High-magnetic-density outer rotor permanent magnet motor for unmanned aerial vehicle and method

Abstract

The invention discloses a high-magnetic-density outer rotor permanent magnet motor for an unmanned aerial vehicle and a method, and relates to the technical field of aircraft electromechanics, the high-magnetic-density outer rotor permanent magnet motor comprises an outer rotor, a plurality of permanent magnets are fixedly connected to the inner wall of the outer rotor, a supporting sleeve is arranged on the inner side of the outer rotor, an inner stator iron core is arranged on the inner side of the outer rotor, and the inner stator iron core sleeves the outer side of the supporting sleeve; the outer side of the inner stator core is fixedly connected with a stator winding, one side, far away from the outer rotor, of the inner stator core is provided with a rear end cover, one side of the rear end cover is fixedly connected with a storage frame and a conduction pipe, cooling liquid in the storage frame flows into the conduction pipe, the conduction pipe is in a vortex shape, and the conduction pipe is made of a metal material with good thermal conductivity. When the air blowing piece sucks in external air, the air passes through the conduction pipe so that the air can be further cooled, and when cooled cold air makes contact with the heat conduction piece, the cooling effect is improved.

Description

Technical Field

[0001] The present invention relates to the field of aircraft electromechanical technology, and in particular to a high magnetic density outer rotor permanent magnet motor and method for unmanned aerial vehicles. Background Art

[0002] Outer rotor motors have an outer rotor assembly, with multiple winding coils inside the stator assembly, which can rotate in a magnetic field. Outer rotor motors are commonly used in many different applications, including household appliances, industrial equipment, power tools, etc. They have advantages such as high efficiency, low noise and low vibration.

[0003] A permanent magnet outer rotor motor disclosed in the patent application with reference publication number CN114243981B includes a plastic-encapsulated rotor assembly, a plastic-encapsulated stator assembly and a plastic-encapsulated end cover, wherein the plastic-encapsulated rotor assembly has an installation cavity, the plastic-encapsulated stator assembly is arranged in the installation cavity, the plastic-encapsulated stator assembly includes a winding stator, a rotating shaft and a stator plastic seal, the winding stator has a mounting hole in the center, the rotating shaft is arranged in the mounting hole, and the diameter of the mounting hole is greater than the diameter of the rotating shaft. The plastic-encapsulated stator assembly is installed in the installation cavity between the plastic-encapsulated rotor assembly and the plastic-encapsulated end cover, the rotating shaft connects the plastic-encapsulated rotor assembly and the plastic-encapsulated end cover through a bearing, and the stator plastic seal fills the gap between the rotating shaft and the mounting hole and covers the end faces at both ends of the winding stator. Therefore, the rotating shaft, the winding stator and the bearing are separated by the stator plastic seal, so that the three are insulated from each other. The voltage of the permanent magnet outer rotor motor cannot break through the stator plastic seal, thereby avoiding the problem of bearing damage by electrical corrosion, and extending the reliability and service life of the permanent magnet outer rotor motor.

[0004] Due to the special structure of the external rotor motor (the rotor is located on the outside) and the stator is on the inside, the stator that generates a lot of heat is inside, which makes the internal temperature easy to rise, resulting in performance degradation or shortened life due to heat accumulation. The stator and the inside of the motor cannot be cooled efficiently. When the motor heats up abnormally, the existing air cooling and water cooling cannot cool it down quickly and directly, and it often takes a certain amount of time to cool it down by heat transfer.

[0005] Therefore, it is necessary to provide a high magnetic density outer rotor permanent magnet motor for UAV and a method to solve the above technical problems. Summary of the invention

[0006] The object of the present invention is to provide a high magnetic density outer rotor permanent magnet motor and method for unmanned aerial vehicles, so as to solve the problems of the defects of the prior art mentioned in the above background technology.

