Highly coupled inductor
The highly coupled inductor design addresses stray inductance and capacitance issues by arranging multiple coils with insulating gaps, enhancing power output and efficiency while reducing volume in electronic devices.
Patent Information
- Application Number
- DE202025107423
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2026-01-22
- Estimated Expiration
- 2035-12-31
AI Technical Summary
Existing transformers and inductive elements suffer from stray inductance and distributed capacitance, leading to electromagnetic interference, oscillation, and increased losses, which hinder high power output and efficiency in electronic devices.
A highly coupled inductor design featuring multiple coils arranged side by side with insulating gaps and magnetic cores, reducing stray inductance and enhancing coupling efficiency.
The design achieves high power output, increased coupling efficiency, and reduced volume, facilitating the assembly of compact electronic devices.
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Abstract
Description
[0001] The present utility model relates to an inductor, in particular a highly coupled inductor, which can deliver high power and reduce the stray inductance of a coil.
[0002] When using transformers / inductive elements, stray inductance, together with the distributed capacitance in the circuit and the distributed capacitance of the transformer coil, forms a resonant circuit. This causes the circuit to oscillate and radiate electromagnetic energy, resulting in electromagnetic interference. Furthermore, stray inductance and distributed capacitance can cause surge currents during transmission, leading to increased losses. The current development trend in electronic devices is toward high power output and high efficiency. Therefore, it is crucial to develop a transformer / inductive element that can increase power output and reduce coil stray inductance, enabling electronic devices to operate more efficiently.
[0003] The purpose of this utility model is to offer a highly coupled inductor in order to overcome the disadvantages of the prior art. This utility model is characterized by high coupling, achieved by arranging several coils side by side, which enables high power output, increases coupling efficiency, and reduces leakage inductance. It is also characterized by a reduction in the overall volume of the inductor, which facilitates the assembly of small electronic devices.
[0004] To solve this problem, the present utility model proposes a high-coupled inductor comprising at least one primary magnetic core having a receiving space extending through it, a first coil removably arranged in the receiving space, at least one second coil having a mounting section and removably arranged in a space defined by the first coil, and a secondary magnetic core having a projection and removably arranged in a space defined by the second coil, wherein the projection is removably arranged in the mounting section. In the assembled state, the secondary magnetic core, the second coil, and the first coil are arranged as a whole within the receiving space of the primary magnetic core. Fig. Figure 1 shows a schematic representation of a highly coupled inductor of a first embodiment of the present utility model in a disassembled state. Fig. Figure 2 shows a schematic representation of the highly coupled inductor of the first embodiment of the present utility model in a partially disassembled state. Fig. Figure 3 shows a representation of the highly coupled inductor of the first embodiment of the present utility model in its assembled state. Fig. Figure 4 shows a schematic section view according to the section plane IV-IV in Fig. 3. Fig. Figure 5 shows a schematic representation of a highly coupled inductor of a second embodiment of the present utility model in a disassembled state. Fig. Figure 6 shows a schematic representation of a highly coupled inductor of a third embodiment of the present utility model in a disassembled state. [First embodiment]
[0005] It will be directed to the Fig. 1, Fig. 2, Fig. 3 to Fig. 4. Referenced, whereby Fig. 1 a schematic representation of a highly coupled inductor 100a of a first embodiment of the present utility model in a disassembled state, Fig. 2 a schematic representation of the highly coupled inductor 100a of the first embodiment of the present utility model in a partially disassembled state, Fig. 3 a representation of the highly coupled inductor 100a of the first embodiment of the present utility model in its assembled state and Fig. 4 a schematic sectional view according to the section plane IV-IV in Fig. 3 shows. As in Fig. As shown in Figure 1, the highly coupled inductor 100a comprises a primary magnetic core 1, which has a receiving space S extending through it, a first coil 2, at least one second coil 3, and a secondary magnetic core 4. The first coil 2 is removably arranged in the receiving space S. The at least one second coil 3 has a mounting section and is removably arranged in a space defined by the first coil 2. The secondary magnetic core 4 has a projection 41 and is removably arranged in a space defined by the at least one second coil 3. In the assembled state, the secondary magnetic core 4, the at least one second coil 3, and the first coil 2 are arranged as a whole in the receiving space S of the primary magnetic core 1.In practical applications, the materials of the primary magnetic core 1 and the secondary magnetic core 4 can be ferrite or other soft magnetic materials, but are not limited to these. In the present embodiment, the primary magnetic core 1 can be a one-piece formed magnetic core and the secondary magnetic core 4 a convex magnetic core, but this is not limited to the present utility model.
