CN221305717U - High-efficiency energy-saving brushless direct current motor for long-endurance unmanned aerial vehicle - Google Patents
High-efficiency energy-saving brushless direct current motor for long-endurance unmanned aerial vehicle Download PDFInfo
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- CN221305717U CN221305717U CN202323174282.0U CN202323174282U CN221305717U CN 221305717 U CN221305717 U CN 221305717U CN 202323174282 U CN202323174282 U CN 202323174282U CN 221305717 U CN221305717 U CN 221305717U
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- 238000004804 winding Methods 0.000 claims abstract description 21
- 239000000446 fuel Substances 0.000 claims abstract description 16
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 239000003921 oil Substances 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 4
- NVTIURDDNOGLPS-UHFFFAOYSA-N [Pr].[Sm].[Co] Chemical compound [Pr].[Sm].[Co] NVTIURDDNOGLPS-UHFFFAOYSA-N 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 239000000306 component Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- Brushless Motors (AREA)
Abstract
The utility model provides a high-efficiency energy-saving brushless direct current motor for a long-endurance unmanned aerial vehicle, which comprises a shell, and a stator, a rotor shaft and a rotor position sensor which are arranged in the shell, wherein the stator comprises a stator iron core and a stator winding; the front end and the rear end of the rotor shaft are respectively supported with a bearing, and the bearings are made of ceramic materials; the rear end of the rotor shaft extends out of the bearing and is provided with a tracking magnetic ring, and the position sensor is arranged in the rear end cover of the shell and corresponds to the position of the tracking magnetic ring; the gap between the rotor shaft and the shell can be filled with fuel, and the cavity in the rotor shaft can be filled with fuel. By adopting the technical scheme of the utility model, the efficiency of the unmanned aerial vehicle motor can be improved, and the endurance of the unmanned aerial vehicle can be improved.
Description
Technical Field
The utility model relates to the technical field of brushless direct current motors, in particular to a high-efficiency energy-saving brushless direct current motor for a long-endurance unmanned aerial vehicle.
Background
The unmanned aerial vehicle is an unmanned aerial vehicle operated by using radio remote control equipment and a self-provided program control device, has the advantages of small volume, low manufacturing cost, convenient use, low environmental requirement, stronger survivability and the like, and has wide application in industries of police, urban management, agriculture, geology, weather, electric power, rescue and relief work, video shooting and the like.
The motor for the unmanned aerial vehicle is one of core components of the unmanned aerial vehicle, so that the power and the flight performance of the unmanned aerial vehicle are determined, and the speed of the unmanned aerial vehicle can be limited due to the narrow rotating speed range of the alternating current motor, and the unmanned aerial vehicle mainly adopts a direct current motor. At present, no matter the unmanned aerial vehicle motor is a permanent magnet motor or a brushless motor, most unmanned aerial vehicles have the problem that the efficiency of the motor is low due to factors such as electromagnetic structures, output torque, friction loss and the like, so that the endurance of the unmanned aerial vehicle is weak.
Disclosure of utility model
In order to better solve the problems, the utility model provides the efficient energy-saving brushless direct current motor for the long-endurance unmanned aerial vehicle, so as to improve the efficiency of the unmanned aerial vehicle and the endurance of the unmanned aerial vehicle.
In order to achieve the above purpose, the embodiment of the utility model provides a high-efficiency energy-saving brushless direct current motor for a long-endurance unmanned aerial vehicle, which comprises a shell, a stator, a rotor shaft and a rotor position sensor, wherein the stator is arranged in the shell, the stator comprises a stator core and a stator winding, the rotor comprises a rotor core and rotor magnetic steel, the stator core, the stator winding and the rotor core are made of silicon steel sheet materials, and the rotor magnetic steel is made of samarium praseodymium cobalt magnetic steel; the front end and the rear end of the rotor shaft are respectively supported with a bearing, and the bearings are made of ceramic materials; the rear end of the rotor shaft extends out of the bearing and is provided with a tracking magnetic ring, and the rotor position sensor is arranged in the rear end cover of the shell and corresponds to the position of the tracking magnetic ring; the front end of the rotor shaft extends out of a through hole formed in the middle of a front end cover of the shell, and the inner diameter of the through hole is larger than the outer diameter of the corresponding rotor shaft, so that a gap is formed between the through hole and the rotor shaft; the rotor shaft is of a hollow structure, a gap is formed between the rear end of the rotor shaft and the rear end cover, so that a cavity in the rotor shaft is communicated with the gap; the space can be connected with the pump oil port of the fuel pump of the communication oil tank on the unmanned aerial vehicle, and the cavity in the rotor shaft can be connected with the oil pumping port of the oil pump of the communication oil tank on the unmanned aerial vehicle.
