Motor and unmanned aerial vehicle

Abstract

The utility model 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 motor base, a support and at least two coil layers, the support is arranged on the motor base and comprises an annular body and at least two winding layers, the annular body is connected with the winding layers, and the winding layers are arranged in parallel at intervals. 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. The motor provided by the utility model adopts motor redundancy arrangement, and when one coil breaks down, other coil layers can still work normally, so that the motor works normally, normal flight of the unmanned aerial vehicle is not influenced, the reliability is improved, and the danger is reduced.

Description

[Technical Field]

[0001] This utility model relates to an electric motor and an unmanned aerial vehicle using the electric motor. [Background Technology]

[0002] The unmanned aerial vehicle (UAV) industry is developing rapidly and is widely used in security, transportation, performance and other fields. Brushless motors, as an important power output module of UAVs, play a very important role. However, due to the demands and the operating environment, more and more problems are occurring in daily use. For example, problems such as untimely maintenance, excessively harsh flight environments, and excessive loads during flight can cause brushless motors to overload and suddenly fail during operation. This can prevent the UAV from completing security, transportation, performance and other tasks, resulting in poor reliability and even crashes, high-altitude falls, and high danger. [Utility Model Content]

[0003] To address the technical problems of poor motor reliability and high risk in existing technologies, this utility model provides a redundant motor and unmanned aerial vehicle. By setting up motor redundancy, reliability is improved and risk is reduced.

[0004] An electric motor includes a stator and a rotor. The stator generates a magnetic field to drive the rotor to rotate. The stator includes a motor base, a support, and at least two coil layers. The support is disposed on the motor base and includes a connected annular body and at least two parallel and spaced winding layers. Each winding layer is formed by multiple winding protrusions surrounding the outer surface of the body. The coil layers correspond one-to-one with the winding layers. Each coil layer includes multiple coils, and the coils are wound around the winding protrusions.

[0005] In some embodiments, at least two driving circuits are also included, 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.

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

[0007] In some embodiments, the winding protrusion includes a winding arm and a limiting plate connected together, and the coil is wound on the winding arm and sandwiched between the body and the limiting plate.

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

[0009] In some embodiments, the rotor includes a rotor base and magnets, the rotor base and the motor base forming a receiving space, the bracket and the coil layer are received in the receiving space, and there are multiple magnets, which are wound around the radial surface of the rotor base corresponding to the coils.

[0010] In some embodiments, the rotor base includes a rotor base and a rotor housing, the rotor housing being connected to the edge of the rotor base facing the motor base and being spaced apart from the motor base, and the magnet being disposed on the inner surface of the rotor housing.

[0011] In some embodiments, the motor mount includes a first sidewall and a first bottom wall in a hollow annular shape, and the rotor mount includes a second sidewall and a second bottom wall in a hollow annular shape, with the second sidewall inserted into the first sidewall.

[0012] In some embodiments, a bearing assembly is also included, which is sleeved on the second sidewall and sandwiched between the first sidewall and the second sidewall.

[0013] An unmanned aerial vehicle (UAV) includes a frame, a motor, and a propeller. The frame supports and fixes the motor, and the motor drives the propeller to rotate. The motor includes a stator and a rotor. The stator generates a magnetic field to drive the rotor to rotate. The stator includes a motor base, a bracket, and at least two coil layers. The bracket is disposed on the motor base and includes a connected annular body and at least two parallel and spaced winding layers. Each winding layer is formed by multiple winding protrusions surrounding the outer surface of the body. The coil layers correspond one-to-one with the winding layers, and each coil layer includes multiple coils wound around the winding protrusions.

[0014] Compared to existing technologies, the motor provided by this invention features a bracket with a connected annular body and at least two parallel, spaced-apart winding layers. Each winding layer is formed by multiple winding protrusions surrounding the outer surface of the body. Each coil layer corresponds one-to-one with the winding layers, and each coil layer includes multiple coils wound around the winding protrusions. When one coil layer fails during unmanned aerial vehicle (UAV) flight, the other coil layers can still function normally, ensuring the motor operates correctly, the UAV flies normally, and the target mission is successfully completed, improving reliability and reducing risk. [Attached Image Description]

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0016] Figure 1 A three-dimensional assembly structure diagram of an electric motor provided by this utility model;

[0017] Figure 2 for Figure 1 A three-dimensional exploded view of the motor shown.

[0018] Figure 3 for Figure 2 An exploded 3D view of the support and coil layer shown;

[0019] Figure 4 for Figure 1 The image shows a cross-sectional view of the motor.

Detailed Implementation Methods

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] The terminology used in the embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. The singular forms "a" and "the" as used in the embodiments of this utility model and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0022] This utility model provides an unmanned aerial vehicle (UAV) comprising a frame, a motor 100, a propeller, and a flight controller. The frame supports and fixes the motor 100, which is electrically connected to the flight controller. The flight controller controls the operating state of the motor 100, and the motor 100 drives the propeller to rotate, thereby enabling the UAV to fly. It is understood that in this embodiment of the utility model, the UAV is a broad term encompassing unmanned aerial vehicles (UAVs).

