind of based on new-energy automobile inverter current detecting sensor, which is characterized in that
The toroidal core (1) is to improve consistency and reliability, and the size and structure of toroidal core (1) are according to maximum linear magnetic flux
It calculates, the toroidal core (1) uses silicon steel punching structure, is pressed by tinertoy between toroidal core (1) punching moulding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811011533.4A CN108761173A (en) | 2018-08-31 | 2018-08-31 | One kind being based on new-energy automobile inverter current detecting sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811011533.4A CN108761173A (en) | 2018-08-31 | 2018-08-31 | One kind being based on new-energy automobile inverter current detecting sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108761173A true CN108761173A (en) | 2018-11-06 |
Family
ID=63967879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811011533.4A Pending CN108761173A (en) | 2018-08-31 | 2018-08-31 | One kind being based on new-energy automobile inverter current detecting sensor |
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| Country | Link |
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| CN (1) | CN108761173A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112327037A (en) * | 2020-11-17 | 2021-02-05 | 深圳市海浦蒙特科技有限公司 | Hall current sensor module |
| CN118091230A (en) * | 2024-04-18 | 2024-05-28 | 苏州矩阵光电有限公司 | Hall current sensor |
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| JP2013054016A (en) * | 2011-08-31 | 2013-03-21 | Kohshin Electric Corp | Shape of magnetic core in current sensor |
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| CN208921773U (en) * | 2018-08-31 | 2019-05-31 | 绵阳市维博电子有限责任公司 | One kind being based on new-energy automobile inverter current detecting sensor |
-
2018
- 2018-08-31 CN CN201811011533.4A patent/CN108761173A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003167009A (en) * | 2001-12-03 | 2003-06-13 | Stanley Electric Co Ltd | Current detector |
| KR200356237Y1 (en) * | 2004-04-26 | 2004-07-14 | 원규식 | The Electric current Sensor Which Used Hall Device |
| US20090009280A1 (en) * | 2007-07-05 | 2009-01-08 | Denso Corporation | Magnetic core for current sensor having high magnetic saturation |
| KR20100029390A (en) * | 2008-09-08 | 2010-03-17 | 현대자동차주식회사 | Current detecting device of inverter for hev |
| JP2013054016A (en) * | 2011-08-31 | 2013-03-21 | Kohshin Electric Corp | Shape of magnetic core in current sensor |
| CN204921944U (en) * | 2015-08-19 | 2015-12-30 | 南京奥联汽车电子电器股份有限公司 | Be applied to shelves of AMT selector and go up hall linear displacement acquisition circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112327037A (en) * | 2020-11-17 | 2021-02-05 | 深圳市海浦蒙特科技有限公司 | Hall current sensor module |
| CN112327037B (en) * | 2020-11-17 | 2024-05-14 | 深圳市海浦蒙特科技有限公司 | Hall current sensor module |
| CN118091230A (en) * | 2024-04-18 | 2024-05-28 | 苏州矩阵光电有限公司 | Hall current sensor |
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