CN109347292B - Unmanned aerial vehicle is with no iron core disc motor - Google Patents
Unmanned aerial vehicle is with no iron core disc motor Download PDFInfo
- Publication number
- CN109347292B CN109347292B CN201811310722.1A CN201811310722A CN109347292B CN 109347292 B CN109347292 B CN 109347292B CN 201811310722 A CN201811310722 A CN 201811310722A CN 109347292 B CN109347292 B CN 109347292B
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- Prior art keywords
- disc
- unmanned aerial
- aerial vehicle
- end cover
- motor
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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
Abstract
The invention discloses an iron-core-free disc type motor for an unmanned aerial vehicle, which comprises a base disc, a stator armature disc, an end cover disc and a plurality of permanent magnets, wherein the base disc is connected with a fixed assembly of the unmanned aerial vehicle, and the stator armature disc is coaxially fixed on the base disc; the outer side of the end cover plate is fixedly connected with a component to be driven of the unmanned aerial vehicle; the permanent magnets are arranged opposite to the stator armature disc, the permanent magnets are uniformly adhered to the inner side of the end cover disc at intervals along the circumferential direction of the end cover disc, and the N poles and the S poles of the permanent magnets are sequentially and uniformly distributed in an alternating mode; the permanent magnets are of unequal thicknesses and are magnetized along the axial direction of the end cover disc. The invention has the beneficial effects that: the invention adopts the permanent magnets with different thicknesses to be alternately distributed, thereby greatly reducing the harmonic phenomenon of the coreless disk type motor, further reducing the noise generated during driving and ensuring the motor to run more reliably.
Description
Technical Field
The invention relates to a coreless disk type motor, in particular to a coreless disk type motor for an unmanned aerial vehicle.
Background
The operation of unmanned aerial vehicle needs efficient driving motor to drive the rotor to rotate at a high speed, and this has harsher requirement to driving motor's weight and axial length. At present, a radial flux motor is commonly used as a main driving motor of an unmanned aerial vehicle, although the main driving motor can meet performance requirements, the unmanned aerial vehicle is heavy in weight and long in axial size, and is not suitable for occasions with high requirements on weight and volume, so that the development of the field of the unmanned aerial vehicle is severely limited; the common disc type motor can meet the requirement of short axial size, but has low efficiency, serious magnetic flux leakage and low performance; the common coreless disk type motor has the advantages of small mass, reasonable axial size, serious harmonic phenomenon, high noise, low magnetic energy utilization rate and low efficiency, and is not suitable for the field of unmanned aerial vehicles with high performance requirements on driving motors.
Disclosure of Invention
The invention aims to provide an iron-core-free disc type motor for an unmanned aerial vehicle, which is low in noise and high in stability, aiming at the defects of the prior art.
The technical scheme adopted by the invention is as follows: an iron-core-free disc type motor for an unmanned aerial vehicle comprises a base disc, a stator armature disc, an end cover disc and a plurality of permanent magnets, wherein the base disc is connected with a fixed assembly of the unmanned aerial vehicle, and the stator armature disc is coaxially fixed on the base disc; the outer side of the end cover plate is fixedly connected with a component to be driven of the unmanned aerial vehicle; the permanent magnets are arranged opposite to the stator armature disc, the permanent magnets are uniformly adhered to the inner side of the end cover disc at intervals along the circumferential direction of the end cover disc, and the N poles and the S poles of the permanent magnets are sequentially and uniformly distributed in an alternating mode; the permanent magnets are of unequal thicknesses and are magnetized along the axial direction of the end cover disc.
According to the scheme, the whole permanent magnet is of a T-shaped structure, and the ratio of the thickness of the two ends of the permanent magnet to the thickness of the middle part of the permanent magnet is 1: 2.
According to the scheme, the peripheral surface of the end cover disc extends downwards, the magnetic isolating ring is fixed on the inner wall of the extending section, the inner ring of the magnetic isolating ring is adhered to the outer wall surface of the permanent magnet, and the permanent magnet is adhered to the end cover disc while being tightly adhered to the magnetic isolating ring; the magnetism isolating ring is made of a non-magnetic material.
According to the scheme, the inner side of the stator armature disk is provided with a coaxial annular groove, and the annular groove is internally fixed with the magnetic adjusting ring.
