CN209134150U - A kind of permanent magnet and magneto - Google Patents
A kind of permanent magnet and magneto Download PDFInfo
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- CN209134150U CN209134150U CN201821474432.6U CN201821474432U CN209134150U CN 209134150 U CN209134150 U CN 209134150U CN 201821474432 U CN201821474432 U CN 201821474432U CN 209134150 U CN209134150 U CN 209134150U
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- 238000000926 separation method Methods 0.000 claims abstract description 179
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 9
- 230000005389 magnetism Effects 0.000 claims description 7
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 4
- 238000003672 processing method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 229920005596 polymer binder Polymers 0.000 description 2
- 239000002491 polymer binding agent Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 239000000463 material Substances 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
- 238000006396 nitration reaction Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a kind of permanent magnet and magnetoes, one or more separation troughs are formed on the permanent magnet, the separation trough runs through the permanent magnet and on the second extending direction of the separation trough not through permanent magnet on the first extending direction of the separation trough, first extending direction of the separation trough is parallel with the magnetizing direction of the permanent magnet, alternatively, the magnetizing direction of the first extending direction of the separation trough and the permanent magnet has angle.The permanent magnet manufacturing process of the utility model is simple, resistivity is high, it is stable for rotor performance, can be effectively reduced magnetic loss.
Description
Technical field
The utility model belongs to technical field of motors, and in particular to a kind of permanent magnet and magneto.
Background technique
Permanent magnet is the necessary parts in magneto, and motor generates vortex at work, and vortex leads to permanent magnetism temperature
It increases, causes permanent magnet magnetic to be lost, influence motor performance.
In the prior art, there are mainly two types of the approach for reducing permanent magnet magnetic loss: first is that change the macrostructure of permanent magnet,
Insulating polymer is recycled to be bonded magnetic sheet after magnet is divided, which can be effectively reduced magnetic loss, but manufacture work
Sequence is cumbersome, at high cost, and magnet performance is unstable, is unfavorable for assembling after bonding, increases motor oscillating noise；Second is that improving permanent magnet
Resistivity, since eddy-current loss and the resistivity of PM rotor are inversely proportional, improve its resistivity facilitate reduce vortex damage
Consumption.
The method of permanent magnetism body resistivity is improved mainly include the following types: first is that coating insulating layer for Nd-Fe-B permanent magnet；Two
It is that non-metallic atom is dispersed at high temperature in Nd-Fe-B permanent magnet ontology, changes its microcosmic composition；Third is that by neodymium-iron-boron
Powder nitridation forms nitration case on magnetic powder surface.It is limited that the defect of these methods is that the resistivity of permanent magnet improves, and manufactures
Technology difficulty is larger, it is difficult to steady production.
Nd-Fe-B permanent magnet is widely used in magneto, such permanent magnet conductivity with higher and it is lower away from
Lower from temperature Curie temperature, when work, magnetic loss is larger, reduces motor performance.Also, power of motor is higher, permanent magnet body
Product is bigger, and when rotor heat dissipation performance is poor, when work causes higher temperatures liter, and magnetic disappearance is even resulted under extreme case, therefore,
The magnetic loss defect of such material especially attracts people's attention.
Utility model content
In order to improve above-mentioned technical problem, the utility model provides a kind of permanent magnet, one is provided on the permanent magnet
Or multiple separation troughs, the separation trough is on the first extending direction of the separation trough through the permanent magnet and in the separation trough
The second extending direction on not through the permanent magnet, wherein the first extending direction of the separation trough and filling for the permanent magnet
Magnetic direction is parallel, alternatively, the magnetizing direction of the first extending direction of the separation trough and the permanent magnet has angle.
Further, when the separation trough be it is multiple when, the separation trough include the first separation trough and the second separation trough, first
Second extending direction of separation trough and the second extending direction of the second separation trough are opposite.
Further, the permanent magnet is the Nd-Fe-B permanent magnet with a pair of of magnetic pole.
Further, when separation trough is multiple, multiple separation troughs are parallel to each other.
Further, length of the separation trough on its second extending direction is the permanent magnet in second extending direction
Length 50% or more, more preferably 70%-90%.
Further, the width of the separation trough is 0.1mm-0.5mm, and the width refers to the two side walls of the separation trough
The distance between.
