A magnetic ring inductor structure for high current

Abstract

The utility model belongs to the technical field of magnetic ring inductance structure, specifically disclose a kind of large current's magnetic ring inductance structure, including flat conductor and plane magnetic ring;Flat conductor is sheet, middle section is horizontal, both ends are bent and perpendicular, the middle part through-hole of plane magnetic ring is sheet, including first plane magnetic ring and second plane magnetic ring, the both ends of flat conductor are respectively inserted into the middle part through-hole of first plane magnetic ring and second plane magnetic ring and fixed, the both ends of flat conductor are respectively exposed from downside and form pin on the side away from middle section.The utility model effectively increases the total effective length of magnetic circuit by two plane magnetic rings, and the magnetic ring of plane structure further effectively magnetic circuit cross-sectional area, increase magnetic flux.The setting of cooperation flat conductor improves the overcurrent capacity of magnetic ring inductance, and the area of conductor is also increased to improve the heat dissipation capacity, realize high reliability's large current magnetic ring inductance.

Description

Technical Field

[0001] This utility model belongs to the technical field of magnetic ring inductor structure, specifically relating to a high-current magnetic ring inductor structure. Background Technology

[0002] Current sensing inductors typically employ magnetic ring inductors. A magnetic ring inductor consists of a closed, ring-shaped magnetic material core, with a small-diameter circular copper wire passing directly through the central hole of the ring. The ends of the copper wire extend out as leads for circuit connections. When a changing current flows through the conductor passing through the magnetic ring, a changing magnetic field is generated inside the ring and in the surrounding space. According to Faraday's law of electromagnetic induction, this changing magnetic field induces an electromotive force (EMF) that opposes the change in current in the conductor itself (self-inductance) or in nearby conductors (mutual inductance), i.e., an induced voltage. The magnetic ring highly concentrates and guides magnetic field lines, enhancing the magnetic field and inductance effect, thereby increasing the inductance.

[0003] The physical dimensions of a magnetic ring, especially its cross-sectional area, determine the maximum magnetic flux it can carry. When the current is too large, the magnetic flux density will approach or exceed the saturation magnetic flux density of the ring material. At this point, the permeability of the ring will drop sharply, leading to a sharp decrease in inductance, accompanied by a significant increase in heat loss, i.e., magnetic saturation. Consequently, the effective magnetic circuit cross-sectional area of ​​the ring cannot accommodate a larger magnetic flux. Simultaneously, the poor electrical and thermal conductivity of small-diameter round copper wire further limits the improvement of the inductor's overcurrent performance. Utility Model Content

[0004] The technical problem to be solved by this invention is to overcome the defect of small overcurrent in the existing magnetic ring inductor, thereby providing a magnetic ring inductor structure with large current.

[0005] A high-current magnetic ring inductor structure, comprising a flat conductor and a planar magnetic ring; The flat conductor is sheet-shaped, with a horizontal middle section and bent and perpendicular ends; The central through hole of the planar magnetic ring is plate-shaped, including a first planar magnetic ring and a second planar magnetic ring. The two ends of the flat conductor are respectively inserted into the central through hole of the first planar magnetic ring and the second planar magnetic ring and fixed. The two ends of the flat conductor, away from the middle section, are exposed from the bottom to form pins.

[0006] Furthermore, it also includes a fixing adhesive, which is fixed to the lower side of the middle section of the flat conductor, and simultaneously fixes the first planar magnetic ring and the second planar magnetic ring.

[0007] Furthermore, the fixing adhesive is one of epoxy resin adhesive, silicone rubber, and hot melt adhesive.

[0008] Furthermore, a notch structure is formed in the lower center of the pin.

[0009] Furthermore, the notch structure is rectangular in shape.

[0010] Furthermore, the flat conductor is an integral copper busbar structure.

[0011] Furthermore, the width of the flat conductor is 5-10 mm, the length of the middle section of the flat conductor is 5-15 mm, and the length of both ends is 10-15 mm.

[0012] Furthermore, the thickness of the flat conductor is 0.5~2mm.

[0013] Furthermore, the length of the planar magnetic ring is 5~10mm.

[0014] Beneficial Effects: This utility model discloses a high-current magnetic ring inductor structure, including a flat conductor and a planar magnetic ring. The flat conductor is sheet-like, with a horizontal middle section and bent and vertical ends. The planar magnetic ring has a sheet-like through-hole in the middle, including a first planar magnetic ring and a second planar magnetic ring. The two ends of the flat conductor are respectively inserted into and fixed in the through-hole of the first and second planar magnetic rings. The ends of the flat conductor away from the middle section protrude from the bottom to form leads. This utility model effectively increases the total effective length of the magnetic circuit through the two planar magnetic rings, and the planar structure of the magnetic ring further increases the cross-sectional area of ​​the magnetic circuit, increasing the magnetic flux. Combined with the flat conductor, the overcurrent capability of the magnetic ring inductor is improved, and the increased conductor area also improves heat dissipation, achieving a highly reliable high-current magnetic ring inductor. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a front view of the magnetic ring inductor of this utility model; Figure 2 This is a side view of the magnetic ring inductor of this utility model; Figure 3 This is a top view of the magnetic ring inductor of this utility model; Figure 4 This is a front view of the flat conductor of this utility model; Figure 5 This is a side view of the flat conductor of this utility model; Explanation of reference numerals in the attached diagram: 1. Flat conductor; 2. Planar magnetic ring; 3. Fixing adhesive. Detailed Implementation

[0017] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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.

