CN110224555A - A kind of magnetic electrical device of low magnetic resistance - Google Patents
A kind of magnetic electrical device of low magnetic resistance Download PDFInfo
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- CN110224555A CN110224555A CN201910299824.6A CN201910299824A CN110224555A CN 110224555 A CN110224555 A CN 110224555A CN 201910299824 A CN201910299824 A CN 201910299824A CN 110224555 A CN110224555 A CN 110224555A
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- magnetic
- arm
- magnetic conduction
- side magnetic
- conduction arm
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
Abstract
The present invention relates to magneto-electric coupled sensor technical fields, and in particular to a kind of magnetic electrical device of low magnetic resistance, for detecting movement parts, comprising: magnet, for providing magnetic field, magnetic field extends along the motion path of detected movement parts and the lateral diverging to motion path；Several the first side magnetic conduction arms are arranged along magnetic field extending direction, and two magnetic poles in the first side of magnetic field extending direction connection magnetic field, are used to form the first side flux path；Second side magnetic conduction arm, connect with movement parts, and moves with movement parts with respect to the first side magnetic conduction arm, periodically couples with the first side magnetic conduction arm in motion process and flux path is collectively formed, and the magnetic flux of the first side magnetic conduction arm is made to generate cyclically-varying；Several induction coils cover on the first side magnetic conduction arm, incude magnetic flux change in the first side magnetic conduction arm, export electromotive force signal.Substantial effect of the invention is: improve displacement, velocity measuring sensitivity；It reduces reluctance force and the state of detected movement parts is influenced.
Description
Technical field
The present invention relates to magneto-electric coupled sensor technical fields, and in particular to a kind of magnetic electrical device of low magnetic resistance.
Background technique
Currently, displacement sensor and speed probe are widely used in various kinds of equipment.Such as displacement sensor application
In hydraulic system, the extended length of hydraulic stem is measured.Speed probe is used to measure the revolving speed of stirring rod in capsul.With
The raising in manufacturing development, equipment precision and service life also proposed higher want to displacement sensor and speed probe
It asks.Compared to contact type measurement sensor, have service life length, abrasion small and maintenance using the noncontacting proximity sensor of magnetoelectricity conversion
Simple advantage, thus be widely used.Such as measuring the rotational displacement of internal-combustion engine machine crankshaft and the electromagnetism arteries and veins of revolving speed
Rush formula sensor.However, reluctance force of traditional electromagnetic pulse formula sensor in coil cutting magnetic induction line is larger, need to consume
More power causes the waste of energy.Thus need the magnetic resistance for how reducing magnetoelectricity pulse transducer studied.
Applicant has found with the closest prior art of the application by retrieval as application No. is CN96220766.7, public
Opening day is the utility model patent on the 23rd of September in 1998, and patent name is coupling magnetoelectric sensor, and electromagnetic principle is used to test
Seal the component of axis revolving speed.It is made of generator and receiver two parts, generator is mounted on the axis sealed, receiver installation
Outside sealing shroud, generator is made (magnetic resistance is small) of pure iron, and the shape of top and bottom is similar with gear, upper and lower end each ten
Two teeth, sealing shroud 2 are made of magnetic separator 1Cr18Ni9Ti stainless steel, and receiver is by probe, link block, iron core, line packet and outer
Shell composition, probe are made of magnet, and iron core is made of pure iron, they is mounted on link block, and collectively constitute a horseshoe
Shape magnet, the upper and lower end tooth of alignment probe generator.When axis rotates one week generator and receiver coupling 12 times, this is just quilt
It surveys revolving speed and is changed into coupling frequency, the revolving speed of indicating sealing axis.
The drawbacks of its scheme is: the part that the magnetic field of horseshoe magnet dissipates outward is not utilized, and wastes magnetic field
Resource；In order to form clearly pulse, there are larger gaps for the between cog needs of generator, cannot intensively arrange, increase magnetic
The inhomogeneities of field distribution increases reluctance force, while also increasing its minimum angular displacement being able to detect that, reduces sensitive
Degree.
Summary of the invention
The technical problem to be solved by the present invention is the technical problem that current magnetic electrical device magnetic resistance is big or sensitivity is low.It mentions
A kind of magnetic electrical device of the Distribution of Magnetic Field more evenly higher low magnetic resistance of magnetic resistance more sluggishness is gone out.
In order to solve the above technical problems, the technical solution used in the present invention are as follows: a kind of magnetic electrical device of low magnetic resistance is used for
Detect movement parts, comprising: magnet, for providing magnetic field, the magnetic field extend along the motion path of detected movement parts and to
The lateral diverging of motion path；Several the first side magnetic conduction arms, along magnetic field extending direction close-packed arrays, and from magnetic field extending direction
The first side connection magnetic field two magnetic poles, be used to form the first side flux path；Second side magnetic conduction arm, connect with movement parts, and
It is moved with movement parts with respect to the first side magnetic conduction arm, is periodically coupled with the first side magnetic conduction arm in motion process and magnetic flux is collectively formed
Road makes the magnetic flux of the first side magnetic conduction arm generate cyclically-varying；Several induction coils cover on the first side magnetic conduction arm, sense
Magnetic flux change in the first side magnetic conduction arm is answered, electromotive force signal is exported.
The technical program has multiple first side magnetic conduction arms and induction coil, makes detection movement parts movement can compared with thin tail sheep
Induced electromotive force is generated at least to trigger an induction coil, improves the sensitivity of detection.
Preferably, second side magnetic conduction arm has magnetism.In this optimal technical scheme, if the magnetic of second side magnetic conduction arm
Property pole orientation is identical as magnet poles direction, when second side magnetic conduction arm is coupled with the first side magnetic conduction arm, can lead second side
The magnetic induction line of magnetic arm and the magnetic induction line for being scattered in the side that magnet is located at second side magnetic conduction arm, which force, imports the first side magnetic conduction arm,
When being detached from coupling, these additional magnetic induction lines will be extracted out；If the pole orientation of second side magnetic conduction arm and magnet poles direction phase
Instead, when second side magnetic conduction arm is coupled with the first side magnetic conduction arm, more magnetic induction lines can be extracted out first side magnetic conduction arm, works as disengaging
When coupling, these magnetic induction lines additionally extracted out will reenter the first side magnetic conduction arm；So that second side magnetic conduction arm with
In first side magnetic conduction arm periodicity coupling process, the variation of caused first side magnetic conduction arm magnetic flux is bigger, generates stronger sense
Electromotive force is answered, the sensitivity to detection speed is improved.
