Inductance device and electronic equipment

Abstract

The invention provides an inductance device and electronic equipment, the inductance device comprises a magnetic core shell, a magnetic core column and a winding, the magnetic core shell is internally provided with a winding cavity, and the winding cavity is provided with a top wall and a bottom wall which are oppositely arranged; the magnetic core column is arranged on the bottom wall and extends along one side close to the top wall, and an air gap is formed between the magnetic core column and the top wall; the winding is wound on the magnetic core column; the winding is limited between the air gap and the bottom wall, that is, the air gap and the winding are arranged in a staggered mode, the situation that eddy current loss is generated due to the fact that the air gap is arranged in the winding is avoided, energy consumption of the inductor device is reduced, and working stability of the inductor device is improved.

Description

Technical Field

[0001] This application belongs to the field of inductor technology, specifically applicable to switching power supply LLC resonant inductors, PFC inductors, DC / DC boost / buck inductors, etc., and particularly relates to an inductor device and electronic equipment. Background Technology

[0002] In current inductor designs, the air gap is usually placed inside the winding. This layout leads to a significant increase in winding eddy current losses in certain applications.

[0003] Specifically, the presence of the air gap causes more magnetic flux to leak out of the core, especially near the air gap where edge effects occur. When these high-frequency leakage fluxes pass through the winding, they induce currents inside the winding conductors that are at the same frequency as the alternating magnetic field in the induction medium. The eddy currents formed by these induced currents cause energy dissipation, leading to the conversion of electrical energy and thus generating winding eddy current losses.

[0004] Therefore, how to reduce the eddy current loss of inductors has become an urgent problem to be solved in the field of inductor technology. Summary of the Invention

[0005] The purpose of this application is to provide an inductor and an electronic device that aims to solve the problem of large eddy current losses in inductors in the conventional technology.

[0006] A first aspect of this application provides an inductor device, the inductor device comprising:

[0007] A magnetic core housing, wherein a winding cavity is provided inside the magnetic core housing, and the winding cavity has a top wall and a bottom wall disposed opposite to each other;

[0008] A magnetic core post is disposed on the bottom wall, and the magnetic core post extends along the side close to the top wall and forms an air gap with the top wall;

[0009] A winding is wound on the magnetic core post, and the winding is defined between the air gap and the bottom wall.

[0010] In some embodiments of this application, the magnetic core housing includes a first housing and a second housing that fit together with each other. The first housing is provided with a first groove, and the second housing is provided with a second groove. The first groove and the second groove communicate to define the winding cavity.

[0011] The depth of the first groove is less than the depth of the second groove, and the magnetic core post is disposed on the second groove.

[0012] In some embodiments of this application, the bottom wall is disposed in the second groove, the top wall is disposed in the first groove, and one end of the magnetic core column opposite to the bottom wall extends out of the second groove and defines the air gap with the top wall.

[0013] In some embodiments of this application, the diameter of the magnetic core column is smaller than the diameter of the first groove.

[0014] And / or, the diameter of the first tank is smaller than the diameter of the second tank.

[0015] In some embodiments of this application, the winding further includes an input pin and an output pin disposed on the same side, and the inductor further includes a pressure member, the pressure member including a fixing plate extending along a first direction, the first direction being the direction from the bottom wall to the top wall; the fixing plate is provided with at least two fixing holes, and the input pin and the output pin are connected and adapted to the at least two fixing holes.

[0016] In some embodiments of this application, the input pin and the output pin are soldered to the mounting plate.

[0017] In some embodiments of this application, the pressing component further includes a pressing ring, which is connected to the fixing plate and is disposed between the magnetic core column and the top wall.

[0018] In some embodiments of this application, the pressure ring is disposed perpendicular to the fixing plate.

[0019] In some embodiments of this application, the winding has a first plane for abutting against the pressure ring, and the winding is configured such that, when the input pin and the output pin are inserted into the at least two fixing holes, the first plane abuts against the pressure ring to press the winding between the air gap and the bottom wall.

[0020] Secondly, this application also provides an electronic device, which includes the aforementioned inductor.

