Direct drive permanent magnet motor for integrated fan

Abstract

The present invention relates to the technical field of direct-drive permanent magnet motors, specifically to a direct-drive permanent magnet motor for an integrated fan, comprising: a motor housing, one end of which is fixedly provided with a rear cover, and the other end of which is fixedly provided with a front cover, and the middle part of which is rotatably provided with a rotating shaft; a rectifier assembly arranged inside the front cover, and the rectifier assembly is used to generate a neat flow field inside the motor housing to improve heat dissipation efficiency. When the conductive metal wire of the present invention moves in the magnetic field formed by two multi-stage magnetic rings, a reciprocating current is generated, and the piezoelectric fan is connected to the reciprocating current through a circuit board, so that the piezoelectric fan continuously vibrates to generate airflow and blows toward the stator and rotor position through the guidance of the air guide cover, wherein the air guide cover and the piezoelectric fan are in a rotating state, which makes the airflow generated by the piezoelectric fan spirally penetrate the stator and rotor, avoiding the occurrence of poor heat dissipation effect caused by turbulent airflow.

Description

Technical Field

[0001] The present invention relates to the technical field of direct-drive permanent magnet motors, and in particular to a direct-drive permanent magnet motor for an integrated fan. Background Art

[0002] Direct-drive permanent magnet motors have higher power-to-mass ratio, can achieve direct-drive control and have smaller size, so they will play a greater advantage during use. In addition, for the motor, its speed and braking performance are also very good. This usage characteristic is also one of the main reasons why direct-drive permanent magnet motors have attracted much attention in the market. However, the heat dissipation problem of direct-drive permanent magnet motors has always been a highly concerned issue in the industry. Because direct-drive permanent magnet motors generate high heat during operation, if the heat is not effectively dissipated, the permanent magnets are prone to demagnetization, which affects the life of the motor.

[0003] For example, an energy-saving permanent magnet motor provided by announcement number CN116613936A includes a motor body, a rotating shaft, and a permanent magnet rotor. A fan and a wind cover are arranged at the rear end of the motor body. The fan is coaxially arranged with the rotating shaft. A heat-conducting rod is coaxially connected to the rotating shaft. The heat-conducting rod extends into the interior of the rotating shaft. A sleeve is coaxially arranged at one end of the heat-conducting rod. The fan is sleeved on the heat-conducting rod. A connecting box is arranged on the side of the fan facing the sleeve. A first liquid storage cavity is provided inside the connecting box. The first liquid storage cavity is filled with a heat-conducting block. A certain amount of mercury is filled in the first liquid storage cavity formed between the heat-conducting block and the internal cavity of the connecting box. Mounting holes parallel to the axis of the heat-conducting rod are arranged on the heat-conducting block and the connecting box. A plug is slidably installed in the mounting hole. The technical solution uses mercury in the connecting box to achieve that when the plug is located in the mounting hole, the fan does not rotate with the heat-conducting rod. When the plug protrudes from the surface of the connecting box, the fan rotates with the heat-conducting rod, thereby reducing energy loss when the equipment is used.

[0004] However, when the above technology is actually used, the airflow is generated by the fan at the rear to dissipate the heat on the surface of the main body, and the heat dissipation efficiency is low. In addition, the air in the air gap between the stator and the rotor is stirred during the rotation of the rotor, making the flow field extremely turbulent, resulting in large flow resistance and wind friction loss, which seriously affects the heat dissipation of the motor. Summary of the invention

[0005] The purpose of the present invention is to provide a direct-drive permanent magnet motor for an integrated fan, so as to solve the problem that the flow field is extremely turbulent during the rotation of the rotor, resulting in large flow resistance and wind friction loss, which seriously affects the heat dissipation of the motor.

