CN101877267A - Magnetoconductive ring - Google Patents
Magnetoconductive ring Download PDFInfo
- Publication number
- CN101877267A CN101877267A CN2009101377697A CN200910137769A CN101877267A CN 101877267 A CN101877267 A CN 101877267A CN 2009101377697 A CN2009101377697 A CN 2009101377697A CN 200910137769 A CN200910137769 A CN 200910137769A CN 101877267 A CN101877267 A CN 101877267A
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- magnetic
- guiding loop
- magnetic guiding
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- 238000005520 cutting process Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 abstract description 29
- 230000009286 beneficial effect Effects 0.000 abstract 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 13
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000012545 processing Methods 0.000 description 7
- 230000014509 gene expression Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000005389 magnetism Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- UVXCXZBZPFCAAJ-UHFFFAOYSA-N arc-111 Chemical compound C1=C2OCOC2=CC2=C(N(CCN(C)C)C(=O)C3=C4C=C(C(=C3)OC)OC)C4=CN=C21 UVXCXZBZPFCAAJ-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
- G01D2205/40—Position sensors comprising arrangements for concentrating or redirecting magnetic flux
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The invention discloses a magnetoconductive ring which is composed of two or more segmental arcs with the same radius and the same center of circle, wherein a gap is left between every two segmental arcs. By using the magnetoconductive ring with the structure, the magnetic field inside the magnetoconductive ring is uniformly distributed and has small leakage; and the signal induced by the magnetic induction part is an integral type, so the signal noise is low and the contained ultraharmonic component is small, thereby being beneficial to enhancing the quality of the original signal and increasing the signal to noise ratio of the signal. By using the structure, the invention does not have harsh requirements for machine dimensions, has wide ranges for type options, and even does not use the subsequent amplifying circuit, thereby being beneficial to lowering the product cost and increasing the cost performance.
Description
Technical field
The present invention relates to a kind of magnetic element, specifically, relate to a kind of magnetic guiding loop.
Background technology
The position detecting device of using in Motor Control Field mainly is an encoder, described encoder is a kind of to be the position transducer that physical quantitys such as motor spin angular position, angular speed is converted to the signal of telecommunication, and the manufacturing of encoder and signal processing level directly have influence on automatization level.
At present, the encoder of using in the field of engineering technology mainly is an optical-electricity encoder, and optical-electricity encoder has two kinds of increment type and absolute types.In incremental encoder, drive the grating disc spins during axle rotation, the light that light-emitting component sends is cut into interrupted light by the slit of grating dish, is accepted by receiving element and exports corresponding pulse signal, and direction of rotation and number of pulses need realize by the direction judgment circuit sum counter.The counting starting point can be set arbitrarily, and the output pulse was remembered the position by the internal storage unit of counting equipment when the increment of rotation encoder rotated.Do not disturb and then pulse-losing yet do not allow in this encoder course of work, otherwise will be offset and be unable to find out the zero point of numeration equipment memory.
In order to address the above problem, absolute type encoder has appearred.Absolute type encoder output and position be code one to one, can determine direction of rotation and rotor current location from the size variation of code.Improved the reliability of anti-interference and data so greatly, absolute type encoder has been applied to angular surveying, linear measure longimetry and the Position Control of various industrial systems more and more.
Yet there are some shortcomings that are difficult to overcome in photoelectric encoder: photoelectric encoder is formed by groove by glass substance, and its anti-vibration and impact capacity are not strong, are not suitable for adverse circumstances such as dust, dewfall, and structure and location assembling complexity; Ruling span has the limit, improve resolution and must increase code-disc, thereby be difficult to accomplish miniaturization; Must guarantee very high assembly precision aborning, directly have influence on production efficiency, finally influence product cost.