According to the scheme, the end cover disc, the magnetism isolating ring and the permanent magnet form a motor rotor; the stator armature plate, the base plate and the magnetic adjusting ring form a motor stator, and no mechanical contact exists between the motor stator and the rotor.
According to the scheme, the magnetic adjusting ring comprises a plurality of magnetic conducting blocks and non-magnetic conducting blocks which are sequentially connected, and the magnetic conducting blocks and the non-magnetic conducting blocks are uniformly and alternately arranged at intervals.
According to the scheme, an axial air gap is arranged between the permanent magnet and the magnetic adjusting ring.
According to the scheme, the number Z of the magnetic conduction blocks and the pole pair number P of the permanent magnetsbArmature winding pole pair number P of stator armature platerThe three should satisfy the following relations:
Z＝Pb+Pr。
according to the scheme, the stator armature plate is formed by filling a wound armature winding, the armature winding is a three-phase winding, and the stator armature plate is wound by a 24-slot 8-pole single-layer chain winding method.
According to the scheme, a plurality of bolt holes are formed in the outer side of the end cover plate along the circumferential direction, and the end cover plate is fixedly connected with the to-be-driven assembly of the unmanned aerial vehicle through bolts.
The invention has the beneficial effects that:
1. the invention adopts the permanent magnets with different thicknesses to be alternately distributed, thereby greatly reducing the harmonic phenomenon of the coreless disk type motor, further reducing the noise generated during driving and ensuring the motor to run more reliably.
2. Compared with the traditional surface-mounted permanent magnet, the surface-mounted permanent magnet has the advantages that the magnetic isolation ring is additionally arranged for auxiliary fixation, the permanent magnet is supported while the magnetic isolation effect is achieved, the danger caused by overlarge centrifugal force of the permanent magnet due to high speed is reduced, and the safety of the motor is improved.
3. According to the invention, the magnetic adjusting ring is introduced, and modulates the magnetic field of the motor, and simulation results show that compared with a motor without the magnetic adjusting ring, the motor has the advantages of small magnetic linkage distortion change and higher stability;
4. the stator and the rotor are not in mechanical contact and fixed without a shell, the stator and the rotor can be flexibly fixed in an unmanned aerial vehicle assembly, and the assembly is more flexible;
5. the coreless disk type motor for the unmanned aerial vehicle is flexible to assemble, low in noise and reliable in operation, and solves the problem that a common coreless disk type motor cannot be applied to the unmanned aerial vehicle.
Drawings
FIG. 1 is an assembly view of a body of an embodiment of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a partially enlarged view of an assembly portion of the present embodiment.
Fig. 4 is a schematic diagram of the connection between the magnetic adjusting ring and the permanent magnet in this embodiment.
FIG. 5 is a comparison diagram of no-load flux linkage simulation of the motor of the present invention and a motor using a common permanent magnet motor and without a flux adjusting ring under the same conditions.
Wherein: 1. a chassis tray; 2. an end cap plate; 3. a magnetism isolating ring; 4. a permanent magnet; 5. a stator armature plate; 6. a first adhesive layer; 7. a second adhesive layer; 8. adjusting a magnetic ring; 9. a magnetic conduction block; 10. a non-magnetic conductive block.
Detailed Description
For a better understanding of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings and examples.
As shown in fig. 1 to 3, the coreless disk motor for the unmanned aerial vehicle comprises a base disk 1, a stator armature disk 5, an end cover disk 2 and a plurality of permanent magnets 4, wherein the base disk is connected with a fixed component of the unmanned aerial vehicle, the stator armature disk 5 is coaxially fixed on the base disk 1 (the outer side of the stator armature disk 5 is fixedly connected with the base disk 1 through a second adhesive layer 7), the stator armature disk 5 is formed by filling a wound armature winding, the armature winding is a three-phase winding, and the winding is performed according to a 24-slot 8-pole single-layer chain winding method; a plurality of bolt holes are formed in the outer side of the end cover disc 2 along the circumferential direction, and the end cover disc 2 is fixedly connected with a component to be driven of the unmanned aerial vehicle through bolts; the permanent magnets 4 are arranged opposite to the stator armature disc 5, the permanent magnets 4 are uniformly adhered to the inner side of the end cover disc 1 at intervals along the circumferential direction of the end cover disc 1 (adhered through the first adhesive layer 6), and the N poles and the S poles of the permanent magnets 4 are sequentially and uniformly distributed in an alternating mode; the permanent magnets 4 are unequal-thickness permanent magnets, and the permanent magnets 4 are magnetized along the axial direction of the end cover disc. In the embodiment, the permanent magnet 4 is integrally in a T-shaped structure, and after simulation optimization, when the ratio of the thickness of the two ends of the permanent magnet 4 to the thickness of the middle part of the permanent magnet 4 is 1:2, the change of the flux linkage distortion of the motor is small, and the stability is higher.
