Noise-reducing inductor
By forming an air gap groove at the bottom of the inductor and increasing the gap distance with the PCB board, the problem of mechanical noise generated by the inductor when passing through a large current is solved, and the noise reduction effect of the inductor is achieved, which is suitable for high-density assembly electronic products.
Patent Information
- Application Number
- CN202420705813.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-08
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-04-08
AI Technical Summary
In electronic products, inductor devices will cause mechanical noise when passing through large currents, mainly due to the increase in the jitter amplitude of the inductor coil enameled wire, which causes the inductor to periodically hit the PCB board, resulting in audible mechanical noise.
By forming an air gap groove at the bottom of the inductor, the gap distance between the bottom of the inductor and the surface of the PCB board is increased, thereby reducing the amplitude of the inductor when passing through a large current, and avoiding direct knocking on the PCB board and causing mechanical noise.
It effectively eliminates the amplitude of the inductor when passing through a large current, avoids the generation of mechanical noise, ensures the silent performance of electronic products, and is suitable for high-density assembly electronic products.
Smart Images
Figure CN222637029U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an inductor device, in particular to an improved inductor structure for reducing noise, and belongs to the technical field of basic electronic components. Background Art
[0002] Inductors are the most commonly used components in electronic devices and are widely used in various circuits to achieve the functions of filtering, energy storage, matching, and resonance. As electronic products become increasingly miniaturized and portable, and components are assembled with high density, inductor components have developed rapidly; and in consideration of electromagnetic compatibility, the ability of electronic products to resist electromagnetic interference has become a basic design requirement, which has increased the demand and application of inductors.
[0003] With the rapid development of electronic industries such as AI / cloud services / data centers, the density of electronic components on PCB boards in products is getting higher and higher. The power of electronic products with the same volume is also getting higher and higher. Especially in DC-DC transformer circuits, the input voltage remains unchanged at the same volume and the greater the power, the greater the input current will be. Therefore, when a larger current passes through the inductor on an electronic product, the enameled wire of the inductor coil will vibrate more, so that the body of the inductor will periodically and rhythmically hit the body of the PCB board, generating mechanical noise (20Hz-20kHz) that can be heard by humans. Summary of the invention
[0004] In view of the above-mentioned defects in the prior art, the purpose of the utility model is to provide an inductor, which optimizes the appearance structure of the device to eliminate the mechanical noise generated by the device in the application of electronic products.
[0005] The utility model provides a technical solution to achieve the above-mentioned purpose: an inductor for reducing noise, which is assembled by welding electrode pins to a PCB board, and in particular, an air gap groove with a larger distance relative to the surface of the PCB to which it is mounted is formed in the gap area of all electrode pins at the bottom of the inductor.
[0006] Furthermore, the inductor is integrally formed by a T-shaped magnetic core, an insulating conductive coil and a shell package, wherein the height of the electrode pin bent at the end of the conductive coil exposed from the bottom surface of the shell is increased by 0.5mm-1.5mm to form the air gap.
[0007] Furthermore, the inductor is integrally formed by a T-shaped magnetic core, an insulating conductive coil and a shell package, wherein the bottom side of the shell partially covers the bottom surface of the T-shaped magnetic core and is higher than the middle by a drop of 0.5mm to 1.5mm to form the air gap; the electrode pin bent at the end of the conductive coil is close to the bottom surface of the shell.
[0008] Furthermore, the inductor is integrally formed by a T-shaped magnetic core, an insulating conductive coil and a shell package, wherein the shell completely wraps the T-shaped magnetic core and the electrode pins bent at the ends of the conductive coil are close to the bottom surface of the shell, and the bottom surface of the shell is cut to form an air gap groove with a depth of 0.5mm~1.5mm.
[0009] Furthermore, the conductive coil is a coaxial multi-turn coil formed by winding a flat wire, or a single-turn coil formed by winding a wire with a square or circular cross-section, and both ends of the conductive coil are flattened and bent.