[0023] Please see Figure 1 and Figure 2 ,in, Figure 1 This is a schematic diagram of a three-dimensional assembly structure of a motor provided by this utility model. Figure 2 for Figure 1 The diagram shows an exploded three-dimensional structure of the motor. The motor 100 includes a stator 10 and a rotor 20 that are configured to work together. When the stator 10 is energized, it generates a magnetic field that drives the rotor 20 to rotate, converting 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 hollow annular first sidewall 111 and a first bottom wall 113. The first sidewall 111 is disposed on the surface of the first bottom wall 113 facing the bracket 13. (See also...) Figure 3 ,for Figure 2 The diagram shows an exploded perspective view of the support and coil layers. The support 13 includes a connected annular body 131 and at least two parallel and spaced-apart winding layers 133. The body 131 is fitted with the first sidewall 111. Each winding layer 133 is formed by multiple winding protrusions 1331 surrounding the outer surface of the body 131. Each winding protrusion 1331 includes a winding arm 13311 and a limiting plate 13313 connected together. There are at least two coil layers 15, corresponding one-to-one with the winding layers 133. Each coil layer 15 includes multiple coils 151, which are wound around the winding protrusions 1331. The coils 151 are wound around the winding arms 13311 and sandwiched between the body 131 and the limiting plate 13313.

[0025] To reduce the weight of the motor 100, the first sidewall 111 can be a hollow structure, and the first bottom wall 113 can have perforated holes. The bracket 13 is preferably a magnetic conductor, specifically an iron core or silicon steel sheet.

[0026] Please refer to the following: Figure 2 and Figure 4 ,for Figure 1 The diagram shows a cross-sectional view of the motor. The rotor 20 includes a rotor base 21 and magnets 23. The rotor base 21, together with the motor base 11, forms 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 base 21 corresponding to the coils 151.

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

[0028] The rotor base 21 includes a rotor base 211 and a rotor shell 213. The rotor base 211 includes a hollow annular second sidewall 2111 and a second bottom wall 2113, with the second sidewall 2111 inserted into the first sidewall 111. The rotor shell 213 is connected to the edge of the rotor base 211 facing the motor base 11 and is spaced apart from the motor base 11. The magnet 23 is disposed on the inner surface of the rotor shell 213. The rotor base 211 has toothed protrusions 2115 corresponding to the magnet 23, with one magnet 23 positioned and clamped between two adjacent toothed 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 controller, and the drive circuit is electrically connected to the control circuit. Each drive circuit is electrically connected to a coil layer 15 to drive the coil 151 corresponding to the coil layer 15 to turn on and off. The control circuit can control the at least two drive circuits to work in a time-sharing manner or work simultaneously.

[0030] Specifically, each coil layer 15 and its corresponding connected drive circuit constitute an independent magnetic field component. The drive circuit drives the coils 151 corresponding to the coil layer 15 to conduct sequentially. The conducting coils 151 generate a magnetic field, which attracts and / or repels the magnet 23, driving the magnet 23 to rotate in one direction, thereby rotating the rotor 20. When there are two or more coil layers 15, the motor 100 has two or more independent magnetic field components. When one magnetic field component fails due to excessive load, the flight controller can use the control circuit to control the drive circuit corresponding to the failed coil layer 15 to shut down the failed coil layer 15, and control other drive circuits to start the other normal coil layers 15. Of course, multiple coil layers 15 can also work simultaneously. When one 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 can be integrated into the same control board.

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

[0033] Compared to existing technologies, the motor 100 provided by this utility model features a bracket 13 with a connected annular body 131 and at least two parallel and spaced winding layers 133. Each winding layer 133 is formed by multiple winding protrusions 1331 surrounding the outer surface of the body 131. A coil layer 15 corresponds one-to-one with each winding layer 133, and each coil layer 15 includes multiple coils 151 wound around the winding protrusions 1331. When one coil layer 15 fails during unmanned aerial vehicle (UAV) flight, the other coil layers 15 can still function normally, ensuring the motor 100 operates normally, the UAV flies normally, successfully completes its target mission, improves reliability, and reduces risk.

[0034] The above description is merely an embodiment of this utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this utility model, but these improvements all fall within the protection scope of this utility model.

Claims

1. An electric 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 includes: Motor mount; The bracket, located on the motor base, includes a connected annular body and at least two parallel and spaced winding layers, each of the winding layers being formed by multiple winding protrusions surrounding the outer surface of the body; There are at least two coil layers, each corresponding to a winding layer, and each coil layer includes multiple coils wound on the winding protrusion.

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

4. The motor as described in claim 2, characterized in that, The winding protrusion includes a winding arm and a limiting plate connected together. The coil is wound on the winding arm and sandwiched between the body and the limiting plate.

5. The motor as described in claim 1, characterized in that, The support is a magnetic conductor.

6. The motor as described in claim 1, characterized in that, The rotor includes a rotor base and magnets. The rotor base, together with the motor base, forms a receiving space. The bracket and the coil layer are housed in the receiving space. There are multiple magnets, which are wound around the radial surface of the rotor base corresponding to the coils.

7. The motor as described in claim 6, characterized in that, The rotor housing includes a rotor base and a rotor shell. The rotor shell is connected to the edge of the rotor base facing the motor base and is spaced apart from the motor base. The magnet is disposed on the inner surface of the rotor shell.

8. The motor as described in claim 6, characterized in that, The motor mount includes a first sidewall and a first bottom wall that are hollow and annular in shape, and the rotor mount includes a second sidewall and a second bottom wall that are hollow and annular in shape, with the second sidewall inserted into the first sidewall.

9. The motor as described in claim 8, characterized in that, It also includes a bearing assembly, which is sleeved on the second sidewall and sandwiched between the first sidewall and the second sidewall.

10. An unmanned aerial vehicle, comprising: frame; Electric motor; and A propeller, wherein the frame supports and fixes the motor, and the motor drives the propeller to rotate, characterized in that the motor is a motor as described in any one of claims 1-9.

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