Filter inductor

Abstract

The utility model provides a filter inductor, relates to filter system field, including shell, magnetic core and copper bar, magnetic core includes at least two magnetic ring, the magnetic ring is sleeved distribution, copper bar passes through the through hole of magnetic ring that is located magnetic core middle part, the shell is provided with the fixed slot that the magnetic core is inserted, magnetic ring includes ferrite magnetic ring and nanocrystalline magnetic ring. The utility model provides a filter inductor. The ferrite magnetic ring and the nanocrystalline magnetic ring are arranged at the same time, so that the filtering use effect of the filter inductor in each frequency band is improved. And through sleeving between the magnetic rings, the occupied space is reduced, and the space utilization rate is improved.

Description

Technical Field

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

[0002] With the rapid development of the new energy vehicle industry, the demand for electric drive filtering systems is increasing rapidly. The market is demanding more and more miniaturized, lightweight, high-performance, and integrated products, and the requirements for inductor filtering in different frequency bands are becoming increasingly stringent. Currently, the magnetic rings of filtering systems all use a single-stage filtering inductor made of a single material. Therefore, to achieve good filtering effects in all frequency bands, multi-stage magnetic cores are required, resulting in a large footprint and low space utilization. Utility Model Content

[0003] This invention provides a filter inductor to address the problem of large space requirements in existing technologies.

[0004] According to the present invention, a filter inductor includes a housing, a magnetic core, and a copper busbar. The magnetic core includes at least two magnetic rings that are nested between each other. The copper busbar passes through a through hole in a magnetic ring located in the middle of the magnetic core. The housing is provided with a fixing groove for inserting the magnetic core. The magnetic rings include ferrite magnetic rings and nanocrystalline magnetic rings.

[0005] According to the present invention, a fixing member is connected between the fixing slot and the magnetic core, and the fixing member is used to fix the magnetic core to the fixing slot.

[0006] According to the present invention, the fixing component is provided as a fixing adhesive.

[0007] According to the present invention, a first gap is provided between the ferrite magnetic ring and the side wall of the fixed groove.

[0008] According to the present invention, the width of the first gap is set to 0.5-0.7mm.

[0009] According to the present invention, a second gap is provided between the nanocrystalline magnetic ring and the sidewall of the fixed groove.

[0010] According to the present invention, the width of the second gap is set to 0.7-1mm.

[0011] According to the present invention, a filter inductor is provided in which a plurality of reinforcing protrusions are fixedly connected to the side wall of the fixing groove, and a fourth gap is provided between two adjacent reinforcing protrusions.

[0012] According to the present invention, a filter inductor is provided in which a support is fixedly connected in the fixed slot, and the support supports the magnetic core to detach from the bottom surface of the fixed slot.

[0013] According to the present invention, a filter inductor is provided, wherein the fixing slot includes a first slot for inserting the ferrite magnetic ring, a second slot for inserting the nanocrystalline magnetic ring, and a partition plate, wherein the partition plate is located between the first slot and the second slot.

[0014] This invention provides a filter inductor that, during high-frequency operation, utilizes a nanocrystalline magnetic ring for more efficient operation, reducing energy loss and heat generation. In low-frequency applications, a ferrite core provides higher permeability, which is beneficial for improving filter performance. By simultaneously incorporating both ferrite and nanocrystalline magnetic rings, the filtering effect of the inductor across various frequency bands is enhanced. The nested arrangement of the magnetic rings reduces space requirements and improves space utilization. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a filter inductor provided by this utility model when a ferrite magnetic ring and a nanocrystalline magnetic ring are fixedly connected.

[0017] Figure 2 This is a schematic diagram of the structure of the fixing groove of this utility model.

[0018] Figure 3 This is a schematic diagram showing the positional relationship between the ferrite magnetic ring and the nanocrystalline magnetic ring and the fixing groove when they are fixedly connected.

[0019] Figure 4 This is a schematic diagram of the structure of a filter inductor provided by this utility model when ferrite magnetic rings and nanocrystalline magnetic rings are respectively set.

[0020] Figure 5 This is a schematic diagram of the structure of the first and second tanks of this utility model.