Further, when separation trough is multiple, the distance being spaced between two adjacent separation troughs is 1-10mm, preferably 1-
5mm, the distance between described two neighboring separation trough are the width of the permanent magnet between two adjacent separation troughs.
Separation trough as much as possible is arranged on the permanent magnet in embodiment according to the present utility model.For example, all points
Between the width of separate slot and all adjacent separation troughs the summation of the width of permanent magnet can for permanent magnet cross-sectional length 50% with
On, such as 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 99% or 100%.
Further, projection of the separation trough on its first extending direction is curved, such as wavy line shape.
Further, first separation trough and the second separation trough are staggered.
Further, the permanent magnet is in flat cuboid.
Further, the first extending direction of the separation trough is the thickness direction of the permanent magnet, the of the separation trough
The angle of the length direction of two extending directions and the permanent magnet is greater than 0 ° and is less than or equal to 90 °, such as 45 °.
Embodiment according to the present utility model, the thickness direction of the permanent magnet refer to and the permanent magnet minimum side length
The parallel direction in side.
The utility model also provides a kind of motor, and the motor has rotor, and the rotor includes permanent magnetism as described above
One of body.
The utility model has the beneficial effects that
The permanent magnet manufacturing process that the utility model embodiment proposes is simple, resistivity is high, performance is stable, can effectively drop
Low magnetic loss.
Detailed description of the invention
Fig. 1 a is a kind of magnet structure side view that the utility model embodiment 1 proposes；
Fig. 1 b is a kind of magnet structure front view that the utility model embodiment 1 proposes；
Fig. 2 a is another magnet structure side view that the utility model embodiment 1 proposes；
Fig. 2 b is another magnet structure front view that the utility model embodiment 1 proposes；
Fig. 3 a is a kind of magnet structure side view that the utility model embodiment 2 proposes；
Fig. 3 b is a kind of magnet structure front view that the utility model embodiment 2 proposes；
Fig. 4 a is a kind of magnet structure side view that the utility model embodiment 4 proposes；
Fig. 4 b is a kind of magnet structure front view that the utility model embodiment 4 proposes；
Fig. 5 a is a kind of rotor structure schematic diagram for motor that the utility model embodiment 6 proposes；
Fig. 5 b is the rotor structure front view for another motor that the utility model embodiment 6 proposes.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below in conjunction with specific embodiment, and
Referring to attached drawing, the utility model is further described.But as known to those skilled in the art, the utility model is not limited to
Attached drawing and following embodiment.
The utility model embodiment proposes a kind of permanent magnet, which can be used for rotor, is formed on the permanent magnet
There are one or more separation troughs, the separation trough is on the first extending direction of the separation trough through the permanent magnet and at this
Not through permanent magnet, the first extending direction of the separation trough and magnetizing for the permanent magnet on second extending direction of separation trough
Direction is parallel, alternatively, the magnetizing direction of the first extending direction of the separation trough and the permanent magnet has angle.
Preferably, the permanent magnet is the Nd-Fe-B permanent magnet with a pair of of magnetic pole.
The permanent magnet of the utility model embodiment has above-mentioned separation trough, and monolith permanent magnet is not exclusively cut off, still makees
For an entirety, separation trough can effectively improve the resistance of permanent magnet, make permanent magnet as rotor in use, can significantly reduce
Eddy-current loss, also, the processing is simple, when rotor is used for motor, does not influence motor performance.
Embodiment 1
A, Fig. 1 b referring to Fig.1, illustratively, permanent magnet 100 are in flat rectangular body structure comprising parallel opposite first
Surface 11 and second surface 12, and vertical with two surfaces, parallel opposite the first side wall 13 and second sidewall 14；Permanent magnetism
The magnetizing direction of body is to magnetize from first surface to opposite second surface parallel with first surface；One is formed on permanent magnet
Or multiple first separation troughs 10, the first extending direction of the first separation trough 10 are to extend from first surface 11 along magnetizing direction, the
One separation trough runs through second surface 12, and length of first separation trough 10 on first extending direction is equal to permanent magnet first surface
The distance between second surface, the second extending direction of the first separation trough are from the first side wall 13 along vertical with the first side wall
Direction extends to second sidewall 14, and length of first separation trough on second extending direction is less than the first side in this direction
The distance between wall and second sidewall, that is, not through second sidewall.
Preferably, when the first separation trough is multiple, multiple first separation troughs are parallel to each other.
