Vertical winding common mode choke structure

Abstract

The utility model discloses a vertically-wound common-mode inductor structure, which belongs to the technical field of inductors and comprises a seat body structure, a cover body structure, an annular magnetic core, a vertically-wound coil group and a limiting isolation block, the seat body structure and the cover body structure are oppositely arranged, and the annular magnetic core is arranged between the seat body structure and the cover body structure; the multiple vertically-wound coil sets are evenly arranged in the annular magnetic core in a sleeved mode at intervals, and one limiting isolation block is connected between every two vertically-wound coil sets. The annular magnetic core is clamped between the base body structure and the cover body structure, the base body structure and the external environment are used for installation and connection, and current is guided into the vertically-wound coil assembly from the external environment; and the seat body structure is a structural component which can be modularly replaced so as to facilitate rapid maintenance and replacement. Therefore, the technical problem of how to improve the installation simplicity and convenience of the vertical winding inductor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of inductors, in particular to a vertically wound common-mode inductor structure. Background Art

[0002] An inductor is a circuit element that can convert electrical energy into magnetic energy and store it. It has a certain inductance and only blocks the change of current. When there is no current flowing through the inductor and the circuit is connected, it will try to block the current from flowing; when there is current flowing through the inductor and the circuit is disconnected, it will try to maintain the current unchanged.

[0003] The working principle of inductors is based on the law of electromagnetic induction, that is, when current passes through a wire, it generates a concentric magnetic field. If the wire is bent into a spring shape, the magnetic flux inside the inductor will point in the same direction, thereby enhancing the magnetic field. By adjusting the number of turns, a magnetic field proportional to the number of turns can be generated. The back electromotive force in the inductor is proportional to the rate of change of current per unit time, so it has no effect when direct current passes through, but it will hinder alternating current.

[0004] Inductors play an important role in controlling, detecting, protecting and measuring electronic devices. They can be used to control the operating status of electronic devices, such as controlling the speed and direction of motors; detecting and measuring the strength and direction of electromagnetic fields, as well as changes in electromagnetic fields and events that occur; protecting electronic devices from damage by electromagnetic waves; measuring the strength and direction of electromagnetic fields, the frequency and waveform of electromagnetic waves, and the strength and frequency of electromagnetic signals.

[0005] Vertically wound inductors are inductors made using a specific winding method. Specifically, they can be wound vertically using flat wires or conductors, and this structure helps to achieve miniaturization and high performance of the inductor. Vertically wound inductors are mainly used in power filtering, signal coupling, energy storage and other circuits in electronic devices to provide stable electromagnetic fields and electromagnetic energy conversion functions.

[0006] Based on this, Chinese patent CN104269242A discloses a single-layer vertically wound inductor, which includes a toroidal core and a coil, wherein the toroidal core is composed of at least two core segments, and the coil is wound on the toroidal core in a single layer, wherein the toroidal core has a square cross-section along the radial direction, and each turn of the coil is a square that matches the toroidal core, and the width of each turn of the coil on the inner side of the toroidal core in the circumferential direction is smaller than the width of the outer side of the toroidal core in the circumferential direction. Compared with the prior art, after the wires constituting the coils of the single-layer vertically wound inductor are wound, adjacent turns of the wires are in single line contact or point contact, and the parasitic capacitance formed by the winding is the series connection of all turns, and the EMC effect is greatly improved.

[0007] However, the single-layer vertically wound inductor disclosed above still has the technical problem of difficult installation. Specifically, when using the vertically wound inductor, it needs to be fixedly installed on the circuit board or other preset positions, and then the pins of the inductor need to be connected to the corresponding pads or connectors on the circuit board; and it is necessary to ensure that there is enough space at the position and to facilitate subsequent maintenance and replacement; therefore, appropriate fixings, such as screws, brackets, etc., can be used to fix the inductor on the circuit board or equipment; thereby avoiding the inductor from loosening or shifting during subsequent use. The single-layer vertically wound inductor disclosed in the existing patent is difficult to fix during application due to the lack of appropriate fixings, and is not convenient for modular replacement or substitution in universal design. Utility Model Content

[0008] Based on this, it is necessary to provide a vertically wound common-mode inductor structure to address the technical problem of how to improve the ease of installation of the vertically wound inductor.

[0009] A vertically wound common-mode inductor structure comprises: a base structure, a cover structure, an annular magnetic core, a vertically wound coil group and a limiting isolation block; the base structure and the cover structure are arranged opposite to each other, and the annular magnetic core is arranged between the base structure and the cover structure; a plurality of the vertically wound coil groups are evenly spaced and sleeved in the annular magnetic core, a limiting isolation block is connected between every two vertically wound coil groups, and each limiting isolation block is connected to the base structure.

