CN107910969B - Coreless motor - Google Patents
Coreless motor Download PDFInfo
- Publication number
- CN107910969B CN107910969B CN201711138060.XA CN201711138060A CN107910969B CN 107910969 B CN107910969 B CN 107910969B CN 201711138060 A CN201711138060 A CN 201711138060A CN 107910969 B CN107910969 B CN 107910969B
- Authority
- CN
- China
- Prior art keywords
- coil
- mounting seat
- adhesive
- coreless motor
- retaining ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000000853 adhesive Substances 0.000 claims abstract description 87
- 230000001070 adhesive effect Effects 0.000 claims abstract description 87
- 239000000463 material Substances 0.000 claims description 8
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 6
- 230000005284 excitation Effects 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/47—Air-gap windings, i.e. iron-free windings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The invention discloses a coreless motor, which comprises a coil and a mounting seat used for fixing the coil, wherein a preset gap is formed between the bottom of the coil and the mounting seat, an adhesive is coated in the preset gap to form an adhesive part, and the coil is fixedly connected with the mounting seat through the adhesive part. The adhesive is filled in a preset gap between the bottom of the coil and the mounting seat, the coil is flexibly connected with the mounting seat through the bonding part, the coil, the bonding part and the mounting seat are fixedly connected into a whole, and finally the natural frequency of the coil and the whole mounting seat is changed, so that the natural frequency can avoid the excitation frequency under the specific output rotating speed of the motor and avoid resonance with the excitation frequency, and the vibration of the motor under the specific output rotating speed of the motor is slowed down, and the noise is reduced.
Description
Technical Field
The present invention relates to a motor, and more particularly, to a coreless motor.
Background
In the field of motor technology, a cored motor is common as a conventional motor, and a coil assembly of such a motor has an iron core and a coil wound around the iron core to form windings for different kinds of windings. In addition, a coreless motor is also becoming an increasingly common motor on the market, and unlike a cored motor, the coreless motor does not have an iron core, but has a coil with a plastic film encapsulated. After the coil is electrified, a magnetic field with continuously changed direction, namely a rotating magnetic field, is generated. The coil may be held stationary as a stator or may be rotated as a rotor with respect to the stator in the motor itself.
In the conventional coreless motor, the coil is rigidly fixed to the mount so that the coil is integral with the mount, and generally, both the end of the coil near the mount and the mount are formed with special shapes that fit each other so that the coil is embedded in the mount to be rigidly connected to the mount.
Such coreless motors have the following drawbacks: at a specific output rotation speed of the motor, the coil and the mounting seat vibrate seriously and have obvious amplitude, and even the motor is wholly swayed to be incapable of being used normally, and unpleasant noise is often accompanied.
Disclosure of Invention
The invention aims to solve the technical problems that the motor vibrates seriously and noise is disturbing under the specific output rotating speed of the motor.
In order to solve the technical problems, the invention provides a coreless motor, which comprises a coil and a mounting seat for fixing the coil, wherein a preset gap is formed between the bottom of the coil and the mounting seat, an adhesive is coated in the preset gap to form an adhesive part, and the coil is fixedly connected with the mounting seat through the adhesive part.
Preferably, the predetermined gap is provided along the entire circumference of the coil, and the bonding portion includes at least two bonding posts formed at intervals in a circumferential direction.
Preferably, the coil is formed by arranging a plurality of O-shaped coil units in parallel in the circumferential direction, and one adhesive post is adhered to one O-shaped coil unit.
Preferably, the coil is formed by connecting a plurality of wave-shaped coil units end to end along the circumferential direction, each wave-shaped coil unit comprises a wave trough part close to the mounting seat and a wave crest part far away from the mounting seat, and the bonding part is bonded between the wave trough part of each wave-shaped coil unit and the mounting seat.
Preferably, the coreless motor further comprises a retaining ring which is sleeved on the periphery of the coil and is adhered and fixed with the coil.
Preferably, the adhesive portion is adhered between the retainer ring and the mount.
Preferably, the retaining ring is made of a ferrous material.
Preferably, the retaining ring is fitted around the middle of the coil in the axial direction of the coil, and the upper and lower parts of the coil are exposed from the retaining ring.