[0006] In the present embodiment, the first coil 2 can be gate-shaped or Ω-shaped and has a gap G. In particular, the first coil 2 consists of a first section 21 of the first coil, a second section 22 of the first coil, and two connecting sections 23. The first section 21 and the second section 22 of the first coil can be gate-shaped coils of similar size and shape. However, the first section 21 and the second section 22 of the first coil are not in contact with each other but have a gap between them, with the first section 21 and the second section 22 of the first coil being connected to form a whole by two connecting sections 23.
[0007] The primary magnetic core 1 is isolated from the first coil 2, the first coil 2 from the second coil 3, and the second coil 3 from the secondary magnetic core 4.
[0008] It is further provided that the first section 21 of the first coil comprises two first vertical pins 21a, 21b of the first coil and a first crossbeam 21c of the first coil, wherein the two first vertical pins 21a, 21b of the first coil are connected to each other via the first crossbeam 21c of the first coil. The second section 22 of the first coil comprises two second vertical pins 22a, 22b of the first coil and a second crossbeam 22c of the first coil, wherein the two second vertical pins 22a, 22b of the first coil are connected to each other via the second crossbeam 22c of the first coil.Furthermore, one of the connecting sections 23 is connected to the lower end of the first vertical pin 21a of the first coil and the lower end of the second vertical pin 22a of the first coil, while the other connecting section 23 is connected to the lower end of the first vertical pin 21b of the first coil and the lower end of the second vertical pin 22b of the first coil.
[0009] In the present embodiment, the second coil 3 can be a gate-shaped coil and has two vertical pins 3a, 3b and a crossbar 3c, wherein the two vertical pins 3a, 3b are each perpendicular to the crossbar 3c and are connected to each other via the crossbar 3c. Each of the two vertical pins 3a, 3b is connected at one end to a contact pad 3d of the second coil.
[0010] Furthermore, the two vertical pins 3a, 3b of the second coil are arranged perpendicular to the two contact pads 3d of the second coil, with the two contact pads 3d of the second coil extending towards each other from the point where they are connected to the two vertical pins 3a, 3b of the second coil. A space exists between the facing ends of the two contact pads 3d of the second coil, which is defined as the assembly section 3e.
[0011] It will be directed to the Fig. Reference is made to Figure 2, which shows a schematic representation of the highly coupled inductor 100a of the first embodiment of the present utility model in a partially disassembled state. Fig. As shown in Figure 2, the receiving space S is a T-shaped space passing through the primary magnetic core 1. To assemble the high-coupled inductor 100a, the secondary magnetic core 4 is positioned in the space defined by the second coil 3 such that the projection 41 of the secondary magnetic core 4 is located in the assembly section 3e. Furthermore, a portion of the second coil 3 is positioned in the gap G of the first coil 2, so that a portion of the first coil 2 and a portion of the second coil 3 lie adjacent to each other. However, there is a gap between the first coil 2 and the second coil 3; that is, the first coil 2 and the second coil 3 are isolated from each other.It is particularly important to note that if the first coil 2 and the second coil 3 are made of or coated with an insulating material, so that the first coil 2 and the second coil 3 are insulated from each other, there can be no gap between the first coil 2 and the second coil 3.
[0012] If part of the second coil 3 is arranged in the gap G of the first coil 2, such that part of the first coil 2 and part of the second coil 3 are adjacent, the connecting sections 23 and the contact pads 3d of the second coil extend in opposite directions.
[0013] As can be seen from Fig. 3 and Fig. 4 results in the receiving space S being a T-shaped space passing through the primary magnetic core 1, such that when the highly coupled inductor 100a is in its assembled state, at least one side surface of the first coil 2 and the second coil 3 as well as at least one side surface of each connecting section 23 are exposed in the receiving space S. [Second embodiment]
[0014] It will be directed to the Fig. Reference is made to Figure 5, which shows a schematic representation of a highly coupled inductor 100b of a second embodiment of the present utility model in a disassembled state. The primary magnetic core 1, the first coil 2, the second coil 3 and the secondary magnetic core 4 shown in the second embodiment have essentially the same structure as the primary magnetic core 1, the first coil 2, the second coil 3 and the secondary magnetic core 4 shown in Figure 5. Fig. 1 are shown, with the difference that the number in Fig. The second coils 3 shown in Figure 5 are more than one (for example, the number of second coils 3 is two). Depending on the practical application, the number of second coils 3 can be two, three, four, or more, which is not limited by this utility model. The components mentioned above are assembled in essentially the same way as the one shown in Figure 5. Fig. 1, Fig. 2, Fig. 3 to Fig. The 4 highly coupled inductor 100a shown here requires no further explanation.
