CN107807265A - A kind of current sensor magnetic circuit iron core - Google Patents
A kind of current sensor magnetic circuit iron core Download PDFInfo
- Publication number
- CN107807265A CN107807265A CN201711184364.XA CN201711184364A CN107807265A CN 107807265 A CN107807265 A CN 107807265A CN 201711184364 A CN201711184364 A CN 201711184364A CN 107807265 A CN107807265 A CN 107807265A
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- branch road
- road block
- block
- lamination
- piecemeal
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000003475 lamination Methods 0.000 claims abstract description 118
- 239000002184 metal Substances 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 125000001967 indiganyl group Chemical group [H][In]([H])[*] 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 235000021186 dishes Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Classifications
-
- 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
Abstract
The invention discloses a kind of current sensor magnetic circuit iron core, the magnetic circuit iron core includes enclosing the first lamination and the second lamination formed with center through hole, and the cross section profile of the center through hole is rectangular；The empty avoiding mouth connected with center through hole is reserved between first lamination and the second lamination；The tie point block, first end branch road block, the first lamination, the second lamination, the 3rd end branch road block, the 4th branch road block are enclosed successively, and formed with the upper through-hole passed through for Magnetic Sensor, the upper through-hole is connected by empty avoiding mouth with center through hole.The present invention have the advantages that structure design is simple, easy to process, number of assembling steps less, beneficial to production efficiency raising, can effectively suppress the air gap magnetic leakage of magnetic circuit.
Description
Technical field
The present invention relates to current sensor, more particularly, to a kind of current sensor magnetic circuit iron core.
Background technology
In recent years, with people to new-energy automobile motor, solar energy and wind power generation inverter to working stability
Property desired continuous improvement, non-contact current sensor is widely used in the measurement of high current.The work of the current sensor
It is as principle：After primary side (to be measured) electric current produces magnetic field in magnetic circuit, the Magnetic Sensor in magnetic air gap will be examined to magnetic field
Survey, after signal amplifies and adjusts, the compensation circuit of output compensation electric current driving magnetic circuit, to offset the magnetic sensed by primary current
.At present, the type of current sensor includes：Hall, pick-up loop and fluxgate current sensor etc..Wherein, fluxgate electricity
Flow sensor with characteristics such as high sensitivity, temperature stability and low drifts because being widely used in a variety of applications.
For reduce external magnetic field influence, in fluxgate current sensor magnetic Circuit Design, it is most design be all by
Magnetic Sensor (mostly being made with high-permeability material) is placed on inside magnetic core, therefore, the structure of magnetic core is particularly important, and magnetic
The processing efficiency of core directly determines the production cost of current sensor product.
At present, conventional current sensor core structure mainly uses the following two kinds structure：One is Publication No.
CN101925825A application for a patent for invention is disclosed to be designed, including two semi-surrounding branch combinations parallelepiped structures, and
The collateral road of magnetic circuit includes the chamber portion surrounded by multiple folding sidewalls；The second is notification number is US6388549B1 United States Patent (USP)s
Disclosed design, includes the parallelepiped structure of two U-shaped magnetic circuit combinations, and to reduce magnetic leakage, uses a vertical bar shape more
Magnetic core is placed on the U-shaped magnetic circuit junction of above-mentioned two.However, above two designs, otherwise it is exactly core structure complex designing, no
Beneficial to production, otherwise it is exactly that core structure design part is more, is unfavorable for installing, the production to current sensor has certain shadow
Ring.
Therefore, it is necessary to study the magnetic for current sensor that a structure design is more succinct, production cost is lower
Road iron core.
The content of the invention
It is used for current sensor it is an object of the invention to provide a kind of structure design is more succinct, production cost is lower
Magnetic circuit iron core.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of current sensor magnetic circuit iron core, particularly, including enclose the first lamination formed with center through hole and
Second lamination, the cross section profile of the center through hole are rectangular；It is reserved between first lamination and the second lamination and center
The empty avoiding mouth of through hole connection；First lamination extends formed with orthogonal tie point block and first towards empty avoiding mouth side
End branch road block；The tie point block extends perpendicular to the thickness direction arrangement of the first lamination and past second lamination side；
One end of the first end branch road block is connected with tie point block, and the other end is connected with the first lamination；The second lamination court
Empty avoiding mouth side extends formed with orthogonal 4th branch road block and the 3rd end branch road block；4th branch road block is perpendicular to
The thickness direction arrangement of two laminations simultaneously extends toward the first lamination side, and the 4th branch road block overlaps mutually simultaneously with tie point block
Away from the second lamination；One end of 3rd end branch road block is connected with the 4th branch road block, and the other end is connected with the second lamination；
The tie point block, first end branch road block, the first lamination, the second lamination, the 3rd end branch road block, the 4th branch road block according to
Secondary to enclose, formed with the upper through-hole passed through for Magnetic Sensor, the upper through-hole is connected by empty avoiding mouth with center through hole.
