Novel TLVR inductor

Abstract

A novel TLVR inductor relates to the technical field of inductors, and adopts the technical scheme that the novel TLVR inductor comprises a magnetic core and a coil; the magnetic core is provided with a pair of windows; the coil comprises a first coil and a second coil, each of the first coil and the second coil comprises a first section, a connecting section and a second section which are sequentially connected to form a U-shaped structure, the first section and the second section of the first coil are respectively inserted into the pair of windows, and the first section and the second section of the second coil are respectively inserted into the pair of windows; the second coil further comprises an annular section connected with the magnetic core, the side face of the connecting section of the second coil is connected with the inner wall of the annular section, and the connecting section of the first coil is located between the connecting section of the second coil and the annular section. The magnetic core provided by the utility model is windowed instead of being spliced by two pieces, so that an integrated structure is formed, and the risk of magnetic flux leakage is avoided; the cast copper sheet with the large cross section area is adopted as the coil, heat dissipation in the magnetic core is enhanced, and the direct-current resistance of the coil is reduced.

Description

Technical Field

[0001] This utility model relates to the field of inductor technology, and in particular to a novel TLVR inductor. Background Technology

[0002] The TLVR (Trans-inducer voltage regulator) structure is a relatively new VR (voltage regulator) power supply architecture that has emerged in recent years. Its biggest difference from the traditional DC-DC buck architecture is that it replaces the traditional single-wound inductor with a dual-wound, transformer-like TLVR inductor. This offers advantages such as fast transient response and reduced cost by decreasing the number of downstream capacitors. Typically, the core of a TLVR inductor consists of two cores joined together, with a gap between them. Although the two cores are glued together to fill this gap, the glue does not shield the magnetic flux, and a small amount of flux still leaks out. On a densely packed circuit board, this leakage can cause electromagnetic interference to surrounding components. Utility Model Content

[0003] To address the problem of electromagnetic interference to surrounding components caused by the core leakage flux of existing TLVR inductors, this invention provides a novel TLVR inductor.

[0004] This utility model provides the following technical solution: a novel TLVR inductor, comprising:

[0005] A magnetic core, wherein the magnetic core is provided with a pair of windows;

[0006] The coil includes a first coil and a second coil. Both the first coil and the second coil include a first segment, a connecting segment, and a second segment connected in sequence to form a U-shape. The first segment and the second segment of the first coil are respectively inserted into a pair of windows, and the first segment and the second segment of the second coil are respectively inserted into a pair of windows. The second coil also includes an annular segment connected to a magnetic core. The side of the connecting segment of the second coil is connected to the inner wall of the annular segment. The connecting segment of the first coil is located between the connecting segment and the annular segment of the second coil.

[0007] Preferably, the magnetic core is provided with at least one pair of windows, and each pair of windows is connected to the coil.

[0008] Preferably, the U-shaped structures of the first coil and the second coil are arranged in parallel, and a gap is provided between the U-shaped structures of the first coil and the second coil.

[0009] Preferably, the magnetic core is made of manganese-zinc ferrite, and the first coil and the second coil are both made of copper with a surface electroplated matte tin.

[0010] Preferably, the cross-sectional area of ​​the second coil is larger than that of the first coil.

[0011] Preferably, the first and second segments of the first coil are further provided with bent sections at their ends, and the bent sections are fitted with the positioning groove of the magnetic core.

[0012] The beneficial effects of this invention are: the magnetic core has an open window instead of being made of two pieces spliced ​​together, presenting an integrated structure, eliminating the risk of magnetic flux leakage; the use of a cast copper sheet with a large cross-sectional area as the coil not only enhances heat dissipation inside the magnetic core, but also reduces the DC resistance of the coil. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of one embodiment of an inductor.

[0014] Figure 2 This is a top view of one embodiment of an inductor.

[0015] Figure 3 This is a cross-sectional view of one embodiment of an inductor.

[0016] Figure 4 This is a three-dimensional schematic diagram of one embodiment of the magnetic core.

[0017] Figure 5 This is a three-dimensional schematic diagram of one embodiment of the second coil.

[0018] Figure 6 This is a side view of one embodiment of the second coil.

[0019] Figure 7 This is a three-dimensional schematic diagram of one embodiment of the first coil.

