CN112636562B - Magnetic gear and composite motor with same - Google Patents
Magnetic gear and composite motor with same Download PDFInfo
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- CN112636562B CN112636562B CN202011376854.1A CN202011376854A CN112636562B CN 112636562 B CN112636562 B CN 112636562B CN 202011376854 A CN202011376854 A CN 202011376854A CN 112636562 B CN112636562 B CN 112636562B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
- H02K49/102—Magnetic gearings, i.e. assembly of gears, linear or rotary, by which motion is magnetically transferred without physical contact
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/005—Machines with only rotors, e.g. counter-rotating rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
- H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
- H02K49/106—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with a radial air gap
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention provides a magnetic gear and a composite motor with the same, wherein the magnetic gear comprises: the inner rotor comprises an inner rotor body, wherein a plurality of inner rotor permanent magnets are arranged on the inner rotor body and are arranged at intervals along the circumferential direction of the inner rotor body; the outer rotor permanent magnets are arranged on the outer rotor body at intervals along the circumferential direction of the outer rotor body; the modulation ring comprises a plurality of modulation blocks and magnetic bridges, and two adjacent modulation blocks are connected through the magnetic bridges; the radial section of the modulation block and the radial section of the magnetic bridge are both in a sector ring shape, and the circle center of the sector ring is the center of the modulation ring; the central angle corresponding to the radial section of the modulation block is theta 1, the central angle corresponding to the magnetic bridge is theta 2, and theta 1/theta 2 is more than 0.3 and less than 0.96. The invention solves the problem that the magnetic gear in the prior art has poor performance due to large torque fluctuation.
Description
Technical Field
The invention relates to the field of magnetic gears, in particular to a magnetic gear and a composite motor with the same.
Background
With the development of science and technology, the performance requirements of people on a transmission system are gradually improved, and the application requirements of the traditional mechanical gear cannot be met due to the defects of high noise, low transmission efficiency and the like, so that the magnetic gear is gradually developed, and the magnetic gear becomes a research hotspot due to simple structure, low vibration noise, self-protection of overload and high operation reliability.
The magnetic gear mainly comprises an inner rotor, an outer rotor and a modulation ring, wherein the modulation ring in the prior art is mostly composed of two end rings and a plurality of magnetic conduction blocks, the end rings and the magnetic conduction blocks are locked through screws, and two adjacent magnetic conduction blocks are separated by a non-magnetic conduction material.
The working principle of the magnetic gear is as follows: the magnetic field that permanent magnet produced on interior (outer) rotor through the modulation effect of modulation ring, produces the harmonic magnetic field with the magnetic field homopolar logarithm that permanent magnet produced on the outer (interior) rotor to realize stable non-contact's torque transfer function, wherein, the modulation ring plays the effect of intermediate medium, and its structure size, mounting means etc. all can directly influence the performance of magnetic force gear.
Disclosure of Invention
The invention mainly aims to provide a magnetic gear and a composite motor with the same, and aims to solve the problem that the performance of the magnetic gear is poor due to large torque fluctuation of the magnetic gear in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a magnetic gear comprising: the inner rotor comprises an inner rotor body, wherein a plurality of inner rotor permanent magnets are arranged on the inner rotor body and are arranged at intervals along the circumferential direction of the inner rotor body; the outer rotor permanent magnets are arranged on the outer rotor body at intervals along the circumferential direction of the outer rotor body; the modulation ring comprises a plurality of modulation blocks and magnetic bridges, and two adjacent modulation blocks are connected through the magnetic bridges; the radial section of the modulation block and the radial section of the magnetic bridge are both in a sector ring shape, and the circle center of the sector ring is the center of the modulation ring; the central angle corresponding to the radial section of the modulation block is theta 1, the central angle corresponding to the magnetic bridge is theta 2, and theta 1/theta 2 is more than 0.3 and less than 0.96.
Further, 0.72 < θ 1/θ 2 < 0.9.
Furthermore, the thickness of the modulation block is h1, the thickness of the magnetic bridge is h2, and the thickness of h2/h1 is more than or equal to 0 and less than or equal to 1.
Further, 0.1 < h2/h1 < 0.22.
Furthermore, a first air gap is formed between the modulation block and the inner rotor body, a second air gap is formed between the modulation block and the outer rotor permanent magnet, and the thickness of the first air gap and the thickness of the second air gap are both h 3; the thickness of the magnetic bridge is h2, and the thickness of the magnetic bridge is more than 0.5 and less than h3/h2 and less than 1.2.
