Motor and unmanned aerial vehicle

Abstract

The invention provides a motor and an unmanned aerial vehicle, the motor comprises a stator and a rotor, the stator generates a magnetic field to drive the rotor to rotate, the stator comprises a support and at least two coil layers, the support comprises an annular body and at least two winding layers arranged in parallel at intervals, and the winding layers are arranged on the annular body. Each winding layer is formed by a plurality of winding protrusions surrounding the outer surface of the body, the coil layers and the winding layers are in one-to-one correspondence, each coil layer comprises a plurality of coils, and the coils are wound on the winding protrusions. According to the motor, motor redundancy setting is adopted, when one coil breaks down, other coil layers can still work normally, the motor can work normally, normal flight of the unmanned aerial vehicle is not affected, reliability is improved, and danger is reduced.

Description

[Technical field]

[0001] The invention relates to a motor and an unmanned aerial vehicle using the motor. [Background technology]

[0002] The existing unmanned aerial vehicle industry is developing rapidly and is widely used in security, transportation, performance and other fields. Brushless motors, as important power output modules of unmanned aerial vehicles, play a very important role. However, due to problems with demand and usage environment, more and more problems are occurring in daily use. For example, untimely maintenance, harsh flight environment, excessive load during flight, etc., cause the brushless motor to overload and cause sudden failure of the brushless motor during operation. Unmanned aerial vehicles are unable to complete tasks such as security, transportation, and performances, have poor reliability, and may even explode or fall from high altitudes, posing a high risk. [Summary of the invention]

[0003] In view of the technical problems of poor reliability and high risk of motors in the prior art, the present invention provides a redundant motor and an unmanned aerial vehicle, which improves reliability and reduces risk by setting redundant motors.

[0004] A motor comprises a stator and a rotor, wherein the stator generates a magnetic field to drive the rotor to rotate, the stator comprises a bracket and at least two coil layers, the bracket comprises an annular body and at least two winding layers arranged in parallel and spaced apart, each of the winding layers is formed by a plurality of winding protrusions surrounding the outer surface of the body, the coil layers correspond to each other one by one, and each of the coil layers comprises a plurality of coils, and the coils are wound around the winding protrusions.

[0005] In some embodiments, at least two driving circuits are further included, each of the driving circuits being electrically connected to a corresponding coil layer and configured to drive the coil corresponding to the coil layer to be turned on or off.

[0006] In some embodiments, a control circuit is further included, and the control circuit is electrically connected to the drive circuit.

[0007] In some embodiments, the winding protrusion includes a winding arm and a limiting plate that are connected to each other, and the coil is wound around the winding arm and clamped between the main body and the limiting plate.

[0008] In some embodiments, the bracket is a magnetic conductor.

[0009] In some embodiments, the rotor includes a rotor seat and a magnet. The rotor seat cooperates with the motor seat to form a receiving space. The bracket and the coil layer are received in the receiving space. There are multiple magnets corresponding to the coils wound on the radial surface of the rotor seat.

[0010] In some embodiments, the rotor seat includes a rotor base and a rotor shell, the rotor shell is connected to the edge of the rotor base facing the motor seat and is arranged with a gap between the rotor base and the motor seat, and the magnet is arranged on the inner surface of the rotor shell.

[0011] In some embodiments, the motor seat includes a first side wall and a first bottom wall in a hollow ring shape, and the rotor seat includes a second side wall and a second bottom wall in a hollow ring shape, and the second side wall is inserted into the first side wall.

[0012] In some embodiments, a bearing assembly is further included, wherein the bearing assembly is sleeved on the second side wall and sandwiched between the first side wall and the second side wall.

[0013] An unmanned aerial vehicle comprises a frame, a motor and a propeller, wherein the frame supports and fixes the motor, the motor drives the propeller to rotate, the motor comprises a stator and a rotor, the stator generates a magnetic field to drive the rotor to rotate, the stator comprises a motor seat, a bracket and at least two coil layers, the bracket is arranged on the motor seat, comprises a connected annular body and at least two parallel and spaced winding layers, each of the winding layers is formed by a plurality of winding protrusions surrounding the outer surface of the body, the coil layers correspond to each other one by one, each of the coil layers comprises a plurality of coils, and the coils are wound around the winding protrusions.

[0014] Compared with the prior art, in the motor provided by the present invention, the bracket is provided with an annular body connected to each other and at least two winding layers arranged in parallel and spaced apart, each winding layer is formed by a plurality of winding protrusions surrounding the outer surface of the body, the coil layer corresponds to the winding layer one by one, each coil layer includes a plurality of coils, and the coils are wound around the winding protrusions. When one of the coil layers fails during the flight of the unmanned aerial vehicle, the other coil layers can still work normally, so that the motor works normally, the unmanned aerial vehicle flies normally, and the target task is successfully completed, the reliability is improved, and the danger is reduced.