[0021] The beneficial effects of the embodiments of the present invention compared with the prior art are as follows: The inductor device and electronic device described above include a magnetic core housing, a magnetic core column, and a winding. A winding cavity is provided inside the magnetic core housing, and the winding cavity has a top wall and a bottom wall disposed opposite to each other. The magnetic core column is disposed on the bottom wall and extends along the side near the top wall, forming an air gap with the top wall. The winding is wound on the magnetic core column. By confining the winding between the air gap and the bottom wall, that is, by misaligning the air gap and the winding, this application helps to avoid eddy current losses caused by the air gap being located inside the winding, thereby helping to reduce the energy consumption of the inductor device and improve its working stability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an inductor provided in an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the structure of an inductor provided in another embodiment of this application;

[0024] Figure 3 A three-dimensional structural schematic diagram of an inductor device provided in an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the structure of an inductor provided in yet another embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the structure of an inductor provided in another embodiment of this application;

[0027] Figure 6 This is a schematic diagram of the structure of an inductor provided in another embodiment of this application.

[0028] Specific element symbol explanations: 100-core housing, 110-winding cavity, 111-top wall, 112-bottom wall, 113-first slot, 114-second slot, 120-first housing, 130-second housing, 200-core column, 300-winding, 310-input pin, 320-output pin, 400-air gap, 500-pressing element, 510-fixing plate, 511-fixing hole, 520-pressure ring, 600-frame, a-first direction. Detailed Implementation

[0029] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0030] It should be noted that when a component is referred to as being "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] It's important to know that with the rapid development of electronic technology, the performance and structure of inductors, as crucial components in circuits, have become a key research focus due to their continuous optimization. An inductor is a device with a certain inductance; it only impedes changes in current. In an inductor, a wire or coil is wound around a magnetic material. When current flows through the inductor, a magnetic field is generated, which stores some electrical energy. When the current stops (or the circuit is broken) or changes direction, the magnetic field releases the stored energy, attempting to maintain a constant current and allow it to continue flowing in its original direction.

[0034] The structure of an inductor mainly includes a frame, windings, shielding, encapsulation material, and a magnetic core or iron core. The frame serves as the support for the wound coils, while the windings are a set of coils with a defined function and are the basic components of an inductor. Therefore, current inductor devices typically use a frame within the magnetic core to secure the windings. Because the frame is usually a relatively stable and well-formed frame structure, it can constrain the windings, preventing them from protruding and making electrical contact with the magnetic core.

[0035] In related technologies, inductors include a magnetic core housing, which is formed by the mating of an upper housing and a lower housing. A winding cavity can be formed between the upper and lower housings, and magnetic core posts are disposed within both housings. The two magnetic core posts are joined together for the winding to encircle. However, a gap, or air gap, is unavoidably formed at the contact point of the two magnetic core posts. In conventional technologies, since the winding is wound around two magnetic core posts, the air gap is formed in the middle of the winding; however, the presence of the air gap causes more magnetic flux to leak from the core, especially near the air gap, where an edge effect occurs. The portion of the air gap close to the winding will experience localized heating due to the influence of the edge magnetic flux, resulting in a decrease in efficiency.

[0036] Specifically, when these high-frequency leakage fluxes pass through the winding, they generate induced currents inside the winding conductors that are at the same frequency as the alternating magnetic field in the induction medium. The eddy currents formed by these induced currents cause energy dissipation and lead to the conversion of electrical energy, thus generating winding eddy current losses. In other words, this current layout leads to a significant increase in winding eddy current losses in certain application scenarios.

[0037] Therefore, this application makes improvements to the related inductor devices and electronic devices.

[0038] Please see Figure 1, Figure 1 A schematic diagram of the structure of the inductor device provided in this embodiment is shown. The inductor device of this embodiment includes a magnetic core housing 100, a magnetic core post 200, and a winding 300. A winding cavity 110 is disposed within the magnetic core housing 100, and the winding cavity 110 has a top wall 111 and a bottom wall 112 disposed opposite to each other. The magnetic core post 200 is disposed on the bottom wall 112, and extends along the side near the top wall 111, forming an air gap 400 with the top wall 111. The winding 300 is wound on the magnetic core post 200, and the winding 300 is confined between the air gap 400 and the bottom wall 112.