Preferably, further including two for collapsing the end magnetizer in magnetic field at two magnetic poles of magnet, the first side magnetic conduction arm
And second side magnetic conduction arm passes through described two end magnetizers and couples with two magnetic poles in magnetic field.In this optimal technical scheme,
Magnetic field at two magnetic poles of magnet is collapsed, magnetic field resource is made to be fully utilized, the sensitivity detected to movement velocity is improved, holds simultaneously
Good conductor of the magnetizer as magnetic makes the magnetic induction line of magnet tend to homogenize faster in the magnetizer of end, reduces reluctance force.
Preferably, second side magnetic conduction arm is greater than the first side magnetic conduction arm along motion path along the span of motion path
Span；The magnetic electrical device includes two magnets and several second side magnetic conduction arms, several described second side magnetic conduction arms are divided into
Two groups be aligned respectively with two magnet, with group, adjacent second side magnetic conduction arm pole orientation is on the contrary, along two magnet line sides
Second side magnetic conduction arm pole orientation to alignment is opposite.In this optimal technical scheme, compact arranged and mutually abutting
Side magnetic conduction arm keeps the magnetic field of magnet more dense in the strong and weak variation of generation, when reducing magnetic field power alternating by more dense variation
Intensity difference, to reduce reluctance force.By two magnets of setting and two groups of second side magnetic conduction arms, the first side magnetic conduction can be improved
The magnetic flux change of arm improves detection sensitivity, reduces the requirement to single magnets magnetic fields intensity.
Preferably, second side magnetic conduction arm is greater than the first side magnetic conduction arm along motion path along the span of motion path
Span.In this optimal technical scheme, by widening second side magnetic conduction arm, generates induction coil and deposited between positive pulse and negative pulse
The time interval of two subpulse resistances has been pulled open at interval in time, is given detected movement parts more times and is restored arteries and veins
The influence of resistance bring is rushed, reducing reluctance force influences the motion state of detected movement parts.
Preferably, the detected movement parts are rotating motion part；The magnet is magnet ring, the magnetic pole edge of the magnet ring
Ring axial magnetic；First side magnetic conduction arm along magnet ring inner headed face or outer circle EDS maps, the first side magnetic conduction arm both ends respectively with two magnetic of magnet ring
Pole coupling, for second side magnetic conduction arm in thickness along the fan ring body of ring axial magnetic, second side magnetic conduction arm is located at magnet ring and the first side magnetic conduction
The opposite side of arm, second side magnetic conduction arm are connect with rotating motion part by connector and are rotated with rotating motion part, second side
The rotary shaft and fan ring body central axis of magnetic conduction arm are coaxial with magnet ring；The both ends of first side magnetic conduction arm cover or part covering magnetic
The both ends of the surface of ring, first two end faces of side magnetic conduction arm are the arc surface concentric with magnet ring, and second side magnetic conduction arm is equipped with and first
Two end faces of side magnetic conduction arm form the coupling part of uniform gap.
In this optimal technical scheme, when second side magnetic conduction arm is rotated with rotating motion part, can periodically it be led with the first side
Magnetic arm coupling, shares the magnetic flux in the first side magnetic conduction arm, makes the change of the magnetic flux of the first side magnetic conduction arm generating period therewith
Change, the variation of magnetic flux can be converted to by induction coil by the output of EMF pulse signal, by the way which the first side judged
Induction coil on magnetic conduction arm generates EMF pulse, so that it may know the angular displacement of movement parts rotation；Movement parts rotation speed
When faster, the amplitude of EMF pulse signal is bigger, thus may be implemented to test the speed.
Preferably, second side magnetic conduction arm has magnetism, the magnetic pole of second side magnetic conduction arm is along ring axial magnetic；The magnetic
Electric installation includes several second side magnetic conduction arms, the week of several rotation centers of second side magnetic conduction arm along rotating motion part
To being uniformly distributed, the both ends of the surface of several second side magnetic conduction arms distinguish concordant, the pole orientation phase of adjacent second side magnetic conduction arm
Instead.
In this optimal technical scheme, equally distributed second side magnetic conduction arm when rotated, can be avoided deviation of gravity center rotation
Center avoids vibrating；The pole orientation of adjacent second side magnetic conduction arm is on the contrary, the adjacent pulse for generating the same induction coil
Polarity can be improved the detectable revolving speed upper limit on the contrary, conveniently recognized.
Preferably, the magnetic electrical device includes two magnet rings and two end magnetizers, described two magnet rings are concentric and magnetic
Extreme direction is identical, several described the first side magnetic conduction arms are equipped with upper arm, middle arm, lower arm and linking arm, the linking arm connection
The first end of upper arm, middle arm and lower arm, for the line of induction snare on middle arm, first end magnetizer covers first
The lower end surface of the upper surface of magnet ring, first magnet ring is covered by the upper surface of middle arm, and upper arm is connect with first end magnetizer, the
Two end magnetizers cover the lower end surface of second magnet ring, and the upper surface of second magnet ring is covered by the lower surface of middle arm, lower arm
It is connect with second end magnetizer, the middle arm processes jagged, described two end magnetic guiding loops along the middle part of magnet ring thickness direction
Inner wall and the second end face of middle arm be substantially flush with magnet ring inner wall；Several described second side magnetic conduction arms are divided into quantity phase
Same two groups, the end face of first group of second side magnetic conduction arm is concordant along magnet ring thickness direction, the outer rim edge of two groups of second side magnetic conduction arms
Ring axial magnetic alignment, second side magnetic conduction arm magnetism pole orientation along ring axial magnetic alignment is on the contrary, first group of second side magnetic conduction arm
Thickness cover the upper limb of first end magnetizer upper surface to middle arm notch, the thickness covering of second group of second side magnetic conduction arm the
Two ends magnetizer lower surface is to the lower edge of middle arm notch, and there are gaps with magnet ring inner wall for second side magnetic conduction arm.