Above-mentioned 4th branch road block overlaps mutually with tie point block and refers to the 4th branch road block and first away from the second lamination
Branch road block is compared, and the 4th branch road block is further from the second lamination.
First lamination and the second lamination enclose the center through hole formed, i.e. central opening, are led available for for primary
Body passes through.And the upper through-hole connected by empty avoiding mouth with center through hole, passed through available for for Magnetic Sensor.Using this magnetic circuit
When iron core assembles current sensor, only the first lamination and the second lamination need to be stacked splicing, you can formation supplies current sense
The magnetic structure that device uses, assembling product are more convenient.
In the first lamination and the second lamination, the vertical range of tie point block to the second branch road block is preferably smaller than
The vertical range of two branch road blocks to the 3rd branch road block, the vertical range of the 4th branch road block to the 5th branch road block are preferably smaller than the 5th
Road block to the 6th branch road block vertical range.So it is ensured that the first lamination and the second lamination be stacked splicing after shape
Into center through hole area can be more than upper through-hole area, so that primary conductor, Magnetic Sensor respectively penetrate.
First lamination and the second lamination can be folded by the sheet metal in vertical bar shape to be formed, and is so more conducive to this magnetic circuit
The processing of iron core.The length of sheet metal can be in the range of 50~65mm, and the width of sheet metal can be in the range of 2~4mm, and metal
The thickness of piece then can in the range of 0.45~0.55mm, using the first lamination, the second lamination made of such sheet metal,
The use demand of current most of current sensor can be met.
When folding the first lamination, the second lamination using the sheet metal of vertical bar shape, to reduce the former material needed for folding
The design that material, the first lamination and the second lamination are preferably more simplified using structure, it is specific as follows：
First lamination include be sequentially connected tie point block, first end branch road block, the second branch road block, the second end
Portion's branch road block and the 3rd branch road block, wherein, tie point block, the second branch road block and the 3rd branch road block are parallel to each other；The first end
One end of portion's branch road block is vertically connected with tie point block, and the other end is vertically connected with the second branch road block；The second end branch road
One end of block is vertically connected with the second branch road block, and the other end is vertically connected with the 3rd branch road block, and first end branch road block and
Two end branch road blocks are coplanar；
The second iron lamination include be sequentially connected the 3rd branch road block, the 3rd end branch road block, the 4th branch road block, the 4th
End branch road block and the 6th branch road block；3rd branch road block, the 4th branch road block and the 6th branch road block are parallel to each other, the 6th branch road block
Splicing is stacked with the 3rd branch road block and close to the 5th branch road block；One end phase vertical with the 3rd branch road block of 3rd end branch road block
Even, the other end is vertically connected with the 4th branch road block；One end of 4th end branch road block is vertically connected with the 4th branch road block, another
End is vertically connected with the 6th branch road block, and the 3rd end branch road block and the 4th end branch road block are coplanar.
Above-mentioned 6th branch road block and the 3rd branch road block are stacked splicing and refer to the 6th branch road block and the close to the 5th branch road block
Three branch road blocks are compared, and the 6th branch road block is closer to the 5th branch road block.
To ensure that the first lamination and the second lamination are stacked splicing and can enclose to form center through hole and upper through-hole, first
After lamination and the second lamination enclose, the second branch road block is preferably parallel to each other and coplanar with the 5th branch road block, meanwhile, first
The vertical range of road block to the second branch road block is less than the vertical range of the 4th branch road block to the 5th branch road block, and difference △ h be present,
The vertical range of second branch road block to the 3rd branch road block is more than the vertical range of the 5th branch road block to the 6th branch road block, and in the presence of poor
Value △ l, difference △ h=difference △ l, and △ h, △ the l value in the range of 0.45~0.55mm.