[0015] It is particularly noteworthy that the second coil 3 of the highly coupled inductor 100b of the present utility model comprises a first section 31 of the second coil and a second section 32 of the second coil, wherein the first section 31 of the second coil and the second section 32 of the second coil are similarly shaped and dimensioned and have a gap between them. The first section 31 of the second coil has two first vertical pins 31a, 31b of the second coil and a first crossbar 31c of the second coil connecting them, wherein the two first vertical pins 31a, 31b of the second coil are each provided at one end with a contact pad 31d, wherein the two contact pads 31d each extend perpendicular to the two first vertical pins 31a, 31b of the second coil and face each other.The second section 32 of the second coil has two second vertical pins 32a, 32b of the second coil and a second crossbar 32c of the second coil connecting them, wherein the two second vertical pins 32a, 32b of the second coil are each provided at one end with a contact pad 32d, wherein the two contact pads 32d each run perpendicular to the two second vertical pins 32a, 32b of the second coil and extend towards each other.
[0016] Similar to the two contact pads 31d, which have a space between them, there is also a space between the two contact pads 32d. In the second embodiment, these two spaces are defined together as assembly section 3e.
[0017] Similarly, to assemble the highly coupled inductor 100b, the secondary magnetic core 4 is arranged in the space defined by the second coil 3 such that the projection 41 of the secondary magnetic core 4 is located in the assembly section 3e.
[0018] Similarly, the primary magnetic core 1 is insulated from the first coil 2, the first coil 2 from the second coil 3, and the second coil 3 from the secondary magnetic core 4. [Third embodiment]
[0019] It will be directed to the Fig. Reference is made to Figure 6, which shows a schematic representation of a highly coupled inductor 100c of a third embodiment of the present utility model in a disassembled state. The first coil 2 and the second coil 3, which are in Fig. The components shown in Figure 6 are essentially the same as the first coil 2 and the second coil 3 of the highly coupled inductor 100a of the diagram. Fig. The components shown in Figure 1 are constructed as described in the first embodiment and do not require further explanation here. The difference between the highly coupled inductor 100c of the present utility model on the one hand, and the highly coupled inductor 100a of the first embodiment and the highly coupled inductor 100b of the second embodiment on the other hand, lies in the fact that the primary magnetic core 1 of the in Figure 1 is constructed as shown in Figure 1. Fig. The highly coupled inductor 100c shown in Figure 6 has the shape of a double-C or a double-E.
[0020] In particular, the primary magnetic core 1 of the highly coupled inductor 100a of the in Fig. 1, Fig. 2, Fig. 3 to Fig. 4 first embodiment shown and the primary magnetic core 1 of the highly coupled inductor 100b of the in Fig. In the second embodiment shown in Figure 5, the secondary magnetic core 4 and the primary magnetic core 1 are each formed in one piece and each have a continuous receiving space S inside. Furthermore, in the highly coupled inductor 100a and the highly coupled inductor 100b, the secondary magnetic core 4 and the primary magnetic core 1 are independent and separate elements. In contrast to the highly coupled inductor 100a of the first embodiment and the highly coupled inductor 100b of the second embodiment, the primary magnetic core 1 of the highly coupled inductor 100c of the third embodiment comprises a first magnetic core 11 and a second magnetic core 12, wherein the first magnetic core 11 and the second magnetic core 12 can be symmetrically shaped E-shaped magnetic cores.
[0021] It is further provided that the first magnetic core 11 comprises a first magnetic core body 11a, two first extension sections 11b, 11c and a first central section 11d, wherein the two first extension sections 11b, 11c together with the first central section 11d define a recess in the first magnetic core body 11a. The second magnetic core 12 comprises a second magnetic core body 12a, two second extension sections 12b, 12c and a second central section 12d, wherein the two second extension sections 12b, 12c together with the second central section 12d define a recess in the second magnetic core body 12a.