Furthermore, the radius of the outer peripheral surface of the inner rotor body is R1, the inner radius of the outer rotor body is R2, the thickness of the modulation block is h1, and the value of 0.4 < h1/(R2-R1) < 0.6.
Furthermore, the radius of the outer peripheral surface of the inner rotor body is R1, the inner radius of the outer rotor body is R2, the thickness of the inner rotor permanent magnet is h4, and the ratio of 0.4 to h4/(R2-R1) < 0.65.
Further, the outer radius of the inner rotor body is R1, the inner radius of the outer rotor body is R2, the thickness of the outer rotor permanent magnet is h5, and the ratio of 0.2 to h5/(R2-R1) < 0.4.
Further, the inner rotor permanent magnet comprises a first end surface facing the center of the inner rotor body, the center angle corresponding to the first end surface is theta 3, and the number of pole pairs of the inner rotor permanent magnets is P1; the number of pole pairs of the plurality of modulation blocks is P2; the radial section of the modulation block is in a fan-shaped ring shape, and the central angle corresponding to the modulation block is theta 1; 0.8 < (θ 1 × P2)/(θ 3 × P1) < 1.2.
Furthermore, the radial section of the outer rotor permanent magnet is in a fan-ring shape, the central angle corresponding to the outer rotor permanent magnet is theta 4, the number of pole pairs of the outer rotor permanent magnets is P3, the radial section of the modulation block is in a fan-ring shape, and the central angle corresponding to the modulation block is theta 1; the number of pole pairs of the plurality of modulation blocks is P2; 0.08 < (theta 1/theta 4) × (P2/P3-1) < 0.15.
Further, the magnetic gear further includes: the support structure is at least partially arranged on the side of the modulation ring, a positioning part opposite to the modulation block is arranged on the support structure, and a first positioning surface connected with the side surface of the modulation block is arranged on the positioning part so as to support the modulation ring through the support structure.
Further, the support structure comprises: the first end cover is arranged on the first side of the modulation ring, a plurality of positioning parts are arranged on the first end cover, and the plurality of positioning parts and the plurality of modulation blocks are arranged in a one-to-one correspondence manner; and/or the second end cover is arranged on the second side of the modulation ring, a plurality of positioning parts are arranged on the second end cover, and the plurality of positioning parts and the plurality of modulation blocks are arranged in a one-to-one correspondence manner.
Furthermore, the first end cover comprises a first connecting body opposite to the modulation ring, a plurality of positioning parts are arranged on the first connecting body, the positioning parts are positioning bulges, and the positioning bulges are protruded towards the direction far away from the first connecting body; and/or, the second end cover comprises a second connecting body opposite to the modulation ring, the positioning part is arranged on the second connecting body and is a positioning bulge, and the positioning bulge protrudes towards the direction far away from the second connecting body.
According to another aspect of the present invention, there is provided a hybrid electric machine comprising a magnetic gear as described above.
According to the technical scheme, the magnetic gear comprises an inner rotor body, an outer rotor body, a modulation ring and a supporting structure, wherein a plurality of inner rotor permanent magnets are arranged on the inner rotor body and are arranged at intervals along the circumferential direction of the inner rotor body; the outer rotor body is provided with a plurality of outer rotor permanent magnets which are arranged at intervals along the circumferential direction of the outer rotor body; the radial section of the modulation block and the radial section of the magnetic bridge are both in a sector ring shape, and the circle center of the sector ring is the center of the modulation ring; the central angle corresponding to the radial section of the modulation block is theta 1, the central angle corresponding to the magnetic bridge is theta 2, and the modulation effect of the modulation ring on the magnetic field is based on the principle that the magnetic conductance is uneven, namely, the magnetic conductance of the modulation block is far larger than that of air, so that in order to ensure the unevenness of the magnetic conductance in the annular region where the modulation ring is located, 0.3 < theta 1/theta 2 < 0.96 is limited. The setting sizes of the modulation blocks in the modulation ring and the magnetic bridge are correlated, so that magnetic fields generated by the inner rotor permanent magnet and the outer rotor permanent magnet can be better dredged, more magnetic lines of force enter the air gap on the other side to participate in energy conversion, meanwhile, the torque of the magnetic gear can be effectively improved, the air gap flux density waveform is improved, the torque fluctuation is reduced, and the working performance of the magnetic gear is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a schematic structural diagram of an embodiment of a magnetic gear according to the present invention;
fig. 2 shows a schematic structural view of an inner rotor body of the magnetic gear according to the present invention;
fig. 3 shows a schematic structural view of an outer rotor body of the magnetic gear according to the present invention;
FIG. 4 shows a schematic of a modulating ring of a magnetic gear according to the present invention;
FIG. 5 shows a schematic structural view of a support structure for a magnetic gear according to the present invention;
FIG. 6 shows a structural schematic of a first perspective of a support structure for a magnetic gear according to the present invention;
FIG. 7 is a structural schematic diagram illustrating a second perspective of a support structure for a magnetic gear according to the present invention;
FIG. 8 shows a graph of output torque versus torque ripple for different values of h1/h2 for a magnetic gear according to the present invention; and
fig. 9 shows output torque versus torque curves for different values of h1/(R2-R1) for a magnetic gear according to the present invention.
