CN111102292A - Magnetic suspension bearing assembly, outer rotor motor assembly and motor - Google Patents
Magnetic suspension bearing assembly, outer rotor motor assembly and motor Download PDFInfo
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- CN111102292A CN111102292A CN202010035511.2A CN202010035511A CN111102292A CN 111102292 A CN111102292 A CN 111102292A CN 202010035511 A CN202010035511 A CN 202010035511A CN 111102292 A CN111102292 A CN 111102292A
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- 239000000725 suspension Substances 0.000 title abstract description 34
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 25
- 239000011800 void material Substances 0.000 claims description 9
- 238000005339 levitation Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 230000005672 electromagnetic field Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
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- 238000003475 lamination Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0459—Details of the magnetic circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/0489—Active magnetic bearings for rotary movement with active support of five degrees of freedom, e.g. two radial magnetic bearings combined with an axial bearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/0493—Active magnetic bearings for rotary movement integrated in an electrodynamic machine, e.g. self-bearing motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention provides a magnetic suspension bearing assembly, an outer rotor motor assembly and a motor, relates to the technical field of motors, and solves the technical problems that an existing magnetic suspension motor is large in size at least in the axial direction and is not suitable for occasions with small space and large inertia. The magnetic suspension bearing assembly comprises a central shaft assembly and a rotor assembly; the central shaft assembly is provided with a containing gap, at least a part of the rotor assembly is arranged in the gap, and the central shaft assembly can provide electromagnetic force to the rotor assembly to keep the rotor assembly suspended and at least limit the axial and radial displacement of the rotor assembly. The outer rotor motor assembly comprises a motor stator assembly and a magnetic suspension bearing assembly. The motor comprises a motor body and an outer rotor motor component. The invention provides a magnetic suspension bearing assembly, an outer rotor motor assembly and a motor, which have compact structure and can reduce the size of the whole motor on the premise of ensuring the rotational inertia.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a magnetic suspension bearing assembly, an outer rotor motor assembly with the magnetic suspension bearing assembly and a motor with the outer rotor motor assembly.
Background
The magnetic suspension bearing is a low-loss and high-performance bearing, wherein a rotating shaft (also called as a rotor) in a motor is suspended by the electromagnetic force of the magnetic suspension bearing, so that the rotating shaft and the bearing are not in mechanical contact and have no mechanical friction. The high-speed rotation of the motor rotor is realized, and the magnetic suspension motor rotor has the advantages of no mechanical abrasion, low energy consumption, low noise, long service life, no lubrication and sealing, no oil pollution and the like, and the rotation speed of the magnetic suspension motor rotor is only limited by the tensile strength of a rotor material, so that the peripheral speed of the magnetic suspension motor rotor can be very high, and the magnetic suspension motor rotor is more and more widely applied to high-speed equipment.
The external rotor motor is opposite to the general motor, the rotor is outside, and the stator is inside. The rotor has the advantages of large rotational inertia, good heat dissipation, capability of directly connecting the rotor with the load of copper wires, fan blades and the like, and capability of meeting the installation requirement of a small-volume complete machine with certain power. The diameter of the armature core can be made larger, so that the efficiency and the output power of the motor under the unstable load are improved. However, the applicant has found that the magnetic levitation motors of the prior art are generally provided with at least two radial magnetic bearings and a pair of axial magnetic bearings for radially and axially positioning the rotor, and the stator and the rotor of the motor, resulting in a large overall size, at least in the axial direction.
Disclosure of Invention
The invention aims to provide a magnetic suspension bearing assembly, an outer rotor motor assembly provided with the magnetic suspension bearing assembly and a motor provided with the outer rotor motor assembly, and aims to solve the technical problems that the magnetic suspension motor in the prior art is large in axial size at least and is not suitable for occasions with small space and large inertia. The technical effects that can be produced by the preferred technical scheme in the technical schemes of the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a magnetic suspension bearing assembly, which comprises a central shaft assembly and a rotor assembly; wherein,
the central shaft assembly has a receiving void in which at least a portion of the rotor assembly is disposed, the central shaft assembly being capable of providing an electromagnetic force to the rotor assembly to keep the rotor assembly suspended and at least being capable of limiting displacement of the rotor assembly in both an axial direction and a radial direction thereof.