In this optimal technical scheme, magnetic field at two magnetic poles of magnet is collapsed, magnetic field resource is made to be fully utilized, improved to fortune
The sensitivity of dynamic velocity measuring, while good conductor of the magnetizer as magnetic is held, holding the magnetic induction line of magnet in magnetizer faster
Tend to homogenize, reduce reluctance force.When the magnetic polarity direction of first group of second side magnetic conduction arm and first magnet ring
When identical, the magnetic polarity of corresponding second group of second side magnetic conduction arm will be with the magnetic polarity phase of second magnet ring
Instead, the magnetic field of first group of second side magnetic conduction arm and first magnet ring is from magnetic field north, by the first side in range
The upper arm of magnetic conduction arm and middle arm return to the magnetic field South Pole, and the magnetic induction line in middle arm is almost first magnet ring magnetic field strength and first group
Second side magnetic conduction arm magnetic field strength summation, magnetic induction line direction is from the first side magnetic conduction arm toward the direction of second side magnetic conduction arm；
When movement parts rotation rotates adjacent second side magnetic conduction arm so far, due to the magnetic field pole of second side magnetic conduction arm adjacent in two groups
Property is contrary, i.e., first group of second side magnetic conduction arm magnetism will become contrary with first magnet ring pole polarity, and second group
Second side magnetic conduction arm magnetism will be identical as second magnet ring pole polarity direction, second group of second side magnetic conduction arm will be with second
The magnetic induction line of magnet ring returns to magnetic field south by the lower arm and middle arm of the first side magnetic conduction arm in range together from magnetic field north
Pole, the magnetic induction line in middle arm are almost the total of second side magnetic conduction arm magnetic field strength of second magnet ring magnetic field strength and second group
With, magnetic induction line direction be from second side magnetic conduction arm toward the first side magnetic conduction arm direction, i.e. the direction of magnetic induction line is exactly the opposite, thus
Cause the magnetic flux in induction coil variation be twice magnet ring magnetic field strength and second side magnetic conduction arm magnetic field strength and, from
And the EMF pulse amplitude of induction coil generation is significantly improved, significantly improve the sensitivity to speed of moving parts detection.
Preferably, the detected movement parts are linear motion part；The magnet is straight magnetic stripe extending in a straight line, institute
State normal direction of the pole orientation along straight magnetic stripe extending direction of straight magnetic stripe；First side magnetic conduction arm is arranged along the side of straight magnetic stripe, and first
The both ends of side magnetic conduction arm are coupled with two magnetic poles of straight magnetic stripe respectively, and second side magnetic conduction arm is located at straight magnetic stripe and the first side magnetic conduction arm phase
Pair side, second side magnetic conduction arm by connector with linear motion part connect and with move along a straight line part move；First side magnetic conduction
The both ends of arm cover or partially cover two magnetic poles of straight magnetic stripe, and the both ends of the surface of the first side magnetic conduction arm are the pole orientation with straight magnetic stripe
And the parallel plane of extending direction of straight magnetic stripe, second side magnetic conduction arm is equipped with to be formed uniformly with the end face of the first side magnetic conduction arm
The coupling part in gap.
When the displacement and movement velocity that are applied to the limited linear motion part of motion range detect, by this optimization technique
Scheme can directly obtain the displacement and movement velocity of movement parts, to the precision of displacement detecting by the quantity of the first side magnetic conduction arm
It determines, the detection accuracy of movement velocity is determined by the magnetic field strength and number of inductive coil turns of straight magnetic stripe, but improve to movement speed
The detection accuracy of degree will increase reluctance force, and raising can reduce the precision of displacement detecting because of the increase of the first side magnetic conduction arm quantity
Reluctance force, but the amplitude reduction for the inductive impulse signal that also induction coil can simultaneously generated, increase the difficulty of detection pulse signal
Degree.
Substantial effect of the invention is: by multiple first side magnetic conduction arms and induction coil, make to detect movement parts movement
An induction coil can be at least triggered compared with thin tail sheep and generates induced electromotive force, improve the sensitivity to displacement detecting；It is logical
It crosses with magnetic second magnetic conduction arm, increases magnetic flux change rate in the first side magnetic conduction arm, improve the amplitude of induced electromotive force,
Improve the sensitivity to detection speed；Compact arranged first side magnetic conduction arm is producing the magnetic field of magnet and mutually abutting
Raw strong and weak variation is more dense, intensity difference when magnetic field power alternating is reduced by more dense variation, to reduce reluctance force；It is logical
It crosses and widens second side magnetic conduction arm, generate induction coil between positive pulse and negative pulse there are temporal interval, pulled open two
The time interval of subpulse resistance gives detected movement parts more times and restores the influence of pulse resistance bring, reduces
Reluctance force influences the motion state of detected movement parts.
Detailed description of the invention
Fig. 1 is one magnetic electrical device structural schematic diagram of embodiment.
Fig. 2 is the explosion cross-sectional view of embodiment one.
Fig. 3 is one explosive view of embodiment.
Fig. 4 is one rotor assembly structural schematic diagram of embodiment.
Fig. 5 is the fan ring magnet magnetic pole distribution schematic diagram of one rotor of embodiment.
Fig. 6 is one stator cross-sectional view of embodiment.
Fig. 7,8 are one operation logic schematic diagram of embodiment.
Fig. 9 is one stator core construction schematic diagram of embodiment.
Figure 10 is two magnetic electrical device cross-sectional view of embodiment.
Figure 11 is three structural schematic diagram of embodiment.
Figure 12 is three explosive view of embodiment.
Figure 13 is three second side magnetic conduction arm schematic view of the mounting position of embodiment.
Figure 14 is three schematic diagram of internal structure of embodiment.
Figure 15,16 are three operation logic schematic diagram of embodiment.
Figure 17 is example IV structural schematic diagram.
Figure 18 is five structural schematic diagram of embodiment.
Figure 19,20 are five operation logic schematic diagram of embodiment.
Figure 21 is six schematic view of the mounting position of embodiment.
Figure 22 is six structural schematic diagram of embodiment.
Wherein: 1, upper end cover, 2, upper core, 3, middle iron core, 4, lower core, 5, lower cover, 6, armature spindle, 7, the line of induction
Circle, 8, upper bearing (metal), 9, rotor assembly, 10, upper permanent magnet, 11, lower permanent magnet, 12, lower bearing, 13, fan ring iron core, 14, fan ring
Magnet, 15, upper core ring, 16, lower core ring, 17, barrel connector, 18, fixed plate, 19, second side magnetic conduction arm, 20, first
Side magnetic conduction arm, 21, magnet ring, 22, transmission connection portion, 23, straight magnetic stripe, 24, movement parts, 25, straight rail, 26, connecting rod, 27, on
Hold magnetizer, 28, lower end magnetizer, 29, magnetic conduction cap, 30, upper straight magnetic stripe, 31, lower straight magnetic stripe, 32, connection frame, 33, S-shaped magnetic
Item, 34, S-shaped track, 35, massage head frame, 36, fixed connecting rod, 37, S-shaped end magnetizer.
Specific embodiment
Below by specific embodiment, and in conjunction with attached drawing, a specific embodiment of the invention is further described in detail.
