A magnetic sensor device, an inductor, a transformer

Abstract

The present invention discloses a magnetic sensor device, which includes a magnetic core component and a flat winding; the magnetic core component includes a cylindrical first magnetic core and a second magnetic core that is connected to the head and tail ends of the first magnetic core to jointly form at least one figure-eight magnetic core structure; multiple groups of flat windings are stacked layer by layer in a fitting manner, and each group of flat windings is wound around the first magnetic core; it further includes an air gap provided on the second magnetic core, and the plane where the air gap is located is parallel to the stacking direction of each group of flat windings. In the magnetic sensor device in this application, an air gap is provided in the magnetic core where the flat winding is not wound, and the plane where the air gap is located is parallel to the stacking direction of each group of flat windings. After each group of flat windings is connected to an excitation current, the direction of the induced magnetic field generated at the position where the flat winding is located is basically parallel to the surface of the flat winding, making the current distribution in the flat winding more uniform and reducing the eddy current loss in the magnetic sensor device. This application also provides an inductor and a transformer including the above magnetic sensor device, which have the above beneficial effects.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic components, and particularly to a magnetic sensor device, an inductor, and a transformer. Background Art

[0002] Magnetic sensor devices such as inductors and transformers are all power devices frequently used in industrial production power and other power applications. With the continuous increase in the energy consumption of electrical equipment, in order to achieve requirements such as low carbon emissions, high energy efficiency, and compact volume of electrical energy consumption, the requirements for the efficiency and power density of power electronic converters are constantly increasing.

[0003] In magnetic sensor devices such as inductors and transformers, there are mainly two parts: a conductive winding and a magnetic core. In order to prevent saturation when a relatively large current passes through the conductive winding in practical applications of magnetic sensor devices, an air gap is often required to be provided on the magnetic core column around which the conductive winding is wound. This to a certain extent causes a large eddy current loss in the conductive winding. Summary of the Invention

[0004] The purpose of the present invention is to provide a magnetic sensor device, an inductor, and a transformer, which can reduce the eddy current loss of the winding conductor to a certain extent.

[0005] To solve the above technical problems, the present invention provides a magnetic sensor device, including: a magnetic core component and a flat winding;

[0006] The magnetic core component includes a cylindrical first magnetic core and a second magnetic core connected to the head and tail ends of the first magnetic core to jointly form at least one rectangular magnetic core structure;

[0007] Multiple groups of the flat windings are stacked layer by layer in a laminating manner, and each group of the flat windings is wound around the first magnetic core;

[0008] It further includes an air gap provided on the second magnetic core, and the plane where the air gap is located is parallel to the stacking direction of each group of the flat windings.

[0009] In an optional embodiment of the present application, the flat winding is an annular flat conductor, and each of the annular flat conductors is stacked in sequence along the length direction of the first magnetic core; and each of the annular flat conductors is sleeved on the first magnetic core;

[0010] The air gap is provided on two magnetic cores of the second magnetic core connected to the two ends of the first magnetic core, and the plane where the air gap is located is perpendicular to the annular flat conductor.

[0011] In an optional embodiment of the present application, the thickness of the second magnetic core is greater than the thickness of the first magnetic core; the air gap is a plurality of concentric cylindrical air gap structures centered on the first magnetic core.

[0012] In an alternative embodiment of the present application, the flat winding is a cylindrical structure conductor, and each of the cylindrical structure conductors is nested in sequence with the first magnetic core as the center;

[0013] The air gap is provided on a magnetic core of the second magnetic core in the U-shaped magnetic core structure opposite to the first magnetic core; the air gap is also provided on the first magnetic core; and the plane where the air gap is located is perpendicular to the length direction of the first magnetic core.

[0014] In an alternative embodiment of the present application, the distance between the outermost flat winding in each layer of the flat windings and the inner wall of the U-shaped magnetic core structure is greater than half of the distance between adjacent two air gaps;

[0015] Wherein, the distance between the outermost flat winding and the inner wall of the U-shaped magnetic core structure is the distance between the inner wall of the U-shaped magnetic core structure parallel to and closest to the outermost flat winding and the outermost flat winding.