Optionally, a front sealing ring is arranged at the joint of the front end cover and the gap of the shell and the fuel pump, and a rear sealing ring is arranged at the joint of the rear end cover and the shell.
Optionally, front end rings and rear end rings are respectively arranged at two ends of the rotor core and the rotor magnetic steel.
Optionally, a rotor sheath is further arranged on the outer side of the rotor magnetic steel.
Optionally, the stator winding is in an octal nine-slot form, and the working mode is a star-shaped three-phase six-state.
The high-efficiency energy-saving brushless direct current motor for the long-endurance unmanned aerial vehicle can reduce hysteresis loss and eddy current loss of the motor through scientific and reasonable electromagnetic design; moreover, the bearing supported by the ceramic material can reduce the friction resistance of the bearing, thereby reducing friction loss, preventing the rotor position from shifting, ensuring the motor to run more stably and improving the motor efficiency; the stator iron core, the stator winding and the rotor iron core are made of silicon steel sheet materials, and the tile-shaped magnetic steel made of samarium praseodymium cobalt magnetic steel materials is adopted, so that the iron loss and copper loss of the motor can be reduced, and the energy-saving effect is achieved; and aviation fuel is introduced into the motor to realize oil cooling heat dissipation and bearing lubrication, so that friction loss is further reduced, and efficiency is improved.
The brushless direct current motor has the characteristics of high efficiency, energy saving, high rotating speed, long service life, small volume, light weight, stable rotating speed and the like.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a high-efficiency energy-saving brushless dc motor for a long-endurance unmanned aerial vehicle according to an embodiment of the present utility model;
Fig. 2 is a schematic diagram of stator winding connection according to an embodiment of the present utility model.
Reference numerals:
1. a housing; 2. a stator core; 3. a front seal ring; 4. a rotor shaft; 5. a bearing; 6. a front end ring; 7. a rotor core; 8. rotor magnetic steel; 9. a sheath; 10. a rear end cover; 11. a rear seal ring; 13. a cover plate; 14. tracking a magnetic ring; 15. a rear end ring; 16. and a stator winding.
Description of the embodiments
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The utility model can be practiced in many other ways than those herein described and similar modifications can be made by those skilled in the art without departing from the spirit of the utility model, and therefore the utility model is not limited to the practice of the substrate disclosed below.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
As shown in fig. 1-2, the high-efficiency energy-saving brushless direct current motor for the long-endurance unmanned aerial vehicle in the embodiment of the utility model comprises a shell 1, and a stator, a rotor shaft 4 and a rotor position sensor which are arranged in the shell 1.
Wherein, the front end of the shell 1 is an integral end cover, and the rear end is a detachable rear end cover 10; in the housing 1, the rotor shaft 4 is located at a middle position of the housing 1, a front end of the rotor shaft 4 protrudes from an opening in a middle portion of the front end of the housing 1, and a rear end of the rotor shaft 4 is supported at the rear end cover 10. And bearings 5 are provided at the joints of the front and rear ends of the rotor shaft 4 with the front and rear end caps 10 of the housing 1 for supporting the rotor shaft 4, and the front and rear ends of the rotor shaft 4 extend out of the bearings 5. In the embodiment, the bearing 5 is made of ceramic materials, so that magnetic field resistance of the metal bearing due to magnetic field of the motor can be eliminated, bearing friction resistance is reduced, and friction loss is reduced; and moreover, the bearing of the motor is made of a non-magnetic ceramic material, so that the rotor position is not deviated, the motor is more stable to operate, and the motor efficiency is improved.
