Highly coupled inductors
By designing a highly coupled inductor and employing a multi-coil parallel structure and insulation combination, the electromagnetic interference and surge current problems caused by leakage inductance are solved, enabling high-power and high-efficiency inductor applications suitable for small electronic devices.
Patent Information
- Application Number
- CN202522557344.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-02
AI Technical Summary
The leakage inductance in existing transformer/inductor assemblies leads to increased electromagnetic interference and surge current losses, making it difficult to meet the requirements of high-power and high-efficiency electronic equipment.
Design a high-coupling inductor by arranging multiple coils side by side and using a combination structure of a main iron core, a first coil, a second coil, and a secondary iron core to reduce leakage inductance and improve coupling efficiency. The coils are insulated or have gaps between them, and the main iron core can be a double C type or a double E type.
It achieves high coupling efficiency, provides high power and reduces leakage inductance, shrinks inductor size, and facilitates assembly in small electronic devices.
Smart Images
Figure CN224946635U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to an inductor, and more particularly to a high-coupling inductor that provides high power and reduces coil leakage inductance. Background Technology
[0002] In transformer / inductor applications, leakage inductance, along with the distributed capacitance in the circuit and the transformer coil, forms an oscillating circuit, causing oscillations and radiating electromagnetic energy, resulting in electromagnetic interference. Furthermore, during transmission, leakage inductance and distributed capacitance can cause inrush currents, increasing losses. Current trends in electronic device development focus on high power and high efficiency. Therefore, developing a transformer / inductor assembly that improves power and reduces coil leakage inductance to enhance the operating efficiency of electronic devices is crucial. Utility Model Content
[0003] The technical problem this invention aims to solve is to provide a high-coupling inductor to overcome the shortcomings of existing technologies. The advantages of this invention are: high coupling, multiple coils arranged side-by-side, which can provide high power, improve coupling efficiency, and reduce leakage inductance; and reduced overall inductor size, facilitating assembly in small electronic devices.
[0004] To achieve the above objectives, this utility model provides a high-coupling inductor, comprising: at least one main core having a through-space; a first coil detachably disposed within the through-space; at least one second coil having a mounting portion detachably disposed within the space defined by the first coil; and a secondary core having a protrusion detachably disposed within the space defined by the second coil, wherein the protrusion is detachably disposed within the mounting portion, and wherein the secondary core, the second coil, and the first coil are correspondingly disposed within the through-space of the main core to be assembled into a whole.
[0005] Furthermore, the receiving space is T-shaped, with at least one side of the first coil exposed outside the receiving space.
[0006] Furthermore, at least one side of the protrusion is exposed outside the accommodating space.
[0007] Furthermore, the first coil has a gap, a portion of the second coil is disposed in the gap, and there is a gap between the first coil and the second coil.
[0008] Furthermore, a portion of the first coil is arranged side by side with a portion of the second coil.
[0009] Furthermore, the first coil has multiple connecting parts.
[0010] Furthermore, the second coil has multiple contact pads.
[0011] Furthermore, multiple connecting parts and multiple contact pads extend in opposite directions.
[0012] Furthermore, the high-coupling inductor includes two main iron cores, which are either double C-type or double E-type.
[0013] Furthermore, the main iron core is insulated from the first coil, the first coil is insulated from the second coil, and the second coil is insulated from the secondary iron core.
[0014] One of the advantages of this invention is high coupling, with multiple coils arranged side by side, which can provide high power, improve coupling efficiency and reduce leakage inductance; another advantage of this invention is that it reduces the overall size of the inductor, which is beneficial for the assembly of small electronic devices.
[0015] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description
[0016] Figure 1 This is an exploded view of the high-coupling inductor according to the first embodiment of the present invention; Figure 2 This is a partially exploded view of the high-coupling inductor according to the first embodiment of the present invention; Figure 3 This is an assembly diagram of the high-coupling inductor according to the first embodiment of this utility model; Figure 4 for Figure 3 A schematic cross-sectional view of section IV-IV; Figure 5 This is an exploded view of the high-coupling inductor according to the second embodiment of the present invention; Figure 6 This is an exploded view of the high-coupling inductor according to the third embodiment of this utility model.
