CN102004179A - Magnetic induction current sensor for electric vehicle controller - Google Patents
Magnetic induction current sensor for electric vehicle controller Download PDFInfo
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- CN102004179A CN102004179A CN2009100703063A CN200910070306A CN102004179A CN 102004179 A CN102004179 A CN 102004179A CN 2009100703063 A CN2009100703063 A CN 2009100703063A CN 200910070306 A CN200910070306 A CN 200910070306A CN 102004179 A CN102004179 A CN 102004179A
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Abstract
The invention relates to a magnetic induction current sensor for an electric vehicle controller, wherein a closed magnetic circuit is formed by a magnetic sensor, at least two magnetic ring sections are comprised, the magnetic sensor is arranged in a magnetic gap between the two magnetic ring sections, and an external lead wire passes through the closed magnetic circuit formed by the magnetic ring sections and the magnetic sensor. The invention provides the magnetic induction current sensor, which has the advantages of lower material cost, lower manufacturing requirements, better seismic resistance, better linearity and higher precision, and is more convenient to install and easier to regulate.
Description
Technical field:
The present invention relates to a kind of current sensor, relate to a kind of induced field current sensor that is used for electric vehicle controller specifically.
Background technology:
At present, electric vehicle on the market adopts the induced field current sensor to measure the interior big electric current of lead, as shown in Figure 1: tested current in wire passes the magnet ring that has an opening, the linear Hall chip places in the magnetic gap of magnet ring, magnetic induction density linear increase that Hall chip requires magnet ring to produce with the increase of the tested electric current that passes magnet ring, this requires the magnetic permeability of magnet ring very low, be about about ten times of air permeability, so magnet ring generally adopts the very low ferrocart core material of magnetic permeability of specific customization.The magnet ring properties of materials is very crisp, and magnetic permeability is very low; After the die sinking of magnet ring magnetic gap is tailor-made, fixed size; Vibration strength is poor, and is fragile in transportation and the assembling process.If adopt higher common iron powder core or the Ferrite Material of magnetic permeability, need open bigger magnetic gap, like this because the magnetic flux edge effect will cause the linearity of current sensor to descend, to the bigger influence of accuracy generation of current detecting.
Up to the present yet there are no on the market material cost lower, make to require lower, vibration strength good, easy for installation, be easy to adjust, the linearity is better, precision is higher induced field current sensor.
Summary of the invention:
The present invention is directed to these problems propose a kind of material cost lower, make to require lower, vibration strength good, easy for installation, be easy to adjust, the linearity is better, precision is higher induced field current sensor.
The present invention is for solving the problems of the technologies described above the employing following proposal: the induced field current sensor that is used for electric vehicle controller of the present invention, form closed magnetic circuit by ferrite bead section, Magnetic Sensor, described magnet ring section has two at least, described Magnetic Sensor is arranged in the magnetic gap that forms between the described magnet ring section, and described outer lead passes the closed magnetic circuit of magnet ring section and Magnetic Sensor composition.
Technical scheme of the present invention can also comprise: the xsect of described magnet ring section is one or more the combination in rectangle, circle, ellipse, the semicircle; Described closed magnetic circuit be shaped as one or more combination in circle, ellipse, rectangle, rhombus, the triangle; Described Magnetic Sensor is the Hall-type Magnetic Sensor; The type of described Hall-type Magnetic Sensor is a linear hall element; The range of described magnetic sense current sensor is-400A～+ 400A; Described magnet ring section closed magnetic circuit is circular, and when xsect was rectangle, internal diameter was 14～23mm; External diameter is 25～37mm; Thickness is 6～9mm; The every side width of magnetic gap of described Hall-type Magnetic Sensor both sides is 2～3mm; The magnetic gap width of the non-magnetic sensor side in the described two magnet ring sections is 6～9mm; The model of described linear Hall element is 495B.