Preferably, when the first separation trough is multiple, equidistant arrangement between multiple first separation troughs.
Preferably, length of first separation trough on the second extending direction is the permanent magnet in the second extension side
To length 50% or more, more preferably 70%-90%.
Preferably, first separates groove width for 0.1-0.5mm.The width refers to the two side walls of first separation trough
The distance between.
Preferably, when the first separation trough is multiple, the distance being spaced between two neighboring first separation trough is 1-10mm,
Preferably 1-5mm.The distance between described two neighboring first separation trough is the permanent magnetism between two neighboring first separation trough
The width of body.
In another embodiment, the first extending direction of the first separation trough can also along with the magnetizing direction be in one
The direction of angle, which tilts, to be extended, and second surface is run through.The structure has the effect of reduced harmonic, when being used as rotor, has
Reduce the effect of eddy-current loss.
In another embodiment, referring to Fig. 2 a, Fig. 2 b, first separation trough is on first extending direction
It projects curved.At this point, multiple first separation troughs are parallel to each other, the tangent line for referring to and putting accordingly between multiple curves is mutual
In parallel.The metering method of spacing between the width of first separation trough and adjacent first separation trough is similar therewith.First separation trough
Linear distance between the both ends that the length on the second extending direction refers to the first separation trough.
Embodiment 2
Referring to Fig. 3 a, Fig. 3 b, the present embodiment the difference from embodiment 1 is that, the permanent magnet of the present embodiment further includes one
Or the first extending direction of multiple second separation trough, 10 ', 10 ' of the second separation trough are to prolong from first surface 11 along magnetizing direction
It stretches, the second separation trough runs through second surface 12, and length of 10 ' of the second separation trough on the extending direction is equal to the first table of permanent magnet
The distance between face and second surface, the second extending direction of the second separation trough are from second sidewall 14 along vertical with second sidewall
Direction extend to the first side wall 13, length of second separation trough on the extending direction is less than the first side wall in this direction
The distance between second sidewall, i.e., not through the first side wall, the second extending direction of the second separation trough and the first separation trough
Second extending direction is opposite.
Preferably, first separation trough and the second separation trough are parallel to each other.
Preferably, first separation trough and the second separation trough are staggered.
Preferably, equidistant arrangement between first separation trough and second separation trough.
Preferably, length of first separation trough on its second extending direction is the permanent magnet in second extension
50% or more of the length in direction, more preferably 70%-90%；Length of second separation trough on its second extending direction
For the permanent magnet the direction length 50% or more, more preferably 70%-90%.
Preferably, the width of first separation trough and second separation trough is 0.1-0.5mm.The width refers to
The distance between two side walls of separation trough.
Preferably, the distance being spaced between two adjacent separation troughs is 1-10mm, preferably 1-5mm.It is described two neighboring
The distance between separation trough is the width of the permanent magnet between two neighboring separation trough.The adjacent separation trough refers to including
All separation troughs including one separation trough and the second separation trough, for example, adjacent separation trough is as adjacent when the two is staggered
The first separation trough and the second separation trough.
In another embodiment, projection of second separation trough on first extending direction is curved.This
When, multiple second separation troughs, which are parallel to each other, refers to that the tangent line put accordingly between multiple curves is parallel to each other.Second separates
The metering method of spacing between the width of slot and adjacent second separation trough is similar therewith.
The separation trough of present embodiment is oppositely arranged in both direction, is had more significant technical effect, is used as
When rotor, the better effect of eddy-current loss is reduced.
Embodiment 3
The present embodiment the difference from embodiment 1 is that, the second extending direction of first separation trough is from the first side wall
Along with the inclined direction of the first side wall (i.e. with the direction of the first side wall out of plumb, the second extending direction of the first separation trough with forever
The angle in magnet length direction is greater than 0 ° and less than 90 °) extend to second sidewall, and the first separation trough is on the extending direction
Length is less than the distance between the first side wall and second sidewall in this direction, that is, not through second sidewall.
In another embodiment, projection of first separation trough on first extending direction is curved.