[0007] Based on the above ideas, the present invention provides the following technical solutions: a high magnetic density outer rotor permanent magnet motor for a drone, comprising an outer rotor, a plurality of permanent magnets are fixedly connected to the inner wall of the outer rotor, a support sleeve is arranged on the inner side of the outer rotor, an inner stator core is arranged on the inner side of the outer rotor, the inner stator core is sleeved on the outer side of the support sleeve, a stator winding is fixedly connected to the outer side of the inner stator core, a rear end cover is arranged on the side of the inner stator core away from the outer rotor, and further comprising: A support frame, which is arranged between the rear end cover and the inner stator core and is used to support and fix the inner stator core, and a heat conducting member is arranged on the outer side of the support frame; A rotating shaft, the rotating shaft passes through the outer rotor and is fixedly connected to the outer rotor, a blowing member is arranged on one side of the rear end cover, and a transmission member is arranged between the rotating shaft and the blowing member for driving the blowing member to rotate; A storage frame, the storage frame is fixedly connected to the side of the rear end cover away from the outer rotor, and the inner side of the storage frame is fixedly connected to a conduction pipe, and the storage frame and the conduction pipe store coolant inside; A plurality of heat dissipation mechanisms are arranged in a ring around the support frame, and the heat dissipation mechanism includes a trigger component and an atomization component. When the temperature rises, the trigger component triggers the atomization component to spray and cool the stator winding and the outer rotor.

[0008] As a further solution of the present invention: the support frame includes a second support ring, the second support ring is fixedly connected to the side of the rear end cover close to the inner stator core, and the side of the second support ring close to the inner stator core is fixedly connected to the first support ring.

[0009] As a further solution of the present invention: the blowing member comprises: A rotating sleeve, which is arranged on the side of the rear end cover close to the inner stator core, and the rotating sleeve is rotatably connected to the rear end cover, a first flow slot is arranged on the outer side of the rear end cover, and is communicated with the rotating sleeve, and a plurality of fans are fixedly connected to the outer side of the rotating sleeve; A fixed ring, which is arranged inside the rotating sleeve, and a plurality of blades are fixedly connected between the fixed ring and the rotating sleeve, and the blades are arranged obliquely; As a further solution of the present invention: the transmission member includes: A rotating disk, which is fixedly connected to one end of the rotating shaft close to the outer rotor and is arranged inside the supporting sleeve; A mounting cylinder, the mounting cylinder is fixedly connected to one side of the rotating disk, and a plurality of second flow slots are opened on the outer side of the mounting cylinder; The fixing tube is fixedly connected to one end of the installation tube away from the rotating disk, and the fixing tube is arranged to be hollow and communicated with the installation tube, and the fixing ring is fixedly connected to the outside of the fixing tube.

[0010] As a further solution of the present invention: an outer sleeve is sleeved on the outside of the fixed sleeve, the outer sleeve is rotatably connected to one side of the rotating sleeve, and the outer sleeve is communicated with the rotating sleeve; a rotating sleeve is sleeved on the outside of the installation sleeve, and the rotating sleeve is communicated through a second flow groove opened on the outside of the installation sleeve.

[0011] As a further solution of the present invention: a plurality of heat conducting plates are fixedly connected between the outer sleeve and the rotating sleeve, and the plurality of heat conducting plates are all arranged on the inner side of the supporting sleeve. A flow groove is opened inside the heat conducting plate, and a liquid outlet groove and a liquid inlet groove are respectively arranged at both ends of the flow groove, the liquid inlet groove is connected with the outer sleeve, and the liquid outlet groove is connected with the rotating sleeve, a connecting tube is fixedly connected with one side of the rear end cover, and the connecting tube is connected with the storage frame through the first conduit, a plurality of second conduits are arranged on the outside of the conduction tube, and one end of the plurality of second conduits is fixedly connected with a connecting tube, and the connecting tube is fixedly connected to the outside of the rear end cover and is connected with the rotating sleeve through the first flow groove.

[0012] As a further solution of the present invention: the atomization assembly comprises: The fixing frame is fixedly connected to one side of the rear end cover, and an extrusion plate is arranged inside the fixing frame. A sliding plate, the sliding plate is fixedly connected to the top of the extrusion plate, the sliding plate passes through the fixed frame and is slidably connected to the fixed frame, and a spring is sleeved on the outer side of the sliding plate, both ends of the spring are respectively fixedly connected to the extrusion plate and the fixed frame, and the end of the sliding plate away from the fixed frame is rotatably connected to a contact wheel; A liquid inlet pipe, one end of which is fixedly connected to the bottom of the fixed frame, and the other end of which is connected to the storage frame, and a one-way liquid inlet valve is arranged on the outside of the liquid inlet pipe; The liquid outlet pipe is fixedly connected to the bottom of the fixed frame, and the other end of the liquid outlet pipe is fixedly connected to an atomizing nozzle for atomization, and a one-way liquid outlet valve is arranged on the outside of the liquid outlet pipe.