[0016] In an alternative embodiment of the present application, multiple adjacent air gaps are evenly distributed.

[0017] In an alternative embodiment of the present application, the flat winding is a planar copper foil or a PCB winding; an insulating gasket or an insulating colloid is filled in the air gap.

[0018] The present application also provides an inductor, including the magnetic sensor device described in any one of the above.

[0019] The present application also provides a transformer, including the magnetic sensor device described in any one of the above.

[0020] The magnetic sensor device provided by the present invention includes a magnetic core component and a flat winding; the magnetic core component includes a cylindrical first magnetic core and a second magnetic core connected to the head and tail ends of the first magnetic core together to form at least one U-shaped magnetic core structure; multiple groups of flat windings are stacked layer by layer in a fitting manner, and each group of flat windings is wound around the first magnetic core; an air gap provided on the second magnetic core is also included, and the plane where the air gap is located is parallel to the stacking of each group of flat windings.

[0021] In the inductor device of the present application, an air gap is provided on the second magnetic core of the magnetic core component. The second magnetic core is the magnetic core around which the flat winding is not wound, and the plane where the air gap is located is parallel to the stacking direction of each group of flat windings, that is, parallel to the surface of the flat winding. Therefore, after each group of flat windings is connected to the exciting current, the direction of the induced magnetic field generated at the position of the flat winding is basically parallel to the surface of the flat winding. Compared with the current conventional embodiment in which an air gap is provided on the magnetic core column around which the conductive winding is wound so that the magnetic field direction at the position of the conductive winding is perpendicular to the surface where the conductive winding is located, the induced magnetic field in the present application makes the current distribution in the flat winding more uniform, thereby reducing the eddy current loss in the inductor device.

[0022] The present application also provides an inductor and a transformer including the above inductor device, which have the above beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic cross-sectional view of an inductor device in the prior art;

[0025] Figure 2 It is a schematic cross-sectional structure view of the inductor device provided by the embodiment of the present application;

[0026] Figure 3 For Figure 2 A corresponding three-dimensional structure view of an inductor device;

[0027] Figure 4 For Figure 2 A corresponding three-dimensional structure view of another inductor device;

[0028] Figure 5 It is a schematic cross-sectional structure view of another inductor device provided by the embodiment of the present application;

[0029] Figure 6 For Figure 5 A corresponding three-dimensional structure view of an inductor device;

[0030] Figure 7 It is a schematic diagram of the induced magnetic field distribution of a partial cross-section of the flat winding in the prior art;

[0031] Figure 8 It is a schematic diagram of the induced magnetic field distribution of a partial cross-section of the flat winding in this embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] As shown Figure 1 in the figure Figure 1 is a schematic cross-sectional view of a magnetic sensor device in the prior art. Currently, magnetic sensor devices in components such as transformers and inductors are as shown Figure 1 in the figure. In order to avoid saturation when a relatively large current passes through the conductor winding 02 in the magnetic sensor device, an air gap is generally provided on the magnetic core column 01 around which the conductor winding 02 is wound. Although the saturation problem can be solved after the leakage magnetic air gap 03 is provided, it also makes the direction of the induced magnetic field at the position of the conductor winding 02 in the window of the magnetic sensor device perpendicular to the surface distribution of the conductor winding 02. As shown Figure 1 in the figure, the magnetic field line 30 is perpendicular to the conductor winding 02, and the induced current generated by the induced magnetic field in this direction will be superimposed on the excitation current in the conductor winding 02. As a result, the current density on the side of the conductor winding 02 closer to the magnetic core column 01 is larger, while the current density on the side away from the magnetic core column 01 is smaller, that is, the current distribution is uneven, and this uneven current distribution is mainly caused by eddy current loss.