Preferably, the peripheral surface of the end cover disc 2 extends downwards, a magnetism isolating ring 3 (which can be pasted) is fixed on the inner wall of the extending section, the inner ring of the magnetism isolating ring 3 is pasted with the outer wall surface of a permanent magnet 4, and the permanent magnet 4 is closely attached to the magnetism isolating ring 3 and is simultaneously pasted with the end cover disc 2; the magnetism isolating ring 3 is made of light non-magnetic material and plays a role in isolating magnetism and supporting the permanent magnet 4.
Preferably, a coaxial annular groove is formed in the inner side of the stator armature disc 5, and a magnet adjusting ring 8 (capable of being bonded) is fixed in the annular groove; as shown in fig. 4, the magnetic adjusting ring 8 includes a plurality of magnetic conductive blocks 9 and non-magnetic conductive blocks 10 connected in sequence, the magnetic conductive blocks 9 and the non-magnetic conductive blocks 10 are uniformly and alternately arranged, and the magnetic adjusting ring 8 and the permanent magnet 4 are arranged in an axially opposite manner. In this embodiment, the magnetic blocks 9 and the non-magnetic blocks 10 are 8 blocks. The number Z of the magnetic conduction blocks 9 on the magnetic regulation ring 8 and the pole pair number P of the permanent magnet 4bThe stator is provided withNumber of pole pairs P of armature winding on the armature plate 5rThe three should satisfy the following relations:
Z＝Pb+Pr。
in the invention, all components are coaxially assembled; the end cover disc 2, the magnetism isolating ring 3 and the permanent magnet 4 form a motor rotor for outputting torque; the stator armature plate 5, the base plate 1 and the magnetic adjusting ring 8 form a motor stator; the stator armature plate 5 is provided with a plurality of through holes for arranging Hall sensors, and the stator armature plate is connected with a control system through the Hall sensors. No mechanical contact exists between motor stator and rotor, and the motor does not have the shell, can settle stator and rotor on the unmanned aerial vehicle subassembly in a flexible way. An air gap is arranged between the motor stator and the motor rotor, namely an axial air gap is arranged between the permanent magnet 4 and the magnetic adjusting ring 8, and the size of the air gap influences the output torque of the motor. Air gap length is rationally set according to unmanned aerial vehicle actual performance requirement and dimensional requirement.
The working principle of the invention is as follows: the stator armature disk 5 on the stator provides armature magnetic field by three-phase current, the permanent magnet 4 on the rotor provides main magnetic field, the magnetic adjusting ring 8 modulates the two magnetic fields, so that the modulated harmonic wave interacts with the other side to generate torque to provide output. The permanent magnets 4 are unequal-thickness permanent magnets, unequal thickness degrees are reasonably set, and the modulation of the modulation ring magnetic field effectively reduces the harmonic phenomenon of the motor, so that the motor runs more stably and the noise is lower. Fig. 5 shows a comparison graph of no-load flux linkage simulation of the motor using the permanent magnets of different thicknesses and the motor using the common permanent magnet motor without the flux adjusting ring under the same conditions, and it can be seen from the graph that the motor (prototype in the figure) of the present invention can effectively reduce the flux linkage distortion of the motor, the waveform of the motor flux linkage is smoother, the harmonic phenomenon of the motor is smaller, and the present invention plays an important role in the subsequent drive control of the motor, compared with the other two motors.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications can be made to the technical solutions described in the above-mentioned embodiments, or equivalent substitutions of some technical features, but any modifications, equivalents, improvements and the like within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (9)
1. An iron-core-free disc type motor for an unmanned aerial vehicle is characterized by comprising a base disc, a stator armature disc, an end cover disc and a plurality of permanent magnets, wherein the base disc is connected with a fixed assembly of the unmanned aerial vehicle, and the stator armature disc is coaxially fixed on the base disc; the outer side of the end cover plate is fixedly connected with a component to be driven of the unmanned aerial vehicle; the permanent magnets are arranged opposite to the stator armature disc, the permanent magnets are uniformly adhered to the inner side of the end cover disc at intervals along the circumferential direction of the end cover disc, and the N poles and the S poles of the permanent magnets are sequentially and uniformly distributed in an alternating mode; the permanent magnets are of unequal thicknesses and are magnetized along the axial direction of the end cover disc; the whole permanent magnet is of a T-shaped structure, and the ratio of the thickness of two ends of the permanent magnet to the thickness of the middle part of the permanent magnet is 1: 2.