In a preferred or alternative embodiment, the rotor assembly includes a rotor and a thrust disc, the thrust disc is fixedly connected with the rotor, the rotor is sleeved outside at least a partial section of the central shaft assembly, and at least a partial section of the thrust disc is arranged in a gap in the central shaft assembly.
In a preferred or alternative embodiment, the central shaft assembly includes an axial positioning assembly and a radial positioning assembly, and the thrust disc includes an axial positioning portion disposed in a void in the axial positioning assembly and a radial positioning portion disposed in a void between the axial positioning assembly and the radial positioning assembly.
In a preferred or optional embodiment, the central shaft assembly further comprises an installation shaft, the axial positioning assembly comprises a first axial iron core and a second axial iron core, the first axial iron core and the second axial iron core are sleeved and fixedly installed on the installation shaft, the first axial iron core and the second axial iron core are arranged along the axial direction of the installation shaft at intervals, and the axial positioning portion of the thrust disc is arranged in a gap between the first axial iron core and the second axial iron core.
In a preferred or alternative embodiment, the first and second axial cores have axial windings wound around regions thereof adjacent to the axial locating portions to provide an axial electromagnetic force to the rotor assembly.
In a preferred or alternative embodiment, the axial windings provided in the first and second axial cores are wound in the circumferential direction of the mounting shaft.
In a preferred or optional embodiment, the central shaft assembly further includes an installation shaft, the axial positioning assembly is fixedly installed on the installation shaft, the radial positioning assembly includes a radial iron core, the radial iron core is sleeved and fixed on the installation shaft, a gap exists between the radial iron core and the axial positioning assembly along the radial direction of the installation shaft, and the radial positioning portion of the thrust disc is arranged in the gap between the radial iron core and the axial positioning assembly.
In a preferred or alternative embodiment, radial windings wound within the radial cores provide a radial electromagnetic force to the rotor assembly.
In a preferred or alternative embodiment, radial windings provided in the radial core are wound in the axial direction of the mounting shaft.
In a preferred or alternative embodiment, the central shaft assembly further comprises a mounting shaft and a housing, the mounting shaft being fixedly connected to the housing.
The outer rotor motor assembly provided by the invention comprises a motor stator assembly and a magnetic suspension bearing assembly provided by any technical scheme of the invention; wherein,
the motor stator assembly is fixedly connected with the central shaft assembly, the rotor assembly comprises a rotor and a thrust disc, the thrust disc is fixedly connected with the rotor, and the rotor is sleeved outside the motor stator assembly.
In a preferred or alternative embodiment, the motor stator assembly includes a stator core fixedly connected to the central shaft assembly, and a stator winding wound in the stator core along an axial direction of the central shaft assembly.
The motor provided by the invention comprises a motor body and the outer rotor motor component provided by any technical scheme of the invention.
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:
the magnetic suspension bearing assembly provided by the invention comprises a central shaft assembly and a rotor assembly, wherein at least part of the rotor assembly is arranged in a gap in the central shaft assembly, and the central shaft assembly can provide electromagnetic force for the rotor assembly to keep the rotor assembly suspended, so that the rotor assembly is ensured to have no mechanical wear in the rotating process, the energy consumption is lower, and the noise is smaller; the central shaft assembly provides electromagnetic force for the rotor assembly and can limit the axial and radial displacement of the rotor assembly, at least two radial magnetic bearings and a pair of axial magnetic bearings in the prior art are integrated on one magnetic suspension bearing assembly, under the condition of ensuring required inertia, at least the axial size is greatly saved, the structure is more compact, and the magnetic suspension bearing assembly is more conveniently applied to motors with narrow space and large inertia.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structural view of an outer rotor motor assembly provided by the present invention;
FIG. 2 is a schematic cross-sectional view of an outer rotor motor assembly according to the present invention;
FIG. 3 is a schematic diagram of the electromagnetic circuit of the motor and the electromagnetic circuit of the radial positioning assembly shown in FIG. 2;
FIG. 4 is an enlarged partial schematic view of FIG. 3;
FIG. 5 is a schematic view of the electromagnetic circuit of the axial positioning assembly shown in FIG. 2.