The vertical range of above-mentioned tie point block to the second branch road block it is vertical with the 4th branch road block to the 5th branch road block away from
Refer to from difference △ h be present because the vertical range of tie point block to the second branch road block is less than the 4th branch road block to the 5th branch road
The vertical range of block, therefore, the numerical value of two vertical ranges certainly exist the difference of numerical value, and the absolute value of the difference of the numerical value is difference
△h。
The vertical range of above-mentioned second branch road block to the 3rd branch road block it is vertical with the 5th branch road block to the 6th branch road block away from
Refer to from difference △ l be present because the vertical range of the second branch road block to the 3rd branch road block is more than the 5th branch road block to the 6th branch road
The vertical range of block, therefore, the numerical value of two vertical ranges certainly exist the difference of numerical value, and the absolute value of the difference of the numerical value is difference
△l。
After first lamination and the second lamination are stacked splicing, the outline of the magnetic structure of gained is rectangle, magnetic circuit knot
Include the upper through-hole for passing through center through hole for primary conductor, being passed through for Magnetic Sensor in structure.To ensure that this magnetic circuit iron core can
Effectively suppress the air gap leakage field of magnetic circuit, in the first lamination, the vertical range of tie point block to the second branch road block preferably exists
12%~18%H1In the range of, H1It is the total height of the first lamination；In the second lamination, the 4th branch road block to the 5th branch road
The vertical range of block is preferably in 12%~18%H2In the range of, H2It is the total height of the second lamination；Meanwhile tie point block,
The length of four branch road blocks preferably in the range of 70%~85%D, the second branch road block, the length of the 5th branch road block preferably 40%~
In the range of 45%D, the 3rd branch road block, the length of the 6th branch road block are preferably in the range of 60%~70%D.
Above-mentioned D is the width that the first lamination and the second lamination are stacked the magnetic structure obtained by splicing.
In above-mentioned design, the second branch road block, the 5th branch road block can also use double-decker, i.e. the second branch road block includes phase
Folded second the first piecemeal of branch road and second the second piecemeal of branch road, the piecemeal of the second branch road first and first end branch road block phase
Even, the piecemeal of the second branch road second is connected with the second end branch road piecemeal；5th branch road block includes the 3rd branch road piecemeal being stacked
With the 4th branch road piecemeal, the 3rd branch road piecemeal is connected with the 3rd end branch road block, the 4th branch road piecemeal and the 4th end branch
Road piecemeal is connected.And remaining branch road block, if tie point block, the 3rd branch road block, the 4th branch road block and the 6th branch road block after
It is continuous to use single layer structure.
The invention has the advantages that：
1) design of this magnetic circuit core structure is simple, and easy to process, 30% can be reduced by producing the materials'use of this magnetic circuit iron core
~40%, production cost reduces by 30%~40%；
2) this magnetic circuit iron core is directly stacked and is spliced by the first lamination and the second lamination, and number of assembling steps is less, in
Assembling, moreover, this magnetic circuit iron core assembles bilateral lamination due to only needing, very simple is assembled, is more beneficial for the later stage
Automation, beneficial to the raising of production efficiency
3) this magnetic circuit iron core can form preferable enclosed construction, than existing magnetic circuit iron core air gap magnetic leakage reduce 7%~
10%, it can effectively suppress the air gap magnetic leakage of magnetic circuit.
Brief description of the drawings
Fig. 1 is the schematic diagram of the first lamination in the embodiment of the present invention；
Fig. 2 is the schematic diagram of the second lamination in the embodiment of the present invention；
Fig. 3 is the schematic diagram of magnetic circuit iron core in the embodiment of the present invention.
Description of reference numerals：The laminations of 1- first；The laminations of 2- second；3- tie point blocks；4- first end branch road blocks；
5- the second branch road blocks；6- the second end branch road blocks；The branch road blocks of 7- the 3rd；8- the first piecemeals of the second branch road；The second branch roads of 9- second
Piecemeal；The branch road blocks of 10- the 4th；The end branch road blocks of 11- the 3rd；The branch road blocks of 12- the 5th；The end branch road blocks of 13- the 4th；14- the 6th
Branch road block；The first piecemeals of branch road of 15- the 5th；The second piecemeals of branch road of 16- the 5th；17- center through hole；18- upper through-holes；19- is kept away
Eat dishes without rice or wine.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
The magnetic circuit iron core of the present embodiment, it is made up of the first lamination 1 and the second lamination 2.In the present embodiment, the first iron core
The lamination 2 of piece 1 and second is folded by the sheet metal in vertical bar shape and formed, and the length of the sheet metal is 55.5mm, width is
3mm, thickness 0.5mm.The material of sheet metal is permalloy (1J85).