[0010] Furthermore, the seat structure has a bottom plate, a connecting through hole, a plurality of mounting connecting parts, a plurality of lead wire guide holes and a plurality of position limiting matching blocks.

[0011] Furthermore, the bottom plate and the cover structure are arranged opposite to each other, the connecting through hole is arranged in the middle of the bottom plate, and the cover structure is connected to the connecting through hole.

[0012] Furthermore, a plurality of the installation connection parts are evenly distributed on the other side of the bottom plate relative to the cover structure, and a plurality of the lead wire guide holes are evenly distributed in the bottom plate.

[0013] Furthermore, a plurality of the limiting matching blocks are arranged on the bottom plate below the cover structure, and each of the limiting matching blocks is matched and connected to a corresponding limiting isolation block.

[0014] Furthermore, the cover structure comprises a top cover, a supporting column, a locking portion and a fastener.

[0015] Furthermore, the top cover is arranged relative to the bottom plate, the support column is arranged between the bottom plate and the top cover, and the annular magnetic core is arranged around the periphery of the support column between the top cover and the bottom plate.

[0016] Furthermore, the locking portion is connected to the end of the supporting column, and the locking portion is connected to the connecting through hole; the fastener is arranged on the other side of the base plate relative to the supporting column, and the fastener is connected to the locking portion.

[0017] Furthermore, the vertical winding coil group has a vertical winding frame structure, a socket hole and a winding.

[0018] Furthermore, the sleeve hole is arranged in the vertical winding frame structure, the sleeve hole is sleeved on the annular magnetic core, and the winding is evenly wound and arranged on the vertical winding frame structure.

[0019] In summary, the utility model vertical winding common mode inductor structure is respectively provided with a seat structure, a cover structure, an annular magnetic core, a vertical winding coil group and a limiting isolation block; the seat structure is arranged opposite to the cover structure, and the annular magnetic core is arranged between the seat structure and the cover structure; a plurality of vertical winding coil groups are evenly spaced and sleeved in the annular magnetic core, and a limiting isolation block is connected between each two vertical winding coil groups, and each limiting isolation block is connected to the seat structure. It is achieved by evenly spaced and sleeved a plurality of vertical winding coil groups in the annular magnetic core, and a limiting isolation block is abutted between each two vertical winding coil groups; when the differential mode current passes through the vertical winding coil group, the magnetic flux generated by the adjacent coils is the same in magnitude and opposite in direction, and the two cancel each other out; therefore, the differential mode impedance of the magnetic ring is very small. When the common mode current passes through the inductor coil, the current direction is the same, the magnetic lines of force direction is the same, the induced magnetic field is enhanced, the inductive reactance is increased, and thus the filtering effect on the common mode signal is more significant. In addition, the structural form of the annular magnetic core is clamped between the base structure and the cover structure, and the base structure is used to install and connect with the external environment, and the current is introduced from the external environment into the vertically wound coil group; and the base structure is a structural component that can be modularly replaced, so as to adapt to different installation and use environments, and to perform rapid maintenance and replacement. Therefore, the vertically wound common-mode inductor structure of the utility model solves the technical problem of how to improve the installation convenience of the vertically wound inductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the vertically wound common-mode inductor structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the exploded structure of the vertically wound common-mode inductor structure of the utility model in another direction;

[0022] Figure 3 It is a schematic diagram of the exploded structure of the vertically wound common-mode inductor structure of the utility model in another direction. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0029] Please also read Figures 1 to 3 The utility model comprises a vertically wound common-mode inductor structure including: a seat structure 1, a cover structure 2, an annular magnetic core 3, a vertically wound coil group 4 and a limiting isolation block 5; the seat structure 1 and the cover structure 2 are arranged opposite to each other, and the annular magnetic core 3 is arranged between the seat structure 1 and the cover structure 2; a plurality of the vertically wound coil groups 4 are evenly spaced and sleeved in the annular magnetic core 3, and a limiting isolation block 5 is connected between every two of the vertically wound coil groups 4, and each of the limiting isolation blocks 5 is connected to the seat structure 1.