[0033] Therefore, in this application, by reasonably setting the position of the air gap on the magnetic core, the distribution of the induced magnetic field generated by the conductor winding is made more reasonable, so as to achieve the purpose of reducing the eddy current loss in the magnetic sensor device, and further making the current distribution in the conductor winding uniform.

[0034] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0035] As shown Figures 2 to 6 in the figure Figure 2 is a schematic cross-sectional structure view of a magnetic sensor device provided by an embodiment of the present application, Figure 3 and Figure 2 is a schematic three-dimensional structure view of a corresponding magnetic sensor device; Figure 4 and Figure 2 is another schematic three-dimensional structure view of a corresponding magnetic sensor device; Figure 5 is another schematic cross-sectional structure view of a magnetic sensor device provided by an embodiment of the present application, Figure 6 and Figure 5 is a schematic three-dimensional structure view of a corresponding magnetic sensor device.

[0036] A magnetic sensor device in a specific embodiment of the present application may include:

[0037] a magnetic core component 10 and a flat winding 20;

[0038] The magnetic core component 10 includes a columnar first magnetic core 11 and a second magnetic core 12 connected to the head and tail ends of the first magnetic core 11 to jointly form at least one figure-eight magnetic core structure.

[0039] Multiple sets of flat windings 20 are stacked layer by layer in a fitting manner, and each set of flat windings 20 is wound around the first magnetic core 11.

[0040] It further includes an air gap 13 provided on the second magnetic core 12, and the plane where the air gap 13 is located is parallel to the stacking direction of each set of flat windings 20.

[0041] It should be noted that the flat windings 20 referred to in this application are generally conductors with a flat structure such as a thin sheet or a plate, and multiple sets of flat windings 20 are formed by surface-to-surface fitting. For example, it can be formed by laminating metal copper foils layer by layer.

[0042] Figures 2 to 6 Two different ways of sequentially fitting and stacking the flat windings 20 are shown. In Figures 2 to 4 , each set of flat windings 20 is a conductor with the same annular flat plate structure, and each annular flat plate conductor is stacked and sleeved on the first magnetic core 11 layer by layer; obviously, for Figures 2 to 4 , the stacking direction of each set of flat windings 20 in the shown inductor device is also perpendicular to the surface of the flat windings 20 and parallel to the length direction of the first magnetic core 11.

[0043] In Figures 5 to 6 , the flat windings 20 are conductor structures in a cylindrical shape, and can also be considered as conductor structures in a hollow cylindrical shape. The innermost layer of cylindrical conductor structure is sleeved on the first magnetic core 11, the second layer of cylindrical conductor structure is sleeved on the cylindrical conductor structure, and so on, and each layer of cylindrical conductor structure is sequentially sleeved layer by layer to form multiple turns of sequentially sleeved flat windings 20. Obviously, for Figure 5 and Figure 6 , the stacking direction of its flat windings 20 is obviously the radial direction perpendicular to the length direction of the first magnetic core 1.

[0044] For the magnetic core component 10 in this application, generally a closed magnetic circuit needs to be formed. Therefore, the magnetic core component 10 forms at least one figure-eight magnetic core structure, and in each figure-eight magnetic core structure, one magnetic core side is the magnetic core column around which the conductor winding is wound. In Figures 5 to 6 , the magnetic core structure includes two figure-eight magnetic core structures sharing a magnetic core column around which the conductor winding is wound, that is, the first magnetic core 11. In Figures 5 to 6It only includes one first magnetic core 11. In practical applications, it may include multiple first magnetic cores 11, and multiple sets of flat windings 20 are respectively wound around each first magnetic core 11. In this application, only the simplest two embodiments are taken as examples for illustration. However, it can be understood that the technical solutions in this application can be extended and applied to magnetic core columns with multiple wound conductor windings and inductive devices with multiple figure-eight magnetic core structures, which will not be listed one by one here.

[0045] Based on the above description of the magnetic core component 10 and the flat winding 20 in the inductive device, the setting method of the air gap 13 in this embodiment is further described. In this embodiment, an air gap 13 is provided on the second magnetic core 12, and the plane where the air gap 13 is located is parallel to the superposition direction of the flat winding 20.