Closed magnetic circuit can be responded to by the electric current in the lead in it, and Magnetic Sensor is measured the strength of current in the lead in the enclosed region by the magnetic induction density that detects in the magnetic gap.Because the magnet ring section has two at least, promptly adopts distributed magnetic gap, compares with concentrated magnetic gap, distributed magnetic gap has reduced the influence of the magnetic gap edge effect of magnet ring, so can select the magnetic material that magnetic permeability is higher, cost is lower, hardness is higher, not easily broken; The magnetic gap width-adjustable of magnet ring is whole, makes transducer range adjustable within the specific limits; Magnet ring is installed more convenient; Sensor accuracy is higher.
Satisfying under the linear condition that requires, all can place Magnetic Sensor in the magnetic gap arbitrarily.With respect to single magnetic gap, the single magnetic gap size of distributed magnetic gap is little, so magnetic flux edge effect influence is little, and the linearity is higher relatively; And total magnetic gap size of distributed magnetic gap is suitable with concentrated magnetic gap, makes its magnetic resistance equal the magnetic resistance of the magnet ring of single magnetic gap, and the range of current detecting can be adjustable within the specific limits with the width of magnetic gap.In principle, guaranteeing under the constant condition of total magnetic gap width, the magnetic gap of placing Magnetic Sensor is more little, its edge effect is more little, the linearity of current detecting and accuracy are high more, but because Magnetic Sensor generally must place magnetic centre of gap, consider installation, the magnetic gap size is also unsuitable too small, satisfies to detect to require to get final product.Under the constant condition of the magnetic gap width that guarantees the Magnetic Sensor side, by regulating the size of another magnetic gap, range that within the specific limits can the fine tuning Hall current sensor.This induced field current sensor that is used for electric vehicle controller structurally can also cushion extraneous moment of torsion, and vibration strength is good, and is not easily broken, can arbitrarily adjust during installation, sticks with glue after adjustment finishes to be connected on the measurement mechanism again.
The invention has the beneficial effects as follows: when guaranteeing low magnetic permeability, magnetization curve has good linearty, has well solved the contradiction between the magnetic permeability and the linearity; Adopt common ferrite bead simultaneously, buying difficulty and cost reduce, and resistance to vibration is good, and spoilage is low.
Description of drawings:
Fig. 1 is the structural representation of current sensor in the prior art;
Fig. 2 is the structural representation of first embodiment of the present invention;
Fig. 3 is the structural representation of second embodiment of the present invention;
Fig. 4 is the structural representation of the 3rd embodiment of the present invention.
Embodiment:
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
As Fig. 1-4:1 is the magnet ring section, the 2nd, and magnetic gap, the 3rd, outer lead, the 4th, Magnetic Sensor.
The present invention solves the problems of the technologies described above and adopts following proposal to be: the induced field current sensor that is used for electric vehicle controller of the present invention, form closed magnetic circuit by ferrite bead section 1, Magnetic Sensor 4, described magnet ring section 1 has two at least, described Magnetic Sensor 4 is arranged in the magnetic gap 2 that forms between the described magnet ring section 1, and described outer lead 3 passes the closed magnetic circuit of magnet ring section 1 and Magnetic Sensor 4 compositions.
Technical scheme of the present invention can also comprise: the xsect of described magnet ring section is one or more the combination in rectangle, circle, ellipse, the semicircle.Described closed magnetic circuit be shaped as one or more combination in circle, ellipse, rectangle, rhombus, the triangle.Described Magnetic Sensor is the Hall-type Magnetic Sensor; The type of described Hall-type Magnetic Sensor is a linear hall element.The range of described magnetic sense current sensor is-400A～+ 400A.Described magnet ring section closed magnetic circuit is circular, and when xsect was rectangle, internal diameter was 14～23mm; External diameter is 25～37mm; Thickness is 6～9mm; The every side width of magnetic gap of described Hall-type Magnetic Sensor both sides is 2～3mm; The magnetic gap width of the non-magnetic sensor side in the described two magnet ring sections is 6～9mm.The model of described linear Hall element is 495B.