[0030] Specifically, the vertically wound common-mode inductor structure of the utility model proposes a structure of a vertically wound common-mode inductor, which is formed by evenly arranging a plurality of groups of the vertically wound coil groups 4 in the annular magnetic core 3, and making each two of the vertically wound coil groups 4 abut against a limit isolation block 5; when the differential mode current passes through the vertically wound coil group 4, since the winding directions of the adjacent coils are opposite, and the magnetic fluxes generated by them are of the same magnitude and opposite directions, the two cancel each other out; therefore, the differential mode impedance of the magnetic ring is very small. When the common mode current passes through the inductor coil, since the current direction is the same and the magnetic lines of force are the same, the induced magnetic field is enhanced and the inductive reactance is increased, so the filtering effect on the common mode signal is more significant. Therefore, the vertically wound common-mode inductor structure of the utility model essentially proposes a structural form of a bidirectional filter, which on the one hand filters out the common mode electromagnetic interference on the signal line, and on the other hand suppresses itself from emitting electromagnetic interference to the outside, so as to avoid affecting the normal operation of other electronic equipment in the same electromagnetic environment.

[0031] More specifically, the application scenarios of the vertically wound common-mode inductor structure of the utility model mainly include switching power supplies, motor drives, audio systems, and network communications. In switching power supplies, common-mode inductors are used to filter out interference signals on the power line and improve the quality of the power supply; in motor drive systems, they can reduce the electromagnetic interference generated when the motor is running and improve the efficiency of the motor; in audio systems, common-mode inductors help reduce noise and interference during audio signal transmission; and in network communication systems, such as Ethernet, common-mode inductors can reduce noise and interference during signal transmission and improve communication quality.

[0032] Therefore, the utility model vertically wound common mode inductor structure proposes a structural form of clamping the annular magnetic core 3 between the base structure 1 and the cover structure 2, using the base structure 1 to be installed and connected with the external environment, and introducing the current from the external environment into the vertically wound coil group 4; and the base structure 1 is a structural component that can be modularly replaced, so as to adapt to different installation and use environments, and to perform rapid maintenance and replacement. It can be seen that the utility model vertically wound common mode inductor structure solves the technical problem of how to improve the installation convenience of vertically wound inductors.

[0033] Further, the seat structure 1 has a bottom plate 101, a connecting through hole 102, a plurality of mounting connection parts 103, a plurality of lead guide holes 104 and a plurality of position limiting matching blocks 105; the bottom plate 101 is arranged opposite to the cover structure 2, the connecting through hole 102 is arranged in the middle of the bottom plate 101, and the cover structure 2 is connected to the connecting through hole 102; a plurality of the mounting connection parts 103 are evenly distributed on the other side of the bottom plate 101 relative to the cover structure 2, and a plurality of the lead guide holes 104 are evenly distributed in the bottom plate 101. A plurality of the position limiting matching blocks 105 are arranged on the bottom plate 101 below the cover structure 2, and each of the position limiting matching blocks 105 is matched and connected to a position limiting isolation block 5. Specifically, the bottom plate 101 is a bearing structure, on which the cover structure 2 is arranged, and the cover structure 2 is connected to the bottom plate 101 through the connecting through hole 102. The installation connection portion 103 is used to match the bottom plate 101 to an external installation environment; the lead wire guide hole 104 is used to introduce external current into the vertical winding coil group 4.

[0034] Furthermore, the cover structure 2 has a top cover 201, a supporting column 202, a locking portion 203 and a fastener 204; the top cover 201 is arranged relative to the bottom plate 101, the supporting column 202 is abutted between the bottom plate 101 and the top cover 201, and the annular magnetic core 3 is arranged around the periphery of the supporting column 202 between the top cover 201 and the bottom plate 101; the locking portion 203 is connected to the end of the supporting column 202, and the locking portion 203 is connected to the connecting through hole 102; the fastener 204 is arranged on the other side of the bottom plate 101 relative to the supporting column 202, and the fastener 204 is connected to the locking portion 203.

[0035] Furthermore, the vertical winding coil group 4 has a vertical winding skeleton structure 401, a socket hole 402, a winding 403 and a pin structure 404; the socket hole 402 is set in the vertical winding skeleton structure 401, the socket hole 402 is sleeved on the annular magnetic core 3, and the winding 403 is evenly wound on the vertical winding skeleton structure 401; the pin structure 404 is correspondingly connected to the winding 403, and each pin structure 404 is correspondingly connected to one of the lead guide holes 104.

[0036] Furthermore, the limiting isolation block 5 has an interval limiting body 501 and a limiting matching hole 502, each of the interval limiting bodies 501 is arranged between the two vertical winding frame structures 401, and each of the interval limiting bodies 501 is provided with a limiting matching hole 502, and each of the limiting matching holes 502 corresponds to and is connected to a limiting matching block 105.