In order to solve the problem that occurs in the photoelectric encoder, a kind of magneto-electric encoder has been proposed again.The stator and the rotor of tradition magnetoelectric transducer are made by pure iron, are fixed with permanent magnet on the stator, form magnetic circuit system.Be provided with tooth and groove that number equates on the stator annular end face relative equably with rotor, rotor and main shaft tighten up, main shaft is connected with measured rotating shaft, main shaft drives rotor rotation, when rotor tooth is relative with stator tooth, and the air gap minimum, the magnetic flux maximum, when rotor tooth is relative with stator slot, air gap maximum, magnetic flux minimum.Can pass through for example variation of the detection magnetic flux of magnetic induction sensor, and this variation is changed into signal of telecommunication pulse.This type of encoder is many, but certainty of measurement is lower, and can only realize increment output.
For example, patent CN 200410024190.7 discloses a kind of magnetism encoder structure with two, three, four, six transducers, as shown in Figure 1, in the structure of this magnetism encoder, the mode that magnetic induction part adopts the surface to paste, promptly arrange magnetic induction part, be rotated the induction in magnetic field, obtain rotation angle value according to the sensor voltage value then at annular stator madial wall.
Yet above-mentioned magnetism encoder has following shortcoming on physical structure:
The stator inboard generally is circular arc and smooth, and transducer is difficult for installing and fixing, and causes position error easily, and then causes the phase deviation of signal, makes that higher harmonic components is big in the signal; The process for machining and manufacturing complexity is unfavorable for industrialization;
Reliability is low, and transducer is distributed in madial wall, and the support matrices of transducer is necessary for flexible body such as FPC etc., and it is not high with its tensile strength of processing body contact position, breaks easily, has increased difficulty of processing, influences the life-span of product;
The magnetic field of sensor sensing is revealed big, and magnetic field can not fully be used, and makes that noise is big in the signal, influences certainty of measurement;
The requirement sensor bulk is little, makes product cost than higher.
Summary of the invention
The technical problem to be solved in the present invention is, at above-mentioned the deficiencies in the prior art, has proposed a kind of magnetic guiding loop, can simplify production technology, improves signal accuracy, reduces product cost, improves cost performance.
For solving the problems of the technologies described above, the present invention proposes a kind of magnetic guiding loop, described magnetic guiding loop is made of the segmental arc of two sections or the same radius of multistage, concentric, and adjacent two segmental arcs leave the slit.
Further, described magnetic guiding loop is made of the segmental arc of two sections same radiuses, concentric, is respectively 1/4 segmental arc and 3/4 segmental arc; Perhaps, described magnetic guiding loop is made of three sections segmental arcs with radius, is respectively 1/3 segmental arc; Perhaps, described magnetic guiding loop is made of four sections segmental arcs with radius, is respectively 1/4 segmental arc; Perhaps, described magnetic guiding loop is made of six sections segmental arcs with radius, is respectively 1/6 segmental arc.
Further, the segmental arc end of described magnetic guiding loop is provided with chamfering; Particularly, described chamfering for vertically or radially or vertically simultaneously, the chamfering that forms of radial cutting.
By adopting the magnetic guiding loop of this structure, make the magnetic guiding loop internal magnetic field be evenly distributed, reveal little, and the signal of magnetic induction part induction is an integral form, and signal noise is little, and contained higher harmonic components composition is little, help improving the primary signal quality, improve Signal-to-Noise.And, dwindle effective area by the increase chamfering of magnetic guiding loop, help improving the magnetic field intensity of magnetic induction part surface induction, can reduce to a certain extent can reduce the mechanical dimension of whole encoder to the magnet size requirement.In addition, adopt this structure, the mechanical dimension of magnetic induction part is not had harsh requirement, can select the model wide ranges for use, or even need not adopt follow-up amplifying circuit, help reducing product cost, improve cost performance.The use of the magnetic guiding loop of said structure also makes magnetic induction part directly to be fixed on the circuit board, need not adaptor, helps improving reliability of products.