Wherein the figures include the following reference numerals:
1. an inner rotor body; 10. an inner rotor permanent magnet; 2. an outer rotor body; 20. an outer rotor permanent magnet; 3. a modulation loop; 30. a modulation block; 31. a magnetic bridge; 4. a support structure; 40. a positioning part; 41. a first end cap; 42. a second end cap; 410. a first connection body; 420. a second connection body; 5. and (5) plastic packaging the component.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The present invention provides a magnetic gear, please refer to fig. 1 to 7, comprising: the inner rotor comprises an inner rotor body 1, wherein a plurality of inner rotor permanent magnets 10 are arranged on the inner rotor body 1, and the inner rotor permanent magnets 10 are arranged at intervals along the circumferential direction of the inner rotor body 1; the outer rotor comprises an outer rotor body 2, wherein a plurality of outer rotor permanent magnets 20 are arranged on the outer rotor body 2, and the plurality of outer rotor permanent magnets 20 are arranged at intervals along the circumferential direction of the outer rotor body 2; the modulation loop 3 comprises a plurality of modulation blocks 30 and magnetic bridges 31, and two adjacent modulation blocks 30 are connected through the magnetic bridges 31; the radial section of the modulation block 30 and the radial section of the magnetic bridge 31 are both in a sector ring shape, and the center of the sector ring is the center of the modulation ring 3; the central angle corresponding to the radial section of the modulation block 30 is theta 1, the central angle corresponding to the magnetic bridge 31 is theta 2, and theta 1/theta 2 is more than 0.3 and less than 0.96.
The magnetic gear comprises an inner rotor body 1, an outer rotor body 2 and a modulation ring 3, wherein the inner rotor body 1 is provided with a plurality of inner rotor permanent magnets 10, and the plurality of inner rotor permanent magnets 10 are arranged at intervals along the circumferential direction of the inner rotor body 1; a plurality of outer rotor permanent magnets 20 are arranged on the outer rotor body 2, and the plurality of outer rotor permanent magnets 20 are arranged at intervals along the circumferential direction of the outer rotor body 2; the radial section of the modulation block 30 and the radial section of the magnetic bridge 31 are both in a sector ring shape, and the center of the sector ring is the center of the modulation ring 3; the central angle corresponding to the radial cross section of the modulation block 30 is θ 1, the central angle corresponding to the magnetic bridge 31 is θ 2, and the modulation effect of the modulation ring on the magnetic field is based on the principle that the flux guide is not uniform, that is, the flux guide of the modulation block 30 is far greater than the flux guide of the air, so in order to ensure the non-uniformity of the flux guide in the annular region where the modulation ring is located, 0.3 < θ 1/θ 2 < 0.96 is defined. The setting sizes of the modulation blocks 30 and the magnetic bridges 31 in the modulation ring 3 are correlated, so that magnetic fields generated by the inner rotor permanent magnet and the outer rotor permanent magnet can be better dredged, more magnetic lines of force enter the air gap on the other side to participate in energy conversion, the torque of the magnetic gear can be effectively improved, the air gap flux density waveform is improved, the torque fluctuation is reduced, and the working performance of the magnetic gear is improved.
Further, in order to generate better modulation effect on the magnetic field by the time modulation block, the distribution of the air gap flux density is more uniform, and preferably, 0.72 < theta 1/theta 2 < 0.9. It should be noted here that the radial cross section of the modulation ring 3 refers to a plane perpendicular to the central rotation axis of the modulation ring 3.