[0013] As a further solution of the present invention: the triggering member includes: A fixed shaft, the fixed shaft is fixedly connected to the first supporting ring; A fuse, the fuse is fixedly connected to the outside of the fixed shaft, and one end of the fuse is fixedly connected to a fixing piece; A traction wire, which is fixedly connected to one end of the fixing member, passes through the bottom of the fixing frame and is fixedly connected to the extrusion plate, and is used to pull the extrusion plate downward; A plurality of contact blocks are fixedly connected to the inner side of the outer rotor. When the sliding plate rises and contacts with the contact blocks, the contact blocks press the sliding plate downward.

[0014] As a further solution of the present invention: the heat conducting member comprises: A plurality of heat-conducting support plates are arranged in a ring shape around the first support ring, and a heat-conducting ring is fixedly connected between the plurality of heat-conducting support plates, and heat is conducted through the heat-conducting ring and the heat-conducting support plates.

[0015] A method for using a high magnetic density outer rotor permanent magnet motor for a drone comprises the following steps: Step 1: Fix the rotating shaft to the input end of the external drone, and make the stator winding on the outside of the inner stator core rotate through the outer rotor with the permanent magnet, and the outer rotor drives the rotating shaft to rotate; Step 2: During operation, the blowing member is driven to rotate by the rotating shaft through the transmission member to take away the heat transferred by the heat-conducting member inside the outer rotor; Step 3: The temperature is monitored by a trigger on the outside of the outer rotor support frame. When the temperature rises to the set temperature, the trigger drives the atomization component to spray the coolant inside the storage frame to cool it down.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The blowing member is driven to rotate through the rotating shaft through the transmission member to take away the heat transferred by the heat-conducting member inside the outer rotor. When the blowing member rotates, a storage frame and a conduction pipe are fixedly connected to one side of the rear end cover. The coolant inside the storage frame flows into the conduction pipe. The conduction pipe is set to be vortex-shaped, and the conduction pipe is made of metal material with good thermal conductivity. When the blowing member sucks in the external wind, the wind is further cooled through the conduction pipe. When the cooled cold wind contacts the heat-conducting member, the cooling effect is improved.

[0017] 2. Push the coolant in the conduction tube and the storage frame to between the outer sleeve and the fixed sleeve, and flow into the flow groove through the liquid inlet groove. The coolant flows in the flow groove to take away the heat on the support sleeve, and enters the rotating sleeve through the liquid outlet groove. The coolant with heat enters the fixed sleeve through the second flow groove opened on the outside of the installation cylinder, and enters the storage frame through the connecting cylinder for circulation, thereby ensuring the cooling of the inner stator core, so that the coolant is circulated and cooled, ensuring that the equipment can be continuously cooled, and the inner stator core and stator winding can be efficiently cooled.

[0018] 3. When the temperature rises, the fixing part will be stretched and deformed, so that the spring will pull the extrusion plate up. The sliding plate can rise accordingly with the change of temperature. The coolant sprayed by the atomizing component will also increase with the increase of temperature. When the temperature drops, the fixing part will be reset, thereby reducing the amount of spraying of the atomizing component to avoid waste. It can be adaptively adjusted according to the temperature.

[0019] 4. When the temperature inside the equipment suddenly rises abnormally quickly, the fuse is made of fusible metal and the fuse will be disconnected, so that the atomizing component can spray the maximum amount quickly and protect the equipment from abnormal temperature rise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the storage frame structure of the present invention; Figure 3 This is a schematic diagram of the separation structure of the outer rotor and the rear end cover of the present invention; Figure 4 It is a schematic diagram of the rear end cover structure of the present invention; Figure 5 It is a schematic diagram of the support frame structure of the present invention; Figure 6 It is a schematic diagram of the outer sleeve structure of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the fixing tube of the present invention; Figure 8 The present invention Figure 6 A schematic diagram of the enlarged structure of part A; Fig. 9 is a schematic diagram of the cross-sectional structure of the heat conducting plate of the present invention; Fig.10 It is a schematic diagram of the structure of the inner stator core of the present invention; Fig.11 The present invention Fig.10 A schematic diagram of the enlarged structure of part B; Fig.12 It is a schematic diagram of the structure of the atomization assembly of the present invention; Fig.13 It is a schematic diagram of the cross-sectional structure of the fixing frame of the present invention.