As shown in figure 1, in the present embodiment, the first lamination 1 is by the tie point block 3, the first end branch road that are sequentially connected
Block 4, the second branch road block 5, the second end branch road block 6 and the 3rd branch road block 7 are formed, wherein, the second branch road block 5 is tied using double-deck
Structure, i.e. the second branch road block 5 include second branch road the first piecemeal 8 being stacked and second the second piecemeal of branch road 9, the second branch road first divide
Block 8 is connected with first end branch road block 4, and second the second piecemeal of branch road 9 is connected with the second end branch road piecemeal.
Form, therefore, tie point block 3 and first end branch road block 4 because the first lamination 1 is folded by a sheet metal
Link position be rounding off, the link position of first end branch road block 4 and second the first piecemeal of branch road 8 is rounding off,
The link position of second branch road the first piecemeal 8 and second the second piecemeal of branch road 9 is rounding off, second the second piecemeal of branch road 9 with
The link position of the second end branch road block 6 is rounding off, and the link position of the second end branch road block 6 and the 3rd branch road block 7 is
Rounding off.
In the present embodiment, tie point block 3, the second branch road block 5 and the 3rd branch road block 7 are parallel to each other.First end
One end of branch road block 4 is vertically connected with tie point block 3, and the other end is vertically connected with the second branch road block 5.The second end branch road block
6 one end is vertically connected with the second branch road block 5, and the other end is vertically connected with the 3rd branch road block 7, and first end branch road block 4 with
The second end branch road block 6 is coplanar.Such structure can ensure the first lamination 1 and after the second lamination 2 is stacked assembling, gained
Center through hole and upper through-hole profile it is rectangular, match with the shape of primary conductor and Magnetic Sensor.
In the present embodiment, the vertical range of the branch road block 5 of tie point block 3 to the second is less than the second branch road block 5 to the 3rd
The vertical range of road block 7, and the most short vertical range of the first piecemeal of branch road 8 of tie point block 3 to the second is 15%II1mm, II1
For the total height of the first lamination 1.The length L of tie point block 31For 75%Dmm, the length L of the second branch road block 52For 40%
Dmm, the length L of the 3rd branch road block 73For 60%Dmm.Above-mentioned D is that the first lamination 1 and the second lamination 2 are stacked splicing gained
Magnetic structure width.
As shown in Fig. 2 in the present embodiment, the second lamination 2 is by the 4th branch road block 10, the 3rd end branch road that are sequentially connected
Block 11, the 5th branch road block 12, the 4th end branch road block 13 and the 6th branch road block 14 are formed, wherein, the 5th branch road block 12 is using double
Rotating fields, i.e. the 5th branch road block 12 include the 5th branch road the first piecemeal 15 and the 5th the second piecemeal of branch road 16 that are stacked, the 5th
The first piecemeal of road 15 is connected with the 3rd end branch road block 11, and the 5th the second piecemeal of branch road 16 is connected with the second end branch road piecemeal.
Form, therefore, the 4th branch road block 10 and the 3rd end branch road block because the second lamination 2 is folded by a sheet metal
11 link position is rounding off, and the link position of the 3rd end branch road block 11 and the 5th the first piecemeal of branch road 15 is round and smooth mistake
Cross, the link position of the 5th branch road the first piecemeal 15 and the 5th the second piecemeal of branch road 16 is rounding off, and the 5th branch road second divides
The link position of the end branch road block 13 of block 16 and the 4th is the company of rounding off, the 4th end branch road block 13 and the 6th branch road block 14
It is rounding off to connect position.
In the present embodiment, the 4th branch road block 10, the 5th branch road block 12 and the 6th branch road block 14 are parallel to each other.3rd end
One end of portion's branch road block 11 is vertically connected with the 4th branch road block 10, and the other end is vertically connected with the 5th branch road block 12.4th end
One end of branch road block 13 is vertically connected with the 5th branch road block 12, and the other end is vertically connected with the 6th branch road block 14, and the 3rd end
Branch road block 11 and the 4th end branch road block 13 are coplanar.Such structure can ensure that the second lamination 2 is stacked with the first lamination 1
After assembling, the center through hole of gained and the profile of upper through-hole are rectangular, match with the shape of primary conductor and Magnetic Sensor.