The modulation ring 3 is used as a communication path of the internal and external magnetic fields, the thickness of the modulation ring directly influences the magnetic field modulation effect, as shown in fig. 8, the thickness of the modulation block 30 is h1, the thickness of the magnetic bridge 31 is h2, and 0 ≦ h2/h1 ≦ 1. In order to obtain higher torques and lower torque fluctuations, 0.1 < h2/h1 < 0.22 is preferred. When it should be noted here, the thickness of the modulation block 30 refers to a distance between a first end surface of the modulation block 30 facing the inner rotor permanent magnet and a second end surface of the modulation block 30 facing the outer rotor permanent magnet.
Because the magnetic bridge 31 belongs to a magnetic conductive material and is close to the first air gap, a magnetic flux path can be provided for a magnetic field generated by the inner rotor permanent magnet, the first air gap is formed between the modulation block 30 and the inner rotor body 1, the second air gap is formed between the modulation block 30 and the outer rotor permanent magnet 20, and the thickness of the first air gap and the thickness of the second air gap are both h 3; the thickness of the magnetic bridge 31 is h2, 0.5 < h3/h2 < 1.2. In this range, the magnetic bridge 31 just reaches the saturation state, avoiding the increase of iron loss during supersaturation and the reduction of the utilization rate of the modulation body during non-saturation. It should be noted here that the thickness of the first air gap and the thickness of the second air gap refer to a distance between the inner circumferential surface of the modulation block 30 and the outer circumferential surface of the outer rotor permanent magnet 20 and a distance between the inner circumferential surface of the modulation block and the outer circumferential surface of the inner rotor permanent magnet in the radial direction of the modulation ring.
Because the size of the inner rotor body 1 determines the length of a magnetic circuit of a magnetic field generated by the inner rotor permanent magnet, and the thickness of the modulation block 30 is opposite to the dredging function of the modulation block on the magnetic field, the radius of the outer peripheral surface of the inner rotor body 1 is limited to be R1, the inner radius of the outer rotor body 2 is limited to be R2, and the thickness of the modulation block 30 is h1, wherein 0.4 < h1/(R2-R1) < 0.6. At this time, in the case of ensuring that the placement space of the outer rotor permanent magnet 20 is sufficient, the modulation effect of the modulation block 30 on the magnetic field is the best, the magnetic gear can provide a large output torque, and the output torque pair at different values of h1/(R2-R1) is shown in fig. 9.
The radius of the outer peripheral surface of the inner rotor body 1 is R1, the inner radius of the outer rotor body 2 is R2, the thickness of the inner rotor permanent magnet 10 is h4, and the ratio of 0.4 to h4/(R2-R1) < 0.65. The outer radius of the inner rotor body 1 is R1, the inner radius of the outer rotor body 2 is R2, the thickness of the outer rotor permanent magnet 20 is h5, and the value of h5/(R2-R1) is more than 0.2 and less than 0.4. In the range, the magnetic fields generated by the inner and outer rotor permanent magnets can meet the torque requirement, the magnetic density supersaturation phenomenon of the inner and outer rotor bodies can not occur, and the utilization rate of the inner and outer rotor permanent magnets and the inner and outer rotor bodies is highest.
As shown in fig. 2, the inner rotor permanent magnet 10 includes a first end surface facing the center of the inner rotor body 1, the central angle corresponding to the first end surface is θ 3, and the number of pole pairs of the inner rotor permanent magnets 10 is P1; the number of pole pairs of the plurality of modulation blocks 30 is P2; the radial section of the modulation block 30 is in a fan-shaped ring shape, and the central angle corresponding to the modulation block 30 is theta 1; 0.8 < (θ 1 × P2)/(θ 3 × P1) < 1.2. Within the range, the modulation effect of the modulation ring 3 on the inner rotor permanent magnet and the outer rotor permanent magnet is optimal.
In the specific implementation process, as shown in fig. 3, the radial cross section of the outer rotor permanent magnet 20 is a fan-shaped ring, the central angle corresponding to the outer rotor permanent magnet 20 is θ 4, the number of pole pairs of the outer rotor permanent magnets 20 is P3, the radial cross section of the modulation block 30 is a fan-shaped ring, and the central angle corresponding to the modulation block 30 is θ 1; the number of pole pairs of the plurality of modulation blocks 30 is P2; 0.08 < (theta 1/theta 4) × (P2/P3-1) < 0.15. Within the range, the modulation effect of the modulation ring 3 on the inner rotor permanent magnet and the outer rotor permanent magnet is optimal.