[0020] Reference numerals: 10, magnetic core; 11, window; 12, positioning groove; 20, first coil; 21, first segment; 22, connecting segment; 23, second segment; 24, bending segment; 30, second coil; 31, ring segment. Detailed Implementation

[0021] The embodiments of this utility model will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement them after reading this specification. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0022] This utility model provides, for example Figure 1-7 The present invention relates to a novel TLVR inductor, comprising a magnetic core 10 and a coil inserted into the magnetic core 10.

[0023] The magnetic core 10 may be a manganese-zinc ferrite core, and the magnetic core 10 is provided with at least one pair of windows 11 penetrating the magnetic core 10. Please refer to... Figure 4 In this embodiment, the magnetic core 10 is provided with two pairs of windows 11. The magnetic core with this structure is an integral piece, and there is no risk of magnetic flux leakage.

[0024] Please refer to Figure 1 , 2 Each pair of windows 11 is connected to a coil. This embodiment includes two sets of coils symmetrically arranged about the central axis of the magnetic core 10. Each set of coils includes a first coil 20 and a second coil 30. Please refer to... Figure 5-7 Both the first coil 20 and the second coil 30 are single-turn coils, comprising a first segment 21, a connecting segment 22, and a second segment 23 connected in a U-shape. Both the first and second coils are cast from pure copper with a surface-plated matte tin finish, which not only has the advantage of high thermal conductivity, effectively transferring internal core temperature to the outside and improving heat dissipation efficiency, but also significantly reduces the coil's DC resistance (DCR). Both the first and second coils are inserted into the same pair of windows 11. For details, please refer to... Figure 2 , 3 The first and second segments of the first coil 20 are respectively inserted into a pair of windows 11; the first and second segments of the second coil 30 are respectively inserted into a pair of windows 11; the U-shaped structures of the first coil 20 and the second coil 30 are arranged in parallel, and a gap is provided between the U-shaped structures of the first coil 20 and the second coil 30 to improve safety.

[0025] The second coil 30 also includes an annular segment 31 connected to the magnetic core 10. The side of the connecting segment 22 of the second coil 30 is connected to the inner wall of the annular segment 31. The connecting segment 22 of the first coil 20 is located between the connecting segment 22 of the second coil 30 and the annular segment 31. The annular segment 31 serves to reduce copper loss and also to dissipate heat to lower the internal temperature of the magnetic core.

[0026] The first coil 20 has a bent section 24 at the end of the first segment 21 and the second segment 23. During assembly, the end of the first coil 20 is not bent. The second coil can be inserted into a pair of windows 11 first, and then the first coil can be inserted. Then, a tool is used to bend the end of the first coil to fit the positioning groove 12 at the bottom of the magnetic core 10. Finally, epoxy glue is used to fix the first coil.

[0027] Preferably, the cross-sectional area of ​​the second coil 30 is larger than that of the first coil 20, and the second coil is thicker than the first coil. The purpose of this is that the larger cross-sectional area and thickness can reduce losses and conduct away the heat inside the magnetic core.

[0028] The above describes one or more embodiments of this utility model in a relatively specific and detailed manner, but it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A novel TLVR inductor, characterized in that, include: A magnetic core, wherein the magnetic core is provided with a pair of windows; The coil includes a first coil and a second coil. Both the first coil and the second coil include a first segment, a connecting segment, and a second segment connected in sequence to form a U-shape. The first segment and the second segment of the first coil are respectively inserted into a pair of windows, and the first segment and the second segment of the second coil are respectively inserted into a pair of windows. The second coil also includes an annular segment connected to a magnetic core. The side of the connecting segment of the second coil is connected to the inner wall of the annular segment. The connecting segment of the first coil is located between the connecting segment and the annular segment of the second coil.

2. The novel TLVR inductor according to claim 1, characterized in that, The magnetic core is provided with at least one pair of windows, and the coil is inserted into each pair of windows.

3. The novel TLVR inductor according to claim 1, characterized in that, The U-shaped structures of the first coil and the second coil are arranged in parallel, and a gap is provided between the U-shaped structures of the first coil and the second coil.

4. The novel TLVR inductor according to claim 1, characterized in that, The magnetic core is made of manganese-zinc ferrite, and the first and second coils are both made of copper with a surface electroplated matte tin.

5. A novel TLVR inductor according to claim 1, characterized in that, The cross-sectional area of ​​the second coil is larger than that of the first coil.

6. A novel TLVR inductor according to claim 1, characterized in that, The first and second sections of the first coil are further provided with bent sections at their ends, and the bent sections are fitted with the positioning grooves of the magnetic core.

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