CN115395752B - Double-layer permanent magnet axial flux generator permanent magnet rotor disc and power generation method - Google Patents
Double-layer permanent magnet axial flux generator permanent magnet rotor disc and power generation method Download PDFInfo
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- CN115395752B CN115395752B CN202211314885.3A CN202211314885A CN115395752B CN 115395752 B CN115395752 B CN 115395752B CN 202211314885 A CN202211314885 A CN 202211314885A CN 115395752 B CN115395752 B CN 115395752B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2793—Rotors axially facing stators
- H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention relates to a double-layer permanent magnet axial flux generator permanent magnet rotor disc and a power generation method, relating to the field of axial flux permanent magnet motors and being used for solving the problem that a generator rotor in the prior art cannot bear huge inertia force caused by ultrahigh rotating speed, wherein the double-layer permanent magnet axial flux generator permanent magnet rotor disc comprises: the carbon fiber restraining device comprises a carbon fiber restraining ring and a permanent magnet ring, wherein the carbon fiber restraining ring comprises an inner carbon fiber restraining ring and an outer carbon fiber restraining ring; the permanent magnet ring comprises an inner layer permanent magnet ring and an outer layer permanent magnet ring, the outer layer permanent magnet ring and the inner layer permanent magnet ring both consist of arc short rod-shaped permanent magnets, the outer layer permanent magnet ring is arranged between the inner layer carbon fiber restraining ring and the outer layer carbon fiber restraining ring, and the inner layer permanent magnet ring is arranged on one surface, close to the center of the carbon fiber restraining ring, of the inner layer carbon fiber restraining ring; the carbon fiber restraining ring is connected with the permanent magnet ring through a high polymer bonding material.
Description
Technical Field
The invention relates to the field of axial flux permanent magnet motors, in particular to a permanent magnet rotor disc of a double-layer permanent magnet axial flux generator and a power generation method.
Background
The axial flux permanent magnet motor is also called a disc motor, has the obvious advantages of compact structure, high torque density, high efficiency and the like, and has good application prospect in occasions such as electric vehicles, wind power generation, aircraft propulsion systems and the like.
However, the outer diameter of the rotor of the axial magnetic field motor is generally the same as that of the stator, so that the outer diameter of the rotor is larger, and the rotational inertia is large. At present, the axial magnetic field permanent magnet motor is developing towards high speed and high power density, so that higher requirements are put forward on the structural strength of a disc rotor with large inertia. For high power axial magnetic fields, especially at high speed, rotor strength and protection of permanent magnets become important technical difficulties. In addition, most of the existing axial magnetic field motor rotors are complex in structure and high in cost.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a double-layer permanent magnet axial flux generator permanent magnet rotor disc and a power generation method, which are used for solving the problems.
In order to achieve the purpose, the invention provides a double-layer permanent magnet axial flux generator permanent magnet rotor disc and a power generation method.
In a first aspect, the present invention provides a double-layer permanent magnet axial flux generator permanent magnet rotor disc, comprising: the carbon fiber restraining ring comprises an inner carbon fiber restraining ring and an outer carbon fiber restraining ring; the permanent magnet ring comprises an inner layer permanent magnet ring and an outer layer permanent magnet ring, the outer layer permanent magnet ring and the inner layer permanent magnet ring both consist of arc short rod-shaped permanent magnets, the outer layer permanent magnet ring is arranged between the inner layer carbon fiber restraining ring and the outer layer carbon fiber restraining ring, and the inner layer permanent magnet ring is arranged on one surface, close to the center of the carbon fiber restraining ring, of the inner layer carbon fiber restraining ring; the carbon fiber restraining ring is connected with the permanent magnet ring through a high polymer bonding material.
Optionally, at least one section of the outer carbon fiber restraint ring is in the shape of a circular ring, and carbon fibers are laid in the outer carbon fiber restraint ring along the tangential direction. Its advantage is high structural strength.
Optionally, at least one cross section of the inner carbon fiber restraint ring is in the shape of a circular ring, and carbon fibers are laid in the inner carbon fiber restraint ring along the tangential direction. Its advantage is high structural strength.
Optionally, the outer permanent magnet ring is composed of a plurality of arc short rod-shaped first composition units, and the middle points of the first composition units and the axis of the outer permanent magnet ring are on the same straight line. The advantage is that the upper limit of the rotational speed of the rotor is increased.