[0006] To achieve the above object, the present invention provides the following technical solution: an integrated direct-drive permanent magnet motor for a fan, comprising:

[0007] A motor housing, wherein a rear cover is fixedly disposed at one end of the motor housing, a front cover is fixedly disposed at the other end of the motor housing, and a rotating shaft is rotatably disposed at the middle portion of the motor housing;

[0008] A rectifier assembly is arranged inside the front cover, and the rectifier assembly is used to generate a neat flow field inside the motor housing, the rectifier assembly includes a deflector fixedly connected to the surface of the rotating shaft through a bracket, a circuit board is fixedly embedded in the middle of the deflector, a plurality of piezoelectric fans are fixedly arranged at one end of the circuit board corresponding to the position inside the deflector, and a plurality of conductive metal wires are fixedly connected to the surface of the circuit board, two multi-stage magnetic rings are fixedly connected to the inner wall of the front cover corresponding to the position of the conductive metal wires, and the magnetic poles of the two multi-stage magnetic rings at corresponding positions are opposite, so that the conductive metal wires pass through the magnetic induction lines between the two multi-stage magnetic rings when rotating;

[0009] A drive assembly is arranged at one end of the rear cover, and the drive assembly is used to generate airflow to dissipate heat inside and outside the motor housing;

[0010] An external heat dissipation component is arranged on the surface of the motor housing, and the external heat dissipation component outputs the heat inside the motor housing and the airflow generated by the driven component takes the heat away.

[0011] Preferably, the inner wall of the motor housing is fixedly connected with a stator, the surface of the rotating shaft corresponding to the position of the stator is fixedly connected with a rotor, the rotating shaft movably passes through both ends of the rear cover and the front cover through bearings, and a control box is fixedly installed at one end of the top of the motor housing.

[0012] Preferably, the end of the air guide cover corresponding to the position of the stator and the rotor is a flared structure, and the end of the air guide cover away from the position of the stator and the rotor is provided with a plurality of holes for air circulation.

[0013] Preferably, the circuit board is fixedly passed through and extends to the surface of the air duct cover, the conductive metal wire is a serpentine structure, the number of the piezoelectric fans and the conductive metal wires is the same, and a plurality of the piezoelectric fans are arranged in a ring shape on the inner wall of the air duct cover.

[0014] Preferably, the driving assembly includes a first fan fixedly connected to the surface of the rotating shaft, the first fan is located at one end of the rear cover away from the motor housing, the end of the rear cover corresponding to the position of the first fan is respectively fixedly connected with a partition tube and an air guide cover, an air inlet hole is opened in the middle of the inner wall of the rear cover corresponding to the partition tube, the partition tube is a tubular structure with openings at both ends, and the air guide cover is a tubular structure with openings at one end, the first fan is located inside the air guide cover, and the inner diameter of the air guide cover is larger than the diameter of the partition tube, so that when the first fan rotates, it drives the air inside the motor housing to pass through the air inlet hole and hit the air guide cover, and passes through the guide air of the air guide cover to the position between the air guide cover and the partition tube.

[0015] Preferably, the rotating shaft passes through the bearing and extends to the outside of the air guide cover, and one end of the rear cover corresponding to the rotating shaft position is fixedly connected to an air inlet cover, the air inlet cover is a hollow structure, and the second fan is located inside the air inlet cover, and the inner diameter of the air inlet cover is larger than the diameter of the rear cover, so that when the second fan rotates, the outside air is blown through the air inlet cover to the surface of the motor housing.

[0016] Preferably, the external heat dissipation component includes ventilation grooves respectively opened on the side walls of the rear cover and the front cover corresponding to the motor housing positions, and the ventilation grooves at the corresponding positions of the rear cover and the front cover are connected, the interior of the ventilation grooves on the side walls of the rear cover is connected to the position between the air guide cover and the partition pipe, and the interior of the ventilation grooves on the side walls of the front cover is connected to the interior of the front cover, so that when the rotor rotates, the air inside the motor housing circulates through the first fan in the partition pipe, the air guide cover, the ventilation grooves and the motor housing through the rectifier assembly and the drive assembly.

[0017] Preferably, connecting grooves are respectively provided at both ends of the motor casing corresponding to the ventilation grooves, and a heat conductive sheet is fixedly embedded in the top of the motor casing corresponding to the connecting grooves. The heat conductive sheet is a hollow structure in the middle, and the interior of the heat conductive sheet is connected to the interiors of the two connecting grooves at both ends of the corresponding positions. A heat dissipation fin is fixedly connected to the top of the heat conductive sheet, so that when the hot air in the motor casing passes through the ventilation grooves and the connecting grooves and penetrates the heat conductive sheet, the heat inside the motor casing is radiated and dissipated through the heat dissipation fins, and the heat dissipation fins are convectively dissipated through the airflow generated by the second fan.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention generates a reciprocating current when a conductive metal wire moves in a magnetic field formed by two multi-stage magnetic rings, and enables a piezoelectric fan to be connected to the reciprocating current through a circuit board, so that the piezoelectric fan continuously vibrates to generate airflow and blows it toward the stator and rotor through the guidance of the air guide cover, wherein the air guide cover and the piezoelectric fan are in a rotating state, so that the airflow generated by the piezoelectric fan is spirally penetrated through the stator and the rotor, thereby avoiding the occurrence of poor heat dissipation effect caused by airflow turbulence;