[0046] Compared with the conventional air gap setting method, first, the position of the air gap set in this application is different from the position of the leakage magnetic air gap 03 in the conventional technology. The leakage magnetic air gap 03 in the conventional technology is only provided on the first magnetic core 11, while the air gap 13 is provided on the second magnetic core 12 in this application. In addition, the leakage magnetic air gap 03 in the conventional technology is only set along the direction perpendicular to the length direction of the first magnetic core 11, while the setting direction of the air gap 13 in this embodiment is related to the setting method of the flat winding 20. The plane where the air gap 13 is located in this embodiment is parallel to the superposition direction of the flat winding 20, that is, perpendicular to the surface of the flat winding 20.

[0047] For the sake of easy discussion, in Figures 2 to 6 a three-dimensional rectangular coordinate system is established with the length direction of the first magnetic core 11 as the Y-axis direction, the width direction parallel to the magnetic core component 10 as the X-axis direction, and the thickness direction parallel to the magnetic core component 10 as the Z-axis direction.

[0048] In an alternative embodiment of this application, the flat winding 20 can be an annular flat conductor, and the annular flat conductors are sequentially stacked along the length direction of the first magnetic core 11; and each annular flat conductor is sleeved on the first magnetic core 11;

[0049] The air gap 13 is provided on two magnetic cores of the second magnetic core 12 that are connected to both ends of the first magnetic core 11, and the plane where the air gap 13 is located is perpendicular to the annular flat conductor.

[0050] For Figure 3 the shown inductive device, the thickness of the first magnetic core 11 in the Z-axis direction is the same as the thickness of the second magnetic core 11 connected thereto in the Z-axis direction. At this time, the air gap 13 can be a planar structure air gap parallel to the plane where the YZ axis is located, and the plane where the air gap 13 is located is perpendicular to the surface of the flat winding 20.

[0051] It should be noted that although the plane where the XY axes are located is also perpendicular to the surface of the flat winding 20, according to the common sense of setting air gaps in magnetic devices, the air gap 13 generally cannot be set perpendicular to the thickness direction of the magnetic core component 10. Thus, in this embodiment, the air gap 13 perpendicular to the flat winding 20 is parallel to the plane where the XZ axes are located. For the sake of convenience of description, the two magnetic cores directly connected to the two ends of the first magnetic core 11 on the second magnetic core 12 are defined as the transverse magnetic cores 121, and the magnetic cores in the second magnetic core 12 that are not directly connected to the first magnetic core 11 are defined as the side magnetic cores 122. For the magnetic core component 10 where the first magnetic core 11 and the second magnetic core 122 have the same thickness, the air gap 13 should be set on the two transverse magnetic cores 121 in the second magnetic core 122, and the plane where the air gap 13 is located is perpendicular to the annular flat conductor.

[0052] For Figure 4 the magnetic device shown, the thickness of the first magnetic core 11 in the Z-axis direction is less than the thickness of the second magnetic core 12 connected thereto in the Z-axis direction. At this time, if the air gap 13 is set to have the same structure as the air gap 13 shown in Figure 3 , obviously, the induced magnetic field distribution of the flat winding 20 on the front and rear sides of the first magnetic core 11 in the Z-axis direction still cannot be adjusted. Therefore, in another optional embodiment of the present application, it may include:

[0053] The flat winding 20 is an annular flat conductor, and the annular flat conductors are stacked in sequence along the length direction of the first magnetic core 11; and each annular flat conductor is sleeved on the first magnetic core 11;

[0054] The air gap 13 is set on the two magnetic cores in the second magnetic core 12 that are connected to the two ends of the first magnetic core 12;

[0055] The thickness of the second magnetic core 12 is greater than the thickness of the first magnetic core 11; the air gap 13 is a plurality of concentric cylindrical air gap structures centered on the first magnetic core 11.

