CN112005466A - Motor with a stator having a stator core - Google Patents
Motor with a stator having a stator core Download PDFInfo
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- CN112005466A CN112005466A CN201980025856.5A CN201980025856A CN112005466A CN 112005466 A CN112005466 A CN 112005466A CN 201980025856 A CN201980025856 A CN 201980025856A CN 112005466 A CN112005466 A CN 112005466A
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- rotor
- magnetic thin
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 66
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 51
- 229910052742 iron Inorganic materials 0.000 claims description 22
- 229910045601 alloy Inorganic materials 0.000 abstract description 6
- 239000000956 alloy Substances 0.000 abstract description 6
- 229910000831 Steel Inorganic materials 0.000 description 23
- 238000012937 correction Methods 0.000 description 23
- 239000010959 steel Substances 0.000 description 23
- 230000000052 comparative effect Effects 0.000 description 17
- 230000004907 flux Effects 0.000 description 16
- 230000000694 effects Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 7
- 229910000976 Electrical steel Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
Abstract
A core and a stator are used, wherein in a laminated body of an alloy ribbon sandwiched by laminated bodies of a plurality of reinforcing plates, at least a part of the reinforcing plates is smaller in size than the laminated bodies of the alloy ribbon. In addition, a motor including a core and a stator is used, and the motor is characterized in that the core or the stator is used, and a gap between the laminated body of the alloy ribbon and the rotor is smaller than a gap between the reinforcing plate and the rotor in a gap formed between the rotor and the stator.
Description
Technical Field
The present invention relates to a motor. And more particularly to a motor using a stator and a rotor.
Background
As a laminate of magnetic plates of a conventional iron core (stator) for a motor, pure iron or electromagnetic steel plates are used. Further, among motors aiming for higher efficiency, there is a motor using a ribbon having amorphous or nano-crystalline grains as an iron core (for example, patent document 1). Generally, a ribbon having amorphous or nano-crystalline grains is used for the purpose of high efficiency of a motor because its iron loss is reduced to a fraction of that of an electrical steel sheet.
Fig. 6 is a perspective view of the divided core described in patent document 1. The plurality of divided cores can be circumferentially combined to form a core. The projecting teeth 34 are located on the inside.
A laminate obtained by laminating and caulking electromagnetic steel plates 31 and a laminate obtained by laminating and adhering a plurality of amorphous thin strips 32 with an adhesive are laminated and fixed by the adhesive.
In fig. 6, the size of the stacked body of the magnetic steel sheets 31 is made larger than the size of the stacked body of the amorphous ribbon 32, so that local stress is not applied from the magnetic steel sheets 31 having higher rigidity than the amorphous ribbon 32. The reason for this is that, for example, in the vicinity of the surface 33 where the amorphous ribbon 32 and the electromagnetic steel sheet 31 are in contact, when the corners and edges of the electromagnetic steel sheet 31 are in contact with the amorphous ribbon 32, bending or cracking occurs in the amorphous ribbon 32, which causes a decrease in motor efficiency.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2014-155347
Disclosure of Invention
However, in the structure of fig. 6, the following problem arises because the size of the stacked body of the electromagnetic steel sheets 31 is larger than the size of the stacked body of the amorphous ribbon 32.
Fig. 7 is a sectional view of a conventional motor. The electromagnetic steel sheet 31 is closer to the rotor 35 than the amorphous thin strip 32. This facilitates the flow of magnetic flux from rotor 35 from magnetic steel sheet 31 into magnetic steel sheet 31. There is a problem that the iron loss at the electromagnetic steel sheet 31 increases and the motor efficiency decreases.
The present invention has been made to solve the above conventional problems, and an object thereof is to provide a motor in which a laminated body of magnetic thin strips is used without reducing the efficiency of the motor.
Means for solving the problems
In order to achieve the above object, a motor is used, which includes: a stator having teeth; and a rotor that is rotated by the stator, wherein the stator is a laminated body of a magnetic ribbon and a reinforcing plate, and the magnetic ribbon is larger than the reinforcing plate in a plan view.