In the embodiment of the present invention, as shown in fig. 5, the magnetic gear further includes a support structure 4, at least a portion of the support structure 4 is mounted on a side of the modulation ring 3, a positioning portion 40 opposite to the modulation block 30 is provided on the support structure 4, and a first positioning surface connected to a side surface of the modulation block 30 is provided on the positioning portion 40 to support the modulation ring 3 through the support structure 4.
Specifically, the support structure 4 is provided with a positioning portion 40 opposing the modulation block 30, and the positioning portion 40 is provided with a first positioning surface connected to a side surface of the modulation block 30. The positioning precision between the supporting structure and the modulation ring can be improved through the first positioning surface, the supporting structure 4 is fixedly connected through the modulation ring 3 through a plastic package process, the supporting structure and the modulation ring are axially compressed during plastic package, a plastic package material flows into a groove on the modulation ring and a groove on the other side of the supporting structure from a plastic package groove on one side of the supporting structure, all groove spaces are filled, the supporting structure and the modulation ring are fixed into a whole, the mechanical strength of the modulation ring is improved, the coaxiality of the supporting structure and the modulation ring can be further improved by adopting a plastic package mode, the inner and outer air gaps are improved, vibration is reduced, and noise is reduced.
The inner air gap is an air gap between the modulation ring and the inner rotor permanent magnet, the outer air gap is an air gap between the modulation ring and the outer rotor permanent magnet, and the plastic packaging material is made of industrial plastics with strength and performance meeting requirements.
Specifically, as shown in fig. 6 and 7, the support structure 4 includes: a first end cover 41 arranged on a first side of the modulation ring 3, wherein a plurality of positioning parts 40 are arranged on the first end cover 41, and the plurality of positioning parts 40 are arranged in one-to-one correspondence with the plurality of modulation blocks 30; and/or a second end cover 42 arranged on the second side of the modulation ring 3, wherein a plurality of positioning parts 40 are arranged on the second end cover 42, and the plurality of positioning parts 40 are arranged in one-to-one correspondence with the plurality of modulation blocks 30. Since the modulation ring 3 is provided with the plurality of modulation blocks 30, the plurality of positioning portions 40 and the plurality of modulation blocks 30 are arranged in a one-to-one correspondence manner, so that the plurality of modulation blocks and the plurality of positioning portions 40 are tightly matched one by one, and the plastic packaging precision and strength are improved in the plastic packaging process.
In a specific implementation process, the first end cap 41 includes a first connection body 410 opposite to the modulation ring 3, the plurality of positioning portions 40 are disposed on the first connection body 410, the positioning portions 40 are positioning protrusions, and the positioning protrusions protrude toward a direction away from the first connection body 410; and/or the second end cap 42 comprises a second connecting body 420 opposite to the modulation ring 3, the positioning part 40 is arranged on the second connecting body 420, and the positioning part 40 is a positioning bulge which protrudes towards the direction far away from the second connecting body 420.
The magnetic gear provided by the invention is characterized in that the modulation ring is integrally formed by laminating single-piece formed silicon steel sheets, the modulation ring is improved, a plurality of single modulation blocks are designed into an integral structure with a magnetic bridge in the middle, the magnetic field generated by the inner and outer permanent magnets can be better dredged after improvement, more magnetic lines of force enter an air gap on the other side to participate in energy conversion, the torque of the magnetic gear comprising the structure can be effectively improved by limiting the size of each part, the air gap flux density waveform can be improved, the torque fluctuation is reduced, the magnetic bridge can share the force which is originally and intensively acted on the modulation blocks, the mechanical strength of the modulation ring is enhanced, meanwhile, the stress on the modulation ring is further counteracted through a matched supporting structure, and the running performance of the magnetic gear is ensured. The first groove is arranged between the two adjacent modulation blocks, the second groove is arranged between the two adjacent positioning parts, and after the first positioning surface is attached to the modulation blocks, the first groove is communicated with the second groove to form a communication channel for circulating plastic package materials, so that the mechanical strength of the modulation ring is improved.