Embodiment one:
A kind of magnetic electrical device of low magnetic resistance, as shown in Figure 1, the present embodiment include upper end cover 1, stator core, upper permanent magnet 10, under
Permanent magnet 11, several induction coils 7, lower cover 5 and rotor assembly 9, rotor assembly 9 include armature spindle 6, and armature spindle 6 is distinguished
It is connect by upper bearing (metal) 8 and lower bearing 12 with upper end cover 1 and lower cover 5.Armature spindle 6 is connect with rotating motion part 24, and with rotation
It transports moving part 24 to rotate, such as elevator drags running wheel, automotive wheel and blast fan.Armature spindle 6 passes through belt, synchronous belt or chain
Item transmission is connect with rotating motion part 24, or is connect using universal joint with rotating motion part 24, or fixed with rotating motion part 24
Connection and itself is served as armature spindle 6 by transhipment moving part 24, and stator core, upper permanent magnet 10 and lower permanent magnet 11 are as fixed
Son, including outside, rotor assembly 9, stator can also be located inside rotation by the present embodiment, and rotor assembly 9 is positioned at outer
The fixed embodiment in side.As shown in figure 9, stator core includes upper core 2, middle iron core 3 and lower core 4, during upper core 2 has
The ring bodies in portion and the L-type magnetic conduction arm uniformly dissipated outward along ring bodies, lower core 4 and upper core 2 have similar shape, in
There is middle part along axial direction to open ring body jaggy and along the column magnetic conduction arm of ring body diverging for iron core 3, along each column magnetic conduction arm
Cover the column magnetic conduction arm number by induction coil 7, the L-type magnetic conduction arm of upper core 2 and the L-type magnetic conduction arm of lower core 4 and middle iron core 3
Amount and position correspond to each other, and are bonded to each other and constitute the first side magnetic conduction arm 20.As shown in Figure 2 and Figure 3, upper permanent magnet 10 and lower permanent magnetism
Body 11 is magnet ring 21, and upper permanent magnet 10 is caught between upper core 2 and middle iron core 3, and lower permanent magnet 11 is caught in lower core 4 and middle iron
Between core 3, the ring bodies at 2 middle part of upper core covers the upper surface of upper permanent magnet 10, under the ring bodies covering at 4 middle part of lower core forever
The lower end surface of magnet 11, the ring body of middle iron core 3 cover the lower end surface of upper permanent magnet 10 and the upper surface of lower permanent magnet 11.Such as Fig. 4
Shown, rotor assembly 9 further includes upper core ring 15, lower core ring 16, several fan ring iron cores 13 and several fan ring magnets 14,
Upper core ring 15 and lower core ring 16 are fixedly mounted on armature spindle 6 with one heart, and the two of upper core ring 15 and upper core ring 15
Side is circumferentially fixed with several fan ring magnets 14, and there are four fan ring magnet 14, four fan rings for every side fixation in the present embodiment
Magnet 14 is uniformly distributed circumferentially, and is had gap each other and is axially aligned along armature spindle 6, upper core ring 15 and lower core ring 16
It is machined with corresponding notch in the gap location, an end face of sector electromagnet is connect with upper core ring 15 or lower core ring 16, fan
Another end face of shape magnet is fixedly connected with fan ring iron core 13, and the shape and fan ring magnet 14 for fanning ring iron core 13 match, upper iron
Core ring 15 and lower core ring 16 and the fan ring magnet 14 fixed respectively thereon and fan ring iron core 13 constitute second side magnetic conduction arm 19.
As shown in figure 5, the pole orientation of fan ring magnet 14 is located at upper core ring 15 or lower core ring 16 is same along the axial direction of armature spindle 6
Adjacent 14 pole orientation of fan ring magnet of side is on the contrary, the fan ring magnet positioned at upper core ring 15 axially aligned along armature spindle 6
14 pole orientation is identical, but opposite positioned at the fan pole orientation of ring magnet 14 of lower core ring 16 with what is axially aligned.Such as Fig. 6
It is shown, the pole orientation of upper permanent magnet 10 and lower permanent magnet 11 along 21 axial direction of magnet ring and pole orientation it is identical.
The operation logic of the present embodiment is as follows: for a selected first side magnetic conduction arm 20, when going to the first side magnetic conduction
When the pole orientation of the fan ring magnet 14 for being located at upper core ring 15 of 20 position of arm is opposite with upper 10 pole orientation of permanent magnet, then position
Will be identical as lower 11 pole orientation of permanent magnet in the pole orientation of the fan ring magnet 14 of upper core ring 15, as shown in Figure 7.Upper iron
The magnetic induction line of the fan ring magnet 14 of the upside of core ring 15 from its arctic, crossed after fan ring iron core 13 the fan ring iron core 13 and
The gap of upper core 2 enters the ring bodies at 2 middle part of upper core, will then enter the South Pole of upper permanent magnet 10, by upper permanent magnet
In the magnetic induction line entrance that 10 arctic is set out after the ring body at 3 middle part of iron core, the fan ring of middle iron core 3 with 15 downside of upper core ring is crossed
Gap between iron core 13 then enters the fan ring magnet 14 ipsilateral with fan ring iron core 13 into the fan ring iron core 13 to drink
The South Pole, the flux path without middle iron core 3 column magnetic conduction arm, i.e., without induction coil 7；The fan ring of 16 downside of lower core ring
The magnetic induction line of magnet 14 crosses the fan ring iron core 13 and lower core 4 from its arctic after the fan ring iron core 13 on the downside of it
Gap enter the ring bodies at the middle part of lower core 4, the magnetic induction line to set out with lower 11 arctic of permanent magnet collect after together by lower iron
The L shape magnetic conduction arm of core 4 enter in iron core 3 column magnetic conduction arm, then enter in iron core 3 middle part ring body, part magnetic induction line into
Enter the South Pole of lower permanent magnet 11, another part magnetic induction line is crossed between the fan ring iron core 13 of 16 upside of middle iron core 3 and lower core ring
Gap then enter the South Pole of the fan ring magnet 14 of the upside of lower core ring 16 into the fan ring iron core 13, on lower core ring 16
The magnetic induction line that 14 arctic of fan ring magnet of side is set out enters the South Pole of the fan ring magnet 14 of the downside of lower core ring 16, in the flux path
The magnetic induction line of the fan ring magnet 14 of 16 two sides of lower permanent magnet 11 and lower core ring passed induction coil in addition to a small amount of scatter and disappear
7, the magnetic induction line direction in induction coil 7 be the outside of middle iron core 3 inwardly.