Optionally, the inner permanent magnet ring is composed of a plurality of arc short rod-shaped second constituent units, and a midpoint of each second constituent unit is collinear with an axis of the inner permanent magnet ring. Its advantages are high rotation speed of rotor, and high magnetic field intensity.
Optionally, the outer layer permanent magnet ring is arranged between the outer layer carbon fiber restraining ring and the inner layer carbon fiber restraining ring. Its advantages are high strength of rotor structure, and simple structure.
Optionally, the inner carbon fiber confinement ring is disposed between the outer permanent magnet ring and the inner permanent magnet ring. Its advantages are compact structure and high strength of rotor.
Optionally, the first constituent unit and the second constituent unit are arranged in a halbach array. Its advantage is high rotation speed of rotor and high electric generating efficiency.
In a second aspect, the invention also provides a method of generating electricity. The axial flux generator comprises a stator and any one of the double-layer permanent magnet axial flux generator permanent magnet rotor disks, so that the generating efficiency of the generator is improved.
Optionally, the axial magnetic field generated by cutting the ring of permanent magnets with stator windings in the stator generates an electric current.
Drawings
FIG. 1 is a schematic assembled view of a double layer permanent magnet axial flux generator permanent magnet rotor disk of the present invention;
FIG. 2 is a schematic disassembled view of a double layer permanent magnet axial flux generator permanent magnet rotor disk assembly of the present invention;
FIG. 3 is a schematic diagram of two permanent magnets used in a permanent magnet rotor disk of a dual layer permanent magnet axial flux generator according to the present invention;
FIG. 4 is a flow chart of a method of generating power according to the present invention.
In the figure: 1-inner layer permanent magnet ring, 2-outer layer permanent magnet ring, 3-inner layer carbon fiber restraining ring, 4-outer layer carbon fiber restraining ring, 5-second composition unit and 6-first composition unit.
Detailed Description
Specific embodiments of the present invention will be described in detail below, and it should be noted that the embodiments described herein are only for illustration and are not intended to limit the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known circuits, software, or methods have not been described in detail so as not to obscure the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "in one embodiment," "in an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale.
Referring to fig. 1-3, the illustrated embodiment of the present invention provides a double layer permanent magnet axial flux generator permanent magnet rotor disk comprising carbon fiber constraining rings and permanent magnet rings.
Referring to fig. 2, the carbon fiber confinement ring includes an outer carbon fiber confinement ring 4 and an inner carbon fiber confinement ring 3, the outer carbon fiber confinement ring 4 and the inner carbon fiber confinement ring 3 are coaxially disposed, and a diameter of the outer carbon fiber confinement ring 4 is greater than a diameter of the inner carbon fiber confinement ring 3. The carbon fiber restraining ring uses high-strength carbon fibers to bear huge inertia force brought by ultrahigh rotating speed, and meanwhile, elastic deformation of the rotor in ultrahigh-speed rotation is reduced.
The carbon fiber is a novel fiber material of high-strength and high-modulus fiber with the carbon content of more than 95%, the carbon fiber is light in weight, but high in strength, has the characteristics of corrosion resistance and high modulus, and can reduce the structural weight while improving the structural strength, reduce the inertia force of the rotor during high-speed rotation and improve the upper limit of the rotor rotation speed; the carbon fiber used in the embodiment is an M60 high modulus carbon fiber, and in other alternative embodiments, other types of carbon fibers can be selected according to actual situations.
Referring to fig. 2, at least one section of each permanent magnet ring is in a ring shape, each permanent magnet ring comprises an outer permanent magnet ring 2 and an inner permanent magnet ring 1, the outer permanent magnet ring 2 and the inner permanent magnet ring 1 are coaxially arranged, the diameter of the outer permanent magnet ring 2 is larger than that of the inner permanent magnet ring 1, the permanent magnet rings and the carbon fiber confinement rings are coaxially arranged, and the permanent magnet rings and the carbon fiber confinement rings are arranged at intervals. The permanent magnet ring is used for generating an axial magnetic field, and the permanent magnet ring and the carbon fiber restraint ring are arranged at intervals, so that the permanent magnet ring can only bear compressive stress, and the permanent magnet is protected.