As Fig. 2, will have the ferrite bead of centralized magnetic gap, cut into two halves with magnetic gap 2 center line symmetries.Two semi-rings are sticked on the inboard of measurement mechanism ring cavity symmetrically, regulate the form that the semi-ring position makes distributed magnetic gap 2 symmetrical on 1 one-tenths space of magnet ring, and the size of each magnetic gap 2 satisfies the requirement of Hall-type Magnetic Sensor 4.Hall-type Magnetic Sensor 4 is placed in one in the magnetic gap, and the outer lead 1 that carries tested electric current passes the magnet ring center.
Closed magnetic circuit can be responded to the electric current by 3 li in the lead in it, and Hall-type Magnetic Sensor 4 is measured the strength of current in the lead 3 in the enclosed region by the magnetic induction density that detects in the magnetic gap 2.Because magnet ring section 1 has two at least, promptly adopt distributed magnetic gap, compare with concentrated magnetic gap, distributed magnetic gap has reduced the influence of the magnetic gap edge effect of magnet ring section 1, so can select the magnetic material that magnetic permeability is higher, cost is lower, hardness is higher, not easily broken; The magnetic gap width-adjustable of magnet ring section 1 is whole, makes transducer range adjustable within the specific limits; Magnet ring section 1 is installed more convenient; Sensor accuracy is higher.
Satisfying under the linear condition that requires, all can place Magnetic Sensor in the magnetic gap arbitrarily.With respect to single magnetic gap, the single magnetic gap size of distributed magnetic gap is little, so magnetic flux edge effect influence is little, and the linearity is higher relatively; And total magnetic gap size of distributed magnetic gap is suitable with concentrated magnetic gap, makes its magnetic resistance equal the magnetic resistance of the magnet ring of single magnetic gap, and the range of current detecting can be adjustable within the specific limits with the width of magnetic gap 2.In principle, guaranteeing under the constant condition of total magnetic gap width, the magnetic gap of placing Magnetic Sensor is more little, its edge effect is more little, the linearity of current detecting and accuracy are high more, but because Magnetic Sensor 4 generally must place magnetic centre of gap, consider installation, the magnetic gap size is also unsuitable too small, satisfies to detect to require to get final product.Under the constant condition of the magnetic gap width that guarantees the Magnetic Sensor side, by regulating the size of another magnetic gap, range that within the specific limits can the fine tuning Hall current sensor.This induced field current sensor that is used for electric vehicle controller structurally can also cushion extraneous moment of torsion, and vibration strength is good, and is not easily broken, can arbitrarily adjust during installation, sticks with glue after adjustment finishes to be connected on the measurement mechanism again.
As shown in Figure 3, Figure 4, closed magnetic circuit can be rectangle or other shapes; The magnetic gap 2 of magnet ring section 1 can be three or more; The different shape that is fit to magnetic sensing element shape can be adopted in the magnet ring cross section, considers edge effect, as long as its cross-sectional area is a bit larger tham the magnetic sensing element, the magnetic sensing element is installed in its scope and gets final product.
Claims (8)
1. induced field current sensor that is used for electric vehicle controller, it is characterized in that: form closed magnetic circuit by ferrite bead section, Magnetic Sensor, described magnet ring section has two at least, described Magnetic Sensor is arranged in the magnetic gap that forms between the described magnet ring section, and described outer lead passes the closed magnetic circuit of magnet ring section and Magnetic Sensor composition.
2. the magnetic sense current sensor that is used for electric vehicle controller according to claim 1 is characterized in that: the xsect of described magnet ring section is one or more the combination in rectangle, circle, ellipse, the semicircle.