The invention also provides a composite motor which comprises the magnetic gear, wherein the magnetic gear is the magnetic gear of the embodiment.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
the magnetic gear comprises an inner rotor body 1, an outer rotor body 2, a modulation ring 3 and a support structure 4, wherein the inner rotor body 1 is provided with a plurality of inner rotor permanent magnets 10, and the inner rotor permanent magnets 10 are arranged at intervals along the circumferential direction of the inner rotor body 1; a plurality of outer rotor permanent magnets 20 are arranged on the outer rotor body 2, and the plurality of outer rotor permanent magnets 20 are arranged at intervals along the circumferential direction of the outer rotor body 2; the radial section of the modulation block 30 and the radial section of the magnetic bridge 31 are both in a sector ring shape, and the center of the sector ring is the center of the modulation ring 3; the central angle corresponding to the radial cross section of the modulation block 30 is θ 1, the central angle corresponding to the magnetic bridge 31 is θ 2, and the modulation effect of the modulation ring on the magnetic field is based on the principle that the flux guide is not uniform, that is, the flux guide of the modulation block 30 is far greater than the flux guide of the air, so in order to ensure the non-uniformity of the flux guide in the annular region where the modulation ring is located, 0.3 < θ 1/θ 2 < 0.96 is defined. The setting sizes of the modulation blocks 30 and the magnetic bridges 31 in the modulation ring 3 are correlated, so that magnetic fields generated by the inner rotor permanent magnet and the outer rotor permanent magnet can be better dredged, more magnetic lines of force enter the air gap on the other side to participate in energy conversion, the torque of the magnetic gear can be effectively improved, the air gap flux density waveform is improved, the torque fluctuation is reduced, and the working performance of the magnetic gear is improved.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A magnetic gear, comprising:
the inner rotor comprises an inner rotor body (1), wherein a plurality of inner rotor permanent magnets (10) are arranged on the inner rotor body (1), and the inner rotor permanent magnets (10) are arranged at intervals along the circumferential direction of the inner rotor body (1);
the outer rotor comprises an outer rotor body (2), wherein a plurality of outer rotor permanent magnets (20) are arranged on the outer rotor body (2), and the outer rotor permanent magnets (20) are arranged at intervals along the circumferential direction of the outer rotor body (2);
the modulation ring (3) comprises a plurality of modulation blocks (30) and magnetic bridges (31), and two adjacent modulation blocks (30) are connected through the magnetic bridges (31);
the radial cross section of the modulation block (30) and the radial cross section of the magnetic bridge (31) are both in a sector ring shape, and the center of the sector ring is the center of the modulation ring (3); the central angle corresponding to the radial cross section of the modulation block (30) is theta 1, the central angle corresponding to the magnetic bridge (31) is theta 2, and theta 1/theta 2 is more than 0.3 and less than 0.96;
the radius of the outer peripheral surface of the inner rotor body (1) is R1, the inner radius of the outer rotor body (2) is R2, the thickness of the modulation block (30) is h1, and the ratio of 0.4 to h1/(R2-R1) to 0.6 is less.
2. The magnetic gear of claim 1, wherein 0.72 < θ 1/θ 2 < 0.9.
3. The magnetic gear according to claim 1, characterized in that the thickness of the modulation block (30) is h1, the thickness of the magnetic bridge (31) is h2, 0 ≦ h2/h1 ≦ 1.
4. The magnetic gear of claim 3, wherein 0.1 < h2/h1 < 0.22.
5. The magnetic gear of claim 1, wherein there is a first air gap between the modulation block (30) and the inner rotor body (1), and a second air gap between the modulation block (30) and the outer rotor permanent magnet (20), the first air gap and the second air gap each having a thickness of h 3; the thickness of the magnetic bridge (31) is h2, and the thickness of the magnetic bridge is more than 0.5 and less than 0.2 and less than h3/h2 and less than 1.2.
6. The magnetic gear according to claim 1, wherein the outer peripheral surface of the inner rotor body (1) has a radius of R1, the inner radius of the outer rotor body (2) is R2, and the thickness of the inner rotor permanent magnet (10) is h4, 0.4 < h4/(R2-R1) < 0.65.
7. The magnetic gear according to claim 1, wherein the outer radius of the inner rotor body (1) is R1, the inner radius of the outer rotor body (2) is R2, and the thickness of the outer rotor permanent magnet (20) is h5, 0.2 < h5/(R2-R1) < 0.4.