[0022] In the figure: 1, outer rotor; 101, permanent magnet; 102, support sleeve; 104, contact block; 2, rear end cover; 3, inner stator core; 301, stator winding; 4, rotating shaft; 501, first support ring; 502, second support ring; 503, heat conduction ring; 504, heat conduction support plate; 6, rotating disk; 601, mounting cylinder; 602, fixing cylinder; 603, rotating sleeve; 604, fixing ring; 605, blade; 606, fan; 7, storage frame; 701, conduction tube; 702, fixed tube; 703, rotating sleeve; 604, fixed ring; 605, blade; 606, fan; 707, storage frame; 708, conduction tube; 709, 02, connecting tube; 703, first conduit; 704, second conduit; 8, outer sleeve; 801, rotating sleeve; 9, heat conduction plate; 901, flow groove; 902, liquid outlet groove; 903, liquid inlet groove; 10, fixed shaft; 1001, fuse; 1002, fixing part; 1003, traction wire; 11, fixed frame; 111, extrusion plate; 112, sliding plate; 113, contact wheel; 114, spring; 115, liquid outlet pipe; 116, liquid inlet pipe; 117, atomizing nozzle. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] like Figures 1 to 13 As shown, a high magnetic density outer rotor permanent magnet motor and method for a drone include the following embodiments: Embodiment 1: Figures 1 to 6 As shown, a high magnetic density outer rotor permanent magnet motor for a drone comprises an outer rotor 1, a plurality of permanent magnets 101 are fixedly connected to the inner wall of the outer rotor 1, a support sleeve 102 is arranged on the inner side of the outer rotor 1, an inner stator core 3 is arranged on the inner side of the outer rotor 1, the inner stator core 3 is sleeved on the outer side of the support sleeve 102, and a stator winding 301 is fixedly connected to the outer side of the inner stator core 3, and a rear end cover 2 is arranged on the side of the inner stator core 3 away from the outer rotor 1, and further comprises: A support frame, which is arranged between the rear end cover 2 and the inner stator core 3, and is used to support and fix the inner stator core 3. A heat conducting member is arranged on the outer side of the support frame; A rotating shaft 4 passes through the outer rotor 1 and is fixedly connected to the outer rotor 1. A blowing member is provided on one side of the rear end cover 2. A transmission member is provided between the rotating shaft 4 and the blowing member for driving the blowing member to rotate; A storage frame 7, the storage frame 7 is fixedly connected to the side of the rear end cover 2 away from the outer rotor 1, and the inner side of the storage frame 7 is fixedly connected to a conduction pipe 701, and the storage frame 7 and the conduction pipe 701 store coolant inside; A plurality of heat dissipation mechanisms are arranged in a ring around the support frame, and the heat dissipation mechanism includes a trigger component and an atomization component. When the temperature rises, the trigger component triggers the atomization component to spray and cool the stator winding 301 and the outer rotor 1.

[0026] In specific implementation, the rotating shaft 4 is fixed to the input end of the external drone, and the stator winding 301 on the outside of the inner stator core 3 is used to make the outer rotor 1 driven by the permanent magnet 101 rotate, and the outer rotor 1 drives the rotating shaft 4 to rotate. During the working process, the rotating shaft 4 drives the blowing member to rotate through the transmission member, so as to take away the heat transferred by the internal heat-conducting member of the outer rotor 1, and when the blowing member rotates, a storage frame 7 and a conduction pipe 701 are fixedly connected to one side of the rear end cover 2, and the coolant inside the storage frame 7 flows into the conduction pipe 701. The conduction pipe 701 is set to a vortex shape, and the conduction pipe 701 is made of a metal material with good thermal conductivity. When the blowing member sucks in the external wind, it passes through the conduction pipe 701 to further cool the wind. When the cooled cold wind contacts the heat-conducting member, the cooling effect is improved. The temperature is monitored by the trigger on the outside of the outer rotor 1 support frame. When the temperature rises to the set temperature, the trigger drives the atomization component to spray the coolant inside the storage frame 7 to cool down, which can quickly and directly cool down the outer rotor 1 and the inner stator core 3. The coolant can be fluorinated liquid. Due to its high thermal conductivity, the thermal conductivity of fluorinated liquid is significantly higher than that of traditional cooling media. It can directly contact heat sources such as chips and electronic components, quickly absorb and transfer heat to the cooling system, quickly and directly cool down the internal contact, and ensure the temperature inside the outer rotor 1 and the inner stator core 3. In this embodiment, Figures 4 to 8 As shown, the support frame includes a second support ring 502 , which is fixedly connected to a side of the rear end cover 2 close to the inner stator core 3 , and a first support ring 501 is fixedly connected to a side of the second support ring 502 close to the inner stator core 3 .