Embodiment 4
Referring to Fig. 4 a, Fig. 4 b, the present embodiment and the difference of embodiment 3 are that the permanent magnet of the present embodiment further includes one
Or the first extending direction of multiple second separation trough, 10 ', 10 ' of the second separation trough are to prolong from first surface along magnetizing direction
Stretch, run through second surface, length of second separation trough on the extending direction be equal to permanent magnet first surface and second surface it
Between distance, the second extending direction of second separation trough be from second sidewall along with the inclined direction of second sidewall (i.e. with
The direction of second sidewall out of plumb, the second extending direction of the second separation trough and the angle of permanent magnet length direction are greater than 0 ° and small
In 90 °) extend to the first side wall, and length of second separation trough on the extending direction is less than the first side wall in this direction
The distance between second sidewall, that is, not through the first side wall.
Embodiment 5
Permanent magnet is that fan annular (permanent magnet in the rotor of reference Fig. 5 b) or prismatoid etc. are special-shaped forever in the present embodiment
Magnet is formed with one or more first separation troughs on the permanent magnet when permanent magnet is such obform body, and described first point
At least one of separate slot is on the first extending direction of the first separation trough through the permanent magnet and on the second extending direction
Not through permanent magnet, first extending direction is consistent with the magnetizing direction of the permanent magnet, alternatively, first extending direction
There is angle with the magnetizing direction of the permanent magnet.
Embodiment 6
The present embodiment proposes that a kind of motor, the motor have rotor, and the rotor includes one of above-mentioned permanent magnet.
Referring to Fig. 5 a, Fig. 5 b, the rotor includes rotor core 20, and the rotor core has permanent magnet trough 21, described
Permanent magnet 100 is fixed in the permanent magnet trough 21.
Embodiment 7
The present embodiment compares the technical effect of different permanent magnets by the temperature increase after test permanent magnet heating.
Sample: cuboid Nd-Fe-B permanent magnet；Long * wide * is thick: 80mm*40mm*5mm, magnetizing direction are thickness direction.
Unmachined permanent magnet is denoted as A0；
By A0 through-thickness quartering cutting it is the part of four separation, then is bonded and spelled with insulating polymer binder
It connects, is denoted as A10；
A0 through-thickness is used into wire cutting mode, equidistant formation three is vertical with permanent magnet length direction, passes through
Four parts of the separation trough for wearing thickness direction, the permanent magnet separated by separation trough are also impartial, and the length of separation trough is 28mm, slot
Wide 0.1mm, is denoted as A11；
A0 through-thickness is used into wire cutting mode, equidistant formation three is vertical with permanent magnet length direction, passes through
Four parts of the separation trough for wearing thickness direction, the permanent magnet separated by separation trough are also impartial, are located in the middle separation trough and another
Outer two separation troughs are formed from opposite direction, and the length of separation trough is 28mm, and groove width 0.1mm is denoted as A12；
By the nine equal part cutting of A0 through-thickness it is the part of nine separation, then is bonded and spelled with insulating polymer binder
It connects, is denoted as A20；
A0 through-thickness is used into wire cutting mode, equidistant formation eight is vertical with permanent magnet length direction, passes through
Nine parts of the separation trough for wearing thickness direction, the permanent magnet separated by separation trough are also impartial, and the length of separation trough is 28mm, slot
Wide 0.1mm, is denoted as A21；
A0 through-thickness is used into wire cutting mode, equidistant formation eight is vertical with permanent magnet length direction, passes through
Nine parts of the separation trough for wearing thickness direction, the permanent magnet separated by separation trough are also impartial, and adjacent separation trough is from opposite
Direction is formed, and is staggered, and the length of separation trough is 28mm, and groove width 0.1mm is denoted as A22.
Using intermediate-frequency heating furnace, above-mentioned sample is placed in identical position, room temperature is under 20 degrees celsius, and setting is same
Intermediate-frequency heating furnace frequency, temperature, using heat-preservation cotton wrap up magnet, heating after ten minutes, measure magnet heating after temperature, such as
Shown in table 1.