[0056] The air gap 13 in this embodiment may be an annular cylindrical air gap as shown in Figure 4 , and the annular shape of the annular cylindrical air gap is the same as the annular shape of the flat winding 20. For example, the flat winding 20 in Figure 4 is a circular annular plate-shaped conductor, and correspondingly, the annular air gap is also a cylindrical air gap; if the flat winding is a rectangular cylindrical conductor, the annular air gap should be a rectangular air gap. At this time, the air gap 13 is a cylindrical structure. Obviously, at this time, the plane where the air gap 13 is located is perpendicular to the plane where the XY axes are located, that is, parallel to the stacking direction of the flat winding 20.

[0057] Based on the above discussion, in addition to the structure shown in Figures 2 to 3 , the flat winding 20 in the magnetic device may also be as shown in Figures 5 to 6The structure shown. In another alternative embodiment of the present application, the flat winding 20 is a cylindrical structure conductor, and each cylindrical structure conductor is nested in sequence with the first magnetic core 11 as the center;

[0058] The air gap 13 is arranged on one magnetic core of the second magnetic core 12 in the figure-eight magnetic core structure opposite to the first magnetic core 11; the air gap 13 is also arranged on the first magnetic core 11; and the plane where the air gap 13 is located is perpendicular to the length direction of the first magnetic core 11.

[0059] As Figures 5 to 6 shown, in this embodiment, the flat winding 20 is a cylindrical structure conductor nested layer by layer. Obviously, at this time, the air gap 13 perpendicular to the plane where the flat winding 20 is located can only be parallel to the plane where the XZ axis is located. Based on the common sense of the setting of the air gap 13, obviously the air gap 13 cannot be arranged on the transverse magnetic core 121 at this time. Instead, it can only be arranged on the side magnetic core 122; on this basis, further considering that an air gap 13 perpendicular to the flat winding 20 can also be arranged on the first magnetic core 11. In order to improve the effect of adjusting the distribution of the induced magnetic field, a planar structure air gap parallel to the plane where the XZ axis is located can be arranged on both the first magnetic core 11 and the side magnetic core 122 at the same time.

[0060] Based on the above detailed introduction of the structure of the inductor device in the present application, the principle by which the inductor device provided in the present application can reduce eddy current loss will be described in detail below.

[0061] Refer to Figure 2 , it can be determined according to the magnetic core loop magnetic field analysis that:

[0062]

[0063]

[0064]

[0065] Among them, H is the magnetic field intensity of the magnetic core loop, L is the path of the magnetic core loop, H DA is the magnetic field intensity of the magnetic core loop of the D-A segment, H AP is the magnetic field intensity of the magnetic core loop of the A-P segment, H DQ is the magnetic field intensity of the magnetic core loop of the D-Q segment, H Y is the magnetic field intensity in the Y-axis direction at the position of the flat winding; h is the height of the magnetic core component in the Y-axis direction, w is the width of the magnetic core component in the X-axis direction; N is the total number of turns of the flat winding; N APQD is the number of turns of the flat winding included in the magnetic core loop of A-P-Q-D; I is the current of the flat winding 20.

[0066] Because, for the D-A segment magnetic core without an air gap, it can be regarded as an equipotential body of the magnetomotive force. Therefore,

[0067] Also, since the air gaps on the magnetic paths of the A-P section and the D-Q section have a uniform one-to-one correspondence with the longitudinal (Y-axis direction) arrangement of the flat windings, the magnetomotive forces of the magnetic paths of the A-P section and the D-Q section are equal in magnitude to the ampere-turns enclosed by the loop, that is: From this, H can be deduced. Y ≈0.

[0068] For the E-A section and the B-F section, they also belong to the magnetic cores without air gaps. Therefore, the magnetic field intensity is 0. Thus,

[0069] Therefore, based on the above derivation and referring to the magnetic field line distribution shown in Figure 2 It can be determined that in the embodiment of the air gap 13 setting mode of the inductor device shown in Figure 2 of the present application, the magnetic field direction at the position of the flat winding 20 is generally parallel to the surface of the flat winding 20.