[0017] Explanation of reference numerals in the attached drawings: 100a, 100b, 100c, high-coupling inductors; 1, main core body; 11, first core body; 11a, first core main body; 11b, 11c, first extension; 11d, first middle part; 11d', first protrusion; 12, second core body; 12a, second core main body; 12b, 12c, second extension; 12d, second middle part; 12d', second protrusion; 2, first coil; 21, first part of the first coil; 21a, 21b, first vertical pin of the first coil; 21c, first crossbeam of the first coil; 22, second part of the first coil; 22a... 22b, Second vertical pin of the first coil; 22c, Second crossbeam of the first coil; 23, Connecting part; 3, Second coil; 3a, 3b, Vertical pin of the second coil; 3c, Crossbeam of the second coil; 3d, Contact pad of the second coil; 3e, Mounting part; 31, First part of the second coil; 31a, 31b, First vertical pin of the second coil; 31c, First crossbeam of the second coil; 31d, 32d, Contact pad; 32, Second part of the second coil; 32a, 32b, Second vertical pin of the second coil; 32c, Second crossbeam of the second coil; 4, Secondary core body; 41, Protrusion; S, Accommodation space; G, Gap. Detailed Implementation
[0018] The following specific embodiments illustrate the implementation of the "high-coupling inductor" disclosed in this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustrative purposes only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model. Additionally, the term "or" as used herein may include, depending on the actual situation, any combination of any one or more of the associated listed items.
[0019] [First Embodiment] Please see Figures 1 to 4 , Figure 1 This is an exploded view of the high-coupling inductor 100a according to the first embodiment of this utility model. Figure 2 This is a partially exploded schematic diagram of the high-coupling inductor 100a according to the first embodiment of this utility model. Figure 3 This is an assembly diagram of the high-coupling inductor 100a according to the first embodiment of this utility model. Figure 4 for Figure 3 A schematic cross-sectional view of section IV-IV. (See attached diagram.) Figure 1As shown, the high-coupling inductor 100a includes a main core 1, which has a through-space S, a first coil 2, at least one second coil 3, and a secondary core 4. The first coil 2 is detachably disposed within the through-space S. The at least one second coil 3 has a mounting portion and is detachably disposed within the space defined by the first coil 2. The secondary core 4 has a protrusion 41 and is detachably disposed within the space defined by the at least one second coil 3. The secondary core 4, the at least one second coil 3, and the first coil 2 are correspondingly disposed within the through-space S of the main core 1 to form a whole. In practical applications, the materials of the main core 1 and the secondary core 4 can be, but are not limited to, ferrite or other soft magnetic materials. In this embodiment, the main core 1 can be an integrally formed core, and the secondary core 4 can be a convex core; this invention is not limited to these limitations.
[0020] In this embodiment, the first coil 2 can be gate-shaped or Ω-shaped, with a gap G. Specifically, the first coil 2 consists of a first coil first part 21, a first coil second part 22, and a pair of connecting parts 23. The first coil first part 21 and the first coil second part 22 can be gate-shaped coils of similar size and shape. However, the first coil first part 21 and the first coil second part 22 are not abutted together; there is a gap between them, and the first coil first part 21 and the first coil second part 22 are connected as a whole by a pair of connecting parts 23.
[0021] The main iron core 1 is insulated from the first coil 2, the first coil 2 is insulated from the second coil 3, and the second coil 3 is insulated from the secondary iron core 4.
[0022] Further explanation: the first portion 21 of the first coil includes a pair of first vertical pins 21a and 21b and a first crossbeam 21c, the pair of first vertical pins 21a and 21b being connected by the first crossbeam 21c; the second portion 22 of the first coil includes a pair of second vertical pins 22a and 22b and a second crossbeam 22c, the pair of second vertical pins 22a and 22b being connected by the second crossbeam 22c. One connecting portion 23 connects the bottom of the first vertical pin 21a and the bottom of the second vertical pin 22a of the first coil, and another connecting portion 23 connects the bottom of the first vertical pin 21b and the bottom of the second vertical pin 22b of the first coil.
[0023] In this embodiment, the second coil 3 can be gate-shaped, having a pair of second coil vertical pins 3a and 3b and a second coil crossbeam 3c. The pair of second coil vertical pins 3a and 3b are perpendicular to the second coil crossbeam 3c and connected by the second coil crossbeam 3c. One end of each of the pair of second coil vertical pins 3a and 3b is connected to a second coil contact pad 3d.
[0024] To further explain, a pair of second coil vertical pins 3a and 3b are perpendicular to two second coil contact pads 3d, which extend toward each other from their respective connections to the pair of second coil vertical pins 3a and 3b. There is a space between the mutually facing ends of the two second coil contact pads 3d, which is defined as the mounting portion 3e.