Description of drawings
Fig. 1 is the structural representation of magneto-electric encoder in the prior art;
Fig. 2 A～Fig. 2 D is the chamfer design figure of magnetic guiding loop of the present invention;
Fig. 3 is the three-dimensional exploded view that expression is provided with the magnetoelectric sensor of magnetic guiding loop of the present invention;
Fig. 4 is that magnetic guiding loop of the present invention is installed on the stereogram on the skeleton;
Fig. 5 is the structural representation of the application examples 1 of magnetic guiding loop of the present invention when being divided into two sections;
Fig. 6 is the structural representation of the application examples 2 of magnetic guiding loop of the present invention when being divided into four sections;
Fig. 7 is the structural representation of the application examples 3 of magnetic guiding loop of the present invention when being divided into three sections;
Fig. 8 is the structural representation of the application examples 4 of magnetic guiding loop of the present invention when being divided into six sections.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is described in detail.
Embodiment
Fig. 2 A～Fig. 2 D is the chamfer design figure of magnetic guiding loop of the present invention.Shown in Fig. 2 A～Fig. 2 D, magnetic guiding loop is made of the segmental arc of two sections or the same radius of multistage, concentric, magnetic guiding loop shown in Fig. 2 A does not design chamfering, segmental arc end shown in Fig. 2 B～Fig. 2 D is provided with chamfering, described chamfering be vertically (Fig. 2 B) or radially (Fig. 2 C) or vertically simultaneously, the chamfering that forms of (Fig. 2 D) cutting radially, 151,153 expression axial slices, 152,154 expression radial sections.Leave the slit between adjacent two segmental arcs, magnetic induction part places in this slit, and when magnetic steel ring and magnetic guiding loop generation relative rotary motion, described magnetic induction part is converted to voltage signal with the magnetic signal that senses, and this voltage signal is transferred to corresponding controller.
According to magnetic Migong formula
Can know, when φ is certain, can increase B by reducing S.
Because the magnetic flux that permanent magnet produces is certain, S is bigger in magnetic guiding loop, so B is smaller, therefore can reduce the heating that causes because of the magnetic field alternation.And the chamfering that magnetic guiding loop increases has reduced magnetic guiding loop end area, can increase the magnetic field intensity of end, makes the output signal of magnetic induction part strengthen.Such picking up signal structure manufacturing process is simple, and the signal noise of picking up is little, and production cost is low, the reliability height, and also size is little.
Application examples
Fig. 3 is the three-dimensional exploded view that expression is provided with the magnetoelectric sensor of magnetic guiding loop of the present invention.Fig. 4 is that magnetic guiding loop of the present invention is installed on the stereogram on the skeleton.As shown in Figure 3 and Figure 4, magnetoelectric sensor is made up of magnetic induction part plate 102, magnetic steel ring 103, magnetic guiding loop 104, skeleton 105; Magnetic induction part plate 102 is made up of pcb board and magnetic induction part 106, and connector 108 also is housed on the magnetic induction part plate 102.
Wherein, when making described magnetoelectric sensor, magnetic guiding loop 104 is arranged on the skeleton forming mould, when described skeleton is one-body molded and skeleton 105 be fixed together.
Application examples 1
Fig. 5 is the application examples 1 of magnetic guiding loop of the present invention when being divided into two sections.As shown in Figure 5, magnetic guiding loop is made of two sections segmental arcs with radius, is respectively 1/4 segmental arc 111 and 3/4 segmental arc 112, and position A and B are 90 ° at a distance of angle, and have slit, respectively with 109 and 110 two magnetic induction part H that represent
1, H
2Be positioned in the slit at A and B place, adopt this structure to help reducing magnetic field and reveal, improve the magnetic flux of magnetic induction part induction, and because the magnetic flux of magnetic surface induction is the integration in magnetic field, therefore have utilize reduce signal noise with signal in high order harmonic component.Detailed process as for signal processing does not elaborate herein.On motor shaft, by two sections magnetic guiding loops and magnetic steel ring 113 concentric installations that constitute with the segmental arc 111,112 of radius.
