An integrated coupled inductor
By using a stacked core and core cover structure, combined with a spindle and bump design, the problems of large size of coupled inductors and coil interference are solved, achieving miniaturized and high-quality inductor design, and eliminating power loss and signal crosstalk.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUACUI PIM MICRO INDUCTANCE ELECTRONIC(JIANGSU) CO LTD
- Filing Date
- 2025-05-07
- Publication Date
- 2026-05-26
Smart Images
Figure CN224287947U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of inductor technology, and in particular to an integrated coupled inductor. Background Technology
[0002] In the field of modern electronics, the demand for high performance, miniaturization, and high reliability in various electronic devices and systems continues to grow. Coupled inductors, as a key electronic component, play a crucial role in numerous circuit applications, such as switching power supplies, signal processing circuits, and wireless communication devices.
[0003] In the prior art, coupled inductors require two or more inductors to be interconnected through a common magnetic flux. However, this type of coupled inductor has the following drawbacks: First, the combination of multiple inductors increases the size of the coupled inductor, which contradicts the trend of miniaturization in electronic devices; second, interference can occur between the coils of multiple inductors, resulting in additional power loss and signal crosstalk in the coupled inductor. Utility Model Content
[0004] To overcome the shortcomings of the prior art, this application provides an integrated coupled inductor.
[0005] The integrated coupled inductor provided in this application adopts the following technical solution:
[0006] An integrated coupled inductor includes a first iron core, a second iron core, and a core cover stacked together. A first coil is disposed between the first iron core and the second iron core, and a second coil is disposed between the second iron core and the core cover.
[0007] By adopting the above technical solution, the stacked first iron core, second iron core and core cover can be combined into an integral structure, effectively reducing the volume of the coupled inductor; at the same time, the first coil and the second coil are respectively set on both sides of the second iron core, which can effectively eliminate the interference between the first coil and the second coil and prevent the coupled inductor from having additional power loss and signal crosstalk.
[0008] In one specific implementation, the integrated coupled inductor further includes a spindle, which passes through the second iron core and has its two ends connected to the first iron core and the core cover, respectively. The first coil and the second coil are wound around the two ends of the spindle.
[0009] By adopting the above technical solution, the first coil and the second coil can be wound around the two ends of the mandrel, which effectively improves the winding strength of the first coil and the second coil.
[0010] In one specific implementation, a first cavity is provided between the first iron core and the second iron core, and a second cavity is provided between the second iron core and the core cover. The mandrel is sequentially inserted into the first cavity and the second cavity, the first coil is housed in the first cavity, and the second coil is housed in the second cavity.
[0011] In one specific implementation, the first iron core, the second iron core, the core cover, and the mandrel are integrally formed.
[0012] By adopting the above technical solution, the integrally formed first iron core, second iron core, core cover and core shaft can further reduce the volume of the inductor, so that the integrally coupled inductor can better meet the miniaturization installation requirements of electronic devices.
[0013] In one specific implementation scheme, the peripheral side of the first iron core has two first wire openings and two second wire openings, and the first coil has two first ends, which are respectively inserted into the two first wire openings.
[0014] By adopting the above technical solution, the two first ends can be easily passed through the first iron core through the two first wire ports to form electrodes.
[0015] In one specific implementation, the second iron core is provided with two first protrusions on one side near the first iron core, and the two first protrusions are respectively housed in the two first wire openings, with each of the first ends passing through the corresponding first protrusion.
[0016] By adopting the above technical solution, the first protrusion housed in the two first wire openings can cover the first end to increase the magnetic field strength of the first coil, thereby improving the quality of the inductance.
[0017] In one specific implementation scheme, two third wire ports are provided at one end of the second iron core. The two third wire ports are respectively aligned with the two second wire ports. The aligned second wire ports and the third wire ports are combined to form a wire port group. The second coil has two second ends, which are respectively inserted into the two wire port groups.
[0018] By adopting the above technical solution, the two second ends can be easily passed through the second iron core and the first iron core through the two wire ports to form electrodes.
[0019] In one specific implementation, the core cover is provided with two second protrusions on the side near the second iron core. The two second protrusions are respectively housed in the two wire port groups, and each of the second ends passes through the corresponding second protrusion.
