Novel capped rod-shaped inductor

Abstract

The utility model discloses a novel capped rod-shaped inductor, which comprises a magnetic core body, which is provided with a cylindrical magnetic core base body and a cylindrical magnetic enhancing body arranged at one end of the cylindrical magnetic core base body; the diameter of the cylindrical magnetic reinforcing body is larger than that of the cylindrical magnetic core base body; the flat wire is vertically wound in the axial direction of the cylindrical magnetic core base body; a gap is formed between the flat wire and the cylindrical magnetic core base body; the outer diameter of the flat wire is greater than the diameter of the cylindrical magnetic reinforcement body; the base is arranged at the bottom of the magnetic core body and used for supporting and fixing the inductance structure; and a flat wire pin, wherein the flat wire pin passes through the base. By optimizing the magnetic core body structure and the winding mode, the inductance value performance is improved, the loss is reduced, and the anti-electromagnetic interference capability is enhanced. The inductor has the advantages of simple structure, excellent performance, low cost and the like, and is suitable for various electronic circuit applications with high performance requirements.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of filter inductors, and particularly relates to a novel cap-equipped rod-shaped inductor. BACKGROUND

[0002] As a key component of electronic circuits, inductors play an important role in the fields of DC-DC converters, power filters and high-frequency circuits, etc. In recent years, with the vigorous development of portable electronic devices, new energy vehicles and industrial automation, the demand for inductors has increased dramatically. In order to meet the needs of different application scenarios, the design and technology of inductors have been continuously optimized and improved from traditional rod-shaped ferrite core inductors to planar inductors and multilayer inductors.

[0003] The filter inductors widely used in the market mainly adopt a rod-shaped ferrite core structure, and the wire gauge, the number of turns and the material and size of the core are adjusted to meet different performance requirements. However, the inductor with the traditional structure has the following limitations when facing high performance requirements: due to the limitation of the core structure and the winding mode, the magnetic field distribution is uneven, which makes it difficult to improve the inductance. Secondly, increasing the size of the core and the number of turns of the winding to improve performance leads to increased cost and large size. In addition, the core and winding design cannot effectively shield external electromagnetic interference, affecting the stability of the circuit.

[0004] Therefore, how to improve the high inductance, low loss, small size and strong anti-electromagnetic interference capability of the inductor is a problem to be solved. CONTENT OF THE INVENTION

[0005] The application provides a novel cap-equipped rod-shaped inductor, which aims to solve the problem of how to improve the high inductance, low loss, small size and strong anti-electromagnetic interference capability of the inductor in the prior art.

[0006] To achieve the above-mentioned purpose, the application provides a novel cap-equipped rod-shaped inductor, which comprises:

[0007] A core body, the core body has a cylindrical core base and a cylindrical magnetic reinforcing body arranged at one end of the cylindrical core base; the diameter of the cylindrical magnetic reinforcing body is greater than the diameter of the cylindrical core base;

[0008] A flat wire, the flat wire is vertically wound along the axial direction of the cylindrical core base; a gap is formed between the flat wire and the cylindrical core base; the outer diameter of the flat wire is greater than the diameter of the cylindrical magnetic reinforcing body;

[0009] A base, the base is arranged at the bottom of the core body and is used for supporting and fixing the inductor structure;

[0010] A flat wire pin, the flat wire pin penetrates through the base.

[0011] In one embodiment, the cylindrical magnetic core base and the cylindrical magnetic reinforcement are integrally formed.

[0012] In one embodiment, the bottom of the cylindrical magnetic core base is cemented with the base; a positioning ring is cemented below the cylindrical magnetic reinforcement; a gap is provided between the positioning ring and the flat wire close to one end of the cylindrical magnetic reinforcement.

[0013] In one embodiment, the magnetic core body is a soft magnetic ferrite core body.

[0014] In one embodiment, the flat wire is wound outside the cylindrical magnetic core base in a single-layer vertical winding manner.

[0015] In one embodiment, the flat wire pin is two groups, including a first flat wire pin and a second flat wire pin; the base is provided with a positioning hole for the flat wire pin to pass through.

[0016] In one embodiment, a Teflon sleeve is sleeved on the first flat wire pin.