[0027] Blowing parts include: The rotating sleeve 603 is arranged on the side of the rear end cover 2 close to the inner stator core 3, and the rotating sleeve 603 is rotatably connected to the rear end cover 2. The outer side of the rear end cover 2 is provided with a first flow slot, which is connected to the rotating sleeve 603. The outer side of the rotating sleeve 603 is fixedly connected to a plurality of fans 606; A fixed ring 604, which is disposed inside the rotating sleeve 603, and a plurality of blades 605 are fixedly connected between the fixed ring 604 and the rotating sleeve 603, and the blades 605 are disposed obliquely; Transmission parts include: A rotating disk 6, the rotating disk 6 is fixedly connected to one end of the rotating shaft 4 close to the outer rotor 1, and the rotating disk 6 is arranged inside the supporting sleeve 102; The mounting tube 601 is fixedly connected to one side of the rotating disk 6, and a plurality of second flow slots are provided on the outer side of the mounting tube 601; The fixing tube 602 is fixedly connected to one end of the installation tube 601 away from the rotating disk 6 , and the fixing tube 602 is set to be hollow and communicated with the installation tube 601 , and the fixing ring 604 is fixedly connected to the outside of the fixing tube 602 .

[0028] Thermal conductors include: A plurality of heat-conducting support plates 504 are arranged in a ring shape around the first support ring 501 , and a heat-conducting ring 503 is fixedly connected between the plurality of heat-conducting support plates 504 , and heat is conducted through the heat-conducting ring 503 and the heat-conducting support plates 504 .

[0029] In a specific implementation, when the rotating shaft 4 is driven to rotate by the outer rotor 1, the rotating shaft 4 drives the fixedly connected rotating disk 6 to rotate, and the rotating disk 6 drives the fixed cylinder 602 to rotate through the mounting cylinder 601, and the outer side of the fixed cylinder 602 rotates through the fixedly connected fixed ring 604 and the blades 605 on the outer side of the fixed ring 604, and the blades 605 drive the rotating sleeve 603 to rotate, thereby rotating the fan 606 on the outer side of the rotating sleeve 603, and the fan 606 rotates to dissipate heat and blow air to the interior of the whole, without the need for additional electrical equipment for heat dissipation drive.

[0030] Embodiment 2: Figures 6 to 9 As shown, an outer sleeve 8 is sleeved on the outside of the fixed sleeve 602, and the outer sleeve 8 is rotatably connected to one side of the rotating sleeve 603, and the outer sleeve 8 is communicated with the rotating sleeve 603. A rotating sleeve 801 is sleeved on the outside of the installation sleeve 601, and the rotating sleeve 801 is communicated through a second flow groove opened on the outside of the installation sleeve 601.

[0031] A plurality of heat conducting plates 9 are fixedly connected between the outer sleeve 8 and the rotating sleeve 801, and the plurality of heat conducting plates 9 are all arranged on the inner side of the support sleeve 102. A flow groove 901 is opened inside the heat conducting plate 9, and a liquid outlet groove 902 and a liquid inlet groove 903 are respectively arranged at both ends of the flow groove 901. The liquid inlet groove 903 is connected with the outer sleeve 8, and the liquid outlet groove 902 is connected with the rotating sleeve 801. A connecting tube 702 is fixedly connected to one side of the rear end cover 2, and the connecting tube 702 is connected with the storage frame 7 through the first conduit 703. A plurality of second conduits 704 are arranged on the outer side of the conduction tube 701, and one end of the plurality of second conduits 704 is fixedly connected with a connecting tube, which is fixedly connected to the outer side of the rear end cover 2 and is connected with the rotating sleeve 603 through the first flow groove.

[0032] During specific implementation, the temperature of the stator winding 301 and the inner stator core 3 inside the device is often prone to rise due to poor heat dissipation effect. Therefore, in this solution, multiple heat-conducting plates 9 are arranged inside the support sleeve 102, and the support sleeve 102 is made of heat-conducting metal material, which can quickly transmit the heat of the inner stator core 3. When the heat of the inner stator core 3 is transferred to the inner side of the support sleeve 102, the rotating shaft 4 drives the fixed ring 604 to rotate through the installation cylinder 601 and the fixed cylinder 602 in the transmission member, and the fixed ring 604 drives the outer blades 605 to rotate. The blades 605 are arranged at an angle, similar to a spiral impeller, and a circulation channel is formed through the outer sleeve 8, the rotating sleeve 603, the first circulation groove and the conduction tube 701. When the fixed ring 604 rotates, the coolant inside the conductive tube 701 and the storage frame 7 is pushed to between the outer sleeve 8 and the fixed cylinder 602, and flows into the flow groove 901 through the liquid inlet groove 903. The coolant flows in the flow groove 901, takes away the heat on the support sleeve 102, and enters the rotating sleeve 801 through the liquid outlet groove 902. The coolant with heat enters the fixed cylinder 602 through the second flow groove opened on the outside of the installation cylinder 601, and enters the storage frame 7 through the connecting cylinder 702 for circulation, thereby ensuring the cooling of the inner stator core 3, and the coolant is circulated for cooling, ensuring that the equipment can be continuously cooled, and the inner stator core 3 and the stator winding 301 can be efficiently cooled.