According to the motor of the present invention, it is possible to reduce an increase in iron loss and a decrease in motor efficiency, and to improve lamination accuracy of the laminated body and reduce variations in motor efficiency.
Drawings
Fig. 1A is a side view of a motor using a core according to the first embodiment.
Fig. 1B is a plan view of a motor using a core according to the first embodiment.
Fig. 1C is an enlarged view of a tooth portion of a motor using an iron core according to the first embodiment.
Fig. 2A is a sectional view between a-a' in fig. 1A and a sectional view of the correction jig.
Fig. 2B is a sectional view of a first comparative example and a sectional view of a correction jig.
Fig. 2C is a sectional view of the motor according to the first embodiment.
Fig. 3A is an enlarged view of a tooth of a motor using an iron core according to a second embodiment.
Fig. 3B is a diagram illustrating a circumferential length of the teeth according to the second embodiment.
Fig. 4A is a side view of a motor using a core according to a fourth embodiment.
Fig. 4B is a plan view of a motor using a core according to a fourth embodiment.
Fig. 4C is an enlarged view of a tooth portion of a motor using an iron core according to a fourth embodiment.
Fig. 4D is an enlarged view of a tooth portion of a motor using an iron core according to a fourth embodiment.
Fig. 5A is a diagram illustrating a distance between tooth tip portions generated by reducing the outer diameter of the electromagnetic steel sheet according to the fourth embodiment.
Fig. 5B is a diagram illustrating the distance between the tooth tip portions generated by reducing the outer diameter of the electromagnetic steel sheet in the comparative example.
Fig. 6 is a perspective view of a conventional core segment disclosed in patent document 1.
Fig. 7 is a sectional view of the conventional motor disclosed in patent document 1.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(embodiment I)
Fig. 1A is a side view of a motor using a stator 11 and a rotor 6 as cores according to a first embodiment of the present invention. Fig. 1B is a plan view of fig. 1A.
< Structure >
The motor has a stator 11 and a rotor 6 rotated by the stator 11.
The stator 11 is a laminated body of a plurality of magnetic thin strips 1 and a reinforcing plate 3. The stator 11 has projecting teeth 4 on the inside. The coil is wound around the teeth 4, but omitted.
The magnetic thin strip 1 is an amorphous thin strip and is very thin, generally 15 to 50 μm in thickness. The magnetic thin strip 1 is laminated into a laminated body 2. In order to maintain the shape and size of the stacked body 2, electromagnetic steel sheets as the reinforcing plates 3 are provided so as to sandwich the stacked body 2 from above and below. The reinforcing plate 3 is provided with substantially 1 to 10 pieces on the upper and lower sides of the laminated body 2, respectively. The reinforcing plate 3 is required at least one of the upper and lower sides of the laminated body 2. Fig. 1A shows a case where the reinforcing plate 3 is 1 piece in the upper and lower directions. The reinforcing plate 3 may be a laminate of a plurality of plates.
Fig. 1B shows a positional relationship among the teeth 4 of the stator 11, the tooth tip 5, and the rotor 6. The tooth tip 5 represents a portion of a T-shaped crossbar.
Fig. 1C is an enlarged view of the tooth tip portion 5 shown in fig. 1B. The dotted line indicates an arc of a first circle 21 having an inner diameter on the stator 11 side closest to the outer diameter of the rotor 6 (not shown) and an arc of a second circle 22 connecting the tips of the teeth 4 of the reinforcing plate 3.
As shown in fig. 1C, the dimension of the tooth tip 5a of the lamination body of the reinforcing plate 3 is reduced by a distance H in a direction away from the outer diameter of the rotor 6, as compared with the tooth tip 5b of the lamination body 2 of the magnetic ribbon 1. That is, the depth J of the tooth tip portion 5 is reduced.
As a result, the magnetic ribbon 1 is made larger than the reinforcing plate 3 in a plan view. Specifically, the magnetic thin strip 1 of the stator 11 located on the teeth 4 is larger than the reinforcing plate 3 located on the teeth 4 in a plan view.