[0020] The present invention also drives the first fan to rotate when the shaft rotates, and causes the first fan to generate negative pressure on the inner wall of the partition tube, so that the spiral airflow generated at one end of the rectifier assembly will pass through the air inlet hole neatly and hit the inner wall of the air guide cover, thereby guiding the airflow flowing inside the motor casing, wherein the airflow hitting the inner wall of the air guide cover will enter the interior of the connecting groove of the side wall of the motor casing through the guidance of the ventilation groove of the side wall of the rear cover, and enter the interior of the heat conducting plate, and the heat dissipation fins fixed on the surface of the heat conducting plate radiate heat to the heat conducting plate and the motor casing, and then the airflow will return to the interior of the motor casing through the connecting groove at the other end of the motor casing and the ventilation groove of the side wall of the front cover. Since there is no outside air involved, the heat dissipation environment is relatively clean, and no outside dust will enter the interior of the motor casing, causing energy loss due to dust inside the motor casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the direct-drive permanent magnet motor for the integrated fan of the present invention;

[0022] Figure 2 The overall structure of the direct-drive permanent magnet motor for the integrated fan of the present invention is shown in cross-section. Figure 1 ;

[0023] Figure 3 The overall structure of the direct-drive permanent magnet motor for the integrated fan of the present invention is shown in cross-section. Figure 2 ;

[0024] Figure 4 The overall structure of the direct-drive permanent magnet motor for the integrated fan of the present invention is exploded Figure 1 ;

[0025] Figure 5 The overall structure of the direct-drive permanent magnet motor for the integrated fan of the present invention is exploded Figure 2 ;

[0026] Figure 6 This is an exploded view of the structure of the direct-drive permanent magnet motor spoiler assembly for the integrated fan of the present invention.

[0027] In the figure: 1. Motor housing; 2. Rear cover; 3. Front cover; 4. Stator; 5. Rotating shaft; 6. Air inlet cover;

[0028] 701, air deflector; 702, circuit board; 703, piezoelectric fan; 704, conductive metal wire; 705, multi-stage magnetic ring;

[0029] 801, first fan; 802, partition tube; 803, air inlet hole; 804, air guide cover; 805, second fan;

[0030] 901, ventilation slot; 902, connecting slot; 903, heat conducting sheet; 904, heat dissipation fin;

[0031] 10. Control box; 11. Rotor. DETAILED DESCRIPTION

[0032] 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.

[0033] See also Figure 1-Figure 6 As shown, the integrated direct-drive permanent magnet motor for a fan has the following multiple components, and each component of this case is described in detail below.

[0034] A motor housing 1 is provided with a rear cover 2 fixedly disposed at one end of the motor housing 1, and a front cover 3 fixedly disposed at the other end of the motor housing 1. A rotating shaft 5 is rotatably disposed in the middle of the motor housing 1. A stator 4 is fixedly mounted on the inner wall of the motor housing 1. A rotor 11 is fixedly mounted on the surface of the rotating shaft 5 corresponding to the position of the stator 4. The rotating shaft 5 movably passes through both ends of the rear cover 2 and the front cover 3 through bearings. A control box 10 is fixedly mounted on one end of the top of the motor housing 1.