[0025] Please see Figure 2 , Figure 2 This is a partially exploded view of the high-coupling inductor 100a according to the first embodiment of this utility model. Figure 2 It can be seen that the accommodating space S is a T-shaped space penetrating the main iron core 1. When assembling the high-coupling inductor 100a, the secondary iron core 4 is disposed in the space defined by the second coil 3, and the protrusion 41 of the secondary iron core 4 is disposed in the mounting portion 3e. A portion of the second coil 3 is disposed in the gap G of the first coil 2, and a portion of the first coil 2 and a portion of the second coil 3 are arranged side by side. 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 insulated from each other. It should be noted that if the first coil 2 and the second coil 3 are made or coated with insulating material, so that the first coil 2 and the second coil 3 are insulated from each other, then there may be no gap between the first coil 2 and the second coil 3.
[0026] When a portion of the second coil 3 is disposed in the gap G of the first coil 2, such that a portion of the first coil 2 and a portion of the second coil 3 are disposed side by side, the connecting portion 23 and the second coil contact pad 3d extend in opposite directions.
[0027] Please see Figure 3 and Figure 4 When the high-coupling inductor 100a is assembled as a whole, since the accommodating space S is T-shaped and penetrates the main iron core 1, at least one side of the first coil 2 and the second coil 3 are exposed outside the accommodating space S, and at least one side of the connecting part 23 is also exposed outside the accommodating space S.
[0028] [Second Embodiment] Please see Figure 5 , Figure 5 This is an exploded view of the second embodiment of the high-coupling inductor 100b of this utility model. The main core 1, first coil 2, second coil 3, and secondary core 4 shown in the second embodiment are respectively connected to… Figure 1 The main iron core 1, first coil 2, second coil 3, and secondary iron core 4 shown have roughly the same structure; the difference lies in... Figure 5 The number of second coils 3 shown is one or more (two are taken as an example). Depending on the application, the number of second coils 3 can be two, three, or four or more; this invention is not limited thereto. The assembly method of the above components is similar to... Figures 1 to 4 The assembly method of the high-coupling inductor 100a shown is roughly the same, and will not be described in detail here.
[0029] It should be noted that the second coil 3 of the high-coupling inductor 100b of this invention includes a first portion 31 and a second portion 32. The first portion 31 and the second portion 32 are similar in shape and size and have a gap between them. The first portion 31 has a pair of first vertical pins 31a and 31b and a first crossbeam 31c connecting them. Each end of the first vertical pins 31a and 31b has a contact pad 31d, which is perpendicular to the first vertical pins 31a and 31b and extends towards each other. The second portion 32 has a pair of second vertical pins 32a and 32b and a second crossbeam 32c connecting them. Each end of the second vertical pins 32a and 32b has a contact pad 32d, which is perpendicular to the second vertical pins 32a and 32b and extends towards each other.
[0030] Similarly, there is a space between the two contact pads 31d and a space between the two contact pads 32d. In the second embodiment, the two spaces are collectively defined as the mounting portion 3e.
[0031] Similarly, when assembling a high-coupling inductor 100b, the secondary core 4 is disposed in the space defined by the second coil 3, and the protrusion 41 of the secondary core 4 is disposed in the mounting portion 3e.
[0032] Similarly, the main iron core 1 is insulated from the first coil 2, the first coil 2 is insulated from the second coil 3, and the second coil 3 is insulated from the secondary iron core 4.
[0033] [Third Embodiment] Please see Figure 6 , Figure 6 This is an exploded view of the high-coupling inductor 100c according to the third embodiment of the present invention. Figure 6 The first coil 2 and the second coil 3 shown are respectively connected to Figure 1 The first coil 2 and the second coil 3 of the high-coupling inductor 100a shown in the first embodiment have essentially the same structure. Figure 6The first coil 2 and the second coil 3 shown will not be described in detail here. The difference between the high-coupling inductor 100c of this utility model and the high-coupling inductor 100a of the first embodiment and the high-coupling inductor 100b of the second embodiment is that... Figure 6 The main core 1 of the high-coupling inductor 100c shown is of double C type or double E type.
[0034] Specifically Figures 1 to 4 The main iron core 1 of the high-coupling inductor 100a shown in the first embodiment and Figure 5 The main core 1 of the high-coupling inductor 100b in the second embodiment is integrally formed and has a through-hole accommodating space S. Furthermore, the secondary core 4 of the high-coupling inductors 100a and 100b are independent and separate components from the main core 1. Unlike the high-coupling inductors 100a and 100b in the first and second embodiments, the main core 1 of the high-coupling inductor 100c in the third embodiment includes a first core 11 and a second core 12, which can be symmetrical E-type cores.
