Vertical winding common mode inductor with adjustable leakage inductance

Abstract

The utility model discloses a vertical winding common mode inductor with adjustable leakage inductance, which comprises a bottom plate and pins uniformly and fixedly connected to the lower end of the bottom plate, and coils are uniformly wound at the left end and the right end of a magnetic ring on the upper side of the bottom plate; the pin is provided with a protection assembly having a protection effect. The protection assembly comprises a protection box, a storage groove, a first connecting block and a second connecting block. Mounting blocks are fixedly connected to the lower ends of the magnetic rings, the mounting blocks are connected into mounting grooves in a clamped mode, and the mounting grooves are formed in the upper end of the bottom plate in a bilateral symmetry mode; a second magnetic column is connected to the middle position of the upper end of the magnetic ring in a clamped mode, the position of the second magnetic column corresponds to the position of the first magnetic column in an up-down mode, and a connecting block is connected to the front lower end of the second magnetic column in an embedded mode. According to the vertically-wound common-mode inductor with the adjustable leakage inductance, the magnetic ring and the coil can be replaced conveniently, the leakage inductance can be adjusted, and meanwhile the pins can be protected conveniently.

Description

Technical Field

[0001] This utility model relates to the field of vertically wound common-mode inductors, specifically a vertically wound common-mode inductor with adjustable leakage inductance. Background Technology

[0002] Common-mode inductors effectively suppress electromagnetic interference generated by power electronic devices in power conversion and control circuits. Therefore, vertically wound common-mode inductors play a crucial role. Currently, there are many styles of vertically wound common-mode inductors on the market to meet different needs.

[0003] For example, the utility model patent with authorization announcement number CN213716652U discloses a plug-in vertically wound common-mode inductor for photovoltaic inverters, comprising: a base plate, a magnetic ring, and several pins. The magnetic ring is disposed on the base plate, and winding portions are symmetrically arranged on both sides of the magnetic ring. A coil is sleeved on the winding portion, and the pins are inserted into the base plate and electrically connected to the coil. This utility model has a simple and compact structure and can be applied to current photovoltaic inverter circuits.

[0004] Based on existing solutions and actual production and processing, current vertically wound common-mode inductors with adjustable leakage inductance still have some problems, such as: the magnetic ring is fixedly connected to the base plate, which means that when the magnetic ring or coil is damaged, the whole unit needs to be replaced, resulting in a waste of resources; moreover, the fixed distance between the magnetic posts makes it inconvenient to adjust the leakage inductance; and the pins are directly exposed to the outside, making them easy to be bumped and damaged. Therefore, we propose a vertically wound common-mode inductor with adjustable leakage inductance to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide a vertically wound common-mode inductor with adjustable leakage inductance, in order to solve the problems mentioned in the background art, such as the inconvenience of replacing the magnetic ring and coil, the difficulty in adjusting the leakage inductance, and the inconvenience of protecting the pins.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a vertically wound common-mode inductor with adjustable leakage inductance, comprising a base plate and pins uniformly fixedly connected to its lower end, wherein a magnetic ring is provided on the upper side of the base plate, and coils are uniformly wound on the left and right ends of the magnetic ring.

[0007] Also includes:

[0008] The pins are equipped with protective components that provide protection.

[0009] The lower end of the magnetic ring is fixedly connected to a mounting block, and the mounting block is engaged with the inside of the mounting groove, and the mounting groove is symmetrically opened on the left and right sides inside the upper end of the base plate.

[0010] The upper middle position of the magnetic ring is engaged with a second magnetic post, and the position of the second magnetic post corresponds vertically to the position of the first magnetic post. Furthermore, a connecting block is embedded in the lower front end of the second magnetic post.

[0011] Preferably, the protective component includes a protective box, a storage slot, a first connecting block, and a second connecting block. The protective box is placed at the bottom of the base plate, and a storage slot is provided inside the upper end of the protective box. The front and rear ends of the protective box are symmetrically inlaid with the first connecting block, and the upper end of the first connecting block is magnetically connected to the lower end of the second connecting block.

[0012] Preferably, the storage slot is nested on the plug, and the second connecting block on the upper side of the plug is respectively embedded and connected to the front and rear ends of the base plate.

[0013] Preferably, the mounting block has connecting grooves at both its front and rear ends, and a spring is fixedly connected inside the connecting groove, wherein a limit block is fixedly connected to the front end of the spring.

[0014] Preferably, the limiting block is slidably connected inside the connecting groove, and the front end of the limiting block is engaged with the inside of the limiting hole, while the limiting hole is opened on the front and rear walls of the base plate.

[0015] Preferably, the sum of the thickness of the limiting block and the minimum extension length of the spring is equal to the depth of the connecting groove.