< effects >
With such a configuration, a larger amount of magnetic flux flowing between the rotor 6 and the stator 11 can be made to flow into the magnetic thin strip 1, as compared with the first comparative example of fig. 7. That is, the magnetic flux flowing into the reinforcing plate 3 can be reduced, and a large amount of magnetic flux can be caused to flow into the magnetic thin strip 1 having a lower core loss than the reinforcing plate 3. Therefore, the total iron loss at the stator 11 can be reduced.
The core loss of the reinforcing plate 3 is higher than that of the magnetic thin strip 1. Alternatively, the reinforcing plate 3 has a lower electrical resistance than the magnetic ribbon 1.
With this configuration, the iron loss of the stator 11 can be reduced, and the motor efficiency can be increased by + 0.35% as compared with the comparative example. Here, the efficiency (efficiency) of the motor is a ratio of mechanical output to input power expressed as a percentage (percentage).
As an enlarged sample evaluation, 10 motors were produced to evaluate the variation in motor efficiency. As a result, while 3 σ of the motor efficiency was 0.23% in the first comparative example (fig. 7), 3 σ of the motor efficiency in the first embodiment of the present invention was 0.10%. As a result, the deviation can be reduced to 1/2 degrees. In fig. 6, a magnetic ribbon 1 and a reinforcing plate 3 are used in a first comparative example.
[ Table 1]
< mechanism >
The reason why the variation can be reduced in this manner will be described below. Fig. 2A shows the inner diameter correction jig 7 in the process of stacking the stator 11 with the inner diameter correction jig 7 in the cross section at a-a in fig. 1B where the rotor 6 is removed. Fig. 2B is a cross-sectional view of the motor of the first comparative example corresponding to fig. 2A.
As shown in fig. 2A and 2B, when the magnetic thin strip 1 and the reinforcing plate 3 (electromagnetic steel plate) are stacked to form the stator 11 having a desired thickness, the magnetic thin strip is dimensionally corrected by the inner diameter correction portion 8 of the inner diameter correction jig 7 so as to be in contact with the tooth tip portion 5 that determines the inner diameter dimension of the stator 11.
However, in the first comparative example, as shown in fig. 2B, the tooth tip portions 5a of the stacked body of the reinforcing plates 3 are in contact with the inner diameter correction unit 8 before the inner diameter correction unit 8. As a result, the laminated body 2 of the magnetic ribbon 1 does not contact the inner diameter correction unit 8 in the design dimension. Therefore, a gap T is generated between the inner diameter correction unit 8 and the tooth tip end portion 5 of the laminated body 2 of the magnetic strip 1. Since the stacking deviation by the amount of the gap T is randomly generated, the inner diameter size of the stator 11 and the verticality of the inner diameter are unstable, which becomes an important factor of the deviation of the motor efficiency.
On the other hand, in the embodiment, as shown in fig. 2A, the tooth tip portions 5b of the laminated body of the magnetic thin strip 1 can be stacked while being firmly contacted with the inner diameter correction portion 8 of the inner diameter correction jig 7. Therefore, it is considered that the accuracy of the inner diameter dimension of the stator 11 and the perpendicularity of the inner diameter can be improved, and the variation in the motor efficiency can be reduced.
In the inner diameter correction jig 7, the rotation correction unit 9 is provided so as to contact the tooth tip portions 5b of the magnetic thin strip 1 and the reinforcing plate 3 when the stator 11 is laminated, and thereby the stacking deviation in the rotation direction of the magnetic thin strip 1 and the reinforcing plate is reduced.
As a result, as shown in the side view of the motor according to the first embodiment of fig. 2C, the second gap 5d between the magnetic thin strip 1 and the rotor 6 is smaller than the first gap 5C between the reinforcing plate 3 and the rotor 6. The second circle 22 connecting the inner ends of the reinforcing plates 3 is larger than the first circle 21 connecting the inner ends of the magnetic thin strips 1.
(second embodiment) modification of the tooth tip portion 5
Fig. 3A shows an enlarged view of the tooth tip portion 5 in the second embodiment. The items not described are the same as those in the first embodiment.