[0017] The technical scheme of the present application proposes a new type of capped rod-shaped inductor. By optimizing the magnetic core body structure and winding method, the inductance performance is improved, the loss is reduced, and the anti-electromagnetic interference ability is enhanced. The inductor has the advantages of simple structure, excellent performance, low cost, etc., and is suitable for various high-performance electronic circuit applications. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0019] Figure 1 It is a three-dimensional structure schematic diagram of a new type of capped rod-shaped inductor according to an embodiment of the present application;

[0020] Figure 2 It is a schematic diagram of the magnetic core body structure according to an embodiment of the present application;

[0021] Figure 3 It is a schematic diagram of the flat wire and flat wire pin structure according to an embodiment of the present application;

[0022] Figure 4 It is a magnetic field distribution diagram of the prior art inductor;

[0023] Figure 5A magnetic field distribution diagram of a new type of capped rod-shaped inductor. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0025] It should be noted that all directionality indications (such as up, down, left, right, front, back, and the like) in the embodiments of the present application are only used to explain the relative positional relationship and movement between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directionality indications will also change accordingly.

[0026] It should also be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it can be directly on the other element or can have a middle element present at the same time. When an element is referred to as being “connected” to another element, it can be directly connected to the other element or can have a middle element present at the same time.

[0027] In addition, the description involving “first”, “second” and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as “first”, “second” can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is also not within the scope of protection claimed by the present application.

[0028] Referring to Figures 1-5 As shown in the drawings, the present application proposes a new type of capped rod-shaped inductor, comprising:

[0029] A magnetic core body 1, the magnetic core body 1 has a cylindrical magnetic core base body 11 and a cylindrical magnetic reinforcing body 12 arranged at one end of the cylindrical magnetic core base body 11; the diameter of the cylindrical magnetic reinforcing body 12 is greater than the diameter of the cylindrical magnetic core base body 11;

[0030] A flat wire 2, the flat wire 2 is vertically wound along the axial direction of the cylindrical magnetic core base body 11; a gap is formed between the flat wire 2 and the cylindrical magnetic core base body 11; the outer diameter of the flat wire 2 is greater than the diameter of the cylindrical magnetic reinforcing body 12;

[0031] A base 3, the base 3 is arranged at the bottom of the magnetic core body 1, and is used for supporting and fixing the inductor structure;

[0032] flat wire pin 4, the flat wire pin 4 passes through the base 3.

[0033] The magnetic core body 1 has a cylindrical magnetic core base 11 and a cylindrical magnetic reinforcing body 12 arranged at one end of the cylindrical magnetic core base 11. The diameter of the cylindrical magnetic reinforcing body 12 is greater than the diameter of the cylindrical magnetic core base 11, which can strengthen the magnetic field strength, especially at the cylindrical magnetic reinforcing body 12, the magnetic field is concentrated and strengthened, thereby improving the inductance performance. The flat wire 2 is vertically wound along the axial direction of the cylindrical magnetic core base 11, and a gap is formed between the flat wire 2 and the cylindrical magnetic core base 11. The outer diameter of the flat wire 2 is greater than the diameter of the cylindrical magnetic reinforcing body 12, which ensures that the winding can be stably wrapped on the magnetic core body 1. The base 3 is arranged at the bottom of the magnetic core body 1 for supporting and fixing the inductance structure. The flat wire pin 4 passes through the base 3 for connecting external circuits.

[0034] Specifically, according to the principle of electromagnetism, the magnetic field strength of the inductor is proportional to the inductance. In this embodiment, the cylindrical magnetic reinforcing body 11 is designed to concentrate and strengthen the magnetic field at this position. Referring to 3-4, the magnetic field strength at the cylindrical magnetic reinforcing body 11 is significantly higher than that in other areas, and the inductance performance can be significantly improved through the above design. Through comparison test, the inductance of the new cap rod inductor (magnetic core body 1) of this embodiment is compared with that of the traditional rod ferrite core inductor. The results show that the inductance of this embodiment is 10% higher than that of the traditional inductor core 1.

[0035] In addition, by adopting the flat wire vertical winding process, the self-induction effect of the coil is reduced, thereby reducing the loss. At the same time, the reduction of the number of turns and the reduction of the copper consumption also directly lead to the reduction of the direct current resistance, further reducing the loss.

[0036] The design of the cylindrical magnetic reinforcing body 11 not only strengthens the magnetic field strength, but also plays a role in shielding external electromagnetic interference. Especially above the product, due to the concentration of the magnetic field, it can effectively reduce the interference of magnetic radiation. In addition, the design of the semi-wrapped coil of the cylindrical magnetic reinforcing body 11 also reduces the electromagnetic radiation caused by the self-induction of the coil, thereby improving the anti-electromagnetic interference ability of the inductor.