[0021] Figure 6 This is a schematic diagram showing the positional relationship between the ferrite magnetic ring and the nanocrystalline magnetic ring of this utility model in the first and second grooves, respectively.

[0022] Figure label:

[0023] 1. Housing; 11. Fixing groove; 111. First groove; 112. Second groove; 113. Divider plate; 114. Glue outlet; 12. Reinforcing protrusion; 121. Fourth gap; 13. Support part; 2. Magnetic core; 21. Ferrite magnetic ring; 211. Boss; 22. Nanocrystalline magnetic ring; 3. Copper busbar; 4. First gap; 5. Second gap. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] The terms "first" and "second" in the specification and claims of this utility model may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "multiple" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] The following is combined Figures 1-6 This invention describes the filter inductor of this utility model.

[0028] The present invention provides a filter inductor comprising a housing 1, a magnetic core 2 and a copper busbar 3. The magnetic core 2 comprises at least two magnetic rings, which are nested and distributed between each other. The magnetic rings include ferrite magnetic rings 21 and nanocrystalline magnetic rings 22. The copper busbar 3 passes through the through holes of the magnetic rings located in the middle of the magnetic core 2. The housing 1 is provided with a fixing groove 11 for inserting the magnetic core 2.

[0029] In an alternative embodiment, such as Figure 1 As shown, two magnetic rings are provided: a ferrite magnetic ring 21 and a nanocrystalline magnetic ring 22, which are nested together. The two magnetic rings are inserted into the fixing groove 11 of the housing 1. A copper busbar 3 passes through the through hole of the magnetic ring located in the middle of the magnetic core 2, and is fixedly connected to the housing 1 by screws. Of course, more than two magnetic rings can be provided, with at least one ferrite magnetic ring 21 and one nanocrystalline magnetic ring 22.

[0030] Specifically, when the ferrite magnetic ring 21 and the nanocrystalline magnetic ring 22 are fixedly connected, in an optional embodiment, as shown in the figure, the nanocrystalline magnetic ring 22 is wrapped around the outside of the ferrite magnetic ring 21, thereby making the ferrite magnetic ring 21 and the nanocrystalline magnetic ring 22 tightly connected and reducing the vibration and collision between the ferrite magnetic ring 21 and the nanocrystalline magnetic ring 22.

[0031] In another alternative embodiment, the ferrite magnetic ring 21 is sleeved on the outside of the nanocrystalline magnetic ring 22, and the ferrite magnetic ring 21 and the nanocrystalline magnetic ring 22 are fixed by adhesive or strapping to reduce vibration and collision between the ferrite magnetic ring 21 and the nanocrystalline magnetic ring 22.

[0032] This invention provides a filter inductor. At high frequencies, the nanocrystalline magnetic ring 22 operates more efficiently, reducing energy loss and heat generation. In low-frequency applications, the ferrite core 2 provides higher permeability, which is beneficial for improving filter performance. By simultaneously incorporating the ferrite magnetic ring 21 and the nanocrystalline magnetic ring 22, the filtering effect of the filter inductor across various frequency bands is enhanced. The nested arrangement of the magnetic rings reduces space requirements and improves space utilization.

[0033] Furthermore, a fixing member is connected between the fixing groove 11 and the magnetic core 2, and the fixing member is used to fix the magnetic core 2 to the fixing groove 11. Specifically, in an optional embodiment, the fixing member is set as an elastic pad, and the elastic pad is engaged between the fixing groove 11 and the magnetic core 2 to clamp the magnetic core 2 in the fixing groove 11.

[0034] In another alternative embodiment, the fastener includes a fixing plate and a fixing pad fixedly connected to the end of the fixing plate. The fixing pad is fixedly connected to the port of the fixing groove 11, extends into the fixing groove 11 and presses against the magnetic core 2, and the fixing pad can be made of an elastic material.

[0035] In another optional embodiment, the fixing element is a fixing adhesive. Through a potting process, fixing adhesive is filled between the magnetic core 2 and the fixing groove 11, immersing the magnetic core 2. After the fixing adhesive cures, the magnetic core 2 is fixed. Simultaneously, the use of distributed ferrite magnetic rings 21 and nanocrystalline magnetic rings 22 can also reduce the amount of fixing adhesive used during potting, lowering production costs. Thermally conductive adhesive can be used as the fixing adhesive.