Fig. 3A is a diagram corresponding to fig. 1C. Fig. 3A is different from fig. 1C in that the dimension of the stacked body of the reinforcing plates 3 is smaller than the dimension of the stacked body of the magnetic ribbon 1 by the dimension of the width K of the teeth 4 and the width M of the tooth tip 5.
< effects >
With this configuration, a larger amount of magnetic flux flowing between the rotor 6 and the stator 11 can be made to flow into the laminated body of the magnetic thin strips 1, as compared with the first comparative example. That is, the magnetic flux flowing into the laminated body of the electromagnetic steel sheets serving as the reinforcing plate 3 can be reduced, and a large amount of magnetic flux can be caused to flow into the amorphous strip of the magnetic strip 1 having a lower iron loss than the electromagnetic steel sheets of the reinforcing plate 3, so that the total iron loss at the stator 11 can be reduced.
With this configuration, the iron loss of the stator 11 can be reduced, and the motor efficiency can be increased by + 0.37% as compared with the comparative example.
Note that the motor efficiency is improved as compared with the first embodiment, but this is considered to be because the iron loss at the laminated body of the reinforcing plate 3 can be reduced by the width M of the tooth tip portion 5.
That is, the effect of increasing the motor efficiency by reducing the size of the stacked body of the reinforcing plates 3 can be obtained not only by reducing the tooth tip end portions 5a of the stacked body of the reinforcing plates 3 in the direction away from the outer diameter of the rotor but also by reducing the size of the tooth tip end portions 5a of the stacked body of the reinforcing plates 3 in the width direction.
Fig. 3B is a modification of fig. 3A. In fig. 3B, the width V of the tooth tip portion 5a is shorter than the width W of the tooth tip portion 5 a. This reduces the iron loss of the stator 11, and improves the motor efficiency.
As a result of evaluating the variation in the motor efficiency by making 10 motors as an extensive sample evaluation, the motor efficiency of the second embodiment of the present invention was 0.08% at 3 σ, and the variation could be reduced to about 1/3.
The reason why the variation in the motor efficiency can be reduced more than in the first embodiment is considered to be that the inner diameter correction portion 8 can be brought into contact with the side surfaces of the teeth 4 in addition to the inner diameter correction jig 7, and the stacking accuracy in the rotation direction of the stator 11 can be improved.
(third embodiment) Nano magnetic body
In the third embodiment, in addition to the first or second embodiment, the magnetic ribbon 1 is configured by a nanocrystalline ribbon instead of an amorphous ribbon. Otherwise, the same as in the first or second embodiment.
The nanocrystalline ribbon is a ribbon obtained by heat-treating the magnetic ribbon 1 used in the present embodiment to crystallize the magnetic ribbon. In order to produce an aggregate of nanocrystals by suppressing the grain growth of crystal grains, it is necessary to control the composition of the material and the conditions of the heat treatment.
With such a configuration, a larger amount of magnetic flux flowing between the rotor 6 and the stator 11 can be made to flow into the stacked body 2 of the nanocrystalline thin strips, as compared with the first comparative example. That is, the magnetic flux flowing into the reinforcing plate 3 can be reduced. As a result, since a large amount of magnetic flux is caused to flow into the nanocrystalline thin strip having a lower iron loss than the reinforcing plate 3, the total iron loss at the stator can be reduced.
With this configuration, the iron loss of the stator 11 can be reduced, and the motor efficiency can be increased by + 0.39% as compared with the comparative example.
The motor efficiency is improved compared to the embodiment, but this is considered to be due to: since the iron loss of the nanocrystalline thin strip is lower than that of the amorphous thin strip, the magnetic flux can be reduced to flow into a material having a lower iron loss by reducing the magnetic flux flowing into the reinforcing plate 3.
As a result of evaluating the variation in the motor efficiency by making 10 motors as an enlarged sample evaluation, the 3 σ of the motor efficiency of the third embodiment was 0.08%, and the variation could be reduced to about 1/3.