The rotor comprises a rotor core 7 and rotor magnetic steel 8, the rotor core 7 is sleeved on the rotor shaft 4, and the rotor magnetic steel 8 is positioned at the outer side of the rotor core 7; the stator is positioned outside the rotor and is fixed with the motor shell 1; the stator includes a stator core 2 and stator windings 16, and the stator windings 16 are wound around the stator core 2. In the embodiment, the stator core 2, the stator winding 16 and the rotor core 7 are made of silicon steel sheet materials, so that the iron loss of the motor can be reduced; the rotor magnetic steel 8 is tile-shaped magnetic steel made of samarium praseodymium cobalt magnetic steel, so that the copper consumption of the motor can be reduced, and the energy-saving effect can be achieved. The rotor magnetic steel 8 can be pasted on the surface of the rotor iron core 7 by adopting an inner arc surface pasting type, and is magnetized in the radial direction. And, the stator winding 16 as the armature winding is in an octal nine-slot form (as shown in fig. 2), the pitch y=1, the winding coefficient is high, and the utilization ratio is high; the working mode is star-shaped three-phase six-state, namely, every two phases in the three-phase winding are conducted in turn, and the working mode has the advantages of high winding utilization rate, good motor force energy index, small moment fluctuation and the like; meanwhile, fewer power switch devices are used in the control and drive circuit, the circuit design is simple, and the working efficiency of circuit work is improved.
The part of the rear end of the rotor shaft 4 extending out of the bearing 5 is positioned in the rear end cover 10, and a tracking magnetic ring 14, namely a signal magnetic ring, is arranged at the part; a rotor position sensor is provided in the rear cover 10 corresponding to the position of the tracking magnet ring 14, and the rotor position sensor is used for reflecting the rotor position. The PI control algorithm drives corresponding power switching devices connected with the armature windings to feed the armature windings in sequence, so that a rotating magnetic field is generated on the stator, the permanent magnet rotor is driven to rotate, and along with the rotation of the rotor, the rotor position sensor continuously sends out signals to change the electrifying state of the armature windings, so that the current direction in a conductor under a certain magnetic pole is always unchanged. The rotor position sensor may be a hall position sensor assembly, for example, a PCB board including 5 lead wires (hall A, B, C, power supply +, -) and 3 hall elements soldered thereto, the PCB board being secured with 3 screws.
The middle part of the front end cover of the shell 1 is provided with a through hole, the front end of the rotor shaft 4 extends out of the shell 1, the inner diameter of the through hole is larger than the outer diameter of the corresponding rotor shaft, and a gap is formed between the through hole and the rotor shaft 4; the rotor shaft 4 is of a hollow structure, a cavity which is communicated in the front-back direction is formed in the rotor shaft 4, a gap is formed between the peripheral side of the rear end of the rotor shaft 4 and the rear end cover 10 (a certain gap is formed between the rear end of the rear end part of the rotor shaft 4 corresponding to the rear end cover 10 and between the peripheral side of the tracking magnetic ring 14 and the rear end cover 10), and the cavity in the rotor shaft 4 is communicated with the gap. The space of casing 1 front end housing department can be in casing 1 outside and unmanned aerial vehicle on the pump oil mouth of the fuel pump of intercommunication oil tank be connected, and the cavity in the rotor shaft 4 can be connected with the pumping port of the oil-well pump of the last intercommunication oil tank of unmanned aerial vehicle, for example, the pump oil mouth is through thick oil pipe and the clearance intercommunication that can cladding clearance, and the pumping port is through thin oil pipe and the cavity intercommunication of rotor shaft 4 front end, and thin oil pipe's connecting portion can stretch into in the thick oil pipe with the cavity intercommunication of rotor shaft 4 front end, make the seal in thick oil pipe and thin oil pipe junction can. As shown in the fuel flow direction shown in fig. 1, after aviation fuel is introduced into the motor from the gap between the front end cover of the housing 1 and the rotor shaft 4, the fuel flows through the bearing 5 at the front end of the rotor shaft 4, the gap between the stator and the rotor, the bearing 5 at the rear end of the rotor shaft 4, the gap between the tracking magnetic ring 14 and the rear end cover 10, flows into the gap between the rear end part of the rotor shaft 4 and the rear end cover 10, flows into the cavity in the rotor shaft 4 from the rear end of the rotor shaft 4, and flows out from the front end of the rotor shaft 4. Here, the fuel corresponds to the coolant. In the embodiment, aviation fuel is introduced into the motor to perform oil cooling and heat dissipation, so that the effects of lubrication and heat dissipation can be achieved, friction loss is reduced, efficiency is improved, energy is saved, and emission is reduced.
