CN109633213A - A kind of current sensor magnetism gathering rings - Google Patents
A kind of current sensor magnetism gathering rings Download PDFInfo
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- CN109633213A CN109633213A CN201811539750.0A CN201811539750A CN109633213A CN 109633213 A CN109633213 A CN 109633213A CN 201811539750 A CN201811539750 A CN 201811539750A CN 109633213 A CN109633213 A CN 109633213A
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- current sensor
- magnetism gathering
- gathering rings
- magnet ring
- single crystal
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- 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
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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
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
A kind of current sensor magnetism gathering rings, belong to current sensing techniques field.The present invention solves big, the at high cost problem of the magnetism gathering rings size in existing current sensor.The present invention includes four groups of annular magnetic rollers for being provided with air gap, four circular magnetic loop structure snd size are all the same, circular magnetic loop includes single crystal silicon material magnet ring main body and soft iron material layer, the soft iron material layer plating is located at the outside of single crystal silicon material magnet ring main body, and the width of the soft iron material layer is less than the width of single crystal silicon material magnet ring main body；Four circular magnetic loops are combined sequentially into integral structure by bonding technology from top to bottom；The gap position of four circular magnetic loops is corresponding in the integral structure.The magnetism gathering rings that the present invention is suitable as current sensor use.
Description
Technical field
The invention belongs to current sensing techniques fields.
Background technique
In recent years, as people are to the operation is stable of new-energy automobile motor, solar energy and wind power generation inverter
Property requirement be continuously improved, current sensor be widely used in new energy, intelligent transportation, Industry Control, intelligent appliance and
The measurement in the fields such as smart grid.Non-contact current sensor is mainly used for the measurement of high current, the type current sensor
Working principle are as follows: primary current generate magnetic field as collected by magnetism gathering rings, be placed in the Hall element in magnetism gathering rings to the magnetic field
It is acquired, the Hall voltage of one with primary side magnetic field equal proportion is generated, by the size for measuring the Hall voltage, so that it may realize
To the isolation detection of primary current.
Currently, the type of current sensor includes: Hall, pick-up loop and fluxgate current sensor etc..Wherein, Hall
Current sensor is low with operating power consumption, is tested current type without limitation, output voltage or electric current are believed by way of electromagnetic isolation
Number, the advantages that output accuracy height, fast response time, small temperature drift, it is widely used in above-mentioned field.
For the influence for reducing external magnetic field, in the design of Hall current sensor, overwhelming majority design is all by Hall
Element is placed on the gap position of magnetism gathering rings.Therefore, the production of magnetism gathering rings seems most important, and production efficiency directly determines
The manufacturing cost of current sensor product.
However, magnetism gathering rings used in closed-loop current sensors available on the market are mainly by the single iron core with open
It is formed with secondary coil.This kind of magnetism gathering rings are able to satisfy application when measuring DC current, but in above-mentioned current sensor
Often size is larger for magnetism gathering rings, so that the volume of current sensor is larger, heavier-weight；On the other hand, as the poly- magnetic of magnetic core
The price of ring is often higher, so that the cost of manufacture of current sensor is higher.
Summary of the invention
The present invention is to propose one to solve big, the at high cost problem of the magnetism gathering rings size in existing current sensor
Kind current sensor magnetism gathering rings.
A kind of current sensor magnetism gathering rings of the present invention, the annular magnetic roller of air gap is provided with including four groups, described
Four circular magnetic loop structure snd size are all the same, and circular magnetic loop includes single crystal silicon material magnet ring main body and soft iron material layer, described
Soft iron material layer plates the outside for being located at single crystal silicon material magnet ring main body, and the width of the soft iron material layer is less than single crystal silicon material magnetic
The width of ring main body；
Four circular magnetic loops are combined sequentially into integral structure by bonding technology from top to bottom；Four in the integral structure
The gap position of circular magnetic loop is corresponding.
Further, the rectangular opening that the air gap of annular magnetic roller opens up for the side wall in annular magnetic roller, the rectangular opening
Length run through annular magnetic roller upper/lower terminal.
Further, the width of soft iron material layer is greater than the width of the single crystal silicon material magnet ring main body of half.
Further, the range of the internal diameter of annular magnetic roller is 2.4mm to 2.6mm.
Further, the range of the outer diameter of annular magnetic roller is 7.4mm to 7.6mm.
Further, soft iron material layer with a thickness of 1.3 μm to 1.7 μm.
Further, single crystal silicon material magnet ring main body wall with a thickness of 395 μm to 405 μm.
Further, the width of annular magnetic roller air gap is 2mm.