Preferably, the coil has a portion bonded from the side by the bonding portion.
Preferably, the height of the predetermined gap is approximately 1/20 of the height of the coil.
The coil is flexibly connected with the mounting seat through the bonding part by filling the adhesive into the preset gap between the coil and the mounting seat, so that the coil, the bonding part and the mounting seat are fixedly connected into a whole, the fixing form of the coil and the mounting seat is changed, the rigidity of the coil and the whole mounting seat is further changed, the natural frequency of the coil and the whole mounting seat is finally changed, and the vibration of the motor under the specific output rotating speed of the motor is slowed down, and the noise is reduced.
Drawings
Fig. 1 is a combined perspective view of a coil and a mounting base of a coreless motor provided by the present invention;
FIG. 2 is a side view of the coil and mount of FIG. 1;
FIG. 3 is a top view of the coil and mount of FIG. 1;
Fig. 4 is a cross-sectional view of the coil and mount of fig. 3 taken along A-A.
Reference numerals illustrate:
100. Coil
200. Mounting base
300. Adhesive column
400. A retaining ring.
Detailed Description
To more clearly illustrate the above objects, features and advantages of the present invention, specific embodiments of the present invention are described in detail in this section with reference to the accompanying drawings. The present invention can be embodied in various forms other than those described in this section, and modifications, variations, and alternatives thereto can be made by those skilled in the art without departing from the spirit of the invention, and therefore the invention is not limited to the specific examples disclosed in this section. The protection scope of the patent of the invention shall be subject to the appended claims.
The invention provides a coreless motor, which is provided with a coil 100 and a mounting seat 200 for fixing the coil 100, wherein the coil 100 and the mounting seat 200 are fixedly connected to form a whole, and when the coil 100 is used as a motor stator, the coil 100 and the mounting seat 200 are kept fixed, and only a magnet rotates.
A predetermined gap is provided between the bottom of the coil 100 and the mount 200, the predetermined gap being provided entirely circumferentially along the circumferential direction of the coil 100.
The predetermined gap is coated with an adhesive to form an adhesive portion, the adhesive portion adheres the coil 100to the mount 200, and the coil 100 and the mount 200 are fixed by the adhesive portion, that is, the coil 100 is not in direct contact with the mount 200, and the adhesive serves to fixedly connect the coil 100 and the mount 200.
The adhesive may be entirely applied to the entire circumference corresponding to the predetermined gap to form a band-shaped adhesive portion, or applied to a plurality of positions spaced apart to form at least two adhesive posts 300.
It should be understood that the adhesive is a glue-like substance having a bonding function, which is common in the prior art. Regardless of how the adhesive is applied, it has approximately the same height as the predetermined gap to form a band-shaped adhesive portion or post 300 having a predetermined height.
In this way, the adhesive is filled in the predetermined gap between the bottom of the coil 100 and the mounting seat 200, the coil 100 is flexibly connected with the mounting seat 200 through the bonding part, so that the coil 100, the bonding part and the mounting seat 200 are fixedly connected into a whole, and finally the natural frequency of the whole of the coil 100 and the mounting seat 200 is changed, so that the natural frequency can avoid the excitation frequency at the specific output rotation speed of the motor and avoid resonance with the excitation frequency, thereby reducing the vibration of the motor at the specific output rotation speed of the motor and reducing noise.
The present invention provides the following two specific embodiments with respect to the bonding form of the adhesive, but the present invention is not limited to the two specific embodiments.
Embodiment one:
The predetermined gap is formed along the entire circumference of the coil 100, and the adhesive is applied to the predetermined gap to form a band-shaped adhesive portion having a predetermined height between the coil 100 and the mount 200, one side of the adhesive portion in the height direction being connected to the coil 100, and the other side being connected to the mount 200.
The band-shaped adhesive portion has different rigidity from those of the coil 100 and the mount 200, and thus the natural frequency of the whole of the coil 100, the adhesive portion, and the mount 200 is significantly changed from that of the whole of the coil 100 and the mount 200 directly formed without using the adhesive portion.