[0019] 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 at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] Reference Figures 1-5 As shown, this embodiment provides a high-current magnetic ring inductor structure, including a flat conductor and a planar magnetic ring; The flat conductor is sheet-shaped, with a horizontal middle section and bent and perpendicular ends; The central through hole of the planar magnetic ring is plate-shaped, including a first planar magnetic ring and a second planar magnetic ring. The two ends of the flat conductor are respectively inserted into the central through hole of the first planar magnetic ring and the second planar magnetic ring and fixed. The two ends of the flat conductor, away from the middle section, are exposed from the bottom to form pins.

[0022] This embodiment provides a high-current magnetic ring inductor structure. The two planar magnetic rings effectively increase the total effective length of the magnetic circuit, and the planar structure further enhances the cross-sectional area of ​​the magnetic circuit, increasing the magnetic flux. Combined with the flat conductor configuration, this improves the overcurrent capability of the magnetic ring inductor, and the increased conductor area also improves heat dissipation, resulting in a highly reliable high-current magnetic ring inductor.

[0023] Specifically, it also includes a fixing adhesive, which is fixed to the lower side of the middle section of the flat conductor, simultaneously fixing the first planar magnetic ring and the second planar magnetic ring. Through the use of the fixing adhesive, reliable fixation of the two planar magnetic rings is achieved through a simple process.

[0024] In this embodiment, the fixing adhesive is one of epoxy resin, silicone rubber, and hot melt adhesive. Preferably, the fixing adhesive is epoxy resin, which possesses high bonding strength, high hardness, high temperature resistance, low shrinkage, and excellent insulation properties, providing high temperature resistance and resistance to mechanical stress. In this embodiment, it is specifically a two-component epoxy adhesive.

[0025] As a further improvement to this embodiment, a notch structure is formed in the lower center of the pin. Specifically, the notch structure is rectangular in shape. The notch structure can promote solder spread and reduce bridging, improve solder wetting uniformity and reliability, and release thermomechanical stress, thereby improving the soldering quality of the pin during wave soldering or hot-dip tinning.

[0026] In this embodiment, the flat conductor is an integral copper busbar structure, which provides reliable conductivity and mechanical properties for the magnetic ring inductor.

[0027] In this embodiment, the width of the flat conductor is 5-10 mm, the length of the middle section is 5-15 mm, and the lengths of both ends are 10-15 mm. The thickness of the flat conductor is 0.5-2 mm. The length of the planar magnetic ring is 5-10 mm. Preferably, in this embodiment, the width of the flat conductor is 9.8 mm, the length of the middle section is 10 mm, and the lengths of both ends are 13.7 mm. The thickness of the flat conductor is 1 mm. The length of the planar magnetic ring is 10 mm.

[0028] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0029] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A high-current magnetic ring inductor structure, characterized in that, Including flat conductors and planar magnetic rings; The flat conductor is sheet-shaped, with a horizontal middle section and bent and perpendicular ends; The central through hole of the planar magnetic ring is plate-shaped, including a first planar magnetic ring and a second planar magnetic ring. The two ends of the flat conductor are respectively inserted into the central through hole of the first planar magnetic ring and the second planar magnetic ring and fixed. The two ends of the flat conductor, away from the middle section, are exposed from the bottom to form pins.

2. The high-current magnetic ring inductor structure according to claim 1, characterized in that, It also includes a fixing adhesive, which is fixed to the lower side of the middle section of the flat conductor, and simultaneously fixes the first planar magnetic ring and the second planar magnetic ring.

3. The high-current magnetic ring inductor structure according to claim 2, characterized in that, The fixing adhesive is one of epoxy resin adhesive, silicone rubber, and hot melt adhesive.

4. The high-current magnetic ring inductor structure according to claim 1, characterized in that, A notch structure is formed in the lower center of the pin.

5. The high-current magnetic ring inductor structure according to claim 4, characterized in that, The notch structure is rectangular in shape.

6. The high-current magnetic ring inductor structure according to claim 1, characterized in that, The flat conductor is an integral copper busbar structure.

7. The high-current magnetic ring inductor structure according to claim 1, characterized in that, The width of the flat conductor is 5-10 mm, the length of the middle section of the flat conductor is 5-15 mm, and the length of both ends is 10-15 mm.

8. The high-current magnetic ring inductor structure according to claim 1, characterized in that, The thickness of the flat conductor is 0.5~2mm.

9. The high-current magnetic ring inductor structure according to claim 1, characterized in that, The length of the planar magnetic ring is 5~10mm.

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