[0037] In summary, the new cap rod inductor of this embodiment realizes the improvement of inductance performance, the reduction of loss and the enhancement of anti-electromagnetic interference ability by optimizing the structure of the magnetic core body and the winding mode. The inductor has the advantages of simple structure, excellent performance, low cost, etc., and is suitable for various high-performance electronic circuit applications.

[0038] In actual production process, the installation method of the new cap rod inductor of this embodiment is as follows:

[0039] The soft magnetic ferrite material is selected to process the cylindrical magnetic core base 11 and the cylindrical magnetic reinforcing body 12, and the cylindrical magnetic reinforcing body 12 is arranged at one end of the cylindrical magnetic core base 11.

[0040] The flat wire 2 (preferably 1.2*5 turns 12.5Ts) of a suitable gauge is vertically wound in the axial direction of the cylindrical magnetic core base 11, ensuring that a gap is formed between the flat wire 2 and the cylindrical magnetic core base 11, and the outer diameter of the flat wire 2 is greater than the diameter of the cylindrical magnetic reinforcing body 12.

[0041] The base 3 is arranged at the bottom of the magnetic core body 1 to support and fix the inductance structure.

[0042] The flat wire pin 4 is passed through the base 3 for connecting the external circuit.

[0043] The manufactured inductance is tested to ensure that its performance meets the requirements before packaging.

[0044] Through the above manufacturing method, the new type of capped rod-shaped inductance of the present application can be efficiently produced, and the performance of the inductance is stable and reliable.

[0045] In one embodiment, the cylindrical magnetic core base 11 and the cylindrical magnetic reinforcing body 12 are integrally formed.

[0046] Specifically, the integrally formed structure not only improves the performance of the inductance, but also significantly enhances the structural strength of the inductance. There is no joint between the cylindrical magnetic core base 11 and the cylindrical magnetic reinforcing body 12, so that the entire magnetic core body is more solid and durable. At the same time, the cementation of the bottom 3 of the cylindrical magnetic core base 11 with the base and the setting of the positioning ring 5 further enhances the bonding force between the inductance and the base, improves the stability and reliability of the inductance. This design makes the inductance maintain stable performance when subjected to external force impact or vibration, prolonging the service life of the inductance.

[0047] In one embodiment, the bottom 3 of the cylindrical magnetic core base 11 is cemented with the base; the positioning ring 5 is cemented below the cylindrical magnetic reinforcing body 12; and a gap is provided between the positioning ring 5 and the flat wire 2 near one end of the cylindrical magnetic reinforcing body 12.

[0048] Specifically, the cementation of the bottom 3 of the cylindrical magnetic core base 11 with the base ensures the secure installation of the inductor element. This cementation method not only provides strong mechanical support, but also prevents the inductor from loosening or shifting due to vibration or external force impact during use, thereby improving the structural stability and reliability of the inductor. The cylindrical magnetic reinforcement 12 is provided to enhance the magnetic field strength around the inductor, increasing the inductance. The addition of the positioning ring 5 further stabilizes the position of the cylindrical magnetic reinforcement 12, ensuring the uniformity and stability of the magnetic field distribution. This helps to reduce magnetic leakage and eddy current loss, improving the overall performance of the inductor. In addition, considering the actual installation process, the gap left between the positioning ring 5 and the flat wire 2 near one end of the cylindrical magnetic reinforcement 12 avoids direct contact and friction between the flat wire 2 and the positioning ring 5 during the inductor's operation. This design reduces heat and loss caused by friction, helping to reduce the inductor's temperature rise and power consumption, improving the inductor's efficiency and service life.

[0049] In summary, the cementation connection method between the cylindrical magnetic core base 11, the cylindrical magnetic reinforcement 12, the positioning ring 5, and the base, as well as the gap design between the positioning ring 5 and the flat wire 2, make the manufacturing and assembly process of the inductor more convenient. Not only does it reduce manufacturing costs, but it also improves production efficiency. Through cementation and the fixing method of the positioning ring 5, the various components inside the inductor are firmly connected together, forming a stable and solid whole. This enhances the inductor's ability to adapt to external environments, such as temperature changes and humidity changes, thereby improving the inductor's durability and reliability.

[0050] In one embodiment, the magnetic core body 1 is a soft magnetic ferrite core body.