[0070] According to the same analysis method as above, it can be determined that in the prior art shown in Figure 1 , the magnetic field at the position of the flat winding 20 is perpendicular to the surface of the flat winding 20; while in the inductor device shown in Figure 4 , the induced magnetic field at the position of the flat winding 20 is perpendicular to the surface of the flat winding 30.

[0071] Furthermore, referring to Figure 7 and Figure 8 , Figure 7 is a schematic diagram of the induced magnetic field distribution of a partial cross-section of the flat winding in the prior art; Figure 8 is a schematic diagram of the induced magnetic field distribution of a partial cross-section of the flat winding in this embodiment;

[0072] Taking the differential element ds along the direction of the induced magnetic field on the flat winding 20 respectively; according to Ohm's law and Faraday's law of electromagnetic induction, the induced current on the differential element can be obtained as:

[0073]

[0074] Among them, μ, p, l, and t represent the magnetic induction coefficient, resistivity, winding length, and energization duration respectively. Obviously, these four parameters can be regarded as constants.

[0075] For Figure 7 in the flat winding 20 shown, H 感 is the magnetic field H Y ' in the direction perpendicular to the surface of the flat winding, and for Figure 8 in the flat winding 20 shown, H 感 is the H parallel to the surface of the flat winding.x 。

[0076] According to the above analysis of the induced magnetic field distribution, it can be determined that:

[0077]

[0078] And based on the same above analysis method, it can be analyzed and determined that H Y ’ is much greater than H x ; and based on Figure 7 and Figure 8 it can be determined that the microelement ds in the present application is much smaller than the microelement ds in the prior art. Thus, it can be determined that the eddy current generated by the induced magnetic field parallel to the surface of the flat winding 20 at the position where the flat winding is located is much smaller than the eddy current generated by the induced magnetic field perpendicular to the surface of the flat winding 20 at the position where the flat winding 20 is located, and the influence on the current density in the flat winding 20 is very small. It can be seen that when the induced magnetic field is perpendicular to the surface of the flat winding 20, the eddy current and the exciting current in the flat winding are superimposed on each other, and then the current density distribution in the flat winding in the direction perpendicular to the induced magnetic field is uneven; while in the present application, the induced magnetic field is parallel to the surface of the flat winding 20, but because the eddy current is very small, the current in the flat winding 20 is basically still equal to the exciting current, thereby ensuring the uniformity of the current distribution in the flat winding 20 and reducing the eddy current loss.

[0079] Therefore, based on the above discussion, it can be determined that in the inductor device provided in the present application, by providing an air gap parallel to the stacking direction of the flat windings 20 on the magnetic core component 10, the induced magnetic field at the position where the flat windings 20 are located can be adjusted, so that the flat windings 20 are in an induced magnetic field parallel to their surfaces, and the magnitude of the eddy current in the flat windings 20 is greatly reduced, thereby reducing the eddy current loss.

[0080] Based on any of the above embodiments, in another optional embodiment of the present application, it may further include:

[0081] The distance between the outermost flat winding in each layer of flat windings and the inner wall of the rectangular core structure is greater than half of the distance between adjacent two air gaps;

[0082] Wherein, the distance between the outermost flat winding and the inner wall of the rectangular core structure is the distance between the inner wall of the rectangular core structure that is parallel to and closest to the outermost flat winding and the outermost flat winding.

[0083] Referring to Figure 2 and Figure 5 , the distance between adjacent two air gaps 13 is d1, and the distance between the outermost flat winding and the inner wall of the rectangular core structure is d2. According to Figure 2 and Figure 5As shown by the magnetic field lines, it can be determined beyond doubt that inside the magnetic core component, the magnetic field near the air gap is not parallel to the surface of the flat winding 20. To avoid a large eddy current being generated in the flat winding 20 by this induced magnetic field, a gap should be left between the flat winding 30 and the air gap 13; thus, d2 can be set to be greater than 0.5d1.

