A direct current motor control board mounting structure

Abstract

The utility model discloses a kind of DC motor control panel mounting structures, comprising: the plastic package of plastic package post-stator and control panel main part of direct-current brushless motor, the control panel main part is installed in the inside of plastic package post-stator, and control element, drive circuit module and terminal interface are integrated on control panel main part;Positioning structure is set in the inner wall of the plastic package post-stator, and positioning structure includes locating post, the locating hole is opened in the control panel main part, and locating post is inserted into the inside of locating hole when control panel main part is installed in plastic package post-stator inside.The whole round control panel is improved to semicircle, and the control panel body of semicircle design reduces material use compared with traditional whole round control panel, and production cost is significantly reduced.

Description

Technical Field

[0001] This utility model relates to the field of encapsulated DC brushless motor technology, specifically a DC motor control board mounting structure. Background Technology

[0002] Plastic-encapsulated brushless DC motors are widely used in the air conditioning industry. They feature high efficiency, low noise, excellent speed regulation performance, precise control, moisture-proof and corrosion-resistant plastic-encapsulated structure, and high safety. They bring excellent energy efficiency and outstanding performance to air conditioning systems, perfectly meeting the high requirements of modern air conditioning.

[0003] However, the traditional mounting method for the PCB control board of a plastic-encapsulated brushless DC motor still has shortcomings: 1. The control board is soldered to the reserved terminals of the encapsulated motor. In DC brushless motors with Hall effect sensors, inaccurate installation of the control board will cause errors in the strength of the Hall effect sensors, which will lead to differences in motor performance. 2. The installation and positioning method of the encapsulated motor control board determines the size of the control board used. The existing control board material is a solid round plate, which is too large and leads to high cost pressure. 3. The control board of the encapsulated motor has a large area, which makes it inconvenient for workers to operate and difficult to position during production.

[0004] Therefore, we need to propose a DC motor control board mounting structure. Summary of the Invention

[0005] The purpose of this utility model is to provide a DC motor control board mounting structure. By improving the circular control board to a semi-circular shape, the semi-circular control board body reduces material usage compared to the traditional circular control board, significantly reducing production costs, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A DC motor control board mounting structure, comprising: The encapsulated stator and control board body of the encapsulated DC brushless motor, wherein the control board body is installed inside the encapsulated stator and integrates control elements, drive circuit modules and terminal interfaces; A positioning structure is provided on the inner wall of the encapsulated stator. The positioning structure includes a positioning post. The control board body has a positioning hole. When the control board body is installed inside the encapsulated stator, the positioning post is inserted into the positioning hole.

[0007] Preferably, the main body of the control board is made of epoxy resin substrate with a thickness of 0.8-1.2mm.

[0008] Preferably, the inner diameter of the positioning hole is 0.1-0.2 mm larger than the diameter of the positioning post.

[0009] Preferably, the main body of the control board is a three-quarter circle semicircle, and the edge of the main body of the control board is provided with protrusions, on which fixing screws are installed.

[0010] Preferably, the inner wall of the encapsulated stator is provided with a fixing ring, and a groove is provided on the fixing ring. A screw hole is provided in the groove on the inner wall of the encapsulated stator. When the control board body is installed inside the encapsulated stator, the protrusion on the control board body is inserted into the groove, and the fixing screw passes through the protrusion and is threaded into the screw hole.

[0011] Preferably, the terminal interface is located on the edge of the control board body, and the terminal interface includes power pins, signal pins and ground pins, with the soldering surface of the terminal interface facing the back of the control board body.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model improves the circular control board into a semi-circular one. The semi-circular control board body reduces material usage compared to the traditional circular control board, significantly reducing production costs. 2. By cooperating with the positioning hole and the positioning column, the relative position error between the Hall sensor and the rotor magnet is reduced, thereby reducing the fluctuation of motor performance. Attached Figure Description

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

[0014] In the diagram: 1. Control board; 2. Stator after plastic sealing; 3. Positioning post; 4. Protrusion; 5. Retaining ring; 6. Screw hole; 7. Positioning hole; 8. Groove. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1 This utility model provides a technical solution: A DC motor control board mounting structure, comprising: The encapsulated brushless DC motor comprises an encapsulated rear stator 2 and a control board 1. The control board 1 is installed inside the encapsulated rear stator 2 and integrates control components, a drive circuit module, and terminal interfaces. The control board 1 is made of an epoxy resin substrate with a thickness of 0.8-1.2 mm. The terminal interfaces are located on the edge of the control board 1 and include power pins, signal pins, and ground pins, with the soldering surface of the terminal interfaces facing the back of the control board 1.

[0017] By integrating core functional components (control components, drive circuit modules, and terminal interfaces) into the main body of the control board 1, and using a substrate of specific material and thickness, along with a reverse soldering design for the terminal interfaces, the electrical connection and physical adaptation between the control board 1 and the motor are achieved.