[0035] A rectifier assembly is arranged inside the front cover 3, and the rectifier assembly is used to generate a neat flow field inside the motor housing 1 to improve the heat dissipation efficiency. The rectifier assembly includes a guide cover 701 fixedly installed on the surface of the rotating shaft 5 through a bracket, a circuit board 702 is fixedly embedded in the middle of the guide cover 701, and a plurality of piezoelectric fans 703 are fixedly arranged at one end of the circuit board 702 corresponding to the internal position of the guide cover 701, and a plurality of conductive metal wires 704 are fixedly installed on the surface of the circuit board 702, and two multi-stage magnetic rings 705 are fixedly installed on the inner wall of the front cover 3 corresponding to the position of the conductive metal wires 704, and the two multi-stage magnetic rings The magnetic poles at the corresponding positions of 705 are opposite, so that the conductive metal wire 704 can penetrate the magnetic induction lines between the two multi-stage magnetic rings 705 when rotating. The end of the air duct 701 corresponding to the position of the stator 4 and the rotor 11 is a flared structure, and the end of the air duct 701 away from the position of the stator 4 and the rotor 11 is provided with a plurality of holes for air circulation. The circuit board 702 is fixedly penetrated and extends to the surface of the air duct 701. The conductive metal wire 704 is a serpentine structure. The number of piezoelectric fans 703 and the conductive metal wire 704 is the same, and a plurality of piezoelectric fans 703 are arranged in a ring shape on the inner wall of the air duct 701.

[0036] When the above structure is in use, when the rotor 11 drives the rotating shaft 5 to rotate under the drive of the stator 4, the rotating shaft 5 will drive the air deflector 701 to rotate through the bracket, and when the air deflector 701 rotates, the air deflector 701 will drive the conductive metal wire 704 to rotate through the circuit board 702, and the conductive metal wire 704 will rotate between the two multi-stage magnetic rings 705. Since the magnetic poles of the corresponding positions of the two multi-stage magnetic rings 705 are opposite, there are multiple magnetic fields between the two multi-stage magnetic rings 705, and the directions of the two adjacent magnetic fields are opposite, so that when the conductive metal wire 704 rotates, it will pass through the magnetic induction line between the two multi-stage magnetic rings 705. The mathematical expression according to Faraday's law of electromagnetic induction is:

[0037] E = VBL

[0038] in:

[0039] Ε: is the induced electromotive force,

[0040] V: is the relative motion speed between the conductor and the magnetic field,

[0041] B: is the magnetic induction intensity of the magnetic field,

[0042] L: is the length of the conductor moving in the magnetic field;

[0043] It can be seen from the above formula that the longer the conductor length, the greater the electromotive force. Therefore, the conductive metal wire 704 is designed to be a serpentine structure to obtain a larger electromotive force. When the conductive metal wire 704 moves in the magnetic field formed by the two multi-stage magnetic rings 705, since the directions of the two adjacent magnetic fields are opposite, when the conductive metal wire 704 rotates, a reciprocating current will be generated therein, and the piezoelectric fan 703 is connected to the reciprocating current through the circuit board 702, so that the piezoelectric fan 703 continuously vibrates and generates airflow, so that the piezoelectric fan 703 continuously generates airflow and blows toward the stator 4 and the rotor 11 through the guidance of the air guide cover 701. Since the air guide cover 701, the circuit board 702 and the piezoelectric fan 703 are in a rotating state during operation, the airflow generated by the piezoelectric fan 703 will be spirally penetrate the stator 4 and the rotor 11 to avoid the occurrence of poor heat dissipation effect caused by airflow turbulence.

[0044] A driving assembly is arranged at one end of the rear cover 2, and the driving assembly is used to generate airflow to dissipate heat inside and outside the motor housing 1. The driving assembly includes a first fan 801 fixedly mounted on the surface of the rotating shaft 5. The first fan 801 is located at one end of the rear cover 2 away from the motor housing 1. A partition tube 802 and an air guide cover 804 are fixedly mounted on one end of the rear cover 2 corresponding to the position of the first fan 801. An air inlet hole 803 is opened in the middle of the inner wall of the rear cover 2 corresponding to the partition tube 802. The partition tube 802 is a tubular structure with openings at both ends, and the air guide cover 804 is a tubular structure with an opening at one end. The first fan 801 is located inside the air guide cover 804, and the air guide cover 80 4 has an inner diameter greater than the diameter of the partition tube 802, so that when the first fan 801 rotates, it drives the air inside the motor housing 1 to pass through the air inlet hole 803 and hit the air guide cover 804, and passes through the guide air of the air guide cover 804 to the position between the air guide cover 804 and the partition tube 802. The rotating shaft 5 passes through and extends to the outside of the air guide cover 804 through the bearing movement. An air inlet cover 6 is fixedly installed at one end of the rear cover 2 corresponding to the position of the rotating shaft 5. The air inlet cover 6 is a hollow structure, and the second fan 805 is located inside the air inlet cover 6. The inner diameter of the air inlet cover 6 is greater than the diameter of the rear cover 2, so that when the second fan 805 rotates, the outside air is blown to the surface of the motor housing 1 through the air inlet cover 6.