[0033] Embodiment 3: Figures 10 to 13 As shown, the atomization assembly includes: The fixing frame 11 is fixedly connected to one side of the rear end cover 2, and an extrusion plate 111 is arranged inside the fixing frame 11. A sliding plate 112, the sliding plate 112 is fixedly connected to the top of the extrusion plate 111, the sliding plate 112 passes through the fixed frame 11 and is slidably connected to the fixed frame 11, and a spring 114 is sleeved on the outer side of the sliding plate 112, and both ends of the spring 114 are respectively fixedly connected to the extrusion plate 111 and the fixed frame 11, and the end of the sliding plate 112 away from the fixed frame 11 is rotatably connected to a contact wheel 113; A liquid inlet pipe 116, one end of which is fixedly connected to the bottom of the fixed frame 11, and the other end of which is connected to the storage frame 7. A one-way liquid inlet valve is provided on the outside of the liquid inlet pipe 116; The liquid outlet pipe 115 is fixedly connected to the bottom of the fixed frame 11 , and the other end of the liquid outlet pipe 115 is fixedly connected to an atomizing nozzle 117 for atomization, and a one-way liquid outlet valve is arranged outside the liquid outlet pipe 115 .

[0034] Triggers include: A fixed shaft 10, the fixed shaft 10 is fixedly connected to the first support ring 501; Fuse 1001, the fuse 1001 is fixedly connected to the outside of the fixed shaft 10, and one end of the fuse 1001 is fixedly connected to a fixing member 1002; A traction wire 1003, which is fixedly connected to one end of the fixing member 1002, passes through the bottom of the fixing frame 11 and is fixedly connected to the extrusion plate 111, and is used to pull the extrusion plate 111 downward; A plurality of contact blocks 104 are fixedly connected to the inner side of the outer rotor 1 . When the sliding plate 112 rises and contacts with the contact blocks 104 , the contact blocks 104 press the sliding plate 112 downward.

[0035] In specific implementation, when the gap between the stator winding 301 and the permanent magnet 101 is in a rotating state, there is a large amount of heat in the gap between the two. When the temperature rises, the trigger starts the atomization component to spray the coolant. The coolant absorbs heat and evaporates through the contact between the coolant and the outside of the device, thereby reducing the temperature of the device. The extrusion plate 111 inside the fixed frame 11 is pulled up by the spring 114, and the extrusion plate 111 drives the sliding plate 112 to rise. The contact wheel 113 on the top of the sliding plate 112 contacts the contact block 104 on the outside of the outer rotor 1. The contact block 104 continuously contacts and pushes the contact wheel 113 down. When the contact wheel 113 rises, the coolant inside the storage frame 7 is sucked in through the liquid inlet pipe 116. When the contact wheel 113 descends, the sliding plate 112 pushes the coolant inside the fixed frame 11 to be discharged through the liquid outlet pipe 115, and is discharged through the atomization nozzle 117, and sprayed to the outside of the device for cooling treatment; As for the start-up timing of the atomizing component, in this solution, the extrusion plate 111 is pulled downward by the fuse 1001 and the fixing part 1002 through the traction wire 1003. When the temperature rises, the fixing part 1002 is made of memory metal material. The memory metal is a special metal material that can restore its original macroscopic shape in another temperature range after plastic deformation in a certain temperature range. When the temperature rises, the fixing part 1002 will be elongated, so that the spring 114 pulls the extrusion plate 111 up, and the sliding plate 112 can rise accordingly with the change of temperature. The coolant sprayed by the atomizing component will also increase with the increase of temperature. After the temperature drops, the fixing part 1002 is reset, thereby reducing the spraying amount of the atomizing component to avoid waste, and can be adaptively adjusted according to the temperature. When the temperature inside the device suddenly rises abnormally quickly, fuse 1001 is made of fusible metal and a metal material that can melt at a specified temperature is selected. No specific instructions are given here. It is rotated according to actual needs, and fuse 1001 will be disconnected, so that the atomizing component can spray the maximum amount quickly and protect the device from abnormal heating.