[0035] To further explain, the first core body 11 has a first core body 11a, a pair of first extensions 11b and 11c, and a first middle portion 11d. The pair of first extensions 11b and 11c and the first middle portion 11d define a groove on the first core body 11a. The second core body 12 has a second core body 12a, a pair of second extensions 12b and 12c, and a second middle portion 12d. The pair of second extensions 12b and 12c and the second middle portion 12d define a groove on the second core body 12a.
[0036] To further explain, since the first core body 11 and the second core body 12 are symmetrically arranged, a pair of first extensions 11b and 11c extend perpendicularly to the first core body 11 and toward the second core body 12, and a pair of second extensions 12b and 12c extend perpendicularly to the second core body 12 and toward the first core body 11. The first extension 11b and the second extension 12b correspond to each other and extend toward each other; the first extension 11c and the second extension 12c correspond to each other and extend toward each other. The first middle portion 11d and the second middle portion 12d correspond to each other. During assembly, the first core body 11 and the second core body 12 are joined together, the first extension 11b and the second extension 12b abut against each other, the first extension 11c and the second extension 12c abut against each other, a portion of the first coil first part 21 is disposed in the groove defined by the pair of first extensions 11b, 11c and the first middle part 11d on the first core body 11a, and a portion of the first coil second part 22 is disposed in the groove defined by the pair of second extensions 12b, 12c and the second middle part 12d on the second core body 12a.
[0037] The first middle section 11d and the second middle section 12d are similar Figures 1 to 4 The secondary core 4 of the high-coupling inductor 100a shown in the first embodiment and Figure 5 The second embodiment of the high-coupling inductor 100b has a secondary core 4. Specifically, during assembly, the first middle portion 11d and the second middle portion 12d can abut against each other and combine to form a structure similar to... Figures 1 to 4 The high-coupling inductor 100a shown and Figure 5 The secondary core 4 of the high-coupling inductor 100b shown is disposed in the space defined by the first coil 2.
[0038] It should be noted that the first middle portion 11d has a first protrusion 11d', and the second middle portion 12d has a second protrusion 12d'. The first protrusion 11d' and the second protrusion 12d' correspond to each other. During assembly, the first protrusion 11d' and the second protrusion 12d' abut against each other and are matched in shape and size, and are together disposed in the mounting portion 3e of the second coil 3.
[0039] It should be noted that, Figure 6 The high-coupling inductor 100c of the third embodiment of this utility model shown in the figure, when assembled, has an appearance similar to... Figure 3 The assembly diagram of the high-coupling inductor 100a of the first embodiment of this utility model shown is generally the same.
[0040] [Beneficial Effects of the Examples] One of the advantages of this invention is that it provides high coupling, with multiple coils arranged side by side, which can provide high power, improve coupling efficiency and reduce leakage inductance; and it reduces the overall size of the inductor, which is beneficial for the assembly of small electronic devices.
[0041] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of protection of the claims of the present utility model. Therefore, all equivalent technical changes made based on the content of the present utility model specification and drawings are included in the scope of protection of the claims of the present utility model.
Claims
1. A highly coupled inductor, characterized in that, The high-coupling inductor includes: At least one main iron core, the main iron core having a through-hole accommodating space therethrough; A first coil, which is detachably disposed within the accommodating space; At least one second coil having a mounting portion, the second coil being detachably disposed within the space defined by the first coil; and The secondary core has a protrusion and is detachably disposed within the space defined by the second coil. The protrusion is detachably disposed on the mounting portion. The secondary core, the second coil, and the first coil are respectively disposed within the accommodating space of the main core to be assembled into a whole.
2. The high-coupling inductor according to claim 1, characterized in that, The accommodating space is T-shaped, with at least one side of the first coil exposed outside the accommodating space.
3. The high-coupling inductor according to claim 1, characterized in that, At least one side of the protrusion is exposed outside the accommodating space.
4. The high-coupling inductor according to claim 1, characterized in that, The first coil has a gap, and a portion of the second coil is disposed within the gap. There is a gap between the first coil and the second coil.
5. The high-coupling inductor according to claim 4, characterized in that, A portion of the first coil is arranged side by side with a portion of the second coil.
6. The high-coupling inductor according to claim 5, characterized in that, The first coil has multiple connection parts.
7. The high-coupling inductor according to claim 6, characterized in that, The second coil has multiple contact pads.
8. The high-coupling inductor according to claim 7, characterized in that, The plurality of connecting portions and the plurality of contact pads extend in opposite directions.
9. The high-coupling inductor according to claim 1, characterized in that, The high-coupling inductor includes two main iron cores, which are either double C-type or double E-type.
10. The high-coupling inductor according to claim 1, characterized in that, The main iron core is insulated from the first coil, the first coil is insulated from the second coil, and the second coil is insulated from the secondary iron core.