Specifically, the permanent magnets used in this embodiment are 24N 56 magnets, and in other alternative embodiments, other numbers and types of permanent magnets may be selected according to actual situations.
In an alternative embodiment, the specific data given for "thickness" and "radius" etc. are non-limiting data.
In this embodiment, at least one cross section of the outer carbon fiber confinement ring 4 is in the shape of a circular ring, and carbon fibers are laid in the outer carbon fiber confinement ring 4 along a tangential direction.
Specifically, the thickness of the carbon fiber of the outer carbon fiber confinement ring 4 is 15mm, and the maximum radius of the outer carbon fiber confinement ring 4 is 100mm.
The rotor disc has the advantages that the carbon fibers are laid along the tangential direction, the structural strength is higher, the outer layer carbon fiber restraining ring can bear larger centrifugal force due to the larger carbon fiber thickness, and the stability of the overall structure of the rotor disc is guaranteed.
In this embodiment, at least one cross section of the inner carbon fiber confinement ring 3 is in the shape of a circular ring, and carbon fibers are laid in the inner carbon fiber confinement ring 3 along the tangential direction.
Specifically, the thickness of the carbon fiber of the inner carbon fiber confinement ring 3 is 10mm.
The rotor disc has the advantages that the structural strength of the carbon fibers laid along the tangential direction is higher, the inner-layer carbon fiber restraining ring can bear larger centrifugal force, the thickness of the inner-layer carbon fiber restraining ring is slightly smaller than that of the outer-layer carbon fiber restraining ring, the strength of the overall structure is guaranteed, the overall weight of the rotor disc is reduced, meanwhile, the rotor disc can be matched with the outer-layer carbon fiber restraining ring to restrain and protect the permanent magnet ring, and the upper limit of the rotating speed of the rotor disc is improved.
In this embodiment, the outer permanent magnet ring 2 is formed of arc-shaped short rod-shaped first constituent elements 6 having the same size, and the midpoint of the first constituent element 6 is aligned with the axis of the outer permanent magnet ring 2.
Specifically, the outer permanent magnet ring 2 is composed of 12 first constituent units 6 with the same size, and the thickness of the outer permanent magnet ring 2 is 2mm.
The rotor disc has the advantages that the arrangement layout of the permanent magnets is conveniently and reasonably designed, structures such as iron cores, bolts and the like in the traditional rotor disc are eliminated, the weight of the rotor disc is reduced, and the upper limit of the rotating speed of the rotor is improved.
In this embodiment, the inner permanent magnet ring 1 is formed of arc-shaped short rod-shaped second constituent units 5 having the same size, and the midpoint of the second constituent unit 5 is aligned with the axis of the inner permanent magnet ring 1.
Specifically, the inner permanent magnet ring 1 is composed of 12 second constituent units 5 with the same size, and the thickness of the inner permanent magnet ring 1 is 2mm.
The rotor disc has the advantages that the arrangement layout of the permanent magnets is conveniently and reasonably designed, structures such as iron cores, bolts and the like in the traditional rotor disc are eliminated, the weight of the rotor disc is reduced, and the upper limit of the rotating speed of the rotor is improved; the magnetic field generated by the inner layer permanent magnet ring is superposed with the magnetic field generated by the outer layer permanent magnet ring, so that the magnetic field intensity can be effectively increased.
In this embodiment, the outer permanent magnet ring 2 is disposed between the outer carbon fiber confinement ring 4 and the inner carbon fiber confinement ring 3, and the outer permanent magnet ring 2 and the carbon fiber confinement ring are connected by a polymer bonding material.
Specifically, the polymer adhesive material is a lotai 402 instant adhesive, and other types of polymer adhesive materials can be selected in some alternative embodiments.
The method has the advantages that the structural strength weakness of bolts, hole structures and the like caused in carbon fiber materials is avoided by using the high-molecular bonding material, the complexity of the rotor disc structure is reduced, and the method is easy to realize.
In this embodiment, the inner carbon fiber confinement ring is disposed between the outer permanent magnet ring 2 and the inner permanent magnet ring 1, and the inner carbon fiber confinement ring 3 is connected to the permanent magnet rings through a polymer adhesive material.