In the figure, 1, a central shaft assembly; 11. an axial positioning assembly; 111. a first axial core; 112. a second axial core; 113. an axial winding; 12. a radial positioning assembly; 121. a radial iron core; 122. a radial winding; 13. installing a shaft; 14. a housing; 15. an axial air gap; 16. a radial air gap; 2. a rotor assembly; 21. a rotor; 22. a thrust disc; 221. an axial positioning part; 222. a radial positioning section; 3. a motor stator assembly; 31. a stator core; 32. a stator winding; 4. the motor air gap.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The invention provides a magnetic suspension bearing assembly, an outer rotor motor assembly provided with the magnetic suspension bearing assembly and a motor provided with the outer rotor motor assembly, wherein the magnetic suspension bearing assembly has a compact structure and can reduce the axial size of the whole motor on the premise of ensuring the rotational inertia.
The technical solution provided by the present invention is explained in more detail with reference to fig. 1 to 5.
As shown in fig. 1 to 5, the magnetic suspension bearing assembly provided by the present invention comprises a central shaft assembly 1 and a rotor assembly 2; wherein,
the central shaft assembly 1 has a receiving space in which at least a portion of the rotor assembly 2 is disposed, and the central shaft assembly 1 can provide electromagnetic force to the rotor assembly 2 to keep the rotor assembly 2 suspended and can at least limit the axial and radial displacement of the rotor assembly 2.
The magnetic suspension bearing assembly provided by the invention comprises a central shaft assembly 1 and a rotor assembly 2, wherein at least part of the rotor assembly 2 is arranged in a gap in the central shaft assembly 1, and the central shaft assembly 1 can provide electromagnetic force for the rotor assembly 2 to keep the rotor assembly 2 suspended, so that the rotor assembly 2 can be ensured to have no mechanical wear in the rotating process, the energy consumption is low, and the noise is small; the electromagnetic force provided by the central shaft assembly 1 to the rotor assembly 2 can limit the axial and radial displacement of the rotor assembly 2, at least two radial magnetic bearings and a pair of axial magnetic bearings in the prior art are integrated on one magnetic suspension bearing assembly, under the condition of ensuring the required inertia, the axial size is greatly saved, the structure is more compact, and the magnetic suspension bearing assembly is more conveniently applied to a motor with narrow space and large inertia.
In a preferred or alternative embodiment, the rotor assembly 2 includes a rotor 21 and a thrust disk 22, the thrust disk 22 is fixedly connected to the rotor 21, the rotor 21 is sleeved on at least a part of the central shaft assembly 1, and at least a part of the thrust disk 22 is disposed in a gap in the central shaft assembly 1.
Specifically, thrust disk 22 and rotor 21 may be fixed by welding or bolting, and due to the fixed connection between rotor 21 and thrust disk 22, at least a portion of thrust disk 22 is disposed in a gap of central shaft assembly 1, and central shaft assembly 1 may provide electromagnetic force to thrust disk 22, so as to levitate thrust disk 22 and limit axial and radial displacement thereof, thereby levitating rotor 21 and limiting axial and radial displacement of rotor 21.
As a preferred or alternative embodiment, central shaft assembly 1 comprises an axial positioning assembly 11 and a radial positioning assembly 12, thrust disc 22 comprises an axial positioning portion 221 and a radial positioning portion 222, axial positioning portion 221 being disposed in a void in axial positioning assembly 11, and radial positioning portion 222 being disposed in a void between axial positioning assembly 11 and radial positioning assembly 12.
