CN101877267B - Magnetoconductive ring - Google Patents

Magnetoconductive ring Download PDF

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Publication number
CN101877267B
CN101877267B CN2009101377697A CN200910137769A CN101877267B CN 101877267 B CN101877267 B CN 101877267B CN 2009101377697 A CN2009101377697 A CN 2009101377697A CN 200910137769 A CN200910137769 A CN 200910137769A CN 101877267 B CN101877267 B CN 101877267B
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China
Prior art keywords
guiding loop
magnetic
signal
magnetic guiding
segmental arc
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Expired - Fee Related
Application number
CN2009101377697A
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Chinese (zh)
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CN101877267A (en
Inventor
郝双晖
郝明晖
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Hangzhou Corecess energy-saving equipment Limited by Share Ltd
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ZHEJIANG ZHONGKE DERUN TECHNOLOGY CO LTD
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Priority to CN2009101377697A priority Critical patent/CN101877267B/en
Priority to PCT/CN2010/071942 priority patent/WO2010124573A1/en
Publication of CN101877267A publication Critical patent/CN101877267A/en
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Publication of CN101877267B publication Critical patent/CN101877267B/en
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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

A kind of magnetic guiding loop
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 encoder, described encoder is a kind of to be the position transducer that the 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 horizontal directly have influence on automatization level.
At present, the encoder of using in the field of engineering technology mainly is optical-electricity encoder, and optical-electricity encoder has two kinds of increment type and absolute types.In incremental encoder, drive the grating disc rotation during axle rotation, the light that light-emitting component sends is cut into interrupted light by the slit of grating disc, is accepted by receiving element and exports corresponding pulse signal, and direction of rotation and number of pulses need to realize by the direction judgment circuit sum counter.But counting starting point Set arbitrarily, the output pulse was remembered the position by the internal storage unit of counting equipment when the increment of rotation encoder rotated.Yet do not allowed in this encoder course of work to disturb and then pulse-losing, otherwise will be offset and be unable to find out the zero point of counting device 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.So greatly improved anti-interference and the reliability of the data, 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 the 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 affect product cost.
In order to solve the problem that occurs in the photoelectric encoder, a kind of magneto-electric encoder has been proposed again.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 equably tooth and groove that number equates on the stator annular end face relative with rotor, rotor and main shaft tighten up, main shaft is connected with measured rotating shaft, the main shaft rotor driven rotates, and when rotor tooth was relative with stator tooth, air gap was minimum, magnetic flux is maximum, when rotor tooth was relative with stator slot, air gap was maximum, and magnetic flux is 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, magnetic induction part adopts the mode of surface label, namely arrange magnetic induction part at annular stator madial wall, be rotated the induction in magnetic field, then obtain rotation angle value according to the sensor voltage value.
Yet above-mentioned magnetism encoder has following shortcoming in physical structure:
The stator inboard generally is circular arc and smooth, and transducer is difficult for installing and fixing, and causes easily position error, and then causes the phase deviation of signal, so that higher harmonic components is large in the signal; Process for machining and manufacturing is complicated, 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, affects the life-span of product;
The magnetic field of sensor sensing is revealed large, and magnetic field can not fully be used, so that noise is large in the signal, affects certainty of measurement;
The requirement sensor bulk is little, so that product cost is higher.
Summary of the invention
The technical problem to be solved in the present invention is, for 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, and described magnetic guiding loop plays magnet accumulating cap.
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, so that the magnetic guiding loop internal magnetic field is evenly distributed, reveal little, and the signal of magnetic induction part induction is integral form, and signal noise is little, and contained higher harmonic components composition is little, be conducive to improve the primary signal quality, improve Signal-to-Noise.And, dwindle effective area by the increase chamfering of magnetic guiding loop, be conducive to improve 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, or even need not adopt follow-up amplifying circuit, be conducive to reduce product cost, improve cost performance.The use of the magnetic guiding loop of said structure also so that magnetic induction part can directly be fixed on the circuit board, need not adaptor, is conducive to improve the reliability of product.
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 magnet 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 B = Φ S Can know, when φ is certain, can by reducing S, increase B.
Because the magnetic flux that permanent magnet produces is certain, S is larger 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, so that the output signal of magnetic induction part strengthens.Such picking up signal structure manufacturing process is simple, and the signal noise of picking up is little, and production cost is low, and reliability is high, and 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 comprised of magnetic induction part plate 102, magnet steel ring 103, magnetic guiding loop 104, skeleton 105; Magnetic induction part plate 102 is comprised of pcb board and magnetic induction part 106, and connector 108 also is housed on the magnetic induction part plate 102.
Magnet steel ring 103 is contained on the motor shaft, and magnetic guiding loop 104 is fixed on the skeleton 105, and skeleton 105 is fixed on the correct position of motor.When motor shaft rotated, magnet steel ring 103 rotated, and produces sinusoidal magnetic field, and 104 magnet accumulating caps of magnetic guiding loop, the magnetic flux that magnet steel ring 103 produces is by magnetic guiding loop 104.Magnetic induction part 106 fixing on the pcb board converts the magnetic field by magnetic guiding loop 104 to voltage signal and output, and this voltage signal directly enters the master control borad chip.By the master control chip on board voltage signal is processed, obtained at last the parallactic angle displacement.
Wherein, when making described magnetoelectric sensor, magnetic guiding loop 104 is arranged on the framework forming die, 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 be conducive to reduce 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.The detailed process of processing as for signal does not elaborate herein.On motor shaft, by two sections magnetic guiding loops and the 113 concentric installations of magnet steel ring that consist of 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 arranged.Respectively with 114,115,116 and 117 4 magnetic induction part H that represent 1, H 2, H 3, H 4Be positioned over respectively slit A, B, C and D place, adopting this structure to be conducive to reduce 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.The detailed process of processing as for signal does not elaborate herein.Four sections 1/4 segmental arcs 118 with radius, 119,120 and 121 magnetic guiding loop and magnet steel rings 122 that consist of 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 respectively the slit place, adopt this structure to be conducive to reduce 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.The detailed process of processing as for signal does not elaborate herein.Three sections 1/3 segmental arcs 126 with radius, 127 and 128 magnetic guiding loop and magnet steel rings 129 that consist of 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 consists of 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 be conducive to reduce 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.The detailed process of processing as for signal does not elaborate herein.On the unsupported output axle of motor permanent-magnetic clamp is housed, is installed with one heart by six sections 1/6 segmental arcs 136 with radius, 137,138,139,140 and 141 magnetic guiding loops that consist of and magnet steel ring 142.
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 with reference to accompanying drawing, yet the present invention is not limited to described embodiment, but in the situation of the scope that does not break away from claims, can makes a variety of changes and improve.