In the present embodiment, the vertical range of the branch road block 12 of the 4th branch road block 10 to the 5th is less than the 5th branch road block 12 to the 6th
The vertical range of branch road block 14, and the most short vertical range of the first piecemeal of branch road 15 of the 4th branch road block 10 to the 5th is 15%H2+
5.5mm, H2For the total height of the second lamination 2.The length L of 4th branch road block 104For 75%Dmm, the length of the 5th branch road block 12
L5For 40%Dmm, the length L of the 6th branch road block 146For 60%Dmm.Above-mentioned D is that the second lamination 2 and the second lamination 2 are stacked
Splice the width of the magnetic structure of gained.
In the present embodiment, the height H of the first lamination 11With the height H of the second lamination 22It is equal, therefore, first
The most short vertical range of the branch road block 5 of road block 3 to the second undoubtedly can be less than the branch road block 12 of the 4th branch road block 10 to the 5th it is vertical away from
From, and difference △ h=5.5mm be present, meanwhile, the vertical range of the branch road block 7 of the second branch road block 5 to the 3rd can be more than the 5th branch road
The vertical range of the branch road block 14 of block 12 to the 6th, and difference △ l=5.5mm be present.
As illustrated, in the present embodiment, after the first lamination 1 and the second lamination 2 are stacked splicing, the 4th branch road block 10 is folded
It is connected on tie point block 3, the outer wall of the inwall and tie point block 3 of the 4th branch road block 10 fits.3rd branch road block 7 splices
On the 6th branch road block 14, the outer wall of the inwall and the 6th branch road block 14 of the 3rd branch road block 7 fits.Inwall mentioned here is
Refer to wall of the branch road block close to center through hole side, outer wall refers to wall of the branch road block away from center through hole side.Meanwhile second
Branch road block 5 is parallel to each other and coplanar with the 5th branch road block 12.
After first lamination 1 and the second lamination 2 are stacked splicing, the first lamination 1 and the second lamination 2 enclose formed with
Center through hole 17 and upper through-hole 18, wherein, center through hole 17 is by the second branch road block 5, the second end branch road block 6, the 3rd branch road
Block 7, the 6th branch road block 14, the 4th end branch road block 13 are enclosed with the 5th branch road block 12 and formed, the cross section profile of center through hole 17
It is rectangular；Upper through-hole 18 is by tie point block 3, first end branch road block 4, the second branch road block 5, the 5th branch road block the 12, the 3rd
End branch road block 11, the 4th branch road block 10 are enclosed and formed, and the cross sectional shape of upper through-hole 18 is equally rectangular, and upper through-hole 18
Area of section be less than center through hole 17 area of section.
Kept away as shown in figure 3, being also reserved between the second branch road block 5 and the 5th branch road block 12 with what center through hole 17 connected
Eat dishes without rice or wine 19, center through hole 17 is connected with upper through-hole 18 by the empty avoiding mouth 19.In the first lamination 1, the He of tie point block 3
First end branch road block 4 extends to be formed toward the side of empty avoiding mouth 19, and tie point block 3 and first end branch road block 4 mutually hang down
Directly, and tie point block 3 is perpendicular to the thickness direction arrangement of the first lamination 1 and extended toward the side of the second lamination 2；
In two laminations 2, the 4th branch road block 10 and the 3rd end branch road block 11 extend to be formed toward the side of empty avoiding mouth 19, the 4th branch road
The end branch road block 11 of block 10 and the 3rd is mutually perpendicular to, and the 4th branch road block 10 is perpendicular to the thickness direction cloth of the second lamination 2
Put and extend toward the side of the first lamination 1.
What this specification was enumerated is only better embodiment of the invention, all institutes under the operation principle and thinking of the present invention
The equivalent technologies conversion done, is accordingly to be regarded as protection scope of the present invention.
Claims (8)
1. a kind of current sensor magnetic circuit iron core, it is characterized in that：Including enclose the first lamination formed with center through hole and
Second lamination, the cross section profile of the center through hole are rectangular；It is reserved between first lamination and the second lamination with
Entreat the empty avoiding mouth of through hole connection；First lamination extend towards empty avoiding mouth side formed with orthogonal tie point block and
First end branch road block；Thickness direction arrangement and past second lamination side of the tie point block perpendicular to the first lamination
Extension；
One end of the first end branch road block is connected with tie point block, and the other end is connected with the first lamination；Described
Two laminations extend formed with orthogonal 4th branch road block and the 3rd end branch road block towards empty avoiding mouth side；Described 4th
Road block extends perpendicular to the thickness direction arrangement of the second lamination and past first lamination side, the 4th branch road block and first
Branch road block overlaps mutually and away from the second lamination；One end of 3rd end branch road block is connected with the 4th branch road block, the other end
It is connected with the second lamination；The tie point block, first end branch road block, the first lamination, the second lamination, the 3rd end
Branch road block, the 4th branch road block enclose successively, and formed with the upper through-hole passed through for Magnetic Sensor, the upper through-hole passes through empty avoiding
Mouth connects with center through hole.