Brief Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0016] Figure 1 A schematic diagram of a three-dimensional assembly structure of a motor provided by the present invention;

[0017] Figure 2 for Figure 1A schematic diagram of the three-dimensional exploded structure of the motor shown;

[0018] Figure 3 for Figure 2 A three-dimensional exploded schematic diagram of the support and coil layer shown;

[0019] Figure 4 for Figure 1 A cross-sectional view of the motor shown. [Specific implementation method]

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms of "a", "an" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0022] The present invention provides an unmanned aerial vehicle, the unmanned aerial vehicle comprises a frame, a motor 100, a propeller and a flight control, the frame supports and fixes the motor 100, the motor 100 is electrically connected to the flight control, the flight control controls the working state of the motor 100, and the motor 100 drives the propeller to rotate to realize the flight of the unmanned aerial vehicle. It can be understood that in the embodiment of the present invention, the unmanned aerial vehicle is a generalized unmanned aerial vehicle, including a drone.

[0023] See also Figure 1 and Figure 2 ,in, Figure 1 A schematic diagram of a three-dimensional assembly structure of a motor provided by the present invention, Figure 2 for Figure 1 The motor 100 comprises a stator 10 and a rotor 20 which are arranged in a coordinated manner. The stator 10 generates a magnetic field when energized, drives the rotor 20 to rotate, and converts electrical energy into mechanical energy.

[0024] The stator 10 includes a motor base 11, a bracket 13 and a coil layer 15. The bracket 13 is fixed to the motor base 11, and the coil layer 15 is fixed to the bracket 13. The motor base 11 includes a first side wall 111 and a first bottom wall 113 in a hollow ring shape. The first side wall 111 is disposed on the surface of the first bottom wall 113 facing the bracket 13. Figure 3 ,for Figure 2 The three-dimensional exploded schematic diagram of the bracket and the coil layer shown. The bracket 13 includes a connected annular body 131 and at least two parallel and spaced winding layers 133, and the body 131 is sleeved with the first side wall 111. Each of the winding layers 133 is formed by a plurality of winding protrusions 1331 surrounding the outer surface of the body 131. The winding protrusion 1331 includes a winding arm 13311 and a limiting plate 13313 that are connected and arranged. The number of the coil layers 15 is at least two, corresponding to the winding layers 133 one by one, and each of the coil layers 15 includes a plurality of coils 151, and the coils 151 are wound around the winding protrusions 1331, and the coils 151 correspond to the winding protrusions 1331 one by one, and the coils 15 are wound around the winding arms 13311, and sandwiched between the body 131 and the limiting plate 13313.

[0025] In order to reduce the weight of the motor 100, the first side wall 111 may be provided as a hollow structure, and the first bottom wall 113 may be provided with a hollow hole. The bracket 13 is preferably a magnetic conductor, specifically an iron core or a silicon steel sheet.

[0026] Please refer to Figure 2 and Figure 4 ,for Figure 1 The rotor 20 includes a rotor seat 21 and a magnet 23. The rotor seat 21 cooperates with the motor seat 11 to form a receiving space 201. The bracket 13 and the coil layer 15 are received in the receiving space 201. There are multiple magnets 23, which are wound around the radial surface of the rotor seat 21 corresponding to the coil 151.

[0027] It is understandable that the magnet 23 may be multi-layer or single-layer, as long as the magnetic field generated by the coil layer 15 can drive the magnet 23 to drive the rotor 20 to rotate. In this embodiment, the magnet 23 is a single layer, and in the radial direction of the rotor seat 21, the height of the magnet 23 corresponds to the arrangement of the at least two coil layers 15.

[0028] The rotor seat 21 includes a rotor base 211 and a rotor shell 213. The rotor base 211 includes a second side wall 2111 and a second bottom wall 2113 in a hollow ring shape. The second side wall 2111 is inserted into the first side wall 111. The rotor shell 213 is connected to the edge of the rotor base 211 facing the motor base 11, and is arranged with a gap between the motor base 11. The magnet 23 is arranged on the inner surface of the rotor shell 213. The rotor base 211 is provided with tooth-shaped protrusions 2115 corresponding to the magnet 23, and one magnet 23 is positioned and clamped between two adjacent tooth-shaped protrusions 2115.

[0029] The motor 100 also includes a control circuit and at least two drive circuits. The control circuit is electrically connected to the flight control, and the drive circuit is electrically connected to the control circuit. Each drive circuit is electrically connected to a corresponding coil layer 15 and is used to drive the coil 151 corresponding to the coil layer 15 to be turned on and off. The control circuit can control the at least two drive circuits to work in time-sharing or simultaneously.

