CN109754988B

CN109754988B - Coil component and method for manufacturing same

Info

Publication number: CN109754988B
Application number: CN201910147607.5A
Authority: CN
Inventors: 黄敬新; 尉朗; 林艺冰; 冯文俊
Original assignee: Shenzhen Sunlord Electronics Co Ltd
Current assignee: Dongguan Hualuo Electronics Co ltd
Priority date: 2019-02-27
Filing date: 2019-02-27
Publication date: 2020-06-23
Anticipated expiration: 2039-02-27
Also published as: CN109754988A; WO2020173005A1; JP2021520653A; JP7016447B2

Abstract

The invention discloses a coil component and a manufacturing method thereof. The coil part includes a winding core part including a winding center part having first and second flange parts at both ends, respectively, a first external electrode and a second external electrode provided on the first and second flange parts, respectively, a third external electrode and a fourth external electrode provided on the first and second flange parts, respectively; the second wire is inserted into a recess or gap between adjacent turns of the first wire such that the coil component presents at least one double layer winding region and/or at least one single layer winding region. The manufacturing method can obtain the coil component. The inclined capacitance in the same turn of the two groups of wires can be effectively offset, and the mode conversion characteristic and the noise of the coil component can be further reduced.

Description

Coil component and method for manufacturing same

Technical Field

The present invention relates to the field of common mode coil components, and more particularly to a winding structure of a winding type coil component in which two wire materials are wound around a core.

Background

The wire-wound coil component is mainly used for high-speed serial data transmission signal lines, and selectively removes common-mode noise current from two groups of signal lines for differential signal transmission through a pair of mutually magnetically coupled coils. When the differential signal flows through the coil component, the two groups of wires generate reverse magnetic fields which are mutually offset and present low damping; when the common mode current flows through the coil, the current generates a magnetic field in the same direction, and the inductive reactance of the coil is increased, so that the filtering effect is achieved. The conventional winding type coil component has a structure using a ring core and a structure using a drum core, and the winding type coil component of the drum core structure has lower effective permeability and lower noise removal performance compared with the ring core, but the ring core has to rely on manual winding due to the difficulty of automatic winding, and the drum core coil can be automatically wound, has smaller characteristic deviation and is more suitable for mass production.

In the traditional drum-shaped core coil component, because two groups of wires are asymmetric, part of differential mode signals are easily converted into common mode signals in the using process, and part of the common mode signals are converted into differential mode signals, so that the radiation noise or the anti-interference performance of the coil component is reduced.

The mode conversion characteristic (Scd21) indicates the ratio of the coil component differential signal component converted into common mode noise and output, and is mainly caused by the balance of stray capacitance (i.e., distributed capacitance) between two groups of wires being broken. Chinese patent publication No. CN103887040A discloses that the balance of stray capacitance generated between different turns of the first wire and the second wire is destroyed as a main cause, so that the skew capacitance is balanced in the whole of the two sets of wires, the influence of stray capacitance on the whole circuit is reduced, and the mode conversion characteristic is reduced. However, the application of the product puts higher demands on the mode conversion characteristics of the coil component, and the existing coil component cannot meet the demands.

Disclosure of Invention

The present invention is directed to a coil component and a method for manufacturing the same, which overcome at least one of the disadvantages of the related art.

In order to solve the technical problems, the invention adopts the following technical scheme:

a coil component comprising:

a winding core part including a winding center part having a first flange part and a second flange part at both ends, respectively;

a first wire and a second wire that are wound in a spiral shape from the first flange portion toward the second flange portion in the winding center portion; wherein the first wire and the second wire are spirally wound around the winding center portion with the same number of turns;

first and third outer electrodes respectively disposed on the first and second flange portions and respectively connected to one end and the other end of the first wire;

a second external electrode and a fourth external electrode respectively provided on the first flange portion and the second flange portion and respectively connected to one end and the other end of the second wire;

the second wire is embedded into a recess or gap between adjacent turns of the first wire;