Application examples 2
Fig. 6 is the application examples 2 of magnetic guiding loop of the present invention when being divided into four sections.As shown in Figure 5, magnetic guiding loop is made of four sections 1/4 segmental arcs 118,119,120 and 121 with radius, A, and B, C, four position angles of D are divided into 90 ° successively mutually, and a slit is all arranged.Respectively with 114,115,116 and 117 4 magnetic induction part H that represent
1, H
2, H
3, H
4Be positioned over slit A, B, C and D place respectively, adopting this structure to help reducing magnetic field reveals, improve the magnetic flux of magnetic induction part induction, and because the magnetic flux of magnetic surface induction is the integration in magnetic field, therefore have utilize reduce signal noise with signal in high order harmonic component.Detailed process as for signal processing does not elaborate herein.Four sections 1/4 segmental arc 118,119,120 and 121 magnetic guiding loop and magnetic steel ring 122 that constitute with radius are installed with one heart.
Application examples 3
Fig. 7 is the application examples 3 of magnetic guiding loop of the present invention when being divided into three sections.As shown in Figure 7, magnetic guiding loop is made of three sections 1/3 segmental arcs 126,127 and 128 with radius, A, and B, three positions of C are successively at a distance of 120 °, and have a slit, respectively with 3 transducer H of 123,124 and 125 expressions
1, H
2, H
3Place the slit place respectively, adopt this structure to help reducing magnetic field and reveal, improve the magnetic flux of sensor sensing, and because the magnetic flux of sensor surface induction is the integration in magnetic field, therefore have utilize reduce signal noise with signal in high order harmonic component.Detailed process as for signal processing does not elaborate herein.Three sections 1/3 segmental arc 126,127 and 128 magnetic guiding loop and magnetic steel ring 129 that constitute with radius are installed with one heart.
Application examples 4
Fig. 8 is the application examples 4 of magnetic guiding loop of the present invention when being divided into six sections.As shown in Figure 8, magnetic guiding loop constitutes A, B by six sections 1/6 segmental arcs 136,137,138,139,140 and 141 with radius, C, D, E, six positions of F are successively at a distance of 60 °, and all have a slit, respectively with 6 transducer H of 130,131,132,133,134 and 135 expressions
1, H
2, H
3, H
4, H
5, H
6Place respectively in the slit, adopt this structure to help reducing magnetic field and reveal, improve the magnetic flux of sensor sensing, and because the magnetic flux of sensor surface induction is the integration in magnetic field, therefore have utilize reduce signal noise with signal in high order harmonic component.Detailed process as for signal processing does not elaborate herein.On the unsupported output axle of motor permanent-magnetic clamp is housed, installs with one heart by six sections magnetic guiding loop and magnetic steel ring 142 that constitute with 1/6 segmental arc 136,137,138,139,140 and 141 of radius.
Magnetic guiding loop among above-mentioned four embodiment all can adopt any chamfering form among Fig. 2 C-2D.
Abovely describe each embodiment of the present invention in detail, yet the present invention is not limited to described embodiment, but under the situation of the scope that does not break away from claims, can makes various changes and modifications with reference to accompanying drawing.
Claims (4)
1. magnetic guiding loop, described magnetic guiding loop is made of the segmental arc of two sections or the same radius of multistage, concentric, and adjacent two segmental arcs leave the slit.
2. magnetic guiding loop as claimed in claim 1 is characterized in that, described magnetic guiding loop is made of the segmental arc of two sections same radiuses, concentric, is respectively 1/4 segmental arc and 3/4 segmental arc; Perhaps, described magnetic guiding loop is made of three sections segmental arcs with radius, is respectively 1/3 segmental arc; Perhaps, described magnetic guiding loop is made of four sections segmental arcs with radius, is respectively 1/4 segmental arc; Perhaps, described magnetic guiding loop is made of six sections segmental arcs with radius, is respectively 1/6 segmental arc.