[0020] By adopting the above technical solution, the second protrusion housed in the two wire ports can cover the second end, thereby increasing the magnetic field strength of the second coil and improving the quality of the inductance.
[0021] In summary, this application includes at least one of the following beneficial technical effects:
[0022] 1. The stacked first iron core, second iron core and core cover can be combined into an integral structure, effectively reducing the volume of the coupled inductor;
[0023] 2. The first coil and the second coil are respectively located on both sides of the second iron core, which can effectively eliminate the interference between the first coil and the second coil and prevent additional power loss and signal crosstalk from the coupled inductor. Attached Figure Description
[0024] Figure 1 This is a three-dimensional structural diagram of the integrated coupled inductor in an embodiment of this application with the core cover facing upwards.
[0025] Figure 2 yes Figure 1 An explosion diagram.
[0026] Figure 3 This is a three-dimensional structural diagram of the integrated coupled inductor in an embodiment of this application with the first iron core facing upwards.
[0027] Explanation of reference numerals in the attached figures:
[0028] 1. First iron core; 2. Second iron core; 3. Core cover; 4. First coil; 41. First end; 5. Second coil; 51. Second end; 6. Core shaft; 7. First wire opening; 8. Second wire opening; 9. First protrusion; 10. Third wire opening; 11. Second protrusion; 12. Electroplating layer. Detailed Implementation
[0029] The present application will be further described in detail below with reference to the accompanying drawings.
[0030] See Figure 1-3 As shown, an integrated coupled inductor includes a first iron core 1, a second iron core 2 and a core cover 3 stacked together. A spindle 6 is provided on the first iron core 1. The spindle 6 passes through the second iron core 2 and is connected to the core cover 3. A first coil 4 is wound on the spindle 6 between the first iron core 1 and the second iron core 2. A second coil 5 is wound on the spindle 6 between the second iron core 2 and the core cover 3.
[0031] In this way, the stacked first iron core 1, second iron core 2, core cover 3 and core shaft 6 can be combined into an integral structure, effectively reducing the volume of the coupled inductor; at the same time, the first coil 4 and the second coil 5 are respectively set on both sides of the second iron core 2, which can effectively eliminate the interference between the first coil 4 and the second coil 5, and prevent the coupled inductor from having additional power loss and signal crosstalk.
[0032] Specifically, the first iron core 1 and the mandrel 6 are an integral structure formed by cold pressing iron powder. The first coil 4 is wound onto the mandrel 6 by a winding machine. The second iron core 2 is an integral structure formed by cold pressing iron powder onto the first iron core 1 to cover the first coil 4. The mandrel 6 extends through the second iron core 2. The second coil 5 is wound onto the upper end of the mandrel 6 by a winding machine. The core cover 3 is an integral structure formed by hot pressing iron powder onto the second iron core 2 to cover the second coil 5. The specific cold pressing process, hot pressing process, and winding machine are existing technologies and will not be described in detail here. The first iron core 1, the second iron core 2, the core cover 3, and the mandrel 6 are an integral die-cast structure. The integral structure of the coupled inductor can effectively reduce the inductor volume to better meet the miniaturization installation requirements of electronic devices.
[0033] In this embodiment, the second iron core 2 has a first cavity for accommodating the first coil 4, and the core cover 3 has a second cavity for accommodating the second coil 5. The core shaft 6 is sequentially inserted into the first cavity and the second cavity. The first cavity is formed by cold pressing the second iron core 2 and matches the outer contour of the first coil 4; the second cavity is formed by hot pressing the core cover 3 and matches the outer contour of the second coil 5.
[0034] In this embodiment, the first iron core 1 is rectangular, and two first wire openings 7 and two second wire openings 8 are opened at the four ends of its periphery. The two first wire openings 7 and the two second wire openings 8 are formed simultaneously during the cold pressing of the first iron core 1. The first coil 4 has two first ends 41, which are respectively inserted into the two first wire openings 7.
[0035] Furthermore, the second iron core 2 is rectangular, and two first protrusions 9 are provided on the side of the second iron core 2 near the first iron core 1. The two first protrusions 9 are located at one end of the second iron core 2 and are respectively housed in two first wire openings 7. Each first end 41 is respectively inserted into the corresponding first protrusion 9. The first protrusions 9 are simultaneously die-cast into the first wire openings 7 during the cold pressing of the second iron core 2, and can effectively cover the first end 41 in the first wire openings 7.