(fourth embodiment) outer rotor type
Fig. 4A is a side view of a motor using a stator 11 as an iron core according to a fourth embodiment of the present invention. Fig. 4B is a top view of fig. 4A. Fig. 4C shows an enlarged view of the tooth tip portion 5.
While the first and second embodiments show examples of an inner rotor type motor, the present embodiment shows an example of an outer rotor type motor.
The thickness of the magnetic thin strip 1 as the alloy thin strip of fig. 4A is very thin, substantially 15 to 50 μm. Therefore, in order to form a laminated body 2 made of the magnetic thin strips 1 and maintain the shape and size thereof, substantially 1 to 10 electromagnetic steel sheets are provided as the reinforcing plates 3 on the upper and lower sides of the laminated body 2 of the magnetic thin strips 1, respectively, so as to be sandwiched from the upper and lower directions. The reinforcing plate 3 may be provided on at least one of the upper and lower sides of the stacked body 2. The reinforcing plate 3 may be a laminate of thin plates. Fig. 4A shows a case where the reinforcing plate 3 is 1 piece in the upper and lower sides.
Fig. 4B shows a positional relationship among the teeth 4 of the stator 11, the tooth tip 5, and the rotor 6.
Fig. 4C and 4D show enlarged views of the tooth tip portion 5. The dotted line indicates an arc of a third circle 23 of the outer diameter of the reinforcing plate 3 on the stator 11 side closest to the inner diameter of the rotor (not shown) and an arc of a fourth circle 24 that is an outer circle of the tip of the tooth tip 5 of the magnetic thin strip 1.
As shown in fig. 4C, the dimension of the tooth tip 5a of the reinforcing plate 3 is reduced by a distance P in a direction away from the inner diameter of the rotor 6, as compared with the tooth tip 5b of the laminated body of the magnetic ribbon 1. That is, the depth Q of the tooth tip portion 5a is reduced.
Further, the size of the reinforcing plate 3 is reduced by the width L of the teeth 4 and the width N of the tooth tip 5, as compared with the laminated body 2 of the magnetic ribbon 1.
As a result, the third circle 23 connecting the outer ends of the reinforcing plates 3 is smaller than the fourth circle 24 connecting the outer ends of the magnetic thin strips 1.
< effects >
With such a configuration, compared to the second comparative example (in the first comparative example, a motor in which the rotor 6 and the stator 11 are positioned opposite to each other and the reinforcing plate 3 protrudes toward the rotor 6 from the magnetic ribbon 1 below the reinforcing plate), a large amount of magnetic flux flowing between the rotor 6 and the stator 11 can be caused to flow into the stacked body 2 of the magnetic ribbon 1. That is, the magnetic flux flowing into the reinforcing plate 3 can be reduced, and a large amount of magnetic flux can be caused to flow into the magnetic thin strip 1 having a lower iron loss than the reinforcing plate 3, so that the total iron loss at the stator can be reduced.
With this configuration, the iron loss of the stator can be reduced, and the motor efficiency can be increased by + 0.32% as compared with the comparative example two.
As a result of evaluating the variation in the motor efficiency by making 10 motors as an extensive sample evaluation, the outer rotor type motor as the second comparative example had a motor efficiency of 3 σ of 0.2%, but the motor efficiency of the first embodiment of the present invention had a motor efficiency of 3 σ of 0.09%, and thus the variation could be reduced to about 1/2.
[ Table 2]
< mechanism >
The reason why the variation can be reduced in this way is considered to be the same as that described in the first to third embodiments, and it is considered that since the tooth tip portions 5b of the laminated body of the magnetic thin strip 1 can be stacked while being firmly contacted with an outer diameter correction jig (not shown) of the stator, the accuracy of the outer diameter dimension of the stator and the perpendicularity of the outer diameter can be improved, and the variation in the motor efficiency can be reduced.
When the outer rotor type stator is stacked, a correction jig similar to the inner diameter correction jig 7 shown in fig. 2A is used, but unlike the inner rotor type, an outer shape correction jig (not shown) that is brought into contact with the outer diameters of the amorphous ribbon and the electromagnetic steel sheet to perform correction is used.