[0045] When the above structure is in use, when the rotating shaft 5 rotates, the rotating shaft 5 will drive the first fan 801 to rotate, and the first fan 801 will generate negative pressure on the inner wall of the partition tube 802, so that the spiral airflow generated at one end of the rectifier assembly will pass through the air inlet hole 803 neatly and hit the inner wall of the air guide cover 804, thereby guiding the airflow flowing inside the motor housing 1.

[0046] An external heat dissipation component is arranged on the surface of the motor housing 1, and the external heat dissipation component outputs the heat inside the motor housing 1 and the airflow generated by the driving component takes the heat away. The external heat dissipation component includes ventilation slots 901 respectively opened on the side walls of the rear cover 2 and the front cover 3 corresponding to the position of the motor housing 1, and the ventilation slots 901 at the corresponding positions of the rear cover 2 and the front cover 3 are connected, the interior of the ventilation slots 901 on the side wall of the rear cover 2 is connected to the position between the air guide cover 804 and the partition pipe 802, and the interior of the ventilation slots 901 on the side wall of the front cover 3 is connected to the interior of the front cover 3, so that when the rotor 11 rotates, the air inside the motor housing 1 is ventilated by the rectifier component in cooperation with the driving component through the first fan 801 in the partition pipe 802, the air guide cover 804, the ventilation slots 901 and the motor housing 1. The internal circulation of the casing 1 is achieved, and connecting grooves 902 are respectively provided at both ends of the motor casing 1 corresponding to the ventilation grooves 901. A heat conductive sheet 903 is fixedly embedded at the top of the motor casing 1 corresponding to the connecting grooves 902. The heat conductive sheet 903 is a hollow structure in the middle, and the interior of the heat conductive sheet 903 is connected to the interiors of the two connecting grooves 902 at both ends of the corresponding positions. A heat dissipation fin 904 is fixedly installed on the top of the heat conductive sheet 903, so that when the hot air in the motor casing 1 passes through the ventilation grooves 901 and the connecting grooves 902 and penetrates the heat conductive sheet 903, the heat inside the motor casing 1 is radiated and dissipated through the heat dissipation fins 904, and the heat dissipation fins 904 are convectively dissipated through the airflow generated by the second fan 805, thereby improving the heat dissipation effect of the motor casing 1.

[0047] When the above structure is in use, the airflow hitting the inner wall of the air guide cover 804 will enter the interior of the connecting groove 902 of the side wall of the motor casing 1 through the guidance of the ventilation groove 901 on the side wall of the rear cover 2, and enter the interior of the heat conducting plate 903, and then return to the interior of the motor casing 1 through the connecting groove 902 at the other end of the motor casing 1 and the ventilation groove 901 on the side wall of the front cover 3. When the rotating shaft 5 rotates, it will drive the second fan 805 to rotate, so that the second fan 805 draws the outside wind into the interior of the air inlet cover 6 through the air inlet cover 6, and blows it toward the surface of the motor casing 1, so that the airflow generated by the second fan 805 will perform convection cooling on the heat conducting plate 903 and the heat dissipating fins 904 on the surface of the motor casing 1, thereby effectively improving the heat dissipation effect of the motor casing 1.