Embodiment two:
The predetermined gap is formed along the entire circumference of the coil 100, and the adhesive is applied at intervals along the circumference of the coil 100 so as to form at least two scattered adhesive posts 300, the adhesive posts 300 should have a small circumferential dimension, and the height of the adhesive posts 300 should be not much different from the circumferential dimension so as to be a block-shaped body, or a bar-shaped body.
At the portion where the adhesive post 300 is not present, the coil 100 and the mount 200 are not in contact with each other with a predetermined gap therebetween and are not adhered by the adhesive, and the adhesive post 300 has a rigidity different from that of both the coil 100 and the mount 200, so that the natural frequency of the whole formed by the coil 100, the adhesive post 300, and the mount 200 is significantly changed from that of the whole formed directly by the coil 100 and the mount 200 without using the adhesive portion.
Different natural frequencies can be obtained by providing adhesives in different bonding forms between the coil 100 and the mount 200. Both the first and second embodiments described above can achieve a change in natural frequency, however, a predetermined gap not filled with adhesive remains between the coil 100 and the mount 200 in the second embodiment, which can achieve a larger change in natural frequency than in the first embodiment.
The respective adhesive posts 300 may be uniformly arranged in the circumferential direction, and the number of the adhesive posts 300 is preferably 5, 6, 7 or 8, or more or less, and the number and arrangement form of the adhesive posts 300 may be adjusted according to the adjustment requirement of the fixed frequency, the shape of the coil 100 itself, and the like.
The present invention also provides two specific embodiments with respect to the overall shape of the adhesive post 300, but the present invention is not limited to the two specific embodiments. The cross-sectional shape referred to hereinafter is the shape that the bond post 300 assumes when the coil 100 is radially sectioned.
Embodiment III:
The adhesive post 300 is filled between the coil 100 and the mount 200, and the cross-sectional dimension of the adhesive post 300 is tapered from a portion between one end of the adhesive post 300 where the coil 100 is adhered and the other end of the adhesive mount 200 toward the both ends, respectively, so that the overall shape of the adhesive post 300 may be olive-shaped or the like.
Embodiment four:
The adhesive post 300 is filled between the coil 100 and the mount 200, and the cross-sectional size of the adhesive post 300 increases from the coil 100 to the mount 200. The other end of the adhesive mounting seat 200 of the adhesive post 300 is larger than the size of one end of the adhesive coil 100 of the adhesive post 300, so that the overall shape of the adhesive post 300 may be a polygonal column or the like.
By applying the adhesive between the coil 100 and the mount 200 in different cross-sectional shapes, different natural frequencies can be obtained, and based on this, the above-described embodiment three and embodiment four can realize different degrees of natural frequency change compared to the coil of the coreless motor of the related art, and the embodiment three phase is larger in natural frequency change than the embodiment four.
The adhesive portion may be formed not only to fill the predetermined gap between the coil 100 and the mount 200, but also to have a portion to be bonded from the side of the adhesive portion from the outer peripheral surface of the coil 100, that is, the outer peripheral surface of the coil 100. Such an adhesive portion can more firmly adhere the coil 100 to the mount 200, and when vibration occurs, a portion of the coil 100 to which the adhesive portion is adhered from the side can receive a larger radial force, effectively alleviating displacement of the coil 100 in the radial direction with respect to the mount 200.
The coil 100 of the present invention may have various constituent forms, and two specific embodiments of the coil 100 are given below, but the present invention is not limited to the two specific embodiments.
Fifth embodiment:
the coil 100 is formed by connecting a plurality of waveform coil units end to end in the circumferential direction. The portion of the wave coil unit, which is close to the mount 200 in the coil axial direction, is a valley portion, and the portion of the wave coil unit, which is far from the mount 200, is a peak portion. The holding ring 400 is fitted around the outer circumference of the coil 100 and is adhered to the coil 100, thereby fixing the respective wave-shaped coil units and maintaining the overall shape of the coil 100.
The adhesive parts are adhered to the trough parts of each wave coil unit, specifically, the belt-shaped adhesive parts are adhered to the trough parts of the wave coils, and the adhesive columns are arranged in one-to-one correspondence with the trough parts.