3. the magnetic sense current sensor that is used for electric vehicle controller according to claim 1 is characterized in that: described closed magnetic circuit be shaped as one or more combination in circle, ellipse, rectangle, rhombus, the triangle.
4. the magnetic sense current sensor that is used for electric vehicle controller according to claim 1, it is characterized in that: described Magnetic Sensor is the Hall-type Magnetic Sensor; The type of described Hall-type Magnetic Sensor is a linear hall element.
5. the induced field current sensor that is used for electric vehicle controller according to claim 1 is characterized in that: the range of described magnetic sense current sensor for-400A～+ 400A.
6. according to claim 2, the 3 described magnetic sense current sensors that are used for electric vehicle controller, it is characterized in that: described magnet ring section closed magnetic circuit is for circular, and when xsect was rectangle, internal diameter was 14～23mm; External diameter is 25～37mm; Thickness is 6～9mm.
7. the magnetic sense current sensor that is used for electric vehicle controller according to claim 1 is characterized in that: the every side width of magnetic gap of described Hall-type Magnetic Sensor both sides is 2～3mm; The magnetic gap width of the non-magnetic sensor side in the described two magnet ring sections is 6～9mm.
8. the magnetic sense current sensor that is used for electric vehicle controller according to claim 4, it is characterized in that: the model of described linear Hall element is 495B.
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| CN2009100703063A CN102004179A (en) | 2009-09-01 | 2009-09-01 | Magnetic induction current sensor for electric vehicle controller |
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| CN2009100703063A CN102004179A (en) | 2009-09-01 | 2009-09-01 | Magnetic induction current sensor for electric vehicle controller |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818924A (en) * | 2012-09-07 | 2012-12-12 | 天津市松正电动汽车技术股份有限公司 | Controller current sensor |
| CN103091539A (en) * | 2011-11-04 | 2013-05-08 | 通用电气公司 | Systems and methods for use in measuring current through conductor |
| CN103267920A (en) * | 2013-05-08 | 2013-08-28 | 重庆艾派科斯科技有限公司 | Opening current detecting device |
| CN103364680A (en) * | 2013-05-08 | 2013-10-23 | 重庆艾派科斯科技有限公司 | Opening current detector-based direct current grounding alarm |
| CN104515893A (en) * | 2013-10-02 | 2015-04-15 | 洛克威尔自动控制技术股份有限公司 | Hall effect sensor core with multiple air gaps |
| CN104931761A (en) * | 2015-05-25 | 2015-09-23 | 山东航天电子技术研究所 | Magnetic circuit structure of high-precision Hall current sensor |
| CN105158633A (en) * | 2015-09-23 | 2015-12-16 | 厦门红相电力设备股份有限公司 | Method for sharing online state detection data of ultrahigh voltage direct-current lightning arrester by cloud platform |
| CN105301325A (en) * | 2015-09-23 | 2016-02-03 | 厦门红相电力设备股份有限公司 | Ultrahigh voltage DC lightning arrester leakage current acquisition method according to Hall induction theory |
| CN105301324A (en) * | 2015-09-23 | 2016-02-03 | 厦门红相电力设备股份有限公司 | Ultrahigh voltage DC lightning arrester leakage current acquisition method according to magnetic balance theory |
| CN105301323A (en) * | 2015-09-23 | 2016-02-03 | 厦门红相电力设备股份有限公司 | Ultrahigh voltage DC lightning arrester leakage current online detection method by using cloud technology |
| CN105911328A (en) * | 2016-06-06 | 2016-08-31 | 哈尔滨理工大学 | Current sensor based on magnetism-guided loop and magnetic fluid |