When go to 20 position of the first side magnetic conduction arm be located at upper core ring 15 fan ring magnet 14 pole orientation with it is upper
When 10 pole orientation of permanent magnet is identical, then the pole orientation positioned at the fan ring magnet 14 of upper core ring 15 will be with lower permanent magnet 11
Pole orientation is on the contrary, as shown in Figure 8.At this point, the fan ring magnet 14 of 16 two sides of lower core ring and lower permanent magnet 11 form small range
Flux path ring, magnetic induction line is not through induction coil 7.15 two sides of upper core ring fan ring magnet 14 magnetic induction line and it is upper forever
The magnetic induction line of magnet 10 has passed through induction coil 7 together, and magnetic induction line direction is that the inside of middle iron core 3 is outwardly directed, and feels in Fig. 7
Answer the direction of magnetic induction line in coil 7 exactly the opposite.Thus when the alternating of selected the first side magnetic conduction arm 20 experience fan ring iron core 13
When, the variation of magnetic flux will occur, to generate induced electromotive force, export induced electromotive force pulse signal, pulse signal
The speed of amplitude and time span reflection detection armature spindle 6.The specific induction coil 7 for generating induced electromotive force pulse signal is then anti-
The angular displacement of armature spindle 6 is reflected, induction coil 7 generates the sequence of induced electromotive force, then reflects the rotation direction of armature spindle 6.
In the present embodiment, the ring body of upper core 2, the ring bodies at 4 middle part of lower core and middle iron core 3 is the good conductor of magnetic,
Have in magnetic induction line wherein and faster tend to uniform trend than free space, it is thus possible to make Distribution of Magnetic Field more evenly, reduce
Because magnetic field strength caused by the first side magnetic conduction arm 20 is uneven, reduce the reluctance force that fan ring magnet 14 encounters.Due to induction coil 7
The variable quantity of interior magnetic flux be upper permanent magnet 10, lower permanent magnet 11,15 two sides of upper core ring fan ring magnet 14 and lower iron
The summation of the magnetic field strength of the fan ring magnet 14 of 16 two sides of core ring.Thus embodiment improves to 6 Rotating speed measring of armature spindle
Sensitivity.Using the lower upper permanent magnet 10 of magnetic field strength, lower permanent magnet 11 and fan ring magnet 14, preferable inspection can be also obtained
Survey sensitivity.The present embodiment depends on the first side magnetic conduction arm 20 and the line of induction for the sensitivity of 6 Angular Displacement Detecting of armature spindle
Circumferential gap between the quantity and fan ring magnet 14 of circle 7.First side 20 quantity of magnetic conduction arm are more, fan the week between ring magnet 14
It is smaller to gap, then it is higher to the detection sensitivity of 6 angular displacement of armature spindle.Extend since the present embodiment has along rotating path
Magnetic field not will cause in the present embodiment when the first side magnetic conduction arm 20 increases, and upper permanent magnet 10 and lower permanent magnet 11 provide edge
The motion path of detected movement parts 24 extends and the lateral diverging to motion path.
Embodiment two:
A kind of magnetic electrical device of low magnetic resistance, the present embodiment are that simplifying for embodiment one is implemented, and as shown in Figure 10, the present embodiment includes
Upper permanent magnet 10, upper core 2, middle iron core 3, several induction coils 7, upper core ring 15, several fan ring magnets 14, several
Fan ring iron core 13 and armature spindle 6, upper permanent magnet 10 are caught between upper core 2 and middle iron core 3, and 7 sets of induction coil outside middle iron core 3
On the column magnetic conduction arm of side diverging, upper core ring 15 is concentrically mounted on armature spindle 6, and 15 two sides of upper core ring are circumferentially uniformly divided
Several fan ring magnets 14 of cloth, fan 14 end face of ring magnet is covered with fan ring iron core 13.The pole orientation of ring magnet 14 is fanned along rotor
Axis 6 is axial, and the pole orientation of adjacent fan ring magnet 14 is on the contrary, fan ring magnet 14 and fan ring iron core 13 and upper core 2, upper permanent magnetism
There are uniform gaps for body 10 and middle iron core 3.The L-type magnetic conduction arm of upper core 2 and the column magnetic conduction arm of middle iron core 3 constitute the first side
Magnetic conduction arm 20.Fan ring magnet 14 and the fan ring iron core 13 covered thereon constitute second side magnetic conduction arm 19.When the first side magnetic conduction arm
When second side magnetic conduction arm 19 of 20 corresponding positions changes, flux path can also change, the fan ring that variable quantity is twice
The magnetic flux of magnet 14, the induced electromotive force generated are exported as signal.In the present embodiment, upper permanent magnet 10 has to be replaced below
For scheme: upper permanent magnet 10 is substituted or directly removed using non-magnetic ring bodies.
Compared to embodiment one, the present embodiment has the advantages that cost is lower, axial dimension is small and implements easier.But phase
Than having the shortcomings that sensitivity is decreased obviously in embodiment one.Thus the present embodiment is suitable for the field not high to sensitivity requirement
It closes.Meanwhile the present embodiment causes permanent magnet 10 to lose the influence to testing result, causes it that can be removed, thus be one
The simplification embodiment of the kind obvious embodiment one of performance degradation.
Embodiment three:
A kind of magnetic electrical device of low magnetic resistance, as shown in figure 11, the present embodiment have barrel connector 17 and fixed plate 18, and tubular connects
Fitting 17 is connect by the transmission connection portion 22 at its center with rotating motion part 24, is rotated with rotating motion part 24.Gu
Fixed board 18 is connect with the fixed structure of rotating motion part 24.As shown in figure 12, the present embodiment includes several along barrel connector
17 be axially distributed second side magnetic conduction arm 19, magnet ring 21, along several compact arranged the first side magnetic conductions of 21 inner ring circumference of magnet ring
Arm 20 and distribution cover several induction coils 7 on the first side magnetic conduction arm 20, magnet ring 21 and the first side magnetic conduction arm 20 and fix
Plate 18 is fixedly connected, and second side magnetic conduction arm 19 is fixedly connected with barrel connector 17 and rotates with rotating motion part 24.
As shown in figure 13, the present embodiment uses four along the equally distributed second side magnetic conduction arm 19 of 17 inner wall of barrel connector.Such as figure
Shown in 14,19 inside of second side magnetic conduction arm has uniform gap with magnet ring 21, and 20 both ends of the first side magnetic conduction arm are located at magnetic
The both ends of magnet ring 21, second side magnetic conduction arm 19 is completely covered in the both ends of ring 21, the both ends of several the first side magnetic conduction arms 20 jointly
The length and first side magnetic conduction arm 20 axial along magnet ring 21 it is essentially identical, span of second side magnetic conduction arm 19 along 21 circumferential direction of magnet ring
Greater than the first side magnetic conduction arm 20.As shown in figure 15, when there is second side magnetic conduction arm 19 in the position of the first side magnetic conduction arm 20, the first side
Magnetic conduction arm 20 and second side magnetic conduction arm 19 collectively form flux path, and the magnetic induction line that the arctic of magnet ring 21 is set out is divided into two-way, respectively
By the first side magnetic conduction arm 20 and second side magnetic conduction arm 19, the South Pole of magnet ring 21 is returned to；As shown in figure 16, when the second of the position
When side magnetic conduction arm 19 leaves, flux path only remaining first side magnetic conduction arm 20, thus whole magnetic induction lines will pass through the first side magnetic conduction arm
20, so that the magnetic flux in the first side magnetic conduction arm 20 is changed, and then induction coil 7 is made to generate induced electromotive force pulse, as
Signal.