Claims (3)

1. magnetic guiding loop, 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 the segmental arc of three sections same radiuses, concentric, is respectively 1/3 segmental arc; Perhaps, described magnetic guiding loop is made of the segmental arc of six sections same radiuses, concentric, is respectively 1/6 segmental arc; Adjacent two segmental arcs leave the slit, and described magnetic guiding loop plays magnet accumulating cap.
2. magnetic guiding loop as claimed in claim 1 is characterized in that, the segmental arc end of described magnetic guiding loop is provided with chamfering.
3. magnetic guiding loop as claimed in claim 2 is characterized in that, described chamfering for vertically or radially or vertically simultaneously, the chamfering that forms of radial cutting.
CN2009101377697A 2009-04-30 2009-04-30 Magnetoconductive ring Expired - Fee Related CN101877267B (en)

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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

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Application Number Priority Date Filing Date Title
CN2009101377697A CN101877267B (en) 2009-04-30 2009-04-30 Magnetoconductive ring

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CN101877267B true CN101877267B (en) 2013-01-02

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103474196B (en) * 2013-08-28 2016-09-28 昆山佑翔电子科技有限公司 Combination magnet ring
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6201389B1 (en) * 1997-04-23 2001-03-13 Ab Eletronik Gmbh Device for determining the angular position of a rotating shaft
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

Family Cites Families (3)

* Cited by examiner, † Cited by third party
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
CN100339684C (en) * 2004-06-03 2007-09-26 威海华控电工有限公司 Four-sensor style coding device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6201389B1 (en) * 1997-04-23 2001-03-13 Ab Eletronik Gmbh Device for determining the angular position of a rotating shaft
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

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WO2010124573A1 (en) 2010-11-04

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Address after: 310019 4D, No. nine, 63 Ring Road, Jianggan District, Zhejiang, Hangzhou

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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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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

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