[0048] The working principle corresponding to the above structure is: when in use, the invention drives the rotating shaft 5 to rotate through the rotor 11 driven by the stator 4, which will cause the rotating shaft 5 to drive the air deflector 701 to rotate through the bracket, and when the air deflector 701 rotates, the air deflector 701 will drive the conductive metal wire 704 to rotate through the circuit board 702, and cause the conductive metal wire 704 to rotate between the two multi-stage magnetic rings 705. Since the magnetic poles of the corresponding positions of the two multi-stage magnetic rings 705 are opposite, there are multiple magnetic fields between the two multi-stage magnetic rings 705, and the directions of the two adjacent magnetic fields are opposite, so that when the conductive metal wire 704 rotates, it will pass through the magnetic induction line between the two multi-stage magnetic rings 705. The directions of the two adjacent magnetic fields are opposite, so that when the conductive metal wire 704 rotates, a reciprocating current will be generated in the conductive metal wire 704, and the piezoelectric fan 703 will be connected to the reciprocating current through the circuit board 702, so that the piezoelectric fan 703 will continuously vibrate and generate airflow, so that the piezoelectric fan 703 will continuously generate airflow and blow it to the position of the stator 4 and the rotor 11 through the guidance of the air guide cover 701, wherein the air guide cover 701, the circuit board 702 and the piezoelectric fan 703 are in a rotating state during operation, so that the airflow generated by the piezoelectric fan 703 will be spirally penetrated through the stator 4 and the rotor 11, avoiding the occurrence of poor heat dissipation effect caused by airflow turbulence;

[0049] At the same time, when the rotating shaft 5 rotates, the rotating shaft 5 drives the first fan 801 to rotate, and the first fan 801 generates negative pressure on the inner wall of the partition tube 802, so that the spiral airflow generated at one end of the rectifying assembly will neatly pass through the air inlet hole 803 and hit the inner wall of the air guide cover 804, thereby guiding the airflow flowing inside the motor housing 1;

[0050] The airflow that hits the inner wall of the air guide cover 804 will enter the interior of the connecting groove 902 on the side wall of the motor housing 1 through the guidance of the ventilation groove 901 on the side wall of the rear cover 2, and enter the interior of the heat conductive sheet 903, and the heat conductive sheet 903 and the motor housing 1 will be radiated and cooled by the heat dissipation fins 904 fixed on the surface of the heat conductive sheet 903. After that, the airflow will return to the interior of the motor housing 1 through the connecting groove 902 at the other end of the motor housing 1 and the ventilation groove 901 on the side wall of the front cover 3. Since there is no external air involved, the heat dissipation environment is relatively clean, and no external dust will enter the interior of the motor housing 1, causing energy loss caused by dust inside the motor housing 1.

[0051] When the rotating shaft 5 drives the second fan 805 to rotate, the second fan 805 will suck the external wind into the interior of the air inlet cover 6 through the air inlet cover 6, and blow it toward the surface of the motor housing 1, so that the airflow generated by the second fan 805 will perform convection cooling on the heat conducting plate 903 and the heat dissipating fins 904 on the surface of the motor housing 1, thereby effectively improving the heat dissipation effect of the motor housing 1.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A direct-drive permanent magnet motor for an integrated fan, characterized in that: include: A motor housing (1), wherein a rear cover (2) is fixedly provided at one end of the motor housing (1), and a front cover (3) is fixedly provided at the other end of the motor housing (1), and a rotating shaft (5) is rotatably provided in the middle of the motor housing (1); A rectifier assembly is arranged inside the front cover (3), and the rectifier assembly is used to generate a neat flow field inside the motor housing (1), the rectifier assembly comprises a shroud (701) fixedly connected to the surface of the rotating shaft (5) through a bracket, a circuit board (702) is fixedly embedded in the middle of the shroud (701), a plurality of piezoelectric fans (703) are fixedly arranged at one end of the circuit board (702) corresponding to the position inside the shroud (701), and a plurality of conductive metal wires (704) are fixedly connected to the surface of the circuit board (702), and two multi-stage magnetic rings (705) are fixedly connected to the inner wall of the front cover (3) corresponding to the position of the conductive metal wires (704), and the magnetic poles of the two multi-stage magnetic rings (705) at the corresponding positions are opposite, so that the conductive metal wires (704) pass through the magnetic induction lines between the two multi-stage magnetic rings (705) when rotating; A drive assembly is arranged at one end of the rear cover (2), and the drive assembly is used to generate airflow to dissipate heat inside and outside the motor housing (1); The driving assembly comprises a first fan (801) fixedly connected to the surface of the rotating shaft (5); the first fan (801) is located at an end of the rear cover (2) away from the motor housing (1); an end of the rear cover (2) corresponding to the position of the first fan (801) is respectively fixedly connected to a partition tube (802) and an air guide cover (804); and an air inlet hole (803) is provided in the middle of the inner wall of the rear cover (2) corresponding to the partition tube (802); An external heat dissipation component is arranged on the surface of the motor housing (1), and the external heat dissipation component dissipates the heat inside the motor housing (1), and the airflow generated by the driven component takes the heat away.