The component of rotation is followed in the present embodiment on the outside, including the first side magnetic conduction arm 20 and magnet ring 21 of stator
Side.In the present embodiment, angular velocity of rotation detection sensitivity by second side magnetic conduction arm 19 magnetic permeability, 21 magnetic field strength of magnet ring and sense
7 the number of turns of coil is answered to determine.First side magnetic conduction arm 20 is the good conductor of magnetic, has faster to become than free space in magnetic induction line wherein
In uniform trend, it is thus possible to make Distribution of Magnetic Field more evenly, magnetic field strength caused by reducing because of the first side magnetic conduction arm 20 is uneven
It is even, reduce the reluctance force that fan ring magnet 14 encounters.
The present embodiment also has following alternative solution: one, the second magnetic conduction arm has magnetism, and removes magnet ring 21.Two, second
Magnetic conduction arm dense arrangement, the second adjacent magnetic conduction arm have different magnetic permeabilities, wherein different magnetic permeabilities are in the following way
Realize: adjacent second magnetic conduction arm uses the gap size different from the first magnetic conduction arm；Using different materials；It is magnetic using having
The magnetic field strength of second side magnetic conduction arm 19, adjacent second side magnetic conduction arm 19 is different or pole orientation is different；In the second magnetic conduction arm
Middle part, which is arranged, narrows section, and adjacent second magnetic conduction arm has the narrowed section of different narrowed degree.
Example IV:
A kind of magnetic electrical device of low magnetic resistance, the present embodiment are suitable for detecting the speed and displacement of the movement parts 24 to move along a straight line.
For example it is applied to the beam cranes moved back and forth along straight rail 25.As shown in figure 17, the present embodiment include straight magnetic stripe 23, it is several
A the first side magnetic conduction arm 20 and second side magnetic conduction arm 19 along straight 23 left side dense arrangement of magnetic stripe, the first side magnetic conduction arm 20 is C-shaped,
Induction coil 7 is cased on several the first side magnetic conduction arms 20.The both ends part of first side magnetic conduction arm 20 covers straight magnetic stripe 23, the
Two side magnetic conduction arms 19 are C-shaped, and the both ends of second side magnetic conduction arm 19 and the first side magnetic conduction arm 20 have uniform gap.Second side is led
Magnetic arm 19 is fixedly connected by connecting rod 26 with linear motion part 24, and linear motion part 24 is moved back and forth along straight rail 25.When
When side magnetic conduction arm 20 is coupled with second side magnetic conduction arm 19, the first side magnetic conduction arm 20 is respectively formed magnetic flux with second side magnetic conduction arm 19
Road, the magnetic induction line of corresponding position are divided into two-way from straight 23 arctic of magnetic stripe, pass through the first side magnetic conduction arm 20 and second side respectively
After magnetic conduction arm 19, straight 23 South Pole of magnetic stripe is returned to.When coupling second side magnetic conduction arm 19 with the first side magnetic conduction arm 20 and leaving, magnetic flux
The remaining first side magnetic conduction arm 20 in road, the magnetic induction line of the position passes through the first side magnetic conduction arm 20, thus passes through induction coil 7
Magnetic flux increases, and induction coil 7 is caused to generate induced electromotive force, exports as signal.The amplitude of induced electromotive force reflects straight line
The movement velocity of movement parts 24.The position of the induction coil 7 of induced electromotive force is generated, reflects the position of linear motion part 24, according to
The direction of the secondary induction coil 7 for generating induced electromotive force, the direction of motion of reflection linear motion part 24.The present embodiment examines displacement
The sensitivity of survey depends on the quantity of the first side magnetic conduction arm 20, unrelated with the quantity of second side magnetic conduction arm 19 and size.
If 20 both ends of the first side magnetic conduction arm of the present embodiment all cover straight 23 both ends of magnetic stripe, second side magnetic conduction arm 19 can
To use straight bar shape.Its advantage is the utilization rate increased to straight 23 magnetic field strength of magnetic stripe, reduces second side magnetic conduction arm 19 and moves
The instantaneous reluctance force that direction or movement velocity are subject to when changing.
Embodiment five:
A kind of magnetic electrical device of low magnetic resistance, as shown in figure 18, the present embodiment include several second side magnetic conduction arms 19, connection frame
32, upper straight magnetic stripe 30, lower straight magnetic stripe 31, upper end magnetizer 27, lower end magnetizer 28 and several the first side magnetic conduction arms 20 are upper straight
Magnetic stripe 30 is identical with the pole orientation of lower straight magnetic stripe 31.First side magnetic conduction arm 20 is in E shape, and upper straight magnetic stripe 30 and lower straight magnetic stripe 31 divide
It is not embedded in two notches of the first side magnetic conduction arm 20E shape, the middle part transverse arm of the first side magnetic conduction arm 20E shape is cased with induction coil
7, upper end magnetizer 27 covers upper straight 30 upper surface of magnetic stripe, the lower end surface of straight magnetic stripe 31, the first side under lower end magnetizer 28 covers
The upper surface of middle part transverse arm of magnetic conduction arm 20E shape and cover separately below upper straight magnetic stripe 30 lower end surface and lower straight magnetic stripe 31 it is upper
End face, the middle part transverse arm of the first side magnetic conduction arm 20E shape cover upper straight magnetic stripe 30 and lower 31 part of straight magnetic stripe and are provided with notch along middle part.
7 sets of induction coil between notch and E shape vertical arm.Several second side magnetic conduction arms 19 divide for respectively with upper straight magnetic stripe 30 and lower straight
Magnetic stripe 31 corresponding upper group and the following group, second side magnetic conduction arm 19 are in vertical bar shape.19 both ends of second side magnetic conduction arm are respectively and fixedly provided with magnetic conduction
Cap 29.With group adjacent second side magnetic conduction arm 19 pole orientation on the contrary, second side magnetic conduction arm 19 of consistency from top to bottom magnetic pole side
To opposite.The present embodiment has used four second side magnetic conduction arms 19.Four second side magnetic conduction arms 19 are mutually solid by connection frame 32
Fixed connection, connection frame 32 are fixedly connected with linear motion part 24.