Specifically, the polymer adhesive material is loctite 402 instant adhesive, and other types of polymer adhesive materials may be selected in other alternative embodiments.
The rotor disc structure has the advantages that the high-molecular bonding material is used for replacing a bolt structure in the traditional rotor disc, so that the rotor disc structure is more compact, and the stability is stronger; the weight of the rotor disc is reduced, and the upper limit of the rotating speed of the rotor disc is improved.
In this embodiment, the first constituent unit 6 and the second constituent unit 5 are arranged in a halbach array.
Specifically, the first constituent unit 6 and the second constituent unit 5 are both N56 magnets, and in other alternative embodiments, other types of permanent magnets may be selected, and the specific type is not limited herein.
The permanent magnet rotor has the advantages that the radial magnetized permanent magnet can be used for generating an axial magnetic field, the permanent magnet can generate a stronger magnetic field only by a small thickness, the compression stress caused by the permanent magnet on the carbon fiber restraining ring is greatly reduced, and the upper limit of the rotating speed of the rotor disc is improved; meanwhile, the Halbach type permanent magnet array can improve the air gap flux density, and further improve the power generation efficiency.
In conclusion, the permanent magnet rotor disc of the double-layer permanent magnet axial flux generator provided by the invention has the advantages of simple and compact structure, strong stability and high strength, and greatly improves the working efficiency of the rotor disc while reducing the manufacturing cost of the rotor disc.
Referring to fig. 4, the illustrated embodiment of the present invention also provides a method of generating electricity for improving the efficiency of electricity generation using a double layer permanent magnet axial flux generator permanent magnet rotor disk.
S1: an axial flux generator is provided comprising a stator and the double layer permanent magnet axial flux generator permanent magnet rotor disk comprising carbon fibre confinement rings and the permanent magnet rings.
S2: the carbon fiber restraining ring is used for bearing the huge inertia force of the rotor in ultrahigh rotating speed, restraining and protecting the permanent magnet ring, reducing the elastic deformation of the rotor in ultrahigh rotating speed and improving the strength of the whole structure of the rotor.
Specifically, the carbon fiber confinement rings comprise an outer layer carbon fiber confinement ring 4 and an inner layer carbon fiber confinement ring 3, and the outer layer carbon fiber confinement ring 4 and the inner layer carbon fiber confinement ring 3 are coaxially arranged. The permanent magnet ring comprises an outer permanent magnet ring 2 and an inner permanent magnet ring 1, the permanent magnet ring and the carbon fiber restraint ring are coaxially arranged, the outer permanent magnet ring 2 is arranged between the outer carbon fiber restraint ring 4 and the inner carbon fiber restraint ring 3, the inner carbon fiber restraint ring 3 is arranged between the outer permanent magnet ring 2 and the inner permanent magnet ring 1, and the carbon fiber restraint ring and the permanent magnet ring are connected through a high polymer bonding material.
Further, the carbon fiber used in the carbon fiber confinement ring is M60 high modulus carbon fiber, and the polymer adhesive material is loctite 402 instant adhesive, and in some alternative embodiments, other types of carbon fiber and polymer adhesive material may be selected.
S3: and an axial magnetic field is generated by utilizing the permanent magnet ring for generating electricity.
Specifically, the first constituent unit 6 and the second constituent unit 5 are arranged in a halbach array.
Further, the outer permanent magnet ring 2 is composed of 12 first constituent units 6 with the same size, the inner permanent magnet ring 1 is composed of 12 first constituent units 5 with the same size, the first constituent units 6 and the second constituent units 5 are both N56 magnets, and the thicknesses of the outer permanent magnet ring 2 and the inner permanent magnet ring 1 are both 2mm.
In this embodiment, the axial magnetic field generated by cutting the permanent magnet ring with the stator winding in the stator generates a current.
Specifically, the stator may be a plurality of types of stators, and the specific structure and design thereof may refer to the prior art, which is not described herein for brevity.