Specifically, the axial positioning portion 221 is disposed in a gap in the axial positioning assembly 11, the axial positioning assembly 11 provides an axial electromagnetic force to the axial positioning portion 221, and the axial positioning portion 221 is a stressed portion of the rotor assembly 2 in the axial direction, so that the rotor assembly 2 is suspended in the axial direction and axial positioning is achieved; the radial positioning portion 222 is disposed in a gap between the axial positioning assembly 11 and the radial positioning assembly 12, the radial positioning assembly 12 provides a radial electromagnetic force to the radial positioning portion 222, and the radial positioning portion 222 is a radially stressed portion of the rotor assembly 2, so that the rotor assembly 2 suspends in the radial direction and performs radial positioning, and the suspending function and the radial and axial positioning functions are integrated on one thrust disc 22, thereby greatly reducing the volume of the magnetic suspension bearing assembly.
As a preferred or alternative embodiment, the central shaft assembly 1 further includes a mounting shaft 13, the axial positioning assembly 11 includes a first axial core 111 and a second axial core 112, the first axial core 111 and the second axial core 112 are both sleeved and fixedly mounted on the mounting shaft 13 and are arranged at intervals along the axial direction of the mounting shaft 13, and the axial positioning portion 221 of the thrust disk 22 is arranged in a gap between the first axial core 111 and the second axial core 112.
As a preferred or alternative embodiment, the winding of the axial winding 113 in the first axial core 111 and the second axial core 112 near the axial positioning portion 221 can provide an axial electromagnetic force to the rotor assembly 2.
Specifically, the first axial core 111 and the second axial core 112 are both made of soft magnetic material with strong magnetic permeability, such as 45 # steel, and the first axial core 111, the second axial core 112 and the mounting shaft 13 are connected in an interference fit manner; the first axial core 111 and the second axial core 112 are arranged at intervals along the axial direction of the mounting shaft 13, the axial positioning portion 221 is arranged in a gap between the first axial core 111 and the second axial core 112, and the axial winding 113 is wound in the first axial core 111 and the second axial core 112, as shown in fig. 5, after current is supplied, a magnetic flux loop is formed by an electromagnetic field among the first axial core 111, the second axial core 112, the axial air gap 15 and the thrust disc 22, and electromagnetic force can be provided for the axial positioning portion 221; at this time, the directions of the currents flowing into the axial windings 113 in the first axial core 111 and the second axial core 112 are opposite, so that opposite electromagnetic forces can be generated, and the magnitudes of the currents in the different axial windings 113 are adjusted to suspend the axial positioning portion 221 in the gap between the first axial core 111 and the second axial core 112, so that axial suspension and positioning are realized, and the positioning accuracy is higher by using the electromagnetic forces for positioning.
As a preferred or alternative embodiment, the axial windings 113 provided in the first axial core 111 and the second axial core 112 are wound in the circumferential direction of the mounting shaft 13.
As a preferred or alternative embodiment, the central shaft assembly 1 further includes a mounting shaft 13, the axial positioning assembly 11 is fixedly mounted on the mounting shaft 13, the radial positioning assembly 12 includes a radial iron core 121, the radial iron core 121 is sleeved and fixed on the mounting shaft 13, a gap exists between the radial iron core 121 and the axial positioning assembly 11 along the radial direction of the mounting shaft 13, and the radial positioning portion 222 of the thrust disk 22 is disposed in the gap between the radial iron core 121 and the axial positioning assembly 11.
As a preferred or alternative embodiment, radial windings 122 wound within radial core 121 provide a radial electromagnetic force to rotor assembly 2.
Specifically, the radial iron core 121 is composed of silicon steel sheet laminations with strong magnetic permeability, and the adoption of the lamination mode is favorable for reducing eddy current loss and improving efficiency, and the radial iron core is connected with the mounting shaft 13 in an interference fit manner; as shown in fig. 3-4, after current is applied, a magnetic flux loop is formed by an electromagnetic field between the radial iron core 121, the radial air gap 16 and the thrust disc 22, and a radial electromagnetic force is generated on the radial positioning portion 222, so that the radial positioning portion 222 is suspended in a gap between the radial iron core 121 and the axial positioning assembly 11, thereby achieving radial suspension and positioning.