[0018] In summary, epoxy resin substrates (0.8-1.2mm) have the characteristics of good insulation and high mechanical strength, making them suitable for the moisture-proof and corrosion-resistant environment of encapsulated motors; reverse soldering of terminal interfaces (soldering side facing the back) avoids contact between the soldering point and the motor housing, preventing short circuits and improving safety; integrated design reduces wiring connections, reduces signal interference, and ensures motor control accuracy.

[0019] Please see Figure 1 : A positioning structure is installed on the inner wall of the stator after plastic sealing. The positioning structure includes a positioning post 3 and a positioning hole 7 on the main body of the control plate 1. When the main body of the control plate 1 is installed inside the stator 2 after plastic sealing, the positioning post 3 is inserted into the positioning hole 7. The inner diameter of the positioning hole 7 is 0.1-0.2 mm larger than the diameter of the positioning post 3.

[0020] During assembly, first align the positioning hole 7 of the main body of the control board 1 with the positioning post 3 inside the encapsulated stator 2, gently press to make the control board 1 fit against the surface of the stator, then fix it with screws, and finally solder the terminal interface to the motor lead wire; during assembly, the positioning post 3 is inserted into the positioning hole 7 to form a "clearance fit" to guide the control board 1 to be accurately aligned, simplifying the assembly process. Workers can quickly complete the pre-installation through the positioning structure, reducing the positioning difficulty and improving production efficiency.

[0021] Please see Figure 1 : The main body of the control board 1 is a three-quarter circle semicircle. A protrusion 4 is provided on the edge of the main body of the control board 1, and a fixing screw is installed on the protrusion 4. A fixing ring 5 is provided on the inner wall of the encapsulated stator 2. A groove 8 is provided on the fixing ring 5. A screw hole 6 is provided in the groove 8 on the inner wall of the encapsulated stator 2. When the main body of the control board 1 is installed inside the encapsulated stator, the protrusion 4 on the main body of the control board 1 is engaged with the groove 8, and the fixing screw passes through the protrusion 4 and is threaded into the screw hole 6.

[0022] In summary, the three-quarter circular design reduces material usage by 25% compared to the traditional full circular plate, thus lowering cost pressure. The protrusion 4, which engages with the groove 8, further restricts the circumferential rotation of the control board 1. Combined with screw fixing (which passes through the protrusion 4 and connects to the stator screw hole 6), it improves installation stability and prevents the control board 1 from shifting due to vibration during motor operation. The smaller board area makes it easier for workers to grasp and operate, solving the problem of inconvenience in the production of traditional large-size control boards 1. At the same time, the improved positioning accuracy results in lower fluctuations in the Hall signal.

[0023] The positioning post 3 provides initial positioning, and the contact area between the protrusion 4 and the groove 8 is 3 times larger than that of traditional single-point screw fixing, reducing local stress concentration on the substrate; the asymmetrical shape of the protrusion 4 and the groove 8 (such as D-shape) avoids reverse installation and reduces the assembly defect rate.

[0024] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A DC motor control board mounting structure, characterized in that, include: The encapsulated stator (2) and control board (1) of the encapsulated DC brushless motor are installed inside the encapsulated stator (2). The control board (1) integrates control elements, drive circuit modules and terminal interfaces. The positioning structure is set on the inner wall of the plastic-sealed stator. The positioning structure includes a positioning column (3). The main body of the control plate (1) is provided with a positioning hole (7). When the main body of the control plate (1) is installed in the plastic-sealed stator (2), the positioning column (3) is inserted into the positioning hole (7).

2. The DC motor control board mounting structure according to claim 1, characterized in that: The main body of the control board (1) is made of epoxy resin substrate with a thickness of 0.8-1.2mm.

3. The DC motor control board mounting structure according to claim 1, characterized in that: The inner diameter of the positioning hole (7) is 0.1-0.2 mm larger than the diameter of the positioning post (3).

4. The DC motor control board mounting structure according to claim 1, characterized in that: The main body of the control board (1) is a three-quarter circle semicircle, and the edge of the main body of the control board (1) is provided with a protrusion (4), and a fixing screw is installed on the protrusion (4).

5. The DC motor control board mounting structure according to claim 4, characterized in that: The inner wall of the plastic-sealed stator (2) is provided with a fixing ring (5), and a groove (8) is provided on the fixing ring (5). The inner wall of the plastic-sealed stator (2) is provided with a screw hole (6) located in the groove (8). When the main body of the control board (1) is installed inside the plastic-sealed stator, the protrusion (4) on the main body of the control board (1) is inserted into the groove (8), and the fixing screw passes through the protrusion (4) and is threaded into the screw hole (6).

6. The DC motor control board mounting structure according to claim 1, characterized in that: The terminal interface is located on the edge of the control board (1) body. The terminal interface includes power pins, signal pins and ground pins, and the soldering surface of the terminal interface faces the back of the control board (1) body.

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