[0022] Furthermore, the first magnetic core 11 and the second magnetic core 12 are arranged symmetrically, such that the first two extension sections 11b, 11c are perpendicular to the first magnetic core 11 and extend towards the second magnetic core 12, while the second two extension sections 12b, 12c are perpendicular to the second magnetic core 12 and extend perpendicularly towards the first magnetic core 11. The first extension section 11b and the second extension section 12b are paired and extend towards each other, while the first extension section 11c and the second extension section 12c are paired and extend towards each other. The first central section 11d and the second central section 12d are paired.For assembly, the first magnetic core 11 and the second magnetic core 12 are joined together such that the first extension section 11b and the second extension section 12b are adjacent to each other and the first extension section 11c and the second extension section 12c are adjacent to each other, wherein a part of the first section 21 of the first coil is arranged in the recess in the first magnetic core body 11a defined by the two first extension sections 11b, 11c and the first central section 11d, while a part of the second section 22 of the first coil is arranged in the recess in the second magnetic core body 12a defined by the two second extension sections 12b, 12c and the second central section 12d.
[0023] The first central section 11d and the second central section 12d resemble the secondary magnetic core 4 of the highly coupled inductor 100a of the in Fig. 1, Fig. 2, Fig. 3 to Fig. 4 first embodiment shown and the secondary magnetic core 4 of the highly coupled inductor 100b of the second embodiment according to Fig. 5. In particular, the first central section 11d and the second central section 12d can be in contact with each other in the assembled state to create a structure corresponding to the secondary magnetic core 4 of the in Fig. 1, Fig. 2, Fig. 3 to Fig. 4 highly coupled inductor 100a shown and the one in Fig. 5 resembles the highly coupled inductor 100b shown and is arranged in the space defined by the first coil 2.
[0024] It is particularly important to note that the first central section 11d has a first projection 11d' and the second central section 12d has a second projection 12d'. The first projection 11d' and the second projection 12d' are aligned. When assembled, the first projection 11d' and the second projection 12d' abut each other, matching in shape and size, and are together located in the assembly section 3e of the second coil 3.
[0025] It is particularly worth noting that the highly coupled inductor 100c of the in Fig. The third embodiment of the present utility model shown in section 6, when assembled, has essentially the same appearance as the one shown in Fig. 3 Assembly view of the highly coupled inductor 100a of the first embodiment of the present utility model shown. [Advantageous effects of the exemplary embodiments]
[0026] The present utility model is characterized by high coupling, achieved by arranging several coils side by side, which allows for high power output, increased coupling efficiency and reduced stray inductance, and by reducing the volume of the entire inductor, which facilitates the assembly of small electronic devices.
Claims
[1] Highly coupled inductor (100a, 100b, 100c), comprising: - at least one primary magnetic core (1) having a receiving space (S) extending through it, - a first coil (2) which is removably arranged in the recording chamber (S), - at least one second coil (3) having a mounting section (3e) and being removably arranged in a space defined by the first coil (2), and - a secondary magnetic core (4) having a projection (11d', 12d') and being removably arranged in a space defined by the second coil (3), wherein the projection (11d', 12d') is removably arranged in the mounting section (3e), wherein the secondary magnetic core (4), the second coil (3) and the first coil (2) are arranged as a whole in the receiving space (S) of the primary magnetic core (1) in the assembled state. [2] High-coupled inductor (100a, 100b, 100c) according to claim 1, wherein the receiving space (S) is T-shaped, such that at least one side surface of the first coil (2) is exposed in the receiving space (S). [3] High-coupled inductor (100a, 100b, 100c) according to claim 1, wherein at least one side surface of the projection (11d', 12d') is exposed in the receiving space (S). [4] High-coupled inductor (100a, 100b, 100c) according to claim 1, wherein the first coil (2) has a gap (G) in which a part of the second coil (3) is arranged, wherein there is a space between the first coil (2) and the second coil (3). [5] High-coupled inductor (100a, 100b, 100c) according to claim 4, wherein part of the first coil (2) and part of the second coil (3) are arranged side by side. [6] High-coupled inductor (100a, 100b, 100c) according to claim 5, wherein the first coil (2) has several connecting sections (23). [7] High-coupled inductor (100a, 100b, 100c) according to claim 6, wherein the second coil (3) has several contact pads (31d, 32d). [8] High-coupled inductor (100a, 100b, 100c) according to claim 7, wherein the multiple connecting sections (23) and the multiple contact pads (31d, 32d) extend in opposite directions. [9] Highly coupled inductor (100a, 100b, 100c) according to claim 1, wherein the highly coupled inductor (100a, 100b, 100c) comprises two primary magnetic cores (1) which have the shape of a double-C or a double-E. [10] High-coupled inductor (100a, 100b, 100c) according to claim 1, wherein the primary magnetic core (1) is insulated from the first coil (2), the first coil (2) from the second coil (3) and the second coil (3) from the secondary magnetic core (4).