In addition, similarly to the configuration shown in the first embodiment, in the case where the configuration shown in fig. 4D is configured in the motor of the inner rotor type, the motor efficiency can be improved and the variation in the motor efficiency can be reduced in the same manner as in the first to fourth embodiments.
In the embodiments of the present invention, only the case where the alloy ribbon is an amorphous ribbon or a nanocrystalline is exemplified, but the same effect can be obtained as long as the alloy ribbon is a magnetic material having a very small thickness of substantially 15 to 50 μm. In particular, it was confirmed that the same effect as that of the present invention can be obtained even when an amorphous ribbon and a nanocrystalline ribbon are mixed to form a laminate.
In the embodiments of the present invention, only the case where the reinforcing plate is an electromagnetic steel plate is exemplified, but similar effects can be obtained even with other materials. In particular, the effect of reducing the variation in motor efficiency is independent of the material, and the effect of improving the motor efficiency can be obtained as much as the effect of the present invention if the material has a higher iron loss than the amorphous ribbon and the nanocrystalline ribbon.
In the embodiment of the present invention, the distance R of the tooth tip portion generated by reducing the outer diameter dimension of the electromagnetic steel sheet of the reinforcing plate 3 is preferably substantially 15% or more of S with respect to the second gap 5d between the rotor and the stator as shown in fig. 5A, and is preferably 0.075mm or more, for example, if the second gap 5d is 0.5 mm. From the results of the magnetic field analysis, it is found that, particularly in the case of a material such that the iron loss is reduced by half compared to the electrical steel sheet of the reinforcing plate 3, such as the magnetic ribbon 1 (amorphous ribbon and nanocrystalline ribbon), the magnetic flux density flowing into the electrical steel sheet can be reduced only by changing the gap S by about 15%. Note that R is a difference in size between the reinforcing plate 3 and the magnetic thin strip 1 at the tip of the tooth.
Preferably, the distance R is substantially smaller than the maximum depth U of the tooth tip portion 5 a. This is because, when the distance R is larger than the depth U, there is no member for reinforcing the tooth tip portion 5a from above and below, and the tooth tip portion 5a is easily broken when operating as a motor. Therefore, it is preferable to make the distance R substantially 5 d.times.15% R.ltoreq.U.
The depth U is the width of the magnetic thin strip 1 at the tooth tip 5 b.
In the embodiment of the present invention, as the effect thereof, the improvement of the motor efficiency and the reduction of the variation in the motor efficiency can be achieved. However, since the electrical steel sheet as the reinforcing plate 3 is reduced in outer diameter, there is a surface on which the mechanical strength of the magnetic ribbon 1 (amorphous ribbon or nanocrystalline ribbon) is likely to be reduced.
In contrast, the space factor of the magnetic thin strip 1 (amorphous thin strip or nanocrystalline thin strip) is preferably increased to substantially 90% or more with respect to the stator 11. Further, by increasing the space factor to substantially 90%, the rigidity of the laminated body of the magnetic ribbon 1 can be increased, and the mechanical strength can be maintained. For example, fig. 5B shows a comparative example of a structure in which U ≦ R is not preferable from the viewpoint of mechanical strength.
(as a whole)
Embodiments one to three may be partially combined.
The reinforcing plate 3 may be made of other electromagnetic materials instead of the electromagnetic steel plate.
Industrial applicability
The motor of the present invention can be applied to motors having various configurations, such as an inner rotor type motor and an outer rotor type motor. In addition to motors, the present invention can also be applied to electronic components using magnetism, such as transformers and power chokes.
Description of reference numerals:
1 magnetic thin strip
2 laminated body
3 reinforcing plate
4 teeth
5 tooth front end
5a tooth tip
5b tooth tip
5c first gap
5d second gap
6 rotor
7 inner diameter correction clamp
8 inner diameter correction device
9 rotating correcting part
11 stator
21 first circle
22 second circle
31 electromagnetic steel sheet
32 amorphous thin strip
33 noodles
34 tooth
35 rotor
P, H distance
Depth of J penetration
Width of K
Width of L
Width of M
N width
Depth of Q
Distance R
T gap
Depth of U
Width of V
W width.