The front end cover of the shell 1 and the joint of the gap and the fuel pump are provided with a front sealing ring 3, and the sealing ring is used for sealing the joint of the front end cover of the motor and the pump body, so that fuel is ensured to enter the click interior from the gap, and fuel leakage is prevented; the joint of the rear end cover 10 and the shell 1 is provided with a rear sealing ring 11, so that the tightness is ensured.
The high-efficiency energy-saving brushless direct current motor for the long-endurance unmanned aerial vehicle adopts a square wave driving mode, is relatively simple to control, low in cost and easy to realize, and has a motor output of 15% higher than that of a sinusoidal wave driving mode under the condition of the same volume, so that the material utilization rate is high. The brushless direct current motor has the characteristics of high efficiency, energy saving, high rotating speed, long service life, small volume, light weight, stable rotating speed and the like, is suitable for the unmanned aerial vehicle, can improve the efficiency of the unmanned aerial vehicle, obviously improves the endurance of the unmanned aerial vehicle, and can effectively promote the popularization of the unmanned aerial vehicle under the background of rapid expansion of the unmanned aerial vehicle market. The electronic commutation circuit of the motor can adopt a three-phase bridge connection method, and the commutation system is in a three-phase six-state with two-phase conduction.
Taking a 60W brushless dc motor as an example according to an exemplary embodiment of the present utility model, the brushless dc motor is tested with reference to the parameters shown in the following table, and it is found that the efficiency of the brushless dc motor is 86.3% higher than the standard regulation by more than 10% (the energy efficiency standard of the 60W brushless dc motor is 75% as known from the national standard JB/T10690-2007). The high-efficiency energy-saving direct current brushless motor for the long-endurance unmanned aerial vehicle can bring higher energy efficiency and longer service life than the traditional motor, reduce noise and influence on environment, and further achieve the purposes of energy conservation and emission reduction.
| Parameter name | Parameter values |
| Number of poles | 8 |
| Number of grooves | 9 |
| Stator outer diameter (mm) | 26.3 |
| Stator inner diameter (mm) | 14.5 |
| Number of inclined grooves | 0.5 |
| Stator core length (mm) | 15 |
| Sheet material | WTG200 |
| Number of conductors per slot | 21 |
| Enamelled wire diameter (mm) | 0.4×18 |
| Groove filling rate | 75 |
| Length of air gap: (mm) | 1 |
| Polar arc coefficient | 0.8 |
| Magnetic steel thickness (mm) | 2 |
| Stator tooth magnetic density (T) | 1.66 |
| Stator yoke magnetic density (T) | 1.3 |
| Rotor yoke magnetic density (T) | 1.06 |
| Air gap flux density (T) | 0.68 |
| Rated voltage (V) | 28 |
| No-load rotating speed (r/min) | 22000 |
| Output power (W) | 60 |
| Rated current (A) | 2.5 |
| Rated rotation speed (r/min) | 15000 |
| Rated torque (N.m) | 0.5 |
| Efficiency (%) | 86.3 |
Table 1 table of related Performance parameters of brushless dc Motor
In an actual application scenario, each electrical component or electrical element in the high-efficiency energy-saving brushless direct current motor for the long-endurance unmanned aerial vehicle of the embodiment of the utility model can adopt equipment with corresponding functions in the prior art, for example, a rotor position sensor can adopt a Hall position sensor composed of a Hall element, a Hall switch circuit, a Hall linear circuit and the like. And other devices or components can be arranged in the brushless direct current motor, or the actual installation positions of the devices or components can be adjusted to realize the actual application or other functions of the brushless direct current motor. For example, front end ring 6 and rear end ring 15 are respectively arranged at two ends of the rotor core and rotor magnetic steel; for another example, a sheath 9 is further provided outside the rotor magnet steel 8 of the rotor.