[0010] Furthermore, the inductor is integrally formed by a lower shell, an insulating conductive coil and a lower shell package, wherein the bottom surface of the lower shell is formed with an air gap groove with a depth of 0.5mm~1.5mm, and the surface of the lower shell is formed with an embedding groove that traverses its top and a pair of side surfaces, the conductive coil is a wire bent into a U shape and bent and clamped in the embedding groove, the two ends of the conductive coil are flattened and bent, and the formed electrode pins are tightly attached to the bottom surface of the lower shell except the air gap groove, and the upper shell cover is pressed on the top of the lower shell and encapsulates a part of the conductive coil.
[0011] Compared with the prior art, the advantages of using the inductor of the utility model are: under the premise of ensuring the normal welding and assembly of the inductor and the PCB board, the gap distance between the bottom of the inductor and the surface of the PCB board is increased, the amplitude of the inductor when passing a large current is eliminated, and the mechanical noise caused by directly hitting the PCB board is avoided. The sensor can be better applied to the CPU / GPU power supply hardware manufacturing in popular industries such as AI artificial intelligence / big data / cloud services. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a perspective structural diagram of an embodiment of the noise reduction inductor of the utility model.
[0013] Figure 2 It is a perspective structural diagram of another embodiment of the noise reduction inductor of the utility model.
[0014] Figure 3 It is a perspective structural diagram of another embodiment of the noise reduction inductor of the utility model.
[0015] Figure 4 It is a perspective structural diagram of another embodiment of the noise reduction inductor of the utility model. DETAILED DESCRIPTION
[0016] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.
[0017] In view of the fact that traditional inductors are prone to produce audible mechanical noise when large current is input in electronic products, in order to solve this noise problem, the utility model proposes an improved structural design of the inductor. Under conventional assembly conditions, the inductor is connected to the PCB board by welding through electrode pins, that is, the only part of the two that is in direct contact is the electrode pins, and the rest of the parts have no direct physical contact. As the focus of the structural improvement, the bottom of the inductor is formed with an air gap groove with an increased distance relative to the surface of the attached PCB in the gap area of all electrode pins.
[0018] like Figure 1 An embodiment of a noise reduction inductor is shown. The inductor 2 is formed by a T-shaped magnetic core 21, an insulating conductive coil 22a and a shell 23, and the bottom surface of the shell is flat in the finished product state. The key improvement is that the height of the electrode pin 221a bent at the end of the conductive coil 22a exposed to the bottom surface of the shell is increased by 0.5mm~1.5mm, and an air gap is formed between the two electrode pins, so that the distance between the bottom of the inductor and the PCB board 1 is large enough. The conductive coil is a single-turn coil formed by winding a wire with a square cross-section, and is sleeved and assembled on the T-shaped magnetic core, and the two ends of the conductive coil are flattened and bent to wrap the shell.
[0019] like Figure 2 Another embodiment of a noise reduction inductor is shown. The structure of the inductor 2 is basically the same as the above embodiment. The main difference is that the bending amplitude is not increased at both ends of the conductive coil, but the electrode pin 221b is close to the bottom surface of the shell as usual, and in the process of shell packaging, the T-shaped magnetic core of the conductive coil is not completely wrapped, but the bottom side partially covers the bottom surface of the T-shaped magnetic core, and the middle part is raised by 0.5mm~1.5mm, so as to form an air gap groove for lateral flow. As can be seen from the figure, the conductive coil 22b in this embodiment is a coaxial multi-turn coil formed by winding a flat wire.
[0020] like Figure 3Another embodiment of a noise reduction inductor is shown. The structural composition of the inductor 2 is also basically the same as the previous embodiment, and the electrode pin 221c bent at the end of the conductive coil 22c is still close to the bottom surface of the shell. The main difference is that during the packaging process, the shell completely wraps the T-shaped magnetic core, and in the product baking and finalizing state, an air gap groove 231 with a depth h between 0.5mm and 1.5mm is cut and formed on the bottom surface of the shell through other mechanical processing methods. In this embodiment, the conductive coil 22c is a single-turn coil formed by winding a wire with a circular cross-section, and is sleeved and assembled on the T-shaped magnetic core, and the two ends of the conductive coil are flattened and bent to wrap the shell.