2. The coreless disc motor for the unmanned aerial vehicle as claimed in claim 1, wherein an outer peripheral surface of the end cover disc extends downward, a magnetism isolating ring is fixed to an inner wall of the extension section, an inner ring of the magnetism isolating ring is adhered to an outer wall surface of the permanent magnet, and the permanent magnet is adhered to the end cover disc while being tightly adhered to the magnetism isolating ring; the magnetism isolating ring is made of a non-magnetic material.
3. The coreless disc motor for the unmanned aerial vehicle as claimed in claim 1, wherein a coaxial annular groove is formed at an inner side of the stator armature disc, and a magnet adjusting ring is fixed in the annular groove.
4. The coreless disc motor for the unmanned aerial vehicle of claim 1, wherein the end cover disc, the magnetism isolating ring and the permanent magnet constitute a motor rotor; the stator armature plate, the base plate and the magnetic adjusting ring form a motor stator, and no mechanical contact exists between the motor stator and the rotor.
5. The coreless disc motor for the unmanned aerial vehicle as claimed in claim 3, wherein the flux adjusting ring includes a plurality of magnetic conductive blocks and non-magnetic conductive blocks connected in sequence, and the magnetic conductive blocks and the non-magnetic conductive blocks are arranged at regular intervals alternately.
6. The coreless disc motor for the unmanned aerial vehicle of claim 3, wherein an axial air gap is provided between the permanent magnet and the magnetic adjusting ring.
7. The coreless disc motor for the unmanned aerial vehicle of claim 3, wherein the number Z of the magnetic conduction blocks and the number P of pole pairs of the permanent magnetsbArmature winding pole pair number P of stator armature platerThe three should satisfy the following relations:
Z＝Pb+Pr。
8. the coreless disk type motor for the unmanned aerial vehicle of claim 1, wherein the stator armature disk is formed by filling a wound armature winding, the armature winding is a three-phase winding, and the armature winding is wound by a 24-slot 8-pole single-layer chain winding method.
9. The coreless disc type motor for the unmanned aerial vehicle according to claim 1, wherein a plurality of bolt holes are formed in the outer side of the end cover disc along the circumferential direction, and the end cover disc is fixedly connected with a component to be driven of the unmanned aerial vehicle through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811310722.1A CN109347292B (en) | 2018-11-06 | 2018-11-06 | Unmanned aerial vehicle is with no iron core disc motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811310722.1A CN109347292B (en) | 2018-11-06 | 2018-11-06 | Unmanned aerial vehicle is with no iron core disc motor |
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| CN109347292A CN109347292A (en) | 2019-02-15 |
| CN109347292B true CN109347292B (en) | 2020-05-26 |
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| CN201811310722.1A Active CN109347292B (en) | 2018-11-06 | 2018-11-06 | Unmanned aerial vehicle is with no iron core disc motor |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356705A (en) * | 2015-12-01 | 2016-02-24 | 北京爱尼机电有限公司 | Coreless multilayer disc type motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001211623A (en) * | 2000-12-21 | 2001-08-03 | Nitto Zoki Kk | Flat motor |
| CN202017579U (en) * | 2011-05-05 | 2011-10-26 | 北京石光龙腾风力科技发展有限公司 | Double disk type wind driven generator |
| CN104467343B (en) * | 2014-11-27 | 2017-08-11 | 金陵科技学院 | A kind of tubular pole combination linear electric generator |
| CN106374702B (en) * | 2016-11-11 | 2018-07-10 | 哈尔滨理工大学 | Disc type iron core-free Flux modulation motor |
| CN206894380U (en) * | 2017-07-03 | 2018-01-16 | 苏州英磁新能源科技有限公司 | A kind of new fixing groove disk type electric motor rotor and motor |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356705A (en) * | 2015-12-01 | 2016-02-24 | 北京爱尼机电有限公司 | Coreless multilayer disc type motor |
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