A planar centrifugal fan using a PCB printed circuit stator coil

Abstract

The utility model relates to a kind of plane centrifugal fan using PCB printed circuit stator coil, including wind wheel and support, wind wheel is installed on the central rotating shaft of support, and stator assembly is installed on the upper end surface of support, and the lower end surface of wind wheel is installed with rotor assembly, and rotor assembly and stator assembly are axially opposite distribution;Stator assembly includes PCB board and coil, and coil is arranged through copper foil line on PCB board and is distributed along the circumference of PCB board, and rotor assembly includes several permanent magnets, and permanent magnet is distributed along the circumference of the lower end surface of wind wheel, when coil is energized, axial magnetic field is generated and drives wind wheel with permanent magnet to rotate;The utility model can realize the high-precision, ultra-thin, batch production of motor stator coil, and improve the overall performance and production efficiency of motor.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal fan technology, and in particular relates to a planar centrifugal fan using a PCB printed circuit stator coil. Background Technology

[0002] As modern electronic devices continue to evolve towards thinner, lighter, and smaller designs, traditional motors, due to their complex structure and substantial thickness, struggle to meet the stringent space requirements of these devices. The stator coils of traditional motors are typically manufactured using a winding method, which is complex, inefficient, and consumes a large amount of space, making it difficult to achieve ultra-thin motor designs.

[0003] In addition, stator coils made by traditional winding methods are not precisely arranged, resulting in uneven magnetic field distribution. This can easily cause vibration and noise during motor operation, affecting equipment performance and user experience.

[0004] Therefore, there is an urgent need for a motor stator structure that is simpler, thinner, more efficient in manufacturing, and has better performance, in order to meet the high-performance requirements of modern electronic equipment for motors. Summary of the Invention

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a planar centrifugal fan with PCB printed circuit stator coils to solve the problems of complex process, large thickness, low efficiency and high noise of traditional motor stator coils, realize high precision, ultra-thin and mass production of motor stator coils, and improve the overall performance and production efficiency of motors.

[0006] The purpose of this utility model is achieved through the following technical solution: This planar centrifugal fan using a PCB printed circuit stator coil includes a fan wheel and a support. The fan wheel is mounted on the central rotating shaft of the support. A stator assembly is mounted on the upper surface of the support, and a rotor assembly is mounted on the lower surface of the fan wheel. The rotor assembly and the stator assembly are axially opposite to each other. The stator assembly includes a PCB board and a coil. The coil is arranged through copper foil lines on the PCB board and distributed circumferentially along the PCB board. The rotor assembly includes several permanent magnets distributed circumferentially along the lower surface of the fan wheel. When the coil is energized, it generates an axial magnetic field and drives the fan wheel with the permanent magnets to rotate.

[0007] The beneficial effects of this utility model are as follows: Compared with the prior art, the stator coil is made using PCB printed circuit technology, which significantly reduces the coil thickness and the overall thickness of the motor, meeting the space requirements of ultra-thin devices; the optimized coil layout and magnetic field distribution reduce vibration and noise during motor operation, improving the user experience; the compact structure makes it easy to integrate into various thin and light devices, and has good versatility and scalability; it enables high-precision, ultra-thin, and mass production of motor stator coils, improving the overall performance and production efficiency of the motor.

[0008] Preferably, the PCB board has multiple layers stacked sequentially, and each coil is arranged in an aligned manner; it has the advantages of high coil layout accuracy, uniform magnetic field distribution, and effective reduction of vibration and noise during motor operation.

[0009] Preferably, the copper foil circuit of the coil is rectangular, and the copper foil circuits of the rectangular frame are successively reduced inward and distributed at equal intervals to form the coil; this makes the shape of the coil basically consistent with the shape of the permanent magnet in the stator assembly, resulting in better interaction force of the axial magnetic field and more stable operation of the wind turbine.

[0010] Preferably, the PCB board is ring-shaped and fixed at the center of the upper surface of the bracket, and its outer diameter is equal to the outer diameter of the bottom surface of the wind turbine; not only is the structure more compact, but the interaction force of the axial magnetic field is also better, and the wind turbine operation is more stable.

[0011] Preferably, a plurality of embedding slots are provided on the lower end surface of the wind turbine, the embedding slots are distributed along the circumference of the wind turbine, and the permanent magnet is embedded in the embedding slots and protrudes from the embedding slots; by embedding and fixing the permanent magnet, the structure of the rotor assembly in the height direction of the wind turbine is more compact, thereby greatly reducing the overall thickness of the wind turbine.

[0012] Preferably, the axial clearance between the rotor assembly and the stator assembly is [value missing]; such a clearance height ensures a balance between magnetic field strength and driving efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the planar centrifugal fan structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the wind turbine structure of this utility model.

[0015] Figure 3 yes Figure 1 A magnified structural diagram at point A.