[0036] Specifically, such as Figure 2, Figure 5 As shown, multiple protrusions 211 are provided on the inner and outer sidewalls of the ferrite magnetic ring 21. The end of the protrusion 211 near the nanocrystalline magnetic ring 22 is flush with the outer wall surface of the nanocrystalline magnetic ring 22, increasing the stability of the connection between the ferrite magnetic ring 21 and the nanocrystalline magnetic ring 22. The protrusion 211 near the sidewall of the fixing groove 11 increases the adhesion between the ferrite core 2 and the fixing adhesive, thereby improving the stability of the fixation between the ferrite magnetic ring 21 and the fixing groove 11.

[0037] Furthermore, such as Figure 3 , Figure 6 As shown, a first gap 4 is provided between the ferrite magnetic ring 21 and the side wall of the fixing groove 11. The first gap 4 allows for the installation of a fixing component and also facilitates the insertion of the ferrite magnetic ring 21 into the fixing groove 11.

[0038] Furthermore, the width of the first gap 4 is set to 0.5-0.7mm. This facilitates the installation of the ferrite magnetic ring 21. Simultaneously, when fixing with adhesive, the adhesive fills the first gap 4, improving the stability of the ferrite magnetic ring 21's fixation. While meeting the performance requirements for fixing the ferrite magnetic ring 21, the size of the plastic shell itself is reduced, the amount of adhesive required is decreased, the drying time is shortened, and economic efficiency is improved.

[0039] Furthermore, such as Figure 3 , Figure 6 As shown, a second gap 5 is provided between the nanocrystalline magnetic ring 22 and the side wall of the fixing groove 11. The first gap 4 is for setting the fixing component, and also facilitates the insertion of the nanocrystalline magnetic ring 22 into the fixing groove 11.

[0040] Furthermore, the width of the second gap 5 is set to 0.7-1mm. This provides sufficient space for the insertion of the nanocrystalline magnetic ring 22, reducing the risk of collision between the nanocrystalline magnetic ring 22 and the side wall of the fixing groove 11 when it is inserted. Simultaneously, when fixing with adhesive, the adhesive fills the second gap 5, improving the stability of the nanocrystalline magnetic ring 22's fixation. While meeting the performance requirements for fixing the nanocrystalline magnetic ring 22, the size of the plastic shell itself is reduced, the amount of adhesive used is decreased, the drying time is shortened, and economic efficiency is improved.

[0041] Furthermore, multiple reinforcing protrusions 12 are fixedly connected to the side wall of the fixing groove 11, and a fourth gap 121 is provided between two adjacent reinforcing protrusions 12. Specifically, as shown in... Figure 2 , Figure 5 As shown, by fixing multiple reinforcing protrusions 12 to the side wall of the fixing groove 11, the inward shrinkage of the plastic shell after demolding and cooling at this location is improved. At the same time, the adhesion between the fixing adhesive and the plastic shell is increased, reducing the risk of delamination.

[0042] Furthermore, a support portion 13 is fixedly connected within the fixing groove 11, and the support portion 13 supports the magnetic core 2 to detach from the bottom surface of the fixing groove 11. Specifically, in an optional embodiment, such as Figure 2 , Figure 5 As shown, multiple support portions 13 are provided at the bottom of the fixing groove 11. The support portions 13 are curved, but they can also be straight or broken. When the magnetic core 2 is placed in the fixing groove 11, the bottom of the magnetic core 2 contacts the top of the support portion 13, thereby detaching the bottom of the magnetic core 2 from the ground of the fixing groove 11. Fixing adhesive is filled between the magnetic core 2 and the bottom surface of the fixing groove 11, improving the stability of the connection between the magnetic core 2 and the bottom surface of the fixing groove 11.