As a preferred or alternative embodiment, the radial windings 122 provided in the radial core 121 are wound in the axial direction of the mounting shaft 13.
Specifically, the axial winding 113 and the radial winding 122 are wound by enameled wires.
As a preferred or alternative embodiment, the central shaft assembly 1 further comprises a mounting shaft 13 and a housing 14, the mounting shaft 13 being fixedly connected with the housing 14.
Specifically, the mounting shaft 13 is connected with the casing 14 in an interference fit manner, and the mounting shaft plays a basic fixing role; rotor 21 is shell-shaped structure, and casing 14 can cover the oral area at rotor 21, with axial positioning subassembly 11 and radial positioning subassembly 12 cladding in the space that forms in it, rotor 21 both can play the output shaft effect, can protect inside spare part simultaneously, has further realized integrating, makes the structure compacter, has reduced the size.
The outer rotor motor component provided by the invention comprises a motor stator component 3 and a magnetic suspension bearing component provided by any technical scheme of the invention; wherein,
motor stator module 3 and central axis subassembly 1 fixed connection, rotor module 2 includes rotor 21 and thrust dish 22, thrust dish 22 and rotor 21 fixed connection, and motor stator module 3 is established outward to rotor 21 cover.
Specifically, the rotor 21 is suspended at the periphery of the motor stator assembly 3, and the motor stator assembly 3 provides a rotating magnetic field; the rotor 21 is arranged at the periphery of the stator component 3 of the motor, the magnetic poles are arranged at the periphery, and compared with an inner rotor motor, the magnetic poles at the periphery have larger area under the same volume, and the output electromagnetic force is larger and the power is relatively larger under the condition of the same current; the rotor 21 is arranged on the periphery, and the radius of the rotor 21 is larger, and the rotation radius and the inertia are larger under the condition of the same mass.
As a preferred or alternative embodiment, the motor stator assembly 3 includes a stator core 31 and a stator winding 32, the stator core 31 is fixedly connected to the central shaft assembly 1, and the stator winding 32 is wound in the stator core 31 along the axial direction of the central shaft assembly 1.
Specifically, the stator core 31 is formed by laminating silicon wafers with strong magnetic permeability, and the adoption of the lamination mode is favorable for reducing eddy current loss and improving the efficiency; the stator winding 32 is formed by winding an enameled wire, and is wound in the stator core 31 to provide a rotating electromagnetic field. In addition, because rotor 21 sets up in motor stator subassembly 3 periphery, for inner rotor motor, under the equal volume, this area of periphery is big, and when the equal electromagnetic force of output, required enameled wire is less relatively to can save the enameled wire.
As shown in fig. 3-4, after the current is applied, the electromagnetic field forms a magnetic flux loop of the motor among the stator core 31, the motor air gap 4, and the rotor 21, so that the rotor 21 performs a rotational motion in a circumferential direction.
The motor provided by the invention comprises a motor body and the outer rotor motor component provided by any technical scheme of the invention.
Specifically, the casing 14 in the outer rotor motor set may be a rear casing of the motor, and the rotor 21 may be directly used as an output shaft and connected to loads such as fan blades.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connection (such as riveting and welding), of course, the mutual fixed connection can also be an integral structure (for example, the mutual fixed connection is manufactured by casting and integral forming instead (except that the integral forming process can not be adopted obviously).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated. Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (13)
1. A magnetic bearing assembly, comprising a central shaft assembly and a rotor assembly; wherein,
the central shaft assembly has a receiving void in which at least a portion of the rotor assembly is disposed, the central shaft assembly being capable of providing an electromagnetic force to the rotor assembly to keep the rotor assembly suspended and at least being capable of limiting displacement of the rotor assembly in both an axial direction and a radial direction thereof.
2. The magnetic bearing assembly of claim 1, wherein the rotor assembly includes a rotor and a thrust disc, the thrust disc being fixedly coupled to the rotor, the rotor being disposed over at least a portion of the central shaft assembly, the thrust disc being disposed at least in part in a void within the central shaft assembly.