there is at least one double layer winding region and/or at least one single layer winding region; in one of the two-layer winding regions or one of the single-layer winding regions, the sum of the number of turns of the first wire and the second wire is equal to or different by 1 to 3 turns;

the double-layer winding area and/or the single-layer winding area are/is divided into a first half turn and a second half turn between every two turns of two groups of wires in the direction perpendicular to the axis of the winding core part, so that a half-turn winding area is formed;

within one half turn winding region of the double layer winding region: the nth turn of the second wire is embedded into a concave part between the nth turn and n +1 turn of the first wire, so that a winding area with a half turn of +0.5 turns staggered is formed between the first wire and the second wire;

in the other half-turn winding region of the double-layer winding region: the nth turn of the second wire is embedded into a concave part between the (n-1) th turn and the nth turn of the first wire, so that a winding area with a half turn of 0.5 turns staggered is formed between the first wire and the second wire;

within one half turn winding region of the single winding layer winding region: the nth turn of the second wire is embedded into a gap between the nth turn and the n +1 turn of the first wire, thereby forming a winding area staggered by +1.0 turns by half turns between the first wire and the second wire;

in the other half-turn winding region of the single-layer winding region: the nth turn of the second wire is embedded in the gap between the (n-1) th turn and the nth turn of the first wire, thereby forming a winding area with a staggered turn of-1.0 half turn between the first wire and the second wire.

In some preferred embodiments, the winding layer winding region is a multi-segment side-by-side winding.

In some preferred embodiments, the first wire and the second wire are wound in a double-wire form on the winding center portion.

In some preferred embodiments, the sum of the number of turns of the first wire in the winding region of each winding layer is equal to or different from the sum of the number of turns of the second wire in the winding region of each winding layer by 1 to 3 turns.

In some preferred embodiments, the number of winding regions of the winding layer is three or more; the sum of the turns between the winding areas of different winding layers is equal or different by p turns, wherein p is a natural number.

In another aspect, the present invention also provides a method of manufacturing a coil component including a winding core portion including a winding center portion having first and second flange portions at both ends, respectively, a first external electrode and a third external electrode provided on the first and second flange portions, respectively, a second external electrode and a fourth external electrode provided on the first and second flange portions, respectively; the manufacturing method comprises the following steps:

winding a first wire and a second wire in a spiral shape on the winding center portion from the first flange portion toward the second flange portion; wherein the first wire and the second wire are spirally wound around the winding center portion with the same number of turns; connecting the first external electrode and the third external electrode to one end and the other end of the first wire respectively, and connecting the second external electrode and the fourth external electrode to one end and the other end of the second wire respectively;

inserting the second wire into a recess or gap between adjacent turns of the first wire such that there is at least one double layer winding area and/or at least one single layer winding area of the coil component; equalizing the sum of the number of turns of the first wire and the second wire in one of the two-layer winding regions or one of the single-layer winding regions;

enabling the double-layer winding area and/or the single-layer winding area to be divided into a first half turn and a second half turn between every two turns of two groups of wires in the direction perpendicular to the axis of the winding core part to form a half turn winding area;

within one half turn winding region of the double layer winding region: embedding the nth turn of the second wire into a recess between the nth turn and the n +1 turn of the first wire, thereby forming a winding area staggered by +0.5 turns by a half turn between the first wire and the second wire;

in the other half-turn winding region of the double-layer winding region: embedding the nth turn of the second wire into the recess between the (n-1) th turn and the nth turn of the first wire, thereby forming a staggered-0.5 turn half turn winding area between the first wire and the second wire;

within one half turn winding region of the single winding layer winding region: embedding the nth turn of the second wire into a gap between the nth turn and the n +1 turn of the first wire, thereby forming a staggered +1.0 turn half turn winding region between the first wire and the second wire;

in the other half-turn winding region of the single-layer winding region: embedding the nth turn of the second wire into the gap between the (n-1) th turn and the nth turn of the first wire, thereby forming a staggered-1.0 turn half turn winding region between the first wire and the second wire.