[0030] Specifically, one coil layer 15 and one of the drive circuits connected to it constitute an independent magnetic field component. The drive circuit drives the coils 151 corresponding to the coil layer 15 to be turned on in sequence. The turned-on coils 151 generate a magnetic field, generate an attractive force and / or a repulsive force on the magnet 23, drive the magnet 23 to rotate in one direction, and drive the rotor 20 to rotate. When there are two or more coil layers 15, the motor 100 has two or more independent magnetic field components. When one of the magnetic field components fails due to excessive load and the coil 151 fails, the flight control can control the drive circuit corresponding to the failed coil layer 15 through the control circuit to shut down the failed coil layer 15, and control other drive circuits to start other normal coil layers 15. Of course, multiple coil layers 15 can also work at the same time. When each of the coil layers 15 fails, the other coil layers 15 can still work normally.

[0031] In some embodiments, the control circuit and the flight controller may be integrated into a same control board.

[0032] The motor 100 further includes a bearing assembly 30, which is sleeved on the second side wall 2111 and sandwiched between the first side wall 111 and the second side wall 2111. The bearing assembly 30 includes a first bearing 31, a second bearing 32 and a gasket 33. The first bearing 31 and the second bearing 32 are arranged opposite to each other, the first bearing 31 is sleeved on the end of the second side wall 2111 adjacent to the second bottom wall 2113, and the second bearing 32 is sleeved on the end of the second side wall 2111 adjacent to the first bottom wall 113. The first side wall 111 and the second side wall 2111 are provided with corresponding steps and anti-step structures to limit and fix the first bearing 31 and the second bearing 32. The gasket 33 is sleeved on the second side wall 2111 and overlapped on the surface of the second bearing 32 away from the first bearing 31.

[0033] Compared with the prior art, in the motor 100 provided by the present invention, the bracket 13 is provided with a connected annular body 131 and at least two parallel and spaced winding layers 133, each of which is formed by a plurality of winding protrusions 1331 surrounding the outer surface of the body 131, and the coil layer 15 corresponds to the winding layer 133 one by one, and each of the coil layers 15 includes a plurality of coils 151, and the coils 151 are wound around the winding protrusions 1331. When one of the coil layers 15 fails during the flight of the unmanned aerial vehicle, the other coil layers 15 can still work normally, so that the motor 100 works normally, the unmanned aerial vehicle flies normally, and the target task is successfully completed, thereby improving reliability and reducing danger.

[0034] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A motor, comprising a stator and a rotor, wherein the stator generates a magnetic field to drive the rotor to rotate, characterized in that: The stator comprises: The bracket comprises an annular body and at least two winding layers arranged in parallel and spaced apart, each of the winding layers being formed by a plurality of winding protrusions surrounding the outer surface of the body; At least two coil layers, the coil layers correspond to the winding layers one by one, each of the coil layers includes a plurality of coils, and the coils are wound around the winding protrusions.

2. The motor according to claim 1, characterized in that It also includes at least two driving circuits, each of which is electrically connected to one of the coil layers and is used to drive the coil corresponding to the coil layer to turn on and off.

3. The motor according to claim 2, characterized in that It also includes a control circuit, which is electrically connected to the drive circuit.

4. The motor according to claim 2, characterized in that The winding protrusion comprises a winding arm and a limiting plate which are connected to each other. The coil is wound around the winding arm and clamped between the body and the limiting plate.

5. The motor according to claim 1, characterized in that The bracket is a magnetic conductor.

6. The motor according to claim 1, characterized in that The rotor includes a rotor seat and a magnet. The rotor seat cooperates with the motor seat to form a receiving space. The bracket and the coil layer are received in the receiving space. There are multiple magnets, which are wound around the radial surface of the rotor seat corresponding to the coils.

7. The motor according to claim 6, characterized in that The rotor seat comprises a rotor base and a rotor shell. The rotor shell is connected to the edge of the rotor base facing the motor seat and is arranged with a gap between the rotor base and the motor seat. The magnet is arranged on the inner surface of the rotor shell.

8. The motor according to claim 6, characterized in that The motor seat comprises a first side wall and a first bottom wall in a hollow ring shape, and the rotor seat comprises a second side wall and a second bottom wall in a hollow ring shape, wherein the second side wall is inserted into the first side wall.

9. The motor according to claim 8, characterized in that It also includes a bearing assembly, which is sleeved on the second side wall and sandwiched between the first side wall and the second side wall.

10. An unmanned aerial vehicle, comprising: frame; Motor; and The propeller is supported and fixed by the frame, and the motor drives the propeller to rotate. The motor is characterized in that the motor is a motor as described in any one of claims 1-9.

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