[0036] A method for using a high magnetic density outer rotor permanent magnet motor for a drone is also provided, comprising the following steps: Step 1: Fix the rotating shaft 4 to the input end of the external drone, and make the stator winding 301 rotate through the outer rotor 1 driven by the permanent magnet 101 through the stator winding 301 outside the inner stator core 3, so that the outer rotor 1 drives the rotating shaft 4 to rotate; Step 2: During operation, the rotating shaft 4 drives the blowing member to rotate through the transmission member to take away the heat transferred by the internal heat-conducting member of the outer rotor 1; Step three: The temperature is monitored by a triggering member on the outside of the outer rotor 1 support frame. When the temperature rises to a set temperature, the triggering member drives the atomizing assembly to spray the coolant inside the storage frame 7 to cool it down.

[0037] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high magnetic density outer rotor permanent magnet motor for an unmanned aerial vehicle, comprising an outer rotor (1), a plurality of permanent magnets (101), a support sleeve (102), an inner stator core (3) and a stator winding (301), wherein a rear end cover (2) is provided on one side of the inner stator core (3), and the motor is characterized in that: Also includes: A support frame, the support frame is arranged between the rear end cover (2) and the inner stator core (3), and is used to support and fix the inner stator core (3), and a heat conducting member is arranged on the outer side of the support frame; a rotating shaft (4), the rotating shaft (4) passing through the outer rotor (1) and being fixedly connected to the outer rotor (1); a blowing member is provided on one side of the rear end cover (2); a transmission member is provided between the rotating shaft (4) and the blowing member for driving the blowing member to rotate; A storage frame (7), the storage frame (7) being fixedly connected to a side of the rear end cover (2) away from the outer rotor (1), and the inner side of the storage frame (7) being fixedly connected to a conduction pipe (701), wherein coolant is stored inside the storage frame (7) and the conduction pipe (701); A plurality of heat dissipation mechanisms are arranged in an annular manner around the support frame, the heat dissipation mechanisms comprising a trigger component and an atomization component, and when the temperature rises, the trigger component triggers the atomization component to spray and cool the stator winding (301) and the outer rotor (1); The transmission member comprises: a rotating disk (6), the rotating disk (6) being fixedly connected to one end of the rotating shaft (4) close to the outer rotor (1), the rotating disk (6) being arranged on the inner side of the support sleeve (102); a mounting tube (601), the mounting tube (601) being fixedly connected to one side of the rotating disk (6), and a plurality of second flow grooves being provided on the outer side of the mounting tube (601); and a fixed tube (602), the fixed tube (602) being fixedly connected to one end of the mounting tube (601) away from the rotating disk (6), the fixed tube (602) being arranged to be hollow and in communication with the mounting tube (601), and a fixed ring (604) being fixedly connected to the outer side of the fixed tube (602).

2. The high magnetic density outer rotor permanent magnet motor for unmanned aerial vehicles according to claim 1, characterized in that: The support frame comprises a second support ring (502), the second support ring (502) being fixedly connected to a side of the rear end cover (2) close to the inner stator core (3), and the first support ring (501) being fixedly connected to a side of the second support ring (502) close to the inner stator core (3).

3. The high magnetic density outer rotor permanent magnet motor for unmanned aerial vehicles according to claim 1, characterized in that: The blowing member comprises: A rotating sleeve (603), the rotating sleeve (603) being arranged on a side of the rear end cover (2) close to the inner stator core (3), and the rotating sleeve (603) being rotatably connected to the rear end cover (2), a first flow slot being arranged on the outer side of the rear end cover (2) and being in communication with the rotating sleeve (603), and a plurality of fans (606) being fixedly connected to the outer side of the rotating sleeve (603); A fixed ring (604) is arranged inside the rotating sleeve (603), and a plurality of blades (605) are fixedly connected between the fixed ring (604) and the rotating sleeve (603), and the blades (605) are arranged in an inclined manner.

4. The high magnetic density outer rotor permanent magnet motor for unmanned aerial vehicles according to claim 1, characterized in that: An outer sleeve (8) is sleeved on the outside of the fixed sleeve (602), the outer sleeve (8) is rotatably connected to one side of the rotating sleeve (603), and the outer sleeve (8) is communicated with the rotating sleeve (603). A rotating sleeve (801) is sleeved on the outside of the installation sleeve (601), and the rotating sleeve (801) is communicated with the second flow groove provided on the outside of the installation sleeve (601).