Hall current sensor of the invention is used for electric current of the range within ± 65A, belongs to middle low power scope, so
Using circular configuration, opening number is one, when Hall element is all put into magnet ring opening air gap, passes through the magnetic of Hall element
Field is uniform magnetic field.Therefore, when designing magnet ring, magnet ring thickness and opening size should be controlled.According to Hall current sensor electricity
The shape of identified Hall element in the design of road can determine that the reasonable size of opening air gap is 2mm.Silicon-soft iron material has
Higher saturation induction density, the cost of lesser core loss and relative moderate.In addition, as IC technology and MEMS skill
Most common material in art makes magnetism gathering rings using silicon-soft iron material, can effectively reduce the size and weight of magnetism gathering rings, and
, much higher than conventional machining, it can make magnetism gathering rings that there is good consistency by control errors within 10 μm.And this hair
Bright to be made by micro fabrication, decoration structure features simple design solves the problems, such as that current sensor volume is larger, heavier-weight, has
The production cost of the reduction current sensor magnetism gathering rings of effect.
Detailed description of the invention
Fig. 1 is top view of the current sensor of the present invention with novel magnetism gathering rings；
Fig. 2 is side view of the current sensor of the present invention with novel magnetism gathering rings.
Specific embodiment
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, how to apply to the present invention whereby
Technological means solves technical problem, and the realization process for reaching relevant art effect can fully understand and implement.This Shen
Please each feature in embodiment and embodiment, can be combined with each other under the premise of not colliding, be formed by technical solution
It is within the scope of the present invention.
Specific embodiment 1: illustrating present embodiment, current sense described in present embodiment below with reference to Fig. 1 and Fig. 2
The novel magnetism gathering rings of device are provided with the annular magnetic roller of air gap including four groups, and four circular magnetic loop structure snd size are all the same,
Circular magnetic loop includes single crystal silicon material magnet ring main body and soft iron material layer, and the soft iron material layer plating is located at single crystal silicon material magnet ring
The outside of main body, the width of the soft iron material layer are less than the width of single crystal silicon material magnet ring main body；
Four circular magnetic loops are combined sequentially into integral structure by bonding technology from top to bottom；Four in the integral structure
The gap position of circular magnetic loop is corresponding.
The novel magnetism gathering rings of current sensor of the present invention, are made, decoration structure features simple design solves electricity by micro fabrication
The problem of flow sensor volume is larger, heavier-weight, can effectively reduce the production cost of current sensor magnetism gathering rings.
Specific embodiment 2: illustrating present embodiment below with reference to Fig. 2, present embodiment is to described in embodiment one
A kind of current sensor is described further with magnetism gathering rings, and the air gap of annular magnetic roller is to open up in the side wall of annular magnetic roller
Rectangular opening, the length of the rectangular opening run through the upper/lower terminal of annular magnetic roller.
Specific embodiment 3: present embodiment is to a kind of current sensor magnetism gathering rings described in embodiment one or two
It is described further, the width of soft iron material layer is greater than the width of the single crystal silicon material magnet ring main body of half.
Specific embodiment 4: present embodiment is to a kind of current sensor magnetism gathering rings described in embodiment one or two
It is described further, the range of the internal diameter of annular magnetic roller is 2.4mm to 2.6mm.
Specific embodiment 5: present embodiment is to a kind of current sensor magnetism gathering rings described in embodiment one or two
It is described further, the range of the outer diameter of annular magnetic roller is 7.4mm to 7.6mm.
Specific embodiment 6: present embodiment is to a kind of current sensor magnetism gathering rings described in embodiment one or two
Be described further, soft iron material layer with a thickness of 1.3 μm to 1.7 μm.
Specific embodiment 7: present embodiment is to a kind of current sensor magnetism gathering rings described in embodiment one or two
Be described further, single crystal silicon material magnet ring main body wall with a thickness of 395 μm to 405 μm.
Specific embodiment 8: present embodiment is to a kind of current sensor magnetism gathering rings described in embodiment one or two
It is described further, the width of annular magnetic roller air gap is 2mm.
Magnetism gathering rings of the present invention are in round structure, and opening air gap, which refers to, cuts away one in the cross-wise direction along magnetism gathering rings
Part, to form opening air gap.
The production method of magnetism gathering rings of the present invention are as follows: soft iron is deposited on monocrystalline silicon piece, it is rotten by photoetching, wet process
The micro fabrications such as erosion, dry etching, scribing produce satisfactory circular ring structure.Every four groups of annulus are superimposed, key is passed through
It closes technique and obtains required novel magnetism gathering rings.