3. magnetic guiding loop as claimed in claim 1 or 2 is characterized in that, the segmental arc end of described magnetic guiding loop is provided with chamfering.
4. magnetic guiding loop as claimed in claim 3 is characterized in that, described chamfering for vertically or radially or vertically simultaneously, the chamfering that forms of radial cutting.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101377697A CN101877267B (en) | 2009-04-30 | 2009-04-30 | Magnetoconductive ring |
| PCT/CN2010/071942 WO2010124573A1 (en) | 2009-04-30 | 2010-04-20 | Magnetically conductive ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101377697A CN101877267B (en) | 2009-04-30 | 2009-04-30 | Magnetoconductive ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101877267A true CN101877267A (en) | 2010-11-03 |
| CN101877267B CN101877267B (en) | 2013-01-02 |
Family
ID=43019794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101377697A Expired - Fee Related CN101877267B (en) | 2009-04-30 | 2009-04-30 | Magnetoconductive ring |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101877267B (en) |
| WO (1) | WO2010124573A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474196A (en) * | 2013-08-28 | 2013-12-25 | 昆山佑翔电子科技有限公司 | Combined magnetic ring |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113937979B (en) * | 2021-03-11 | 2023-03-14 | 国家电投集团科学技术研究院有限公司 | Permanent magnet gear speed change device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2182497Y (en) * | 1994-01-22 | 1994-11-09 | 朱杰 | Magnetic inductive coder |
| DE19630764A1 (en) * | 1995-09-29 | 1997-04-03 | Bosch Gmbh Robert | Contact free identification device for relative movement |
| DE19716985A1 (en) * | 1997-04-23 | 1998-10-29 | A B Elektronik Gmbh | Device for determining the position and / or torsion of rotating shafts |
| CN100339684C (en) * | 2004-06-03 | 2007-09-26 | 威海华控电工有限公司 | Four-sensor style coding device |
| CN2880170Y (en) * | 2006-01-12 | 2007-03-21 | 林丽裡 | Magnetic conduct ring structure of improved magnetical controlled wheel |
| CN201503740U (en) * | 2009-04-30 | 2010-06-09 | 浙江关西电机有限公司 | Magnetic ring |
-
2009
- 2009-04-30 CN CN2009101377697A patent/CN101877267B/en not_active Expired - Fee Related
-
2010
- 2010-04-20 WO PCT/CN2010/071942 patent/WO2010124573A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474196A (en) * | 2013-08-28 | 2013-12-25 | 昆山佑翔电子科技有限公司 | Combined magnetic ring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101877267B (en) | 2013-01-02 |
| WO2010124573A1 (en) | 2010-11-04 |
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Address after: 310019 4D, No. nine, 63 Ring Road, Jianggan District, Zhejiang, Hangzhou Applicant after: Zhejiang Zhongke Derun Technology Co.,Ltd. Address before: 310019 4D, No. nine, 63 Ring Road, Jianggan District, Zhejiang, Hangzhou Applicant before: Zhejiang Guanxi Electric & Motor Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: ZHEJIANG GUANXI ELECTRIC + MOTOR CO., LTD. TO: ZHEJIANG ZHONGKE DERUN TECHNOLOGY CO., LTD. |
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Effective date of registration: 20170825 Address after: Hangzhou City, Zhejiang province Tonglu County Tonglu 311500 Beach Road Economic Development Zone No. 77 Patentee after: Hangzhou Corecess energy-saving equipment Limited by Share Ltd Address before: 310019 4D, No. nine, 63 Ring Road, Jianggan District, Zhejiang, Hangzhou Patentee before: Zhejiang Zhongke Derun Technology Co.,Ltd. |
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Granted publication date: 20130102 Termination date: 20190430 |