5. The high magnetic density outer rotor permanent magnet motor for unmanned aerial vehicles according to claim 4, characterized in that: A plurality of heat conducting plates (9) are fixedly connected between the outer sleeve (8) and the rotating sleeve (801), and the plurality of heat conducting plates (9) are all arranged on the inner side of the support sleeve (102). A flow groove (901) is provided inside the heat conducting plate (9), and a liquid outlet groove (902) and a liquid inlet groove (903) are respectively arranged at two ends of the flow groove (901), the liquid inlet groove (903) is communicated with the outer sleeve (8), and the liquid outlet groove (902) is communicated with the rotating sleeve (801). A connecting tube (702) is fixedly connected to one side of the rear end cover (2), and the connecting tube (702) is communicated with the storage frame (7) through a first conduit (703). A plurality of second conduits (704) are arranged on the outer side of the conducting tube (701), and one end of the plurality of second conduits (704) is fixedly connected to a connecting tube, which is fixedly connected to the outer side of the rear end cover (2) and is communicated with the rotating sleeve (603) through the first flow groove.

6. The high magnetic density outer rotor permanent magnet motor for unmanned aerial vehicles according to claim 2, characterized in that: The atomizing assembly comprises: A fixed frame (11), the fixed frame (11) being fixedly connected to one side of the rear end cover (2), and an extrusion plate (111) being arranged inside the fixed frame (11); A sliding plate (112), the sliding plate (112) being fixedly connected to the top of the extrusion plate (111), the sliding plate (112) passing through the fixed frame (11) and being slidably connected to the fixed frame (11), and a spring (114) being sleeved on the outer side of the sliding plate (112), two ends of the spring (114) being respectively fixedly connected to the extrusion plate (111) and the fixed frame (11), and one end of the sliding plate (112) away from the fixed frame (11) being rotatably connected to a contact wheel (113); a liquid inlet pipe (116), one end of the liquid inlet pipe (116) being fixedly connected to the bottom of the fixed frame (11), and the other end of the liquid inlet pipe (116) being connected to the storage frame (7), and a one-way liquid inlet valve being arranged on the outside of the liquid inlet pipe (116); A liquid outlet pipe (115) is fixedly connected to the bottom of the fixed frame (11), and the other end of the liquid outlet pipe (115) is fixedly connected to an atomizing nozzle (117) for atomization, and a one-way liquid outlet valve is arranged on the outside of the liquid outlet pipe (115).

7. The high magnetic density outer rotor permanent magnet motor for unmanned aerial vehicles according to claim 6, characterized in that: The triggering member comprises: A fixed shaft (10), the fixed shaft (10) being fixedly connected to the first support ring (501); A fuse (1001), the fuse (1001) is fixedly connected to the outside of the fixed shaft (10), and one end of the fuse (1001) is fixedly connected to a fixing member (1002); A traction wire (1003), the traction wire (1003) is fixedly connected to one end of the fixing member (1002), the traction wire (1003) passes through the bottom of the fixing frame (11) and is fixedly connected to the extrusion plate (111), and is used to pull the extrusion plate (111) downward; A plurality of contact blocks (104) are fixedly connected to the inner side of the outer rotor (1); when the sliding plate (112) rises and contacts the contact blocks (104), the contact blocks (104) press the sliding plate (112) downward.

8. The high magnetic density outer rotor permanent magnet motor for unmanned aerial vehicles according to claim 2, characterized in that: The heat conducting member comprises: A plurality of heat-conducting support plates (504) are provided in a ring shape around the first support ring (501), and a heat-conducting ring (503) is fixedly connected between the plurality of heat-conducting support plates (504), and heat conduction is performed through the heat-conducting ring (503) and the heat-conducting support plates (504).

9. A method for using a high magnetic density outer rotor permanent magnet motor for an unmanned aerial vehicle, characterized in that: The following steps are involved: Step 1: Fix the rotating shaft (4) to the input end of the external drone, and make the stator winding (301) rotate through the outer rotor (1) driven by the permanent magnet (101) through the stator winding (301) outside the inner stator core (3), so that the outer rotor (1) drives the rotating shaft (4) to rotate; Step 2: During operation, the rotating shaft (4) drives the blowing member to rotate via the transmission member, thereby taking away the heat transferred by the internal heat-conducting member of the outer rotor (1); Step three: The temperature is monitored by a triggering member on the outside of the outer rotor (1) support frame. When the temperature rises to a set temperature, the triggering member drives the atomizing component to spray the coolant inside the storage frame (7) to cool it down.

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