[0036] In this way, the two first ends 41 can pass through the two first wire openings 7 to the first iron core 1 and form electrodes, while the first protrusion 9 housed in the two first wire openings 7 can cover the first ends 41 to increase the magnetic field strength of the first coil 4, thereby improving the quality of the inductance.
[0037] In this embodiment, two third wire openings 10 are provided at one end of the second iron core 2. The two third wire openings 10 are formed simultaneously during the cold pressing process of the second iron core 2. The two third wire openings 10 are respectively aligned with two second wire openings 8. The aligned second wire openings 8 and third wire openings 10 are combined to form a wire opening group. The second coil 5 has two second ends 51, which are respectively inserted into the two wire opening groups.
[0038] Furthermore, the core cover 3 is rectangular, and two second protrusions 11 are provided on the side of the core cover 3 near the second iron core 2. The two second protrusions 11 are located at one end of the core cover 3 and are respectively housed in two wire opening groups. Each second end 51 is respectively inserted into the corresponding second protrusion 11. The second protrusions 11 are simultaneously die-cast into the wire opening groups during the hot pressing of the core cover 3, and can effectively cover the second end 51 in the wire opening groups.
[0039] In this way, the two second ends 51 can easily pass through the two wire ports to the second iron core 2 and the first iron core 1 and form electrodes. The second protrusion 11 housed in the two wire ports can cover the second ends 51 to increase the magnetic field strength of the second coil 5, thereby improving the quality of the inductance.
[0040] In this embodiment, the peripheral sides of the integrally formed first iron core 1, second iron core 2, and core cover 3 are also covered with insulating varnish. The two first ends 41 and the two second ends 51 are attached to the first iron core 1, and the electrodes formed by the two have peelable surfaces for removing the insulating varnish. The peelable surfaces have an electroplated layer 12. The specific insulating varnish and electroplated layer 12 are prior art and will not be described in detail here.
[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. An integrated coupled inductor, characterized in that: It includes a first iron core (1), a second iron core (2) and a core cover (3) stacked together. A first coil (4) is disposed between the first iron core (1) and the second iron core (2), and a second coil (5) is disposed between the second iron core (2) and the core cover (3).
2. The integrated coupled inductor according to claim 1, characterized in that: The integrated coupled inductor also includes a spindle (6), which is inserted into the second iron core (2) and its two ends are respectively connected to the first iron core (1) and the core cover (3). The first coil (4) and the second coil (5) are respectively wound around the two ends of the spindle (6).
3. The integrated coupled inductor according to claim 2, characterized in that: There is a first cavity between the first iron core (1) and the second iron core (2), and a second cavity between the second iron core (2) and the core cover (3). The core shaft (6) is sequentially inserted into the first cavity and the second cavity. The first coil (4) is housed in the first cavity, and the second coil (5) is housed in the second cavity.
4. The integrated coupled inductor according to claim 2, characterized in that: The first iron core (1), the second iron core (2), the core cover (3) and the core shaft (6) are integrally formed.
5. An integrated coupled inductor according to any one of claims 1-4, characterized in that: The first iron core (1) has two first wire openings (7) and two second wire openings (8) on its periphery. The first coil (4) has two first ends (41), which are respectively inserted into the two first wire openings (7).
6. The integrated coupled inductor according to claim 5, characterized in that: The second iron core (2) has two first protrusions (9) on one side near the first iron core (1). The two first protrusions (9) are respectively housed in the two first wire openings (7), and each of the first ends (41) passes through the corresponding first protrusion (9).
7. The integrated coupled inductor according to claim 5, characterized in that: Two third wire ports (10) are provided at one end of the second iron core (2). The two third wire ports (10) are respectively aligned with the two second wire ports (8). The aligned second wire ports (8) and the third wire ports (10) are combined to form a wire port group. The second coil (5) has two second ends (51). The two second ends (51) are respectively inserted into the two wire port groups.
8. The integrated coupled inductor according to claim 7, characterized in that: The core cover (3) has two second protrusions (11) on one side near the second iron core (2). The two second protrusions (11) are respectively housed in the two wire opening groups, and each of the second ends (51) passes through the corresponding second protrusion (11).