| CN106093512A (en) * | 2016-06-21 | 2016-11-09 | 哈尔滨理工大学 | Based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid |
| CN106154016A (en) * | 2016-08-26 | 2016-11-23 | 杭州集普科技有限公司 | A kind of vehicle impact testing current sensor |
| CN110412336A (en) * | 2019-07-22 | 2019-11-05 | 中国科学院上海应用物理研究所 | A kind of detection probe of high precision electric current transducer |
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| US7492145B2 (en) * | 2003-02-27 | 2009-02-17 | Liaisons Electroniques-Mecaniques Lem S.A. | Electric current sensor with a bracket attached to the core on either side of the air-gap and outside of the air gap |
| CN2640821Y (en) * | 2003-09-17 | 2004-09-15 | 深圳市宸诺电气技术有限公司 | Electric car controller |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091539A (en) * | 2011-11-04 | 2013-05-08 | 通用电气公司 | Systems and methods for use in measuring current through conductor |
| US9354257B2 (en) | 2011-11-04 | 2016-05-31 | General Electric Company | Systems and methods for use in measuring current through a conductor |
| CN102818924A (en) * | 2012-09-07 | 2012-12-12 | 天津市松正电动汽车技术股份有限公司 | Controller current sensor |
| CN103267920A (en) * | 2013-05-08 | 2013-08-28 | 重庆艾派科斯科技有限公司 | Opening current detecting device |
| CN103364680A (en) * | 2013-05-08 | 2013-10-23 | 重庆艾派科斯科技有限公司 | Opening current detector-based direct current grounding alarm |
| CN103364680B (en) * | 2013-05-08 | 2016-06-08 | 重庆艾派科斯科技有限公司 | A kind of DC earthing warning howler based on opening current dectector |
| CN104515893A (en) * | 2013-10-02 | 2015-04-15 | 洛克威尔自动控制技术股份有限公司 | Hall effect sensor core with multiple air gaps |
| CN104931761A (en) * | 2015-05-25 | 2015-09-23 | 山东航天电子技术研究所 | Magnetic circuit structure of high-precision Hall current sensor |
| CN105301324A (en) * | 2015-09-23 | 2016-02-03 | 厦门红相电力设备股份有限公司 | Ultrahigh voltage DC lightning arrester leakage current acquisition method according to magnetic balance theory |
| CN105301323A (en) * | 2015-09-23 | 2016-02-03 | 厦门红相电力设备股份有限公司 | Ultrahigh voltage DC lightning arrester leakage current online detection method by using cloud technology |
| CN105301325A (en) * | 2015-09-23 | 2016-02-03 | 厦门红相电力设备股份有限公司 | Ultrahigh voltage DC lightning arrester leakage current acquisition method according to Hall induction theory |
| CN105158633A (en) * | 2015-09-23 | 2015-12-16 | 厦门红相电力设备股份有限公司 | Method for sharing online state detection data of ultrahigh voltage direct-current lightning arrester by cloud platform |
| CN105158633B (en) * | 2015-09-23 | 2018-05-22 | 红相股份有限公司 | The method of UHVDC Arrester state on-line checking data is shared with cloud platform |
| CN105911328A (en) * | 2016-06-06 | 2016-08-31 | 哈尔滨理工大学 | Current sensor based on magnetism-guided loop and magnetic fluid |
| CN106093512A (en) * | 2016-06-21 | 2016-11-09 | 哈尔滨理工大学 | Based on poly-magnetic and cover the difunctional magnetic conductive loop of magnetic and the current sensor of magnetic fluid |
| CN106154016A (en) * | 2016-08-26 | 2016-11-23 | 杭州集普科技有限公司 | A kind of vehicle impact testing current sensor |
| CN106154016B (en) * | 2016-08-26 | 2023-03-14 | 杭州集普科技有限公司 | Current sensor for automobile crash test |
| CN110412336A (en) * | 2019-07-22 | 2019-11-05 | 中国科学院上海应用物理研究所 | A kind of detection probe of high precision electric current transducer |
| CN110412336B (en) * | 2019-07-22 | 2021-12-10 | 中国科学院上海应用物理研究所 | Detection probe of high-precision current sensor |
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Application publication date: 20110406 |