[0037] In summary, the vertically wound common mode inductor structure of the utility model is respectively provided with a seat structure 1, a cover structure 2, an annular magnetic core 3, a vertically wound coil group 4 and a limiting isolation block 5; the seat structure 1 and the cover structure 2 are arranged opposite to each other, and the annular magnetic core 3 is arranged between the seat structure 1 and the cover structure 2; a plurality of the vertically wound coil groups 4 are evenly spaced and sleeved in the annular magnetic core 3, and a limiting isolation block 5 is connected between every two of the vertically wound coil groups 4, and each of the limiting isolation blocks 5 is connected to the seat structure 1. It is achieved by evenly spaced and sleeved a plurality of groups of the vertically wound coil groups 4 in the annular magnetic core 3, and a limiting isolation block 5 is abutted between every two of the vertically wound coil groups 4; when the differential mode current passes through the vertically wound coil group 4, since the winding directions of the adjacent coils are opposite, and the magnetic fluxes generated by them are of the same magnitude and opposite directions, the two cancel each other out; therefore, the differential mode impedance of the magnetic ring is very small. When the common-mode current passes through the inductor coil, the induced magnetic field is enhanced and the inductive reactance is increased due to the same current direction and magnetic lines of force direction, thus significantly filtering the common-mode signal. In addition, the structural form of the annular magnetic core 3 is clamped between the seat structure 1 and the cover structure 2, and the seat structure 1 is used to install and connect with the external environment, and the current is introduced from the external environment into the vertically wound coil group 4; and the seat structure 1 is a structural component that can be modularly replaced, so as to adapt to different installation and use environments, and to perform rapid maintenance and replacement. Therefore, the vertically wound common-mode inductor structure of the utility model solves the technical problem of how to improve the ease of installation of vertically wound inductors.

[0038] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A vertically wound common mode inductor structure, characterized in that: The invention comprises: a base structure (1), a cover structure (2), an annular magnetic core (3), a vertical winding coil group (4) and a limiting isolation block (5); the base structure (1) and the cover structure (2) are arranged opposite to each other, and the annular magnetic core (3) is arranged between the base structure (1) and the cover structure (2); a plurality of the vertical winding coil groups (4) are evenly spaced and sleeved in the annular magnetic core (3), and a limiting isolation block (5) is connected between every two vertical winding coil groups (4), and each limiting isolation block (5) is connected to the base structure (1).

2. The vertically wound common mode inductor structure according to claim 1, characterized in that: The seat structure (1) comprises a bottom plate (101), a connecting through hole (102), a plurality of mounting connection parts (103), a plurality of lead wire guide holes (104) and a plurality of position limiting matching blocks (105).

3. The vertically wound common mode inductor structure according to claim 2, characterized in that: The bottom plate (101) and the cover structure (2) are arranged opposite to each other, the connecting through hole (102) is arranged in the middle of the bottom plate (101), and the cover structure (2) is connected to the connecting through hole (102).

4. The vertically wound common mode inductor structure according to claim 3, characterized in that: A plurality of the installation connection parts (103) are evenly distributed on the other side of the bottom plate (101) relative to the cover structure (2), and a plurality of the lead wire guide holes (104) are evenly distributed in the bottom plate (101).

5. The vertically wound common mode inductor structure according to claim 4, characterized in that: A plurality of the limiting matching blocks (105) are arranged on the bottom plate (101) below the cover structure (2), and each of the limiting matching blocks (105) is matched and connected to a corresponding limiting isolation block (5).

6. The vertically wound common mode inductor structure according to claim 5, characterized in that: The cover structure (2) comprises a top cover (201), a supporting column (202), a locking portion (203) and a fastener (204).

7. The vertically wound common mode inductor structure according to claim 6, characterized in that: The top cover (201) is arranged relative to the bottom plate (101), the support column (202) is arranged in contact between the bottom plate (101) and the top cover (201), and the annular magnetic core (3) is arranged between the top cover (201) and the bottom plate (101) and around the periphery of the support column (202).

8. The vertically wound common mode inductor structure according to claim 7, characterized in that: The locking portion (203) is connected to the end of the supporting column (202), and the locking portion (203) is connected to the connecting through hole (102); the fastener (204) is arranged on the other side of the bottom plate (101) relative to the supporting column (202), and the fastener (204) is connected to the locking portion (203).

9. The vertically wound common mode inductor structure according to claim 8, characterized in that: The vertical winding coil group (4) comprises a vertical winding frame structure (401), a socket hole (402) and a winding (403).

10. The vertically wound common mode inductor structure according to claim 9, characterized in that: The sleeve hole (402) is arranged in the vertical winding frame structure (401), the sleeve hole (402) is sleeved on the annular magnetic core (3), and the winding (403) is evenly wound and arranged on the vertical winding frame structure (401).

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