Claims (11)
1. A motor, wherein,
the motor includes:
a stator having teeth; and
a rotor rotated by the stator,
the stator is a laminated body of a magnetic thin strip and a reinforcing plate,
the magnetic thin strip is larger than the reinforcing plate in a plan view.
2. The motor of claim 1,
the magnetic thin strip of the teeth of the stator is larger than the reinforcing plate of the teeth in a top view.
3. The motor according to claim 1 or 2,
the second gap between the magnetic thin strip and the rotor is smaller than the first gap between the reinforcing plate and the rotor.
4. The motor according to any one of claims 1 to 3,
the rotor is located inside the stator,
a first circle connecting the inner ends of the reinforcing plates is larger than a second circle connecting the inner ends of the magnetic thin strips.
5. The motor according to any one of claims 1 to 3,
the rotor is located outside the stator,
a third circle connecting outer ends of the reinforcing plates is smaller than a fourth circle connecting outer ends of the magnetic thin strips.
6. The motor according to any one of claims 1 to 5,
the magnetic thin strip is amorphous or nanocrystalline.
7. The motor according to any one of claims 1 to 6,
the reinforcing plate has a higher iron loss than the magnetic thin strip.
8. The motor according to any one of claims 1 to 5,
the reinforcing plate has a lower electrical resistance than the magnetic ribbon.
9. The motor according to any one of claims 1 to 8,
the duty factor of the magnetic thin strip of the stator is 90% or more.
10. The motor according to any one of claims 2 to 9,
the gap between the rotor and the stator is set to 5d,
when the difference in size between the reinforcing plate at the tip of the tooth and the magnetic thin strip is set to R,
r is more than 15% of 5 d.
11. The motor according to any one of claims 2 to 9,
the difference in size between the reinforcing plate at the tip of the tooth and the magnetic thin strip is set to R,
when the depth of the magnetic thin strip at the front end of the tooth is set to be U,
u is more than R.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-115818 | 2018-06-19 | ||
| JP2018115818 | 2018-06-19 | ||
| PCT/JP2019/017410 WO2019244478A1 (en) | 2018-06-19 | 2019-04-24 | Motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112005466A true CN112005466A (en) | 2020-11-27 |
Family
ID=68984048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980025856.5A Pending CN112005466A (en) | 2018-06-19 | 2019-04-24 | Motor with a stator having a stator core |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2019244478A1 (en) |
| CN (1) | CN112005466A (en) |
| WO (1) | WO2019244478A1 (en) |
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| JP2007329986A (en) * | 2006-06-06 | 2007-12-20 | Toshiba Mitsubishi-Electric Industrial System Corp | Rotor of rotary electric machine |
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- 2019-04-24 WO PCT/JP2019/017410 patent/WO2019244478A1/en active Application Filing
- 2019-04-24 CN CN201980025856.5A patent/CN112005466A/en active Pending
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| JP2009284650A (en) * | 2008-05-22 | 2009-12-03 | Mitsubishi Electric Corp | Magnetogenerator |
| JP2010115069A (en) * | 2008-11-10 | 2010-05-20 | Hitachi Industrial Equipment Systems Co Ltd | Armature core, motor using the armature core and manufacturing method thereof |
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| JP2014155347A (en) * | 2013-02-08 | 2014-08-25 | Mitsubishi Electric Corp | Split core, stator employing the split core and rotary electric machine with the stator |
| CN108155730A (en) * | 2016-12-06 | 2018-06-12 | 松下电器产业株式会社 | Iron core and motor |
| JP2018093704A (en) * | 2016-12-06 | 2018-06-14 | パナソニック株式会社 | Iron core and motor |
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|---|---|
| WO2019244478A1 (en) | 2019-12-26 |
| JPWO2019244478A1 (en) | 2021-06-24 |
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