[0039] It should be explained that the core housing 100 is the basic structure of the inductor, supporting and protecting the components inside. The core housing 100 helps maintain the overall stability of the inductor while ensuring the correct positioning of the internal components. The winding cavity 110 is a specific area within the core housing 100 dedicated to accommodating the winding 300. The top wall 111 and bottom wall 112 of the winding cavity 110 are positioned opposite each other; this structure helps to fix the position of the winding 300, ensuring that it does not shift or deform during operation. The core pillar 200 is the core part of the inductor, determining its main magnetic properties. The air gap 400 formed between the core pillar 200 and the top wall 111 is a crucial part of the inductor's operation, affecting the inductance value. The winding 300 is typically made of conductive material, such as copper or aluminum wire. When current flows through the winding 300, a magnetic field is generated around the core pillar 200. The winding 300 is confined between the air gap 400 and the bottom wall 112. This layout helps to optimize the performance of the inductor while ensuring a stable and reliable current flow path in the winding 300.

[0040] Understandably, the entire inductor operates based on the law of electromagnetic induction. When current flows through the winding 300, a magnetic field is generated in the core post 200 and the surrounding space. The presence of the core post 200 enhances the strength of the magnetic field, while the air gap 400 affects its distribution. This specific structure gives the inductor a specific inductance value, thereby enabling the control and regulation of the current in the circuit.

[0041] In current inductor devices, the air gap 400 is typically located within the winding 300, which results in significant eddy current losses. However, this application addresses this issue by confining the winding 300 between the air gap 400 and the bottom wall 112, effectively misaligning the air gap 400 and the winding 300. This avoids the eddy current losses caused by the air gap 400 being located within the winding 300, thereby reducing the energy consumption of the inductor and improving its operational stability.

[0042] Specifically, firstly, the staggered arrangement prevents the air gap 400 from being directly located inside the winding 300, thereby reducing eddy current losses caused by the air gap 400. Eddy current losses are energy losses generated inside the conductor of an inductor due to changes in the magnetic field during operation, leading to increased energy consumption and reduced efficiency. By staggering the air gap 400 and the winding 300, eddy current losses can be significantly reduced, improving the energy conversion efficiency of the inductor. Secondly, reducing eddy current losses helps reduce the heat generated by the inductor during operation. Heat accumulation can cause the inductor temperature to rise, affecting its performance and stability. Reducing eddy current losses means reducing unnecessary heat generation, thus helping to maintain the temperature stability of the inductor and improving its operational reliability.

[0043] In some embodiments of this application, please refer to Figure 2 , Figure 2 A schematic diagram of the structure of the inductor device provided in this embodiment is shown. The magnetic core housing 100 of this embodiment includes a first housing 120 and a second housing 130 that fit together. A first groove 113 is provided on the first housing 120, and a second groove 114 is provided on the second housing 130. The first groove 113 and the second groove 114 communicate to define a winding cavity 110. The depth of the first groove 113 is less than the depth of the second groove 114, and the magnetic core post 200 is disposed on the second groove 114.

[0044] It should be explained that the first housing 120 and the second housing 130 are separate structures, which not only facilitates manufacturing and assembly but also helps with subsequent maintenance and component replacement. In some embodiments, the first housing 120 and the second housing 130 fit together to ensure a seal between them, preventing external factors such as dust or moisture from affecting the inside of the inductor.

[0045] Understandably, since the magnetic core post 200 is mounted on the second slot 114, the deeper second slot 114 can provide more stable and robust support for the magnetic core post 200. Conversely, the shallower first slot 113 can reduce unnecessary material usage, thereby lowering the cost and weight of the inductor.

[0046] Please refer to the embodiments described in this application. Figure 2 In this embodiment, the bottom wall 112 is disposed in the second groove 114, the top wall 111 is disposed in the first groove 113, and the end of the magnetic core column 200 away from the bottom wall 112 extends out of the second groove 114 and defines an air gap 400 with the top wall 111.