Temperature after the heating of 1 sample of table
| Serial number | Magnet | Magnet temperature (DEG C) after experiment | Temperature rise (DEG C) |
| 1 | A0 | 96.5 | 76.5 |
| 2 | A10 | 48.4 | 28.4 |
| 3 | A11 | 57.7 | 37.7 |
| 4 | A12 | 53.6 | 33.6 |
| 5 | A20 | 39.4 | 19.4 |
| 6 | A21 | 48.8 | 28.8 |
| 7 | A22 | 44.1 | 24,1 |
The above experiment reflects the trend of different permanent magnet sample temperature rises, and temperature rise is higher, and magnet eddy current loss is bigger, installation
Motor performance is poorer afterwards.According to above data it is found that the temperature rise highest of A0 magnet, eddy current loss is maximum, performance after motor of installing
It is worst.Equal part mode is identical, and when processing method difference (A10, A11, A12), the temperature rise being bonded again after complete parttion is minimum, opposite
The sample for forming separation trough is slightly higher, forms the sample highest of separation trough in the same direction；Processing method is identical, (A10 when equal part mode difference
With A20, A11 and A21, A12 is compared with A22), separation trough is more, and temperature rise is lower, and magnet eddy current loss is smaller, electric after installation
Machine performance is better.Although the temperature rise after complete parttion is bonded again is minimum, the process costs are high, complex procedures, and are difficult to fit
Answer special-shaped magnet.
Embodiment 8
The present embodiment compares the technical effect of different permanent magnets by the resistivity of test permanent magnet.
Experimental condition: sample measures the resistivity of each sample with embodiment 8, and every sample measures 3 times, is averaged survey
The resistivity of each magnet is obtained, measured value is as shown in table 2.
The resistivity of 2 sample of table
| Serial number | Magnet | Resistivity (Ω m) |
| 1 | A0 | 0.9 |
| 2 | A10 | 2.4 |
| 3 | A11 | 1.8 |
| 4 | A12 | 2.2 |
| 5 | A20 | 10.6 |
| 6 | A21 | 8.4 |
| 7 | A22 | 9.2 |
The above experiment reflects the resistivity of different permanent magnet samples, and resistivity is lower, and magnet eddy current loss is bigger, installation
Motor performance is poorer afterwards.From the above data, the resistivity for not carrying out the A0 of any processing is 0.9 Ω m, and resistivity is most
Low, eddy current loss is maximum, and performance is worst after motor of installing.Equal part mode is identical, when processing method difference (A10, A11, A12, with
And A20, A21, A22), the resistivity being bonded after complete parttion again is minimum, and the sample that opposite direction forms separation trough is slightly higher, is formed in the same direction
The sample highest of separation trough；Processing method is identical, when equal part mode difference (A10 and A20, A11 and A21, A12 is compared with A22),
Separation trough is more, and resistivity is lower, and magnet eddy current loss is smaller, and motor performance is better after installation.Although complete parttion is bonded again
Resistivity afterwards is minimum, but the process costs are high, complex procedures, and is difficult to adapt to special-shaped magnet.
Embodiment 9
The present embodiment compares the technical effect of different permanent magnets by the resistivity of test permanent magnet.
Sample: cuboid Nd-Fe-B permanent magnet；Long * wide * is thick: 80mm*40mm*5mm, magnetizing direction are thickness direction.
Unmachined permanent magnet is denoted as B0；
B0 through-thickness is used into wire cutting mode, equidistant formation four is vertical with permanent magnet length direction, passes through
Five parts of the separation trough for wearing thickness direction, the permanent magnet separated by separation trough are also impartial, and the length of separation trough is respectively
20mm, 28mm, 36mm, groove width 0.1mm, are denoted as B11, B12, B13 respectively；
B0 through-thickness is used into wire cutting mode, equidistant formation four is vertical with permanent magnet length direction, passes through
Five parts of the separation trough for wearing thickness direction, the permanent magnet separated by separation trough are also impartial, and adjacent separation trough is from opposite
Direction is formed, and the length of separation trough is respectively 20mm, 28mm, 36mm, and groove width 0.1mm is denoted as B21, B22, B23；
B0 through-thickness is used into wire cutting mode, it is equidistant formed four with permanent magnet length direction be in 45 °, pass through
The separation trough of thickness direction is worn, the length of separation trough is 28mm, and groove width 0.1mm is denoted as B32；
B0 through-thickness is used into wire cutting mode, equidistant formation four is vertical with permanent magnet length direction, passes through
The separation trough of thickness direction is worn, the projection of separation trough in a thickness direction is in wavy line shape, straight between the both ends of separation trough
Line length is 28mm, and groove width 0.1mm is denoted as B42.
The resistivity of each sample is measured, every sample measures 3 times, the resistivity for measuring each magnet is averaged, such as 3 institute of table
Show.