Example six:
the coil 100 is formed by arranging a plurality of O-shaped coil units in parallel along the circumferential direction, a retaining ring 400 is sleeved on the outer circumference of the coil 100, the retaining ring 400 is sleeved on the outer circumference of the coil 100 and is adhered and fixed with the coil 100, and the effect of fixing each O-shaped coil unit and retaining the overall shape of the coil 100 is achieved.
The retaining ring 400 is sleeved on the middle part of the coil 100, and part of the coil is exposed at the upper part and the lower part, so that the retaining ring 400 not only can maintain the integrity of the coil 100, but also can ensure that the coil 100 has a larger heat dissipation area.
Each of the adhesive posts is adhered to a corresponding one of the O-ring units, specifically, the adhesive posts are adhered to a portion of the O-ring adjacent to the mount in a predetermined gap.
The retaining ring 400 is preferably made of a ferrous material so that the retaining ring 400 can also function to strengthen the magnetic properties and increase the magnetic torque. The ferrous material refers to a pure iron material or a material with a high iron content. Of course, the retaining ring 400 could also be made of a non-metallic material, which would not have the effect of the ferrous material described above but would still have the effect of securing the coil 100.
The adhesive portion is directly adhered to the holding ring 400 without adhering to the coil 100, specifically, the adhesive post 300 is adhered between the holding ring 400 and the mount 200, and the adhesive post 300 is adhered to the portion of the holding ring 400 corresponding to the O-shaped coil unit in one-to-one correspondence with the O-shaped coil unit, but neither the portion of the coil 100 corresponding to the adhesive post 300 nor the portion offset from the adhesive post 300 is in contact with the mount 200.
Applicants have found that the gap between the junction of adjacent two O-ring units and the mount 200 is large, and that staggering this portion from the bond post 300 helps to achieve a fixed frequency change more effectively.
In addition, in the case of having the adhesive post 300, the adhesive post 300 may not correspond to the O-shaped coil units one by one, for example, the same number as the O-shaped coil units, or may not adhere to a portion of the holding ring 400 corresponding to the O-shaped coil units, but adhere to a portion of the holding ring 400 corresponding to a junction of two adjacent O-shaped coil units.
The thickness of the holding ring 400 may be set to be larger than the thickness of the coil, and the adhesive post 300 is coated on the entire thickness of the holding ring 400 (the thickness of the portion of the adhesive post 300 bonded to the holding ring 400 is equal to the thickness of the holding ring 400), which is advantageous in improving the bonding firmness.
It should be understood that the various embodiments may be arbitrarily combined for different composition forms of the coil 100, different bonding forms of the adhesive, different shapes of the bonding portions.
In the present invention, the height of the coil assembly is 1/20 of the height of the coil under the most appropriate condition for the waveform coil in the first embodiment. The height of the predetermined gap of the O-shaped coil in the above-described embodiment six is preferably approximately 1/20 of the height of the coil formed by arranging the O-shaped coil units (i.e., the height of the coil 100).
It should be appreciated that the height of the bond post 300 is not too small or too large, if too small, the effect of adjusting the natural frequency is limited, and if too large, the integrity of the coil 100 and the mount 200 is not favored.
It should be appreciated that the height of the bond post 300 is not desirably too small or too large, too stiff resonance is prone to excessive, and too stiff coil 100 and mount 200 are too stiff to maintain product configuration.
In another embodiment, the mount 200 also has grooves, which may be correspondingly annular or spaced apart at several locations, which grooves should be formed directly under the coil 100 in any case, for a wave coil, the grooves being formed directly against the bottom of the wave coil, and for a coil 100 with a retaining ring 400, the grooves are formed directly against the bottom of the retaining ring 400. When in coating, the adhesive is filled in the groove so as to obtain a firmer connection.
In the coreless motor provided by the invention, the coil 100 and the mounting seat 200 are connected into a whole, the whole has a specific natural frequency, when the motor outputs a rotating speed at a certain frequency, a specific exciting frequency is generated, and the natural frequency of the coil 100 and the whole mounting seat 200 is changed, so that when the original natural frequency is the same as the exciting frequency, the new natural frequency is staggered from the exciting frequency, thereby avoiding resonance and reducing vibration and noise.