2. The integrated direct-drive permanent magnet motor for a fan according to claim 1, characterized in that: The inner wall of the motor housing (1) is fixedly connected to a stator (4); the surface of the rotating shaft (5) corresponding to the position of the stator (4) is fixedly connected to a rotor (11); the rotating shaft (5) movably passes through both ends of the rear cover (2) and the front cover (3) via a bearing; and a control box (10) is fixedly mounted on one end of the top of the motor housing (1).

3. The integrated direct-drive permanent magnet motor for a fan according to claim 2, characterized in that: One end of the air guide cover (701) corresponding to the position of the stator (4) and the rotor (11) is a flared structure, and one end of the air guide cover (701) away from the position of the stator (4) and the rotor (11) is provided with a plurality of holes for air circulation.

4. The integrated direct-drive permanent magnet motor for a fan according to claim 3, characterized in that: The circuit board (702) is fixedly passed through and extends to the surface of the air guide cover (701); the conductive metal wire (704) is a serpentine structure; the number of the piezoelectric fans (703) and the number of the conductive metal wires (704) are the same; and a plurality of the piezoelectric fans (703) are arranged in a ring shape on the inner wall of the air guide cover (701).

5. The integrated direct-drive permanent magnet motor for a fan according to claim 4, characterized in that: The separation tube (802) is a tubular structure with openings at both ends, and the air guide cover (804) is a tubular structure with an opening at one end. The first fan (801) is located inside the air guide cover (804), and the inner diameter of the air guide cover (804) is larger than the diameter of the separation tube (802), so that when the first fan (801) rotates, it drives the air inside the motor housing (1) to pass through the air inlet hole (803) and hit the air guide cover (804), and then passes through the guide air of the air guide cover (804) to the position between the air guide cover (804) and the separation tube (802).

6. The integrated direct-drive permanent magnet motor for a fan according to claim 5, characterized in that: The rotating shaft (5) is movably penetrated by a bearing and extends to the outside of the air guide cover (804); an end of the rear cover (2) corresponding to the position of the rotating shaft (5) is fixedly connected to an air inlet cover (6); the air inlet cover (6) is a hollow structure, and the second fan (805) is located inside the air inlet cover (6); the inner diameter of the air inlet cover (6) is greater than the diameter of the rear cover (2), so that when the second fan (805) rotates, the outside air is blown toward the surface of the motor housing (1) through the air inlet cover (6).

7. The integrated direct-drive permanent magnet motor for a fan according to claim 6, characterized in that: The external heat dissipation component comprises ventilation slots (901) respectively provided on the side walls of the rear cover (2) and the front cover (3) at positions corresponding to the motor housing (1), and the ventilation slots (901) at corresponding positions of the rear cover (2) and the front cover (3) are connected to each other, the interior of the ventilation slots (901) on the side walls of the rear cover (2) is connected to the position between the air guide cover (804) and the partition pipe (802), and the interior of the ventilation slots (901) on the side walls of the front cover (3) is connected to the interior of the front cover (3), so that when the rotor (11) rotates, the air inside the motor housing (1) circulates through the first fan (801) in the partition pipe (802), the air guide cover (804), the ventilation slots (901) and the motor housing (1), through the rectifier component cooperating with the drive component.

8. The integrated direct-drive permanent magnet motor for a fan according to claim 7, characterized in that: The motor housing (1) is provided with connecting grooves (902) at both ends of the motor housing (1) at positions corresponding to the ventilation grooves (901), and a heat conducting sheet (903) is fixedly embedded at the top of the motor housing (1) at positions corresponding to the connecting grooves (902). The heat conducting sheet (903) is a hollow structure in the middle, and the interior of the heat conducting sheet (903) is connected to the interiors of the two connecting grooves (902) at both ends of the corresponding positions. The top of the heat conducting sheet (903) is fixedly connected with a heat dissipation fin (904), so that when hot air in the motor housing (1) passes through the ventilation grooves (901) and the connecting grooves (902) and penetrates the heat conducting sheet (903), the heat inside the motor housing (1) is radiated and dissipated through the heat dissipation fins (904), and the heat dissipation fins (904) are convectively dissipated through the airflow generated by the second fan (805).

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