The resistivity of 3 sample of table
The above experiment reflects the resistivity of different permanent magnet samples, and resistivity is lower, and magnet eddy current loss is bigger, installation
Motor performance is poorer afterwards.From the above data, when cutting mode is identical (B11, B12, B13 and B21, B22, B23) point
Separate slot length is bigger, and resistivity is higher, and eddy current loss is lower, and motor performance is better after installation；It is identical to separate slot length, separation trough
When shape, angle difference (B12, B32, B42), when separation trough is in wavy line shape, resistivity highest, separation trough and length direction
When in 45 °, take second place, when separation trough is in the same direction, resistivity is minimum.This is because wavy line shape, separation trough and length direction do not hang down
When straight, the function of reduced harmonic can be increased, increase heat dissipation area, eddy current loss is lower.
More than, the embodiments of the present invention is illustrated.But the utility model is not limited to above-mentioned implementation
Mode.Within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done, should be included in
Within the protection scope of the utility model.
Claims (13)
1. a kind of permanent magnet, which is characterized in that be formed with one or more separation troughs on the permanent magnet, the separation trough is at this
Run through the permanent magnet on first extending direction of separation trough and on the second extending direction of the separation trough not through permanent magnetism
First extending direction of body, the separation trough is parallel with the magnetizing direction of the permanent magnet, alternatively, the first of the separation trough prolongs
The magnetizing direction for stretching direction and the permanent magnet has angle.
2. permanent magnet as described in claim 1, which is characterized in that when the separation trough is multiple, the separation trough includes
First separation trough and the second separation trough, the second extending direction phase of the second extending direction and the second separation trough of the first separation trough
Instead.
3. permanent magnet as claimed in claim 1 or 2, which is characterized in that the permanent magnet is the neodymium iron boron with a pair of of magnetic pole
Permanent magnet.
4. permanent magnet as claimed in claim 1 or 2, which is characterized in that throwing of the separation trough on its first extending direction
Shadow is curved.
5. permanent magnet as claimed in claim 1 or 2, which is characterized in that when separation trough is multiple, multiple separation troughs are mutually flat
Row.
6. permanent magnet as claimed in claim 1 or 2, which is characterized in that length of the separation trough on its second extending direction
Spend 50% or more of the length for being the permanent magnet in second extending direction.
7. permanent magnet as claimed in claim 6, which is characterized in that length of the separation trough on its second extending direction is
70%-90% of the permanent magnet in the length of second extending direction.
8. such as claims 1 or 2 or the permanent magnet, which is characterized in that the width of the separation trough is 0.1mm-0.5mm,
The width refers to the distance between the two side walls of the separation trough.
9. permanent magnet as claimed in claim 1 or 2, which is characterized in that when separation trough is multiple, two adjacent separation troughs it
Between the distance that is spaced be 1-10mm, the distance between described two neighboring separation trough is the permanent magnet between two adjacent separation troughs
Width.
10. permanent magnet as claimed in claim 9, which is characterized in that when separation trough is multiple, between two adjacent separation troughs
The distance at interval is 1-5mm.
11. permanent magnet as claimed in claim 2, which is characterized in that first separation trough and the second separation trough are staggered.
12. permanent magnet as claimed in claim 1 or 2, which is characterized in that the permanent magnet is in flat cuboid, described
First extending direction of separation trough is the thickness direction of the permanent magnet, the second extending direction and the permanent magnetism of the separation trough
The angle of the length direction of body is greater than 0 ° and is less than or equal to 90 °.
13. a kind of motor, the motor has rotor, which is characterized in that the rotor includes such as any one of claim 1-12
The permanent magnet.
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| CN201821474432.6U CN209134150U (en) | 2018-09-10 | 2018-09-10 | A kind of permanent magnet and magneto |
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| CN201821474432.6U CN209134150U (en) | 2018-09-10 | 2018-09-10 | A kind of permanent magnet and magneto |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022237809A1 (en) * | 2021-05-11 | 2022-11-17 | 烟台东星磁性材料股份有限公司 | Permanent magnet for low eddy current loss of permanent magnet motor and permanent magnet motor |
-
2018
- 2018-09-10 CN CN201821474432.6U patent/CN209134150U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022237809A1 (en) * | 2021-05-11 | 2022-11-17 | 烟台东星磁性材料股份有限公司 | Permanent magnet for low eddy current loss of permanent magnet motor and permanent magnet motor |
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