The motor provided by the invention can be used in a plurality of fields such as advanced manufacturing and automation, aerospace, new energy, energy conservation and the like.
The above embodiments may be arbitrarily combined without departing from the spirit of the invention. For brevity, descriptions of parts are omitted herein, however, the parts should be understood as being capable of implementation using the prior art.
Claims (16)
1. The coreless motor comprises a coil and a mounting seat for fixing the coil, and is characterized in that a preset gap is arranged between the bottom of the coil and the mounting seat in the axial direction of the coil, an adhesive is coated in the preset gap to form an adhesive part, the coil and the mounting seat are directly connected with the adhesive part, so that the coil is fixedly connected with the mounting seat through the adhesive part,
The coil is formed by arranging a plurality of O-shaped coil units in parallel along the circumferential direction, and the bonding part comprises at least two bonding posts formed at intervals along the circumferential direction, and one bonding post is bonded to one O-shaped coil unit.
2. The coreless motor of claim 1, wherein the predetermined gap is disposed along the entire circumference of the coil.
3. The coreless motor of claim 1 or 2, further comprising a retaining ring that is fitted around the outer circumference of the coil and adhesively secured to the coil.
4. A coreless motor as claimed in claim 3, wherein the adhesive is adhered between the retaining ring and the mount.
5. A coreless motor as claimed in claim 3, wherein the retaining ring is made of a ferrous material.
6. A coreless motor as claimed in claim 3, wherein the retaining ring is fitted around a central portion of the coil in an axial direction of the coil, and upper and lower portions of the coil are exposed from the retaining ring.
7. The coreless motor of claim 1 or 2, wherein the coil has a portion bonded from the side by the bonding portion.
8. A coreless motor as claimed in claim 1 or 2, wherein the height of the predetermined gap is approximately 1/20 of the height of the coil.
9. The coreless motor comprises a coil and a mounting seat for fixing the coil, and is characterized in that a preset gap is arranged between the bottom of the coil and the mounting seat in the axial direction of the coil, an adhesive is coated in the preset gap to form an adhesive part, the coil and the mounting seat are directly connected with the adhesive part, so that the coil is fixedly connected with the mounting seat through the adhesive part,
The coil is formed by connecting a plurality of waveform coil units end to end along the circumferential direction, each waveform coil unit comprises a trough part close to the mounting seat and a crest part far away from the mounting seat, and the bonding part is bonded between the trough part of each waveform coil unit and the mounting seat.
10. The coreless motor of claim 9, wherein the predetermined gap is disposed along the entire circumference of the coil, and the bonding portion includes at least two bonding posts formed at intervals in a circumferential direction.
11. The coreless motor of claim 9 or 10, further comprising a retaining ring that is sleeved around the outer circumference of the coil and adhesively secured to the coil.
12. The coreless motor of claim 11, wherein the bond is bonded between the retaining ring and the mount.
13. The coreless motor of claim 11, wherein the retaining ring is made of a ferrous material.
14. The coreless motor of claim 11, wherein the retainer ring is fitted around a central portion of the coil in an axial direction of the coil, and upper and lower portions of the coil are exposed from the retainer ring.
15. The coreless motor of claim 9 or 10, wherein the coil has a portion bonded from the side by the bonding portion.
16. The coreless motor of claim 9 or 10, wherein the height of the predetermined gap is approximately 1/20 of the height of the coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711138060.XA CN107910969B (en) | 2017-11-16 | 2017-11-16 | Coreless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711138060.XA CN107910969B (en) | 2017-11-16 | 2017-11-16 | Coreless motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107910969A CN107910969A (en) | 2018-04-13 |
| CN107910969B true CN107910969B (en) | 2024-06-14 |
Family
ID=61844432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711138060.XA Active CN107910969B (en) | 2017-11-16 | 2017-11-16 | Coreless motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107910969B (en) |
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Also Published As
| Publication number | Publication date |
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| CN107910969A (en) | 2018-04-13 |
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