By taking a first side magnetic conduction arm 20 as an example, as shown in figure 19, as two coupled with the first side magnetic conduction arm 20
In two side magnetic conduction arms 19, upper group of 19 magnetic pole of second side magnetic conduction arm is identical as upper magnetic stripe pole orientation, second side magnetic conduction of the following group
19 magnetic pole of arm is opposite with lower magnetic stripe pole orientation.Second side magnetic conduction arm 19 and lower magnetic stripe of the following group form local flux road ring.On
The magnetic induction line that 19 magnetic North of second side magnetic conduction arm of group sets out is after magnetic conduction cap 29 enters upper end magnetizer 27, with upper magnetic stripe
The magnetic induction line that the arctic is set out behind part on the first side magnetic conduction arm 20, into 20 middle part of the first side magnetic conduction arm, passes through sense together
7 rear portion magnetic induction line of coil is answered to return to the magnetic stripe South Pole, residual magnetic induction line passes through upper group of 19 lower end of second side magnetic conduction arm
Magnetic conduction cap 29 returns to the South Pole of second side magnetic conduction arm 19.At this point, be upper magnetic stripe with upper group by the magnetic flux of induction coil 7 the
The sum of two side magnetic conduction arms, 19 magnetic induction line, direction are that the first side magnetic conduction arm 20 is directed toward second side magnetic conduction arm 19.It is led when with first side
Second side magnetic conduction arm 19 that magnetic arm 20 couples due to linear motion part 24 drive and when changing, upper group of second side magnetic conduction arm 19
Magnetic pole and upper magnetic stripe pole orientation are on the contrary, 19 magnetic pole of second side magnetic conduction arm of the following group is identical as lower magnetic stripe pole orientation, such as Figure 20
It is shown.Upper group of second side magnetic conduction arm 19 and upper magnetic stripe form local flux road ring.Second side magnetic conduction arm 19 and lower magnetic of the following group
The magnetic induction line of item makes the magnetic flux in induction coil 7 change by induction coil 7, generates induced electromotive force pulse, as
Signal output.The movement velocity of the amplitude reflection linear motion part 24 of induced electromotive force.Generate the induction coil 7 of induced electromotive force
Position, the position of reflection linear motion part 24 is sequentially generated the direction of the induction coil 7 of induced electromotive force, reflection straight line fortune
The direction of motion of moving part 24.The present embodiment depends on the quantity of the first side magnetic conduction arm 20 to the sensitivity of displacement detecting, with second
The quantity and size of side magnetic conduction arm 19 are unrelated.
Embodiment six:
A kind of magnetic electrical device of low magnetic resistance, the present embodiment is suitable for detecting the movement parts 24 moved along S-shaped track 34, for example is used for
The tracking of the massage head position of S-shaped massage armchair.As shown in figure 21, the present embodiment includes S-shaped magnetic stripe 33, several the first side magnetic conductions
Arm 20,19, four S-shaped end magnetizers 37 of several second side magnetic conduction arms, connection frame 32 and fixed connecting rod 36,35 edge of massage head frame
S-shaped track 34 moves back and forth, and the shape of S-shaped magnetic stripe 33 is identical as S-shaped track 34, and position is that the translation of S-shaped track 34 obtains.If
Dry second side magnetic conduction arm 19 is each attached on connection frame 32, and 19 both ends of second side magnetic conduction arm are respectively and fixedly provided with magnetic conduction cap 29, connection
Frame 32 passes through fixed connecting rod 36 and is fixedly connected with massage head frame 35.As shown in figure 22, the present embodiment has used two consistencies from top to bottom
S-shaped magnetic stripe 33, the pole orientation of S-shaped magnetic stripe 33 is identical.Several the first side magnetic conduction arms 20 are tight along two 33 left sides of S-shaped magnetic stripe
Solid matter column, the first side magnetic conduction arm 20 are in E shape.Two S-shaped magnetic stripes 33 are respectively embedded into two notches of the first side magnetic conduction arm 20E shape
In, four S-shaped end magnetizers 37 are covered each by two 33 upper surfaces of S-shaped magnetic stripe and lower end surface.In first side magnetic conduction arm 20E shape
Portion's transverse arm is cased with induction coil 7.Second side magnetic conduction arm 19 is in vertical bar shaped, several second side magnetic conduction arms 19 are divided to for respectively with two
A 33 position of S-shaped magnetic stripe corresponds to upper and lower two groups.Adjacent 19 pole orientation of second side magnetic conduction arm with group is on the contrary, consistency from top to bottom
Second side magnetic conduction 19 pole orientations of arm are opposite.The present embodiment uses four second side magnetic conduction arms 19, four second side magnetic conduction arms
19 are fixedly mounted on mounting rack.Second side magnetic conduction arm 19 is kept close to the one side of S-shaped magnetic stripe 33 and the side of S-shaped magnetic stripe 33
It is tangent.When second side magnetic conduction arm 19 is mobile with massage head frame 35, can periodically be coupled with the first side magnetic conduction arm 20, and cause
Magnetic flux change in corresponding first side magnetic conduction arm 20, and then induced electromotive force pulse is generated, it is exported as signal.It leads at S-shaped end
Magnet 37 can collapse the magnetic induction line of S-shaped magnetic stripe 33, can make full use of the magnetic field strength of S-shaped magnetic stripe 33.Magnetic conduction cap 29 plays
Improve the effect to 19 magnetic field utilization rate of second side magnetic conduction arm.Sensitivity of the present embodiment for 35 position detection of massage head frame,
Depending on the quantity of the first side magnetic conduction arm 20 and the gap of second side magnetic conduction arm 19.First side 20 quantity of magnetic conduction arm are more, and second
The gap of side magnetic conduction arm 19 is smaller, then higher to the sensitivity of 35 position detection of massage head frame.S-shaped end magnetizer 37 is the good of magnetic
Conductor has in magnetic induction line wherein and faster tends to uniform trend than free space, it is thus possible to make Distribution of Magnetic Field more evenly,
Magnetic field strength is uneven caused by reducing because of the first side magnetic conduction arm 20, reduces the reluctance force that second side magnetic conduction arm 19 encounters.
Above-mentioned embodiment is only a preferred solution of the present invention, not the present invention is made in any form
Limitation, there are also other variations and modifications on the premise of not exceeding the technical scheme recorded in the claims.