[0016] Preferably, the front end of the connecting block is internally threaded with a threaded rod, and the lower end of the threaded rod is rotatably connected to the middle position of the upper front end of the base plate.

[0017] Preferably, the second magnetic column has a lifting structure on the upper side of the first magnetic column via a threaded rod and a connecting block.

[0018] Compared with the prior art, the beneficial effects of this utility model are: the adjustable leakage inductance vertical winding common mode inductor makes it easy to replace the magnetic ring and coil, and the leakage inductance is adjustable, while also facilitating the protection of the pins;

[0019] 1. It is equipped with an installation block and an installation groove. The sum of the thickness of the limiting block and the minimum extension length of the spring is equal to the depth of the connecting groove, so that the limiting block retracts inside the connecting groove.

[0020] Pull the mounting block to detach it from the mounting slot, making it easier to replace the magnetic ring and coil;

[0021] 2. It is equipped with a first magnetic post and a second magnetic post. The second magnetic post is designed with a threaded rod and a connecting block on the upper side of the first magnetic post. When the threaded rod rotates, it drives the second magnetic post to rise and fall through the connecting block, thereby adjusting the distance between the second magnetic post and the first magnetic post, so that the leakage inductance can be adjusted.

[0022] 3. It is equipped with a base plate and protective components. The upper end of the first connecting block is magnetically connected to the lower end of the second connecting block, so that the protective box is placed at the lower end of the base plate.

[0023] The evenly spaced pins are nested inside the corresponding storage slots, and the position of the protective box is defined by the first and second connecting blocks, thus facilitating the protection of the pins. Attached Figure Description

[0024] Figure 1 This is a frontal cross-sectional view of the present invention.

[0025] Figure 2 This is a schematic diagram of the right-side cross-sectional structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the right-side cross-sectional structure of the connection between the spring and the limiting block in this utility model;

[0027] Figure 4 This is a top cross-sectional view of the connection between the magnetic ring and the second magnetic post of this utility model.

[0028] Figure 5 This is a schematic diagram of the overall structure of the protective box and the first connecting block plate of this utility model;

[0029] Figure 6 This is a schematic diagram of the overall structure of the connection between the threaded rod and the connecting block of this utility model.

[0030] In the diagram: 1. Base plate; 2. Pin; 3. Magnetic ring; 4. Coil; 5. Protective assembly; 501. Protective box; 502. Storage slot; 503. First connecting block; 504. Second connecting block; 6. Mounting block; 7. Mounting slot; 8. Connecting slot; 9. Spring; 10. Limiting block; 11. Limiting hole; 12. First magnetic post; 13. Second magnetic post; 14. Connecting block; 15. Threaded rod. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figure 1-6This utility model provides a technical solution: a vertically wound common-mode inductor with adjustable leakage inductance, including a base plate 1, a pin 2, a magnetic ring 3, a coil 4, a protective component 5, a mounting block 6, a mounting groove 7, a connecting groove 8, a spring 9, a limiting block 10, a limiting hole 11, a first magnetic post 12, a second magnetic post 13, a connecting block 14, and a threaded rod 15.

[0033] Example: Existing magnetic rings are fixedly connected to the base plate, which means that if the magnetic ring or coil is damaged, the entire unit needs to be replaced, resulting in wasted resources. Therefore, this example uses the following technical solution: Figure 1 , Figure 3 and Figure 4 Since the mounting groove 7 is symmetrically opened on the upper part of the base plate 1, the front and rear ends of the mounting block 6 are provided with connecting grooves 8, the front end of the limiting block 10 is engaged with the inside of the limiting hole 11, and the sum of the thickness of the limiting block 10 and the minimum extension length of the spring 9 is equal to the depth of the connecting groove 8.

[0034] Therefore, when replacement is needed, press the limiting block 10 inward to slide the limiting block 10 inward, so that the spring 9 is contracted to the minimum state until the limiting block 10 enters the interior of the connecting groove 8, and pull the magnetic ring 3 upward until the mounting blocks 6, which are symmetrically arranged on the left and right, are disengaged from the mounting groove 7 at the corresponding position.

[0035] Take out the new one and let the mounting block 6 engage in the mounting groove 7 at the corresponding position. This allows the spring 9 to drive the limiting block 10 to slide outward inside the connecting groove 8 until the outer end of the limiting block 10 engages in the limiting hole 11 at the corresponding position. The limiting block 10 and the limiting hole 11 limit the position of the magnetic ring 3 on the base plate 1, thereby facilitating the replacement of the magnetic ring 3 and the coil 4.