The generator has the advantages that the rotor is simple in structure, high in strength, high in rotating speed and high in generated magnetic field strength, the cost is reduced, the generating efficiency of the generator is greatly improved, and the magnetic flux of the yoke part of the rotor can be weakened due to the Halbach array arrangement of the first component unit and the second component unit, so that the yoke part can be used less or not used correspondingly, and the weight and the size of the generator are reduced.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (9)
1. A double layer permanent magnet axial flux generator permanent magnet rotor disk, comprising:
the carbon fiber restraining ring comprises an outer carbon fiber restraining ring and an inner carbon fiber restraining ring, the outer carbon fiber restraining ring and the inner carbon fiber restraining ring are coaxially arranged, the diameter of the outer carbon fiber restraining ring is larger than that of the inner carbon fiber restraining ring, and the thickness of the inner carbon fiber restraining ring is smaller than that of the outer carbon fiber restraining ring;
the permanent magnet ring comprises an outer layer permanent magnet ring and an inner layer permanent magnet ring, the outer layer permanent magnet ring and the inner layer permanent magnet ring are coaxially arranged, the diameter of the outer layer permanent magnet ring is larger than that of the inner layer permanent magnet ring, the permanent magnet ring and the carbon fiber constraint ring are coaxially arranged, and the permanent magnet ring and the carbon fiber constraint ring are arranged at intervals.
2. A double-layer permanent magnet axial flux generator permanent magnet rotor disk according to claim 1, wherein: at least one section of the outer-layer carbon fiber restraint ring is in a ring shape, the thickness of the outer-layer carbon fiber restraint ring is 15mm, and carbon fibers are laid in the outer-layer carbon fiber restraint ring along the tangential direction.
3. A double-layer permanent magnet axial flux generator permanent magnet rotor disk according to claim 1, wherein: at least one section of the inner-layer carbon fiber restraint ring is in a ring shape, the thickness of the inner-layer carbon fiber restraint ring is 10mm, and carbon fibers are laid in the inner-layer carbon fiber restraint ring along the tangential direction.
4. A double-layer permanent magnet axial flux generator permanent magnet rotor disk according to claim 1, wherein: the outer layer permanent magnet ring is composed of a plurality of arc short rod-shaped first composition units.
5. A double layer permanent magnet axial flux generator permanent magnet rotor disc according to claim 4, wherein: the inner layer permanent magnet ring is composed of a plurality of arc short rod-shaped second composition units.
6. A double-layer permanent magnet axial flux generator permanent magnet rotor disk according to claim 4, wherein: the outer layer permanent magnet ring is arranged between the outer layer carbon fiber restraining ring and the inner layer carbon fiber restraining ring.
7. A double layer permanent magnet axial flux generator permanent magnet rotor disc according to claim 3, wherein: the inner-layer carbon fiber restraint ring is arranged between the outer-layer permanent magnet ring and the inner-layer permanent magnet ring.
8. A double-layer permanent magnet axial flux generator permanent magnet rotor disk according to claim 5, wherein: the first composition unit and the second composition unit are arranged in a Halbach array mode.
9. A method of generating electricity, comprising the steps of:
providing an axial flux generator comprising a stator and a rotor disk, the rotor disk being as claimed in any one of claims 1 to 8;
the carbon fiber restraining ring is used for restraining and protecting the permanent magnet ring;
an axial magnetic field is generated by the permanent magnet ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211314885.3A CN115395752B (en) | 2022-10-26 | 2022-10-26 | Double-layer permanent magnet axial flux generator permanent magnet rotor disc and power generation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211314885.3A CN115395752B (en) | 2022-10-26 | 2022-10-26 | Double-layer permanent magnet axial flux generator permanent magnet rotor disc and power generation method |
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| Publication Number | Publication Date |
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| CN115395752A CN115395752A (en) | 2022-11-25 |
| CN115395752B true CN115395752B (en) | 2022-12-30 |
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| CN202211314885.3A Active CN115395752B (en) | 2022-10-26 | 2022-10-26 | Double-layer permanent magnet axial flux generator permanent magnet rotor disc and power generation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1304790A1 (en) * | 2001-10-18 | 2003-04-23 | "VLAAMSE INSTELLING VOOR TECHNOLOGISCH ONDERZOEK", afgekort "V.I.T.O." | An axial flux permanent magnet generator/motor |
| JP4561770B2 (en) * | 2007-04-27 | 2010-10-13 | ダイキン工業株式会社 | Axial gap type rotating electrical machine and manufacturing method thereof |
| US7714479B2 (en) * | 2007-09-19 | 2010-05-11 | Light Engineering, Inc. | Segmented composite rotor |
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