8. The magnetic gear of claim 1, wherein the inner rotor permanent magnet (10) comprises a first end surface facing the center of the inner rotor body (1), the first end surface corresponds to a center angle θ 3, and the number of pole pairs of the inner rotor permanent magnets (10) is P1; the number of pole pairs of the plurality of modulation blocks (30) is P2; the radial section of the modulation block (30) is in a sector ring shape, and the central angle corresponding to the modulation block (30) is theta 1;
0.8＜(θ1×P2)/(θ3×P1)＜1.2。
9. the magnetic gear according to claim 1, wherein the outer rotor permanent magnet (20) has a sector-shaped radial cross section, the outer rotor permanent magnet (20) has a central angle θ 4, the number of pole pairs of the outer rotor permanent magnets (20) is P3, the modulation block (30) has a sector-shaped radial cross section, and the modulation block (30) has a central angle θ 1; the number of pole pairs of the plurality of modulation blocks (30) is P2; 0.08 < (theta 1/theta 4) × (P2/P3-1) < 0.15.
10. The magnetic gear of any one of claims 1 to 9, further comprising:
the support structure (4), the side of modulation ring (3) is installed to at least part of bearing structure (4), be provided with on bearing structure (4) with modulate the relative location portion (40) of piece (30), be provided with the first locating surface that is connected with the side of the piece (30) of modulating on location portion (40) to support modulation ring (3) through bearing structure (4).
11. A magnetic gear according to claim 10, characterized in that said supporting structure (4) comprises:
a first end cap (41) arranged on a first side of the modulation ring (3), wherein a plurality of positioning parts (40) are arranged on the first end cap (41), and the plurality of positioning parts (40) and the plurality of modulation blocks (30) are arranged in a one-to-one correspondence manner; and/or the presence of a gas in the gas,
and a second end cap (42) disposed on a second side of the modulation ring (3), wherein the second end cap (42) is provided with a plurality of positioning portions (40), and the plurality of positioning portions (40) are disposed in one-to-one correspondence with the plurality of modulation blocks (30).
12. The magnetic gear according to claim 11, wherein the first end cap (41) includes a first connection body (410) opposite to the modulation ring (3), a plurality of the positioning portions (40) are provided on the first connection body (410), the positioning portions (40) are positioning projections that project toward a direction away from the first connection body (410); and/or the presence of a gas in the gas,
the second end cover (42) comprises a second connecting body (420) opposite to the modulation ring (3), the positioning part (40) is arranged on the second connecting body (420), the positioning part (40) is a positioning bulge, and the positioning bulge protrudes towards the direction far away from the second connecting body (420).
13. A compound electric machine comprising a magnetic gear, characterised in that the magnetic gear is as claimed in any one of claims 1 to 12.
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| WO2009072081A1 (en) * | 2007-12-07 | 2009-06-11 | Oc Oerlikon Balzers Ag | A method of magnetron sputtering and a method for determining a power modulation compensation function for a power supply applied to a magnetron sputtering source |
| CN109617348A (en) * | 2018-11-16 | 2019-04-12 | 江苏大学 | A kind of novel permanent magnetic array magnetic gear motor |
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| DE4405701A1 (en) * | 1994-02-23 | 1995-08-24 | Philips Patentverwaltung | Magnetic gear with several magnetically interacting, relatively movable parts |
| CA2732646C (en) * | 2008-07-30 | 2016-01-12 | A.O. Smith Corporation | Interior permanent magnet motor including rotor with unequal poles |
| CN103795224B (en) * | 2014-01-21 | 2017-01-11 | 江苏大学 | Superconductive magnetism-isolation-type magnetism adjusting device |
| CN204633551U (en) * | 2015-06-10 | 2015-09-09 | 哈尔滨理工大学 | The Flux modulation formula compound machine of block form composite excitation structure |
| CN109889016A (en) * | 2019-03-11 | 2019-06-14 | 三峡大学 | A kind of high torque density magnetic-gear of non-homogeneous air gap |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009072081A1 (en) * | 2007-12-07 | 2009-06-11 | Oc Oerlikon Balzers Ag | A method of magnetron sputtering and a method for determining a power modulation compensation function for a power supply applied to a magnetron sputtering source |
| CN109617348A (en) * | 2018-11-16 | 2019-04-12 | 江苏大学 | A kind of novel permanent magnetic array magnetic gear motor |
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