Although disclosed herein embodiment it is as above, the content is only to facilitate understanding the present invention and adopting
Embodiment is not intended to limit the invention.Any those skilled in the art to which this invention pertains are not departing from this
Under the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But scope of patent protection of the invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (8)
1. a kind of current sensor magnetism gathering rings, which is characterized in that it is provided with the annular magnetic roller of air gap including four groups, described four
Circular magnetic loop structure snd size are all the same, and circular magnetic loop includes single crystal silicon material magnet ring main body and soft iron material layer, the soft iron
Material layer plates the outside for being located at single crystal silicon material magnet ring main body, and the width of the soft iron material layer is less than single crystal silicon material magnet ring master
The width of body；
Four circular magnetic loops are combined sequentially into integral structure by bonding technology from top to bottom；Four circles in the integral structure
The gap position of magnet ring is corresponding.
2. a kind of current sensor magnetism gathering rings according to claim 1, which is characterized in that the air gap of annular magnetic roller be
The rectangular opening that the side wall of annular magnetic roller opens up, the length of the rectangular opening run through the upper/lower terminal of annular magnetic roller.
3. a kind of current sensor magnetism gathering rings according to claim 1 or claim 2, which is characterized in that the width of soft iron material layer
Greater than the width of the single crystal silicon material magnet ring main body of half.
4. a kind of current sensor magnetism gathering rings according to claim 1 or claim 2, which is characterized in that the internal diameter of annular magnetic roller
Range be 2.4mm to 2.6mm.
5. a kind of current sensor magnetism gathering rings according to claim 1 or claim 2, which is characterized in that the outer diameter of annular magnetic roller
Range be 7.4mm to 7.6mm.
6. a kind of current sensor magnetism gathering rings according to claim 1 or claim 2, which is characterized in that the thickness of soft iron material layer
It is 1.3 μm to 1.7 μm.
7. a kind of current sensor magnetism gathering rings according to claim 1 or claim 2, which is characterized in that single crystal silicon material magnet ring master
Body sidewall with a thickness of 395 μm to 405 μm.
8. a kind of current sensor magnetism gathering rings according to claim 1 or claim 2, which is characterized in that annular magnetic roller air gap
Width is 2mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811539750.0A CN109633213B (en) | 2018-12-14 | 2018-12-14 | Magnetic gathering ring for current sensor |
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| CN109633213B CN109633213B (en) | 2021-05-18 |
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| CN204143031U (en) * | 2014-09-22 | 2015-02-04 | 安徽昌硕光电子科技有限公司 | A kind of two magnet ring inching gear module |
| CN105355385A (en) * | 2015-11-06 | 2016-02-24 | 国网山东省电力公司淄博供电公司 | Low-electromagnetic-noise iron core reactor |
| EP3246926A1 (en) * | 2016-05-20 | 2017-11-22 | Melexis Technologies SA | Magnetic flux concentrator structure and method for manufacturing the same |
| CN108364763A (en) * | 2018-01-23 | 2018-08-03 | 深圳市力高科技有限公司 | A kind of three-phase conducting wire shares the current-limiting reactor of magnet ring |
-
2018
- 2018-12-14 CN CN201811539750.0A patent/CN109633213B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1731861A (en) * | 1929-04-05 | 1929-10-15 | Gen Electric | Magnetic core |
| US1880805A (en) * | 1932-03-16 | 1932-10-04 | Bell Telephone Labor Inc | Inductive device |
| CN101192645A (en) * | 2006-11-24 | 2008-06-04 | 中国科学院物理研究所 | Metal multiple layer film hall device and method for making same |
| CN101606071A (en) * | 2007-03-14 | 2009-12-16 | 株式会社田村制作所 | Current detector |
| CN101363876A (en) * | 2007-08-10 | 2009-02-11 | 台达电子工业股份有限公司 | Current inductor and iron core group thereof |
| CN102360721A (en) * | 2011-06-03 | 2012-02-22 | 北京英博电气股份有限公司 | Assembled single-phase reactor |
| CN203242458U (en) * | 2013-05-27 | 2013-10-16 | 深圳市英大科特技术有限公司 | Electric reactor for electric vehicle |
| CN203850087U (en) * | 2014-03-16 | 2014-09-24 | 深圳市雅玛西电子有限公司 | Highly efficient and energy-saving PFC inductor with long service life |
| CN204143031U (en) * | 2014-09-22 | 2015-02-04 | 安徽昌硕光电子科技有限公司 | A kind of two magnet ring inching gear module |
| CN105355385A (en) * | 2015-11-06 | 2016-02-24 | 国网山东省电力公司淄博供电公司 | Low-electromagnetic-noise iron core reactor |
| EP3246926A1 (en) * | 2016-05-20 | 2017-11-22 | Melexis Technologies SA | Magnetic flux concentrator structure and method for manufacturing the same |
| CN108364763A (en) * | 2018-01-23 | 2018-08-03 | 深圳市力高科技有限公司 | A kind of three-phase conducting wire shares the current-limiting reactor of magnet ring |
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