3. The magnetic bearing assembly of claim 2, wherein the central shaft assembly comprises an axial locating assembly and a radial locating assembly, the thrust disc comprising an axial locating portion disposed in a void in the axial locating assembly and a radial locating portion disposed in a void between the axial locating assembly and the radial locating assembly.
4. The magnetic bearing assembly of claim 3, wherein the central shaft assembly further comprises a mounting shaft, the axial positioning assembly comprises a first axial core and a second axial core, the first axial core and the second axial core are sleeved and fixedly mounted on the mounting shaft and are arranged at intervals along the axial direction of the mounting shaft, and the axial positioning portion of the thrust disc is arranged in a gap between the first axial core and the second axial core.
5. The magnetic bearing assembly of claim 4, wherein the first and second axial cores have axial windings wound therein proximate the axial locating portions to provide an axial electromagnetic force to the rotor assembly.
6. The magnetic bearing assembly of claim 5, wherein the axial windings provided in the first and second axial cores are each wound in a circumferential direction of the mounting shaft.
7. The magnetic bearing assembly of claim 3, wherein the central shaft assembly further comprises a mounting shaft, the axial positioning assembly is fixedly mounted on the mounting shaft, the radial positioning assembly comprises a radial iron core, the radial iron core is sleeved and fixed on the mounting shaft, a gap exists between the radial iron core and the axial positioning assembly along the radial direction of the mounting shaft, and the radial positioning portion of the thrust disc is arranged in the gap between the radial iron core and the axial positioning assembly.
8. The magnetic bearing assembly of claim 7, wherein radial windings wound within the radial cores provide a radial electromagnetic force to the rotor assembly.
9. The magnetic bearing assembly of claim 8, wherein radial windings provided within the radial core are wound in an axial direction of the mounting shaft.
10. The magnetic bearing assembly of claim 3, wherein the central shaft assembly further comprises a mounting shaft and a housing, the mounting shaft fixedly connected with the housing.
11. An external rotor motor assembly, comprising a motor stator assembly and a magnetic levitation bearing assembly as claimed in any one of claims 1-10; wherein,
the motor stator assembly is fixedly connected with the central shaft assembly, the rotor assembly comprises a rotor and a thrust disc, the thrust disc is fixedly connected with the rotor, and the rotor is sleeved outside the motor stator assembly.
12. The external rotor motor assembly of claim 11, wherein the motor stator assembly includes a stator core fixedly connected to the central shaft assembly and stator windings wound within the stator core in an axial direction of the central shaft assembly.
13. An electric motor comprising a motor body and an external rotor motor assembly as claimed in any one of claims 11-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010035511.2A CN111102292A (en) | 2020-01-14 | 2020-01-14 | Magnetic suspension bearing assembly, outer rotor motor assembly and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010035511.2A CN111102292A (en) | 2020-01-14 | 2020-01-14 | Magnetic suspension bearing assembly, outer rotor motor assembly and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111102292A true CN111102292A (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010035511.2A Pending CN111102292A (en) | 2020-01-14 | 2020-01-14 | Magnetic suspension bearing assembly, outer rotor motor assembly and motor |
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| CN (1) | CN111102292A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112003418A (en) * | 2020-08-20 | 2020-11-27 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, assembling method thereof and motor |
| CN118088578A (en) * | 2024-03-05 | 2024-05-28 | 江苏科技大学 | Magnetic bearing structure for composite shaft and assembly method thereof |
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| US6307295B1 (en) * | 1999-04-30 | 2001-10-23 | Sumitomo Electric Industries, Ltd. | Spindle motor and complex bearing assembly for use with the spindle motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112003418A (en) * | 2020-08-20 | 2020-11-27 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, assembling method thereof and motor |
| CN118088578A (en) * | 2024-03-05 | 2024-05-28 | 江苏科技大学 | Magnetic bearing structure for composite shaft and assembly method thereof |
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