[0016] The labels in the attached diagram are as follows: 1. Wind turbine; 2. Support frame; 3. Stator assembly; 4. Rotor assembly; 11. Embedded slot; 31. PCB board; 32. Coil; 33. Copper foil circuit; 41. Permanent magnet. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings: as shown in the drawings Figures 1 to 3 As shown, this utility model includes a fan wheel 1 and a support 2. The fan wheel 1 is mounted on the central shaft of the support 2. A stator assembly 3 is mounted on the upper surface of the support 2, and a rotor assembly 4 is mounted on the lower surface of the fan wheel 1. The rotor assembly 4 and the stator assembly 3 are axially opposite to each other. The stator assembly 3 includes a PCB board 31 and coils 32. The coils 32 are arranged through copper foil lines 33 on the PCB board 31 and distributed circumferentially along the PCB board 31. The rotor assembly 4 includes several permanent magnets 41, which are distributed circumferentially along the lower surface of the fan wheel 1. When the coils 32 are energized, an axial magnetic field is generated, driving the fan wheel 1 with the permanent magnets 41 to rotate. The fan wheel is used to generate airflow, and the support 2 provides stability for the entire structure. This planar centrifugal fan with a PCB printed circuit stator coil is suitable for refrigerators with strict requirements on space, thickness, noise, and efficiency.

[0018] The wind turbine 1 is made of lightweight, high-strength materials, such as carbon fiber or engineering plastics, and is formed by injection molding or 3D printing.

[0019] The bracket 2 is made of aluminum alloy, providing good heat dissipation performance and structural strength.

[0020] The PCB board 31 has multiple layers stacked sequentially, and each coil 32 is arranged in an aligned manner. PCB printing technology is mature, suitable for mass production, with high production efficiency, low cost, good process consistency, and precise PCB stator coil layout, uniform magnetic field distribution, reduced energy loss, and improved power conversion efficiency.

[0021] The copper foil lines 33 of the coil 32 are rectangular frames, and the copper foil lines 33 that are successively reduced inward and distributed at equal intervals form the coil 32. The coil 32 has high layout precision and uniform magnetic field distribution. The permanent magnets 41 in the rotor assembly 4 are arranged along the axial polarity and interact with the axial magnetic field generated by the PCB stator assembly to drive the rotor and impeller 2 to rotate.

[0022] The PCB board 31 is ring-shaped and fixed at the center of the upper surface of the bracket 2, and its outer diameter is equal to the outer diameter of the bottom surface of the impeller 1.

[0023] Several embedding grooves 11 are provided on the lower end face of the wind turbine 1. The embedding grooves 11 are distributed along the circumference of the wind turbine 2. The permanent magnet 41 is embedded in the embedding groove 11 and protrudes from the embedding groove 11. The permanent magnet 41 is made of high-performance rare earth permanent magnet material, such as neodymium iron boron, and is arranged along the axial polarity.

[0024] The axial clearance between rotor assembly 4 and stator assembly 3 is as follows.

[0025] The working principle of this invention is as follows: When the coil 32 in the stator assembly 3 is energized, it generates an axial magnetic field, which interacts with the permanent magnet 41 in the rotor assembly 4 to form an axial magnetic pull, driving the rotor and impeller 2 to rotate. Because the stator coils are manufactured using PCB printed circuit technology, the coil layout is highly precise and the magnetic field distribution is uniform, effectively reducing vibration and noise during motor operation. At the same time, the PCB stator assembly is thin and compact, significantly reducing the overall thickness of the motor and meeting the space requirements of ultra-thin devices.

[0026] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A planar centrifugal fan employing a PCB printed circuit stator coil, comprising an impeller (1) and a support (2), wherein the impeller (1) is mounted on the central rotating shaft of the support (2), characterized in that: A stator assembly (3) is installed on the upper surface of the bracket (2), and a rotor assembly (4) is installed on the lower surface of the wind turbine (1). The rotor assembly (4) and the stator assembly (3) are axially opposite to each other. The stator assembly (3) includes a PCB board (31) and a coil (32). The coil (32) is arranged through copper foil lines (33) on the PCB board (31) and distributed circumferentially along the PCB board (31). The rotor assembly (4) includes several permanent magnets (41). The permanent magnets (41) are distributed circumferentially along the lower surface of the wind turbine (1). When the coil (32) is energized, it generates an axial magnetic field and drives the wind turbine (1) with the permanent magnets (41) to rotate.

2. The planar centrifugal fan employing a PCB printed circuit stator coil according to claim 1, characterized in that: The PCB board (31) has multiple layers stacked sequentially, and each coil (32) is arranged in an aligned manner.

3. The planar centrifugal fan employing a PCB printed circuit stator coil according to claim 1, characterized in that: The copper foil lines (33) of the coil (32) are rectangular frames, and the copper foil lines (33) that are successively narrowed inward and distributed at equal intervals constitute the coil (32).

4. The planar centrifugal fan employing a PCB printed circuit stator coil according to claim 1 or 2, characterized in that: The PCB board (31) is ring-shaped and fixed at the center of the upper surface of the bracket (2), and its outer diameter is equal to the outer diameter of the bottom surface of the wind turbine (1).

5. The planar centrifugal fan employing a PCB printed circuit stator coil according to claim 1, characterized in that: The wind turbine (1) has several embedded grooves (11) on its lower end surface. The embedded grooves (11) are distributed along the circumference of the wind turbine (1). The permanent magnet (41) is embedded in the embedded grooves (11) and protrudes from the embedded grooves (11).

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