[0021] like Figure 4 Another embodiment of a noise reduction inductor is shown. The inductor 3 is formed by a lower shell 31, an insulating conductive coil 32 and a lower shell 33 encapsulated in one piece. Specifically, the surface of the lower shell 31 is formed with a groove 311 that traverses the top and a pair of side surfaces, and the conductive coil 32 is a wire bent into a U shape and bent and clamped in the groove 311. The two ends of the conductive coil 32 are flattened and bent, and the formed electrode pins 321 are arranged close to the bottom surface of the lower shell 31, and the upper shell 33 is pressed and covered on the top of the lower shell 31 and encapsulates a portion of the conductive coil 32. The key improvement to this inductor is to refer to Figure 3 In the illustrated embodiment, the bottom surface of the lower shell is formed with an air gap groove 312 with a depth h ranging from 0.5 mm to 1.5 mm, and the motor pins 321 are arranged on both sides of the air gap groove 312 .
[0022] From the detailed description of several embodiments of the noise reduction inductor of the utility model, it can be seen that compared with the prior art, this solution has substantial characteristics and progress, and its technical effect is as follows: under the premise of ensuring the normal welding and assembly of the inductor and the PCB board, the gap distance between the bottom of the inductor and the surface of the PCB board is increased, the amplitude of the inductor when passing a large current is eliminated, and the mechanical noise generated by directly hitting the PCB board is avoided. The sensor can be better applied to the CPU / GPU power supply hardware manufacturing in popular industries such as AI artificial intelligence / big data / cloud services.
[0023] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.
Claims
1. A noise reducing inductor, assembled by welding electrode pins to a PCB board, characterized in that: The bottom of the inductor is formed with air gap grooves in the gap area of all electrode pins, and the air gap grooves have an increased distance relative to the surface of the PCB to which the inductor is mounted.
2. The noise reducing inductor according to claim 1, characterized in that: The inductor is integrally formed by a T-shaped magnetic core, an insulating conductive coil and a shell package, wherein the height of the electrode pin bent at the end of the conductive coil exposed from the bottom surface of the shell is increased by 0.5mm-1.5mm to form the air gap.
3. The noise reducing inductor according to claim 1, characterized in that: The inductor is integrally formed by a T-shaped magnetic core, an insulating conductive coil and a shell package, wherein the bottom side of the shell covers the bottom surface of the T-shaped magnetic core and is higher than the middle by a drop of 0.5mm to 1.5mm to form the air gap; the electrode pin bent at the end of the conductive coil is close to the bottom surface of the shell.
4. The noise reducing inductor according to claim 1, characterized in that: The inductor is integrally formed by a T-shaped magnetic core, an insulating conductive coil and a shell package, wherein the shell completely wraps the T-shaped magnetic core and the electrode pins bent at the ends of the conductive coil are close to the bottom surface of the shell, and the bottom surface of the shell is cut to form an air gap groove with a depth of 0.5mm~1.5mm.
5. The noise reducing inductor according to any one of claims 2 to 4, characterized in that: The conductive coil is a coaxial multi-turn coil formed by winding a flat wire, or a single-turn coil formed by winding a wire with a square or circular cross-section, and both ends of the conductive coil are flattened and bent.
6. The noise reducing inductor according to claim 1, characterized in that: The inductor is integrally formed by a lower shell, an insulating conductive coil and a lower shell package, wherein the bottom surface of the lower shell is formed with an air gap groove with a depth of 0.5mm~1.5mm, and the surface of the lower shell is formed with an embedding groove that traverses the top and a pair of side surfaces of the lower shell. The conductive coil is a wire bent into a U shape and bent and clamped in the embedding groove. Both ends of the conductive coil are flattened and bent. The formed electrode pins are closely attached to the bottom surface of the lower shell except the air gap groove. The upper shell cover is pressed on the top of the lower shell and encapsulates a part of the conductive coil.