[0051] Specifically, soft magnetic ferrite material has high magnetic permeability, and can produce stronger magnetic induction than other materials under the same magnetic field strength. Using soft magnetic ferrite as the magnetic core body 1 can increase the inductance of the inductor, making the inductor more effective in storing and releasing magnetic energy in the circuit; combined with the relatively low loss of soft magnetic ferrite material at high frequency, it reduces the energy loss of the inductor in high-frequency circuits, improving the overall efficiency of the circuit. Especially in high-frequency switching power supply, filter and other applications, low loss characteristics are particularly important. In addition, soft magnetic ferrite material has good temperature stability, and its magnetic properties change little in a wide temperature range. This means that the inductor can maintain relatively stable performance at different operating temperatures, improving the reliability and stability of the circuit.

[0052] In one embodiment, the flat wire 2 is wound around the outside of the cylindrical magnetic core base 11 in a single-layer vertical winding manner.

[0053] Specifically, the single-layer vertical winding mode can reduce the overlap and intersection between the coils, thereby reducing the self-induction effect, reducing the energy loss and heat generation of the inductor during operation. In actual application, the single-layer vertical winding mode increases the gap between the coils, which is beneficial to heat dissipation and improves the heat dissipation performance of the inductor, prolonging the service life of the inductor.

[0054] In addition, from the perspective of magnetic field distribution, the single-layer vertical winding mode makes the distribution of the coils on the magnetic core body more uniform, which helps to optimize the magnetic field distribution and improve the performance of the inductor.

[0055] In one embodiment, the flat wire pin 4 is two groups, and the flat wire pin 4 includes a first flat wire pin 41 and a second flat wire pin 42; the base 3 is provided with a positioning hole for the flat wire 2 pin to pass through.

[0056] Specifically, the design of the two groups of flat wire pins 41 and 42 increases the connection points of the inductor and the external circuit, improves the stability and reliability of the connection; the positioning hole on the base 3 provides an accurate installation position for the flat wire pin, facilitating the installation and positioning of the inductor and improving the assembly efficiency; the design of the two groups of flat wire pins can disperse the current and reduce the current density on a single pin, thereby enhancing the current transmission capacity and improving the carrying capacity of the inductor.

[0057] In one embodiment, the first flat wire pin 41 is sleeved with a Teflon sleeve.

[0058] Specifically, the Teflon sleeve has good insulation performance and can effectively isolate the electrical connection between the first flat wire pin 41 and the external circuit, preventing short circuit and leakage phenomena.

[0059] The above only describes some or preferred embodiments of the present application, neither the text nor the drawings can limit the scope of protection of the present application, any equivalent structural transformation using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the scope of protection of the present application.

Claims

1. A novel capped-rod inductor, characterized in that, It comprises: A magnetic core body, which has a cylindrical magnetic core base and a cylindrical magnetic reinforcing body arranged at one end of the cylindrical magnetic core base; the diameter of the cylindrical magnetic reinforcing body is greater than the diameter of the cylindrical magnetic core base; A flat wire, which is vertically wound in the axial direction of the cylindrical magnetic core base; a gap is formed between the flat wire and the cylindrical magnetic core base; the outer diameter of the flat wire is greater than the diameter of the cylindrical magnetic reinforcing body; A base, which is arranged at the bottom of the magnetic core body, for supporting and fixing the inductance structure; A flat wire pin, which passes through the base.

2. The novel capped rod-shaped inductor according to claim 1, characterized in that: The cylindrical magnetic core base and the cylindrical magnetic reinforcing body are integrally formed.

3. The novel capped rod-shaped inductor according to claim 1, characterized in that: The bottom of the cylindrical magnetic core base is cemented with the base; a positioning ring is arranged below the cylindrical magnetic reinforcing body; a gap is provided between the positioning ring and the flat wire near one end of the cylindrical magnetic reinforcing body.

4. The novel capped rod-shaped inductor according to claim 1, characterized in that: The magnetic core body is a soft magnetic ferrite core body.

5. The novel capped rod-shaped inductor according to claim 1, characterized in that: The flat wire is wound outside the cylindrical magnetic core base in a single-layer vertical winding mode.

6. The novel capped rod-shaped inductor according to claim 1, characterized in that: The flat wire pin is two groups, which includes a first flat wire pin and a second flat wire pin; the base is provided with a positioning hole for the flat wire pin to pass through.

7. The novel capped rod-shaped inductor according to claim 1, characterized in that: A Teflon sleeve is sleeved on the first flat wire pin.

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