[0047] Understandably, this allows for precise control of the distance between the core post 200 and the top wall 111, ensuring that the size and shape of the air gap 400 meet design requirements. The air gap 400 is a crucial component of the inductor, affecting its magnetic properties and inductance. By precisely controlling the size and shape of the air gap 400, the performance of the inductor can be optimized, making it better suited for different applications.

[0048] Furthermore, extending one end of the magnetic core post 200 beyond the second slot 114 and defining an air gap 400 with the top wall 111 further improves the heat dissipation performance of the inductor. The presence of the air gap 400 creates a space between the magnetic core post 200 and the top wall 111, facilitating heat dissipation and transfer. This helps reduce the temperature generated by the inductor during operation, improving its operational stability and reliability.

[0049] Please refer to the embodiments described in this application. Figure 2 In this embodiment, the diameter of the magnetic core post 200 is smaller than the diameter of the first slot 113; the diameter of the first slot 113 is smaller than the diameter of the second slot 114. This ensures that the air gap 400 and the winding 300 are misaligned whether or not the transformer winding 300 uses a frame.

[0050] Please refer to the embodiments described in this application. Figure 2 And see Figure 3 , Figure 3 A three-dimensional structural schematic diagram of the inductor device provided in this embodiment is shown. The winding 300 of this embodiment also includes an input pin 310 and an output pin 320 arranged on the same side. The inductor device also includes a pressure member 500. The pressure member 500 includes a fixing plate 510 extending along a first direction a, where the first direction a is the direction from the bottom wall 112 to the top wall 111. The fixing plate 510 is provided with at least two fixing holes 511, and the input pin 310 and the output pin 320 are connected and adapted to the at least two fixing holes 511.

[0051] It should be explained that the input pin 310 and output pin 320 are located on the same side, meaning they are situated on the same side of the winding 300. This helps reduce the space occupied by the inductor on the circuit board and improves the circuit integration. The clamping member 500 is used to fix and stabilize the winding 300 and the positions of the input and output pins 320. The fixing plate 510 in the clamping member 500 extends along the first direction a, allowing the fixing plate 510 to fit tightly against the winding 300, providing effective support and fixation.

[0052] Understandably, by inserting the pins into the fixing holes 511, a secure connection can be achieved between the winding 300 and the clamping member 500, preventing the pins from loosening or falling off during operation due to vibration or external forces. This connection method is not only simple and reliable, but also has good stability and durability. Specifically, the clamping member 500 fixes the inductor pins, preventing them from moving freely and ensuring the creepage distance between the pins and the magnetic core.

[0053] Please refer to the embodiments described in this application. Figure 3 In this embodiment, the input pin 310 and the output pin 320 are soldered to the fixing plate 510.

[0054] Please refer to the embodiments described in this application. Figure 3 And see Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the structure of the inductor provided in this embodiment. Figure 5 This is another structural schematic diagram of the inductor device provided in this embodiment; the pressure member 500 in this embodiment also includes a pressure ring 520, which is connected to the fixing plate 510 and is placed between the magnetic core column 200 and the top wall 111.

[0055] It should be explained that the connection between the pressure ring 520 and the fixing plate 510, as well as its padding between the magnetic core post 200 and the top wall 111, enhances the structural stability of the inductor. Through the tight fit between the fixing plate 510 and the pressure ring 520, the various parts of the inductor are firmly fixed together, effectively preventing loosening or detachment of components due to vibration or external forces. This stable structure provides strong protection for the inductor's long-term, high-load operation. Specifically, the pressure ring 520 can press the winding 300 tightly, fixing it within the slot (between the air gap 400 and the bottom wall 112) to reduce eddy current losses.

[0056] Please refer to the embodiments described in this application. Figure 3 and Figure 4 In this embodiment, the pressure ring 520 is arranged perpendicular to the fixing plate 510.

[0057] Please refer to the embodiments described in this application. Figure 4 In this embodiment, the winding 300 has a first plane for abutting against the pressure ring 520, and the winding 300 is configured such that when the input pin 310 and the output pin 320 are inserted into at least two fixing holes 511, the first plane abuts against the pressure ring 520 to press the winding 300 between the air gap 400 and the bottom wall 112.