Claims (10)
1. a kind of magnetic electrical device of low magnetic resistance, for detecting movement parts, which is characterized in that
Include:
Magnet, for providing magnetic field, the magnetic field extends along the motion path of detected movement parts and to the side of motion path
To diverging；
Several the first side magnetic conduction arms are arranged along magnetic field extending direction, and in the first side of magnetic field extending direction connection magnetic field
Two magnetic poles are used to form the first side flux path；
Second side magnetic conduction arm, connect with movement parts, and moves with movement parts with respect to the first side magnetic conduction arm, in motion process periodically
Coupled with the first side magnetic conduction arm flux path be collectively formed, so that the magnetic flux of the first side magnetic conduction arm is generated cyclically-varying；
Several induction coils cover on the first side magnetic conduction arm, incude magnetic flux change in the first side magnetic conduction arm, export electromotive force
Signal.
2. a kind of magnetic electrical device of low magnetic resistance according to claim 1, which is characterized in that
Second side magnetic conduction arm has magnetism.
3. a kind of magnetic electrical device of low magnetic resistance according to claim 1 or 2, which is characterized in that
It further include two for collapsing the end magnetizer in magnetic field at two magnetic poles of magnet, the first side magnetic conduction arm and second side magnetic conduction
Arm passes through described two end magnetizers and couples with two magnetic poles in magnetic field.
4. a kind of magnetic electrical device of low magnetic resistance according to claim 1 or 2, which is characterized in that
First side magnetic conduction arm both ends is equipped with broadening part, and adjacent broadening part mutually abuts.
5. a kind of magnetic electrical device of low magnetic resistance according to claim 2, which is characterized in that
Second side magnetic conduction arm is greater than the first side magnetic conduction arm along the span of motion path along the span of motion path.
6. a kind of magnetic electrical device of low magnetic resistance according to claim 2 or 5, which is characterized in that
The magnetic electrical device includes two magnets and several second side magnetic conduction arms, several described second side magnetic conduction arms are divided into point
Two groups not be aligned with two magnet, with group, adjacent second side magnetic conduction arm pole orientation is on the contrary, along two magnet line directions
Second side magnetic conduction arm pole orientation of alignment is opposite.
7. a kind of magnetic electrical device of low magnetic resistance according to claim 1, which is characterized in that
The detected movement parts are rotating motion part；
The magnet is magnet ring, and the magnetic pole of the magnet ring is along ring axial magnetic；
First side magnetic conduction arm along magnet ring inner headed face or outer circle EDS maps, the first side magnetic conduction arm both ends respectively with two magnetic pole coupling of magnet ring
It closes, for second side magnetic conduction arm in thickness along the fan ring body of ring axial magnetic, second side magnetic conduction arm is located at magnet ring and the first side magnetic conduction arm phase
Pair side, second side magnetic conduction arm connect with rotating motion part by connector and rotated with rotating motion part, second side magnetic conduction
The rotary shaft and fan ring body central axis of arm are coaxial with magnet ring；
The both ends of first side magnetic conduction arm cover or part covers the both ends of the surface of magnet ring, and first two end faces of side magnetic conduction arm are and magnet ring
Concentric arc surface, second side magnetic conduction arm are equipped with the coupling part that uniform gap is formed with two end faces of the first side magnetic conduction arm.
8. a kind of magnetic electrical device of low magnetic resistance according to claim 7, which is characterized in that
Second side magnetic conduction arm has magnetism, and the magnetic pole of second side magnetic conduction arm is along ring axial magnetic；
The magnetic electrical device includes several second side magnetic conduction arms, rotation of several the described second side magnetic conduction arms along rotating motion part
The circumferential direction for turning center is uniformly distributed, and the both ends of the surface difference of several second side magnetic conduction arms is concordant, adjacent second side magnetic conduction arm
Pole orientation is opposite.
9. a kind of magnetic electrical device of low magnetic resistance according to claim 8, which is characterized in that
The magnetic electrical device includes two magnet rings and two end magnetizers, and described two magnet rings are concentric and pole orientation is identical, institute
State several the first side magnetic conduction arms and be equipped with upper arm, middle arm, lower arm and linking arm, the linking arm connection upper arm, middle arm and
The first end of lower arm, for the line of induction snare on middle arm, first end magnetizer covers the upper surface of first magnet ring,
The lower end surface of first magnet ring is covered by the upper surface of middle arm, and upper arm is connect with first end magnetizer, second end magnetizer
The lower end surface of second magnet ring is covered, the upper surface of second magnet ring is covered by the lower surface of middle arm, and lower arm is led with second end
Magnet connection, the middle arm along magnet ring thickness direction middle part processing it is jagged, the inner wall of described two end magnetic guiding loops and in
The second end face of arm is substantially flush with magnet ring inner wall；
Several described second side magnetic conduction arms are divided into that quantity is two groups identical, and the end face of first group of second side magnetic conduction arm is along magnet ring thickness
Degree direction is concordant, and the outer rim of two groups of second side magnetic conduction arms is aligned along ring axial magnetic, along second side magnetic conduction arm of ring axial magnetic alignment
Magnetic pole orientation is on the contrary, the thickness of first group of second side magnetic conduction arm covers first end magnetizer upper surface to middle arm notch
Upper limb, the thickness of second group of second side magnetic conduction arm cover lower edge of second end magnetizer lower surface to middle arm notch, second side
There are gaps with magnet ring inner wall for magnetic conduction arm.
10. a kind of magnetic electrical device of low magnetic resistance according to claim 1, which is characterized in that
The detected movement parts are linear motion part；
The magnet is straight magnetic stripe extending in a straight line, the normal direction of the pole orientation of the straight magnetic stripe along straight magnetic stripe extending direction；
First side magnetic conduction arm along straight magnetic stripe side arrange, the both ends of the first side magnetic conduction arm respectively with two magnetic pole couplings of straight magnetic stripe
It closes, second side magnetic conduction arm is located at the straight magnetic stripe side opposite with the first side magnetic conduction arm, and second side magnetic conduction arm is by connector and directly
The connection of line movement parts is simultaneously moved with linear motion part；
The both ends of first side magnetic conduction arm cover or part covers two magnetic poles of straight magnetic stripe, the both ends of the surface of the first side magnetic conduction arm be with it is straight
The parallel plane of the extending direction of the pole orientation of magnetic stripe and straight magnetic stripe, second side magnetic conduction arm are equipped with and the first side magnetic conduction arm
End face formed uniform gap coupling part.
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| CN112953248A (en) * | 2021-02-04 | 2021-06-11 | 中国科学院工程热物理研究所 | Step-up transformer, step-up method and step-up circuit |
| WO2023082392A1 (en) * | 2021-11-11 | 2023-05-19 | 深圳市瑞达美磁业有限公司 | Magnetic encoder |
| CN117289008A (en) * | 2023-11-27 | 2023-12-26 | 江苏科兴电器有限公司 | 150kV tunneling giant magneto-resistance direct current sensor |
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