[0043] In another alternative embodiment, the support portion 13 protrudes from the side wall of the fixing groove 11 and is higher than the bottom surface of the fixing groove 11, and the bottom of the magnetic core 2 contacts the top of the support portion 13, thereby causing the bottom of the magnetic core 2 to detach from the ground of the fixing groove 11.

[0044] In an alternative embodiment, such as Figure 4 , Figure 5 As shown. The fixing groove 11 includes a first groove 111 for inserting a ferrite magnetic ring 21, a second groove 112 for inserting a nanocrystalline magnetic ring 22, and a partition plate 113, which is located between the first groove 111 and the second groove 112.

[0045] Specifically, when the ferrite magnetic ring 21 and the nanocrystalline magnetic ring 22 are respectively provided, the positioning grooves are set as a first groove 111 for inserting the ferrite magnetic ring 21 and a second groove 112 for inserting the nanocrystalline magnetic ring 22. For example... Figure 5 , Figure 6 As shown, one ferrite magnetic ring 21 and one nanocrystalline magnetic ring 22 are each provided. The first groove 111 corresponds to the ferrite ring, and the second groove 112 corresponds to the nanocrystalline magnetic ring 22. In this embodiment, the ferrite magnetic ring 21 is sleeved on the outside of the nanocrystalline magnetic ring 22. Of course, the nanocrystalline magnetic ring 22 can also be sleeved on the outside of the ferrite magnetic ring 21. A partition plate 113 is provided between the first groove 111 and the second groove 112 for separation. The end of the partition plate 113 is higher than the ferrite magnetic ring 21 and the nanocrystalline magnetic ring 22. The partition plate 113 is provided with a glue outlet 114 that connects the first groove 111 and the second groove 112. The glue outlet 114 extends upward to the port of the partition plate 113. The ferrite magnetic ring 21 and the nanocrystalline magnetic ring 22 are fixedly connected to the first groove 111 and the second groove 112 respectively by fixing glue. Glue is poured on one side of the partition plate 113, and the fixing glue can flow to the other side of the partition plate 113 through the glue outlet 114, reducing the glue pouring steps and improving production efficiency.

[0046] It should be understood that when one of the ferrite magnetic rings 21 and the nanocrystalline magnetic rings 22 is provided in multiples or both are provided in multiples, the fixing groove 11 can be set as a first groove 111 corresponding to the ferrite magnetic rings 21 and a second groove 112 corresponding to the nanocrystalline magnetic rings 22.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A filter inductor, characterized in that, The device includes a housing, a magnetic core, and a copper busbar. The magnetic core includes at least two magnetic rings that are nested between each other. The copper busbar passes through a through hole in a magnetic ring located in the middle of the magnetic core. The housing has a fixing groove for inserting the magnetic core. The magnetic rings include ferrite magnetic rings and nanocrystalline magnetic rings.

2. The filter inductor according to claim 1, characterized in that, A fixing member is connected between the fixing groove and the magnetic core, and the fixing member is used to fix the magnetic core to the fixing groove.

3. The filter inductor according to claim 2, characterized in that, The fastener is made of adhesive.

4. The filter inductor according to claim 1, characterized in that, A first gap is provided between the ferrite magnetic ring and the side wall of the fixing groove.

5. The filter inductor according to claim 4, characterized in that, The width of the first gap is set to 0.5-0.7 mm.

6. The filter inductor according to claim 1, characterized in that, A second gap is provided between the nanocrystalline magnetic ring and the sidewall of the fixing groove.

7. The filter inductor according to claim 6, characterized in that, The width of the second gap is set to 0.7-1mm.

8. The filter inductor according to claim 1, characterized in that, The sidewall of the fixing groove is fixedly connected with multiple reinforcing protrusions, and a fourth gap is provided between two adjacent reinforcing protrusions.

9. The filter inductor according to claim 1, characterized in that, A support is fixedly connected inside the fixing groove, and the support supports the magnetic core to detach from the bottom surface of the fixing groove.

10. The filter inductor according to any one of claims 1-9, characterized in that, The fixing groove includes a first groove for inserting the ferrite magnetic ring, a second groove for inserting the nanocrystalline magnetic ring, and a partition plate, wherein the partition plate is located between the first groove and the second groove.

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