[0036] The existing fixed distance between magnetic pillars makes leakage inductance adjustment inconvenient. Therefore, this embodiment addresses this issue by implementing the following technical solution: Figure 1 , Figure 2 , Figure 4 and Figure 6 Since the second magnetic post 13 is engaged and connected at the middle position of the upper end of the magnetic ring 3, and the threaded rod 15 is threadedly connected to the front end of the connecting block 14, the second magnetic post 13 has a lifting structure on the upper side of the first magnetic post 12 through the threaded rod 15 and the connecting block 14.

[0037] Therefore, when the leakage inductance is adjustable, the second magnetic post 13 is engaged with the magnetic ring 3, so that when the threaded rod 15 rotates, the connecting block 14 moves up and down on the threaded rod 15.

[0038] The second magnetic post 13 is driven to slide up and down on the upper end of the magnetic ring 3 by the connecting block 14, thereby adjusting the distance between the lower end of the second magnetic post 13 and the upper end of the first magnetic post 12, so that the leakage inductance can be adjusted.

[0039] The existing pins are directly exposed to the outside, making them susceptible to damage from contact. Therefore, this embodiment addresses this issue by employing the following technical solution: Figure 1 , Figure 2 and Figure 5 Since the storage slot 502 is nested on the pin 2, the upper end of the first connecting block 503 is magnetically connected to the lower end of the second connecting block 504.

[0040] Therefore, in order to prevent damage to the pins 2 when not in use, the pins 2 need to be protected. The protective box 501 is placed at the lower end of the base plate 1, so that the evenly arranged pins 2 are nested and connected to the inside of the corresponding storage slots 502, and the evenly arranged first connecting blocks 503 are magnetically connected to the lower end of the corresponding second connecting blocks 504.

[0041] The first connecting block 503 and the second connecting block 504 limit the position of the protective box 501 at the lower end of the base plate 1, so that the storage slot 502 protects the plug 2, thereby facilitating the protection of the plug 2. All the electrical components mentioned above are existing technologies and will not be described in detail here.

[0042] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vertically wound common-mode inductor with adjustable leakage inductance, comprising a base plate (1) and pins (2) uniformly fixedly connected to its lower end, wherein a coil (4) is uniformly wound on the left and right ends of a magnetic ring (3) provided on the upper side of the base plate (1). characterized in that Also includes: The pin (2) is provided with a protective component (5) for protection; The lower end of the magnetic ring (3) is fixedly connected to the mounting block (6), and the mounting block (6) is engaged with the inside of the mounting groove (7), and the mounting groove (7) is symmetrically opened on the left and right sides inside the upper end of the base plate (1). The upper middle position of the magnetic ring (3) is engaged with a second magnetic post (13), and the position of the second magnetic post (13) corresponds vertically to the position of the first magnetic post (12). The lower front end of the second magnetic post (13) is inlaid with a connecting block (14).

2. The vertically wound common-mode inductor with adjustable leakage inductance according to claim 1, characterized in that: The protective component (5) includes a protective box (501), a storage slot (502), a first connecting block (503), and a second connecting block (504). The protective box (501) is placed at the bottom of the base plate (1), and the storage slot (502) is provided inside the upper end of the protective box (501). The first connecting block (503) is symmetrically embedded and connected to both the front and rear ends of the protective box (501), and the upper end of the first connecting block (503) is magnetically connected to the lower end of the second connecting block (504).

3. A vertically wound common-mode inductor with adjustable leakage inductance according to claim 2, characterized in that: The storage slot (502) is nested on the pin (2), and the second connecting block (504) on the upper side of the pin (2) is respectively embedded and connected to the front and rear ends of the base plate (1).

4. A vertically wound common-mode inductor with adjustable leakage inductance according to claim 1, characterized in that: The mounting block (6) has connecting grooves (8) at both the front and rear ends, and a spring (9) is fixedly connected inside the connecting groove (8), wherein a limit block (10) is fixedly connected to the front end of the spring (9).

5. A vertically wound common-mode inductor with adjustable leakage inductance according to claim 4, characterized in that: The limiting block (10) is slidably connected inside the connecting groove (8), and the front end of the limiting block (10) is engaged inside the limiting hole (11), while the limiting hole (11) is opened on the front and rear walls of the base plate (1).

6. A vertically wound common-mode inductor with adjustable leakage inductance according to claim 5, characterized in that: The sum of the thickness of the limiting block (10) and the minimum extension length of the spring (9) is equal to the depth of the connecting groove (8).

7. A vertically wound common-mode inductor with adjustable leakage inductance according to claim 1, characterized in that: The front end of the connecting block (14) is internally threaded with a threaded rod (15), and the lower end of the threaded rod (15) is rotatably connected to the middle position of the upper front end of the base plate (1).

8. A vertically wound common-mode inductor with adjustable leakage inductance according to claim 1, characterized in that: The second magnetic column (13) is in a lifting structure above the first magnetic column (12) via a threaded rod (15) and a connecting block (14).

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