[0058] It should be explained that by confining the winding 300 between the air gap 400 and the bottom wall 112 by the pressure ring 520, it is ensured that the winding 300 maintains a stable shape and position during operation, reducing deformation or displacement of the winding 300 caused by factors such as vibration or temperature changes. This helps to maintain the stability of the magnetic properties of the inductor and improve its adaptability and reliability in various operating environments.

[0059] In some embodiments, the winding 300 may be a round wire, a multi-strand wire, a flat wire, a flat square wire, a PCB, etc.

[0060] In some embodiments of this application, please refer to Figure 6 , Figure 6 A schematic diagram of the structure of the inductor device provided in this embodiment is shown; the inductor device in this embodiment also includes a frame 600, which covers the winding 300 and is spaced between the winding 300 and the magnetic core post 200 and between the winding 300 and the air gap 400.

[0061] Understandably, the bobbin 600 in traditional inductor devices mainly serves only as a winding mechanism; however, the bobbin 600 in this application not only fixes the winding 300, but also acts as an isolation mechanism between the winding 300 and the air gap 400, preventing the magnetic core air gap 400 from being affected by the winding flux; furthermore, the assembly does not need to be fabricated based on the bobbin 600, which effectively reduces manufacturing difficulty and reduces leakage flux from an electrical perspective, thereby reducing copper loss and eddy current loss.

[0062] In some embodiments, an insulating coating is provided on the inner wall of the winding cavity 110, and the winding 300 can be fixed through the winding cavity 110 without the need for a bobbin.

[0063] Furthermore, in order to better implement the inductor in any of the above embodiments, this application also provides an electronic device based on the above inductor, the electronic device including the above inductor.

[0064] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0065] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0066] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0067] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0068] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An inductor device, characterized in that, The inductor includes: A magnetic core housing, wherein a winding cavity is provided inside the magnetic core housing, and the winding cavity has a top wall and a bottom wall disposed opposite to each other; A magnetic core post is disposed on the bottom wall, and the magnetic core post extends along the side close to the top wall and forms an air gap with the top wall; A winding is wound on the magnetic core post, and the winding is defined between the air gap and the bottom wall.

2. The inductor device according to claim 1, characterized in that, The magnetic core housing includes a first housing and a second housing that fit together with each other. The first housing is provided with a first groove, and the second housing is provided with a second groove. The first groove and the second groove communicate to define the winding cavity. The depth of the first groove is less than the depth of the second groove, and the magnetic core post is disposed on the second groove.

3. The inductor device according to claim 2, characterized in that, The bottom wall is disposed in the second groove, the top wall is disposed in the first groove, and the end of the magnetic core column opposite to the bottom wall extends out of the second groove and defines the air gap with the top wall.

4. The inductor device according to claim 3, characterized in that, The diameter of the magnetic core column is smaller than the opening diameter of the first groove; And / or, the diameter of the first tank is smaller than the diameter of the second tank.

5. The inductor device according to claim 1, characterized in that, The winding also includes an input pin and an output pin arranged on the same side. The inductor also includes a pressure member. The pressure member includes a fixing plate extending along a first direction, which is the direction from the bottom wall to the top wall. The fixing plate is provided with at least two fixing holes, and the input pin and the output pin are connected and adapted to the at least two fixing holes.

6. The inductor device according to claim 5, characterized in that, The input pin and the output pin are soldered to the mounting plate.

7. The inductor device according to claim 5, characterized in that, The pressure component also includes a pressure ring, which is connected to the fixing plate and is placed between the magnetic core column and the top wall.

8. The inductor device according to claim 7, characterized in that, The pressure ring is positioned perpendicular to the fixing plate.

9. The inductor device according to claim 8, characterized in that, The winding has a first plane for abutting against the pressure ring, and the winding is configured such that, when the input pin and the output pin are inserted into the at least two fixing holes, the first plane abuts against the pressure ring to press the winding between the air gap and the bottom wall.

10. An electronic device, characterized in that, The electronic device includes the inductor as described in any one of claims 1 to 9.

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