[0084] Of course, it should be noted that the outermost flat windings in this embodiment should refer to the first and last groups of flat windings that are stacked on top of each other; for example, in Figures 2 to 4 it should refer to the topmost and bottommost flat windings 20, and in Figures 5 to 6 it refers to the flat winding 20 closest to the first magnetic core 11 and the flat winding 20 farthest from the first magnetic core 11.

[0085] In addition, each adjacent air gap 13 should be evenly distributed. For example, on the side magnetic core 122, each air gap 13 adjacent to each other should be evenly distributed on the side magnetic core 122. Similarly, on the transverse magnetic core 121 and the first magnetic core 11, each adjacent air gap should also be evenly distributed, so as to ensure the uniformity of the induced magnetic field distribution.

[0086] Furthermore, insulating gaskets and insulating colloids should be provided in each air gap 13 to ensure the insulation performance of the air gap 13.

[0087] Based on the above discussion, the inductor device provided in this application can be applied to an inductor or a transformer. Whether the inductor device of this application is applied to an inductor or a transformer, it can greatly reduce the eddy current in the flat winding, thereby reducing the eddy current loss of the transformer or inductor and improving the energy transmission efficiency of the transformer and inductor, meeting the current industrial requirements for the high working performance of transformers and inductors.

[0088] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes the inherent elements thereof. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device that includes the said element. In addition, parts of the above technical solutions provided in the embodiments of this application that are the same as the corresponding technical solutions in the prior art in terms of implementation principles are not described in detail to avoid excessive elaboration.

[0089] In this article, specific examples are used to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A magnetic sensor device, characterized in that, Comprising: A magnetic core component and a flat winding; The magnetic core component includes a cylindrical first magnetic core and a second magnetic core connected to the head and tail ends of the first magnetic core to jointly form at least one figure-eight magnetic core structure; Multiple groups of the flat windings are stacked layer by layer in a laminated manner, and each group of the flat windings is wound around the first magnetic core; It further includes an air gap provided on the second magnetic core, and the plane where the air gap is located is parallel to the stacking direction of each group of the flat windings; The distance between the outermost flat winding in each layer of the flat windings and the inner wall of the figure-eight magnetic core structure is greater than half of the distance between adjacent two of the air gaps; Wherein, the distance between the outermost flat winding and the inner wall of the figure-eight magnetic core structure is the distance between the inner wall closest to the outermost flat winding and parallel to the figure-eight magnetic core structure and the outermost flat winding; Multiple adjacent air gaps are evenly distributed; specifically, among the multiple air gaps located on the same magnetic core, they are evenly distributed on the magnetic core where they are located.

2. The magnetic sensor device according to claim 1, wherein The flat winding is an annular flat conductor, and each of the annular flat conductors is stacked in sequence along the length direction of the first magnetic core; and each of the annular flat conductors is sleeved on the first magnetic core; The air gap is provided on two magnetic cores of the second magnetic core connected to the two ends of the first magnetic core, and the plane where the air gap is located is perpendicular to the annular flat conductor.

3. The magnetic sensor device according to claim 2, wherein The thickness of the second magnetic core is greater than the thickness of the first magnetic core; the air gap is a plurality of concentric cylindrical air gap structures centered on the first magnetic core.

4. The magnetic sensor device according to claim 1, wherein The flat winding is a cylindrical structure conductor, and each of the cylindrical structure conductors is sleeved in sequence with the first magnetic core as the center; The air gap is provided on a magnetic core of the figure-eight magnetic core structure opposite to the first magnetic core on the second magnetic core; the air gap is also provided on the first magnetic core; and the plane where the air gap is located is perpendicular to the length direction of the first magnetic core.

5. The magnetic sensor device according to any one of claims 1 to 4, characterized in that, The flat winding is a planar copper foil or a PCB winding; the air gap is filled with an insulating gasket or an insulating colloid.

6. An inductor, characterized in that, Comprising the inductor device according to any one of claims 1 to 5.

7. A transformer, characterized in that, Comprising the inductor device according to any one of claims 1 to 5.

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