2. current sensor according to claim 1 magnetic circuit iron core, it is characterized in that：The tie point block is to second
The vertical range of road block is less than the vertical range of the second branch road block to the 3rd branch road block；The 4th branch road block to the 5th branch road block
Vertical range be less than the 5th branch road block to the 6th branch road block vertical range.
3. current sensor according to claim 1 or 2 magnetic circuit iron core, it is characterized in that：First lamination and institute
The second lamination is stated to form by the sheet metal folding in vertical bar shape.
4. current sensor according to claim 3 magnetic circuit iron core, it is characterized in that：The length of the sheet metal 50~
In the range of 65mm, the width of sheet metal is in the range of 2~4mm, and the thickness of sheet metal is in the range of 0.45~0.55mm.
5. current sensor according to claim 1 or 2 magnetic circuit iron core, it is characterized in that：First lamination includes
Tie point block, first end branch road block, the second branch road block, the second end branch road block and the 3rd branch road block being sequentially connected,；Institute
Tie point block, the second branch road block and the 3rd branch road block is stated to be parallel to each other；One end of the first end branch road block with first
Road block is vertically connected, and the other end is vertically connected with the second branch road block；One end of the second end branch road block and the second branch road block
It is vertically connected, the other end is vertically connected with the 3rd branch road block, and first end branch road block and the second end branch road block are coplanar；
The second iron lamination include be sequentially connected the 3rd branch road block, the 3rd end branch road block, the 4th branch road block, the 4th end
Portion's branch road block and the 6th branch road block；3rd branch road block, the 4th branch road block and the 6th branch road block are parallel to each other, the 6th branch road block
Splicing is stacked with the 3rd branch road block and close to the 5th branch road block；One end of 3rd end branch road block is vertical with the 3rd branch road block
It is connected, the other end is vertically connected with the 4th branch road block；One end of 4th end branch road block is vertically connected with the 4th branch road block,
The other end is vertically connected with the 6th branch road block, and the 3rd end branch road block and the 4th end branch road block are coplanar.
6. current sensor according to claim 1 magnetic circuit iron core, it is characterized in that：First lamination and the second lamination
After enclosing, the second branch road block is parallel to each other and coplanar with the 5th branch road block；The tie point block is to the second branch road
The vertical range of block is less than the vertical range of the 4th branch road block to the 5th branch road block, and difference △ h be present；The second branch road block
Vertical range to the 3rd branch road block is more than the vertical range of the 5th branch road block to the 6th branch road block, and difference △ l be present；Difference
△ h=difference △ l, and △ h, △ the l value in the range of 0.45~0.55mm.
7. the current sensor magnetic circuit iron core according to claim 1 or 6, it is characterized in that：It is described in the first lamination
Tie point block to the second branch road block vertical range in 12%~18%H1In the range of, H1It is the total height of the first lamination；
In second lamination, the vertical range of the 4th branch road block to the 5th branch road block is in 12%~18%H2In the range of, H2It is second
The total height of lamination；The length of the tie point block and the 4th branch road block is in the range of 70%~85%D；Described second
The length of road block and the 5th branch road block is in the range of 40%~45%D；The length of the 3rd branch road block and the 6th branch road block exists
In the range of 60%~70%D；Above-mentioned D is the width that the first lamination and the second lamination are stacked the magnetic structure obtained by splicing.
8. current sensor according to claim 1 or 2 magnetic circuit iron core, it is characterized in that：The second branch road block includes
Second the first piecemeal of branch road and second the second piecemeal of branch road being stacked, the piecemeal of the second branch road first and first end branch road block
It is connected, the piecemeal of the second branch road second is connected with the second end branch road piecemeal；The 5th branch road block includes the 3rd be stacked
Branch road piecemeal and the 4th branch road piecemeal, the 3rd branch road piecemeal are connected with the 3rd end branch road block, the 4th branch road piecemeal
It is connected with the 4th end branch road piecemeal.
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| CN109730770A (en) * | 2018-12-25 | 2019-05-10 | 大博医疗科技股份有限公司 | Method, magnetic field receiving unit, electromagnetic tracking system and the purposes for reducing magnetic field receiving unit volume, measuring rate of change of magnetic |
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