CN208921773U - 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
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- CN208921773U CN208921773U CN201821422448.2U CN201821422448U CN208921773U CN 208921773 U CN208921773 U CN 208921773U CN 201821422448 U CN201821422448 U CN 201821422448U CN 208921773 U CN208921773 U CN 208921773U
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Abstract
The utility model discloses one kind to be based on new-energy automobile inverter current detecting sensor, including being provided with two-way current detecting unit W phase and U phase in sensor, two-way current signal is detected simultaneously, magnetic circuit and measuring circuit are provided in every road W phase or U phase, 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 reasonable parts selection and circuit design, solves the problems, such as to detect high current under small size in high precision.
Description
Technical field
The utility model relates to a kind of inverter current detection sensors, and in particular to one kind is based on new-energy automobile inversion
Device current detecting sensor.
Background technique
Up to now, Chinese new-energy automobile is 77.7 ten thousand existing, 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
The highly reliable and inexpensive demand of testing 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.
Utility model content
Technical problem to be solved in the utility model is that existing Hall current sensor difficulty meets new-energy automobile inversion
The high current of device current detecting product, small size, highly reliable and inexpensive detection demand are, and it is an object of the present invention to provide a kind of be based on new energy
Source vehicle inverter current detecting sensor, solves the problem above-mentioned.
The utility model 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 phase and U phase, two-way current signal is detected simultaneously, be provided with magnetic circuit and measuring circuit in every road W phase or U phase,
The magnetic circuit includes toroidal core, and affiliated measuring circuit includes that Hall element and its periphery protection circuit, Hall element setting exist
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 electricity
Flow 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 will test
Magnetic field Φ is converted to Hall voltage VHOutput.It, can since magnetic field Φ and hall device output have good linear relationship
Pass through Hall output potential VHReflection exports tested electric current I indirectlyOSize.
The measuring circuit is in the layout of on printed board, and printed board uses four laminates.Hall device in the measuring circuit
Part can reduce product body since the device itself has been internally integrated the circuits such as signal acquisition, amplification and processing for Integrated Hall IC
Product.In order to improve product reliability, protection circuit is all devised around Hall IC, power supply and output port, is mentioned 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) is recommended to select the silicon steel band of the high trade mark, and opening is 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, printed board is carried out by the structure of Housing bottom cover and shell main casing and is fixed.
Printed board output port devises gasket, is placed in 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 placed in main casing as required.
The gasket is placed between printed board output port and main casing bottom, can reduce repeatedly plug output end
Son, impact and oscillation etc. influence product stability.
Design has product mounting hole on the main casing, and mounting hole in special metal cylinder by being embedded in shell main casing
Mode realize.It is provided with a certain size notch on the metal cylinder outer ring, is increased between shell mould-injection with this
Contact coefficient.
The utility model compared with prior art, have at least the following advantages and the utility model has the advantages that
The utility model carries out low-voltage power supply using Integrated Hall IC, can reduce small product size；Pass through the protection of design periphery
Circuit can promote Product environment reliability；Magnetic core uses silicon steel punching, is fixed, can be dropped by being molded into mode in shell
Low environment influences magnetic core performance, improves product stability；Between shell main casing and bottom cover by ultrasonic fusing mode into
Row sealing, can promote product reliability.The inspection of Hall open-loop current is realized compared to conventionally employed separation hall device and Wound core
Survey technology is compared, and the product of the utility model is with small in size, current detection range is wide, at low cost, light-weight, low in energy consumption, warm
Float the advantages such as low, stability and high reliablity, strong antijamming capability.A kind of new-energy automobile inverter current of the utility model
Detecting sensor realizes the high current under small size requirement occasion, multichannel, high-precision and detects, which also may extend to
Other current detecting occasions.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the utility model embodiment, constitutes the one of the application
Part does not constitute the restriction to the utility model embodiment.In the accompanying drawings:
Fig. 1 is the circuit diagram of the utility model measuring circuit.
Fig. 2 is ring core structure figure.
Fig. 3 is the utility model product embedded metal cylindrical section figure.
Fig. 4 is the shape assumption diagram of the utility model product.
1- toroidal core, 2- metal cylinder.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below with reference to embodiment and attached drawing,
The utility model is described in further detail, and the exemplary embodiment and its explanation of the utility model are only used for explaining this
Utility model is not intended to limit the scope of the present invention.
Embodiment one
As shown in figures 1-4, the utility model one kind is based on new-energy automobile inverter current detecting sensor, can use
In small size, high current, do not power off in the case of highly reliable, rapid survey.Current signal can be tested to two-way to detect, needle
To per all the way including magnetic circuit and measuring circuit, magnetic circuit includes toroidal core 1, and tested electric current is converted to magnetic field；Measuring circuit packet
Containing Hall element and its peripheral circuit, Hall element centered vertical is put in 1 open center of toroidal core, utilizes Hall effect original
Tested magnetic field is converted to Hall voltage output by reason.It, can the tested input current of indirect reaction by the Hall voltage of detection output
Size.
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 example 1, and J1 is the dedicated plug-in of automotive grade
Terminal, for providing power supply and output interface；T1/T2 is two-way TVS diode, is protected for power supply and output end EMC； 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,
Improve ESD protection capability；C1 is for carrying out decoupling filtering to Hall IC chip power supply VCC；C2/C3/R1/R2 is for suddenly
You are filtered in potential output.Toroidal core 1 does not embody in the position 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 outer dimension 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 the mode 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 toroidal 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 in size, it is embedded into shell main casing
Contact coefficient is small when in vivo, it is difficult to ensure that using in product reliable in 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, rapid survey new-energy automobile inverter current size, meets the inspection of new-energy automobile inverter current
Survey the market demand.
Above-described specific embodiment, to the purpose of this utility model, technical scheme and beneficial effects carried out into
One step is described in detail, it should be understood that being not used to limit the foregoing is merely specific embodiment of the present utility model
Determine the protection scope of the utility model, within the spirit and principle of the utility model, any modification for being made equally is replaced
It changes, improve, should be included within the scope of protection of this utility model.
Claims (7)
1. one kind is 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 phase and U phase, two-way current signal are detected simultaneously, be provided in every road W phase or U phase magnetic circuit and
Measuring circuit, the magnetic circuit include toroidal core (1), and the measuring circuit includes Hall element and its peripheral circuit, are 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
Magnetic core (1) open center, will test magnetic field using Hall effect principle and is converted to Hall voltage and exported, measuring circuit periphery
Setting protection circuit, guarantees 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. according to claim 2 a kind of based on new-energy automobile inverter current detecting sensor, which is characterized in that
The toroidal core (1) is moulded in inside shell main casing, and the printed board is positioned by the location hole on main casing, printed board
It occupy on Housing bottom cover and toroidal core (1), is fixed by Housing bottom cover.
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 design has mounting hole, embeds to enter on main casing by 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 arranged on metal cylinder (2) outer ring jagged.
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) uses silicon steel punching structure, presses moulding by tinertoy between toroidal core (1) punching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821422448.2U CN208921773U (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 |
|---|---|---|---|
| CN201821422448.2U CN208921773U (en) | 2018-08-31 | 2018-08-31 | One kind being based on new-energy automobile inverter current detecting sensor |
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| Publication Number | Publication Date |
|---|---|
| CN208921773U true CN208921773U (en) | 2019-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761173A (en) * | 2018-08-31 | 2018-11-06 | 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 CN201821422448.2U patent/CN208921773U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761173A (en) * | 2018-08-31 | 2018-11-06 | 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 |
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