It should be noted that each component described in the embodiments of the present utility model may be split into more components according to the implementation needs, and two or more components or parts of components may be combined into new components to achieve the objects of the embodiments of the present utility model.
The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (5)
1. The high-efficiency energy-saving brushless direct current motor for the long-endurance unmanned aerial vehicle comprises a shell, and a stator, a rotor shaft and a rotor position sensor which are arranged in the shell, and is characterized in that the stator comprises a stator core and a stator winding, the rotor comprises a rotor core and rotor magnetic steel, the stator core, the stator winding and the rotor core are made of silicon steel sheet materials, and the rotor magnetic steel is tile-shaped magnetic steel made of samarium praseodymium cobalt magnetic steel materials; the front end and the rear end of the rotor shaft are respectively supported with a bearing, and the bearings are made of ceramic materials; the rear end of the rotor shaft extends out of the bearing and is provided with a tracking magnetic ring, and the rotor position sensor is arranged in the rear end cover of the shell and corresponds to the position of the tracking magnetic ring;
The front end of the rotor shaft extends out of a through hole formed in the middle of a front end cover of the shell, and the inner diameter of the through hole is larger than the outer diameter of the corresponding rotor shaft, so that a gap is formed between the through hole and the rotor shaft; the rotor shaft is of a hollow structure, a gap is formed between the rear end of the rotor shaft and the rear end cover, and a cavity in the rotor shaft is communicated with the gap; the gap can be connected with a pump oil port of a fuel pump communicated with the oil tank on the unmanned aerial vehicle, and the cavity in the rotor shaft can be connected with an oil pumping port of an oil pump communicated with the oil tank on the unmanned aerial vehicle.
2. The efficient energy-saving brushless direct current motor for a long-endurance unmanned aerial vehicle according to claim 1, wherein a front sealing ring is arranged at the joint of the front end cover and the gap of the shell and the fuel pump, and a rear sealing ring is arranged at the joint of the rear end cover and the shell.
3. The efficient energy-saving brushless direct current motor for a long-endurance unmanned aerial vehicle according to claim 1, wherein front end rings and rear end rings are respectively arranged at two ends of the rotor core and the rotor magnetic steel.
4. The efficient energy-saving brushless direct current motor for a long-endurance unmanned aerial vehicle according to claim 1, wherein a rotor sheath is further arranged on the outer side of the rotor magnetic steel.
5. The efficient energy-saving brushless direct current motor for long-endurance unmanned aerial vehicle according to claim 1, wherein the stator winding is in an octal nine-slot form, and the working mode is a star-shaped three-phase six-state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323174282.0U CN221305717U (en) | 2023-11-24 | 2023-11-24 | High-efficiency energy-saving brushless direct current motor for long-endurance unmanned aerial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323174282.0U CN221305717U (en) | 2023-11-24 | 2023-11-24 | High-efficiency energy-saving brushless direct current motor for long-endurance unmanned aerial vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221305717U true CN221305717U (en) | 2024-07-09 |
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ID=91751216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323174282.0U Active CN221305717U (en) | 2023-11-24 | 2023-11-24 | High-efficiency energy-saving brushless direct current motor for long-endurance unmanned aerial vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221305717U (en) |
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2023
- 2023-11-24 CN CN202323174282.0U patent/CN221305717U/en active Active
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