In some preferred embodiments, the winding layer winding regions are wound in multiple sections side by side.

In some preferred embodiments, the number of winding regions of the winding layer is three or more; the sum of the number of turns between winding areas of different winding layers is equal or different by p turns, wherein p is a natural number.

Compared with the prior art, the invention has the beneficial effects that:

in a winding area obtained by adopting a winding mode of double winding layers, two groups of wires are wound around the central part of a winding, and a first half turn and a second half turn exist between every two turns of the two groups of wires in the direction vertical to the axis of the winding core part; in the winding area of the first half turn, the nth turn of the second wire is embedded into a concave part between the nth turn and the (n + 1) th turn of the first wire, and at the moment, the second wire and the first wire are staggered by +0.5 turn; in the winding area of the second half turn, the nth turn of the second wire is embedded into the concave part between the (n-1) th turn and the nth turn of the first wire, and at the moment, the second wire is staggered from the first wire by-0.5 turn. The winding area of the first half turn staggered by +0.5 turns generates an oblique capacitor which can be numerically-1, and the winding area of the second half turn staggered by-0.5 turns generates an oblique capacitor which can be numerically-1; the two groups of wires generate an inclined capacitor with the first half turn of +1 'and the second half turn of-1' in the same turn of coil, the inclined capacitors in the same turn of the two groups of wires can be effectively offset, the unbalance of the inclined capacitors in the coil component is reduced to the maximum extent, the mode conversion is reduced, and the coil component has higher stability;

in a winding area obtained by adopting a winding mode of a single-layer winding layer, two groups of wires are wound around the central part of a winding, and a first half turn and a second half turn exist between every two turns of the two groups of wires in the direction vertical to the axis of the winding core part; in the winding area of the first half turn, the nth turn of the second wire is embedded into a gap between the nth turn and the (n + 1) th turn of the first wire, and at the moment, the second wire and the first wire are staggered by +1.0 turn; in the winding area of the second half turn, the nth turn of the second wire is embedded into a gap between the (n-1) th turn and the nth turn of the first wire, and at the moment, the second wire and the first wire are staggered by-1.0 turn; the winding area of the first half turn staggered by +1.0 turn generates an oblique capacitor which can be numerically into +2 ', and the winding area of the second half turn staggered by-1.0 turn generates an oblique capacitor which can be numerically into-2'; therefore, the two groups of wires generate the inclined capacitance with the first half turn of +2 'and the inclined capacitance with the second half turn of-2' in the same turn of coil, the inclined capacitances in the same turn of the two groups of wires can be effectively offset, the unbalance of the inclined capacitance in the coil component is reduced to the maximum extent, the mode conversion is reduced, and the coil component has higher stability;

according to the above, the coil component obtained by the single-layer winding method and/or the double-layer winding method can effectively cancel the inclined capacitance of the two groups of wires in the same turn, and can further reduce the mode conversion characteristic and the noise of the coil component, so that the coil component has higher stability.

Drawings

Fig. 1 is an external perspective view of a coil component according to embodiment 1 of the present invention;

fig. 2 is a schematic view schematically showing a winding state in which a first wire and a second wire in the coil component shown in fig. 1 are wound in a double-layer winding layer;

fig. 3 is a cross-sectional view illustrating an oblique capacitance generated between the first wire and the second wire shown in fig. 2;

FIG. 4 is an equivalent circuit diagram illustrating in more detail the skew capacitance generated in the winding area of-0.5 one and a half turns staggered between the first wire and the second wire shown in FIG. 3;

FIG. 5 is an equivalent circuit diagram illustrating in more detail the skew capacitance generated in the + 0.5-turn half-turn winding region between the first wire and the second wire shown in FIG. 3;

fig. 6 is a schematic view schematically showing a winding state of a first wire material and a second wire material of a coil component according to embodiment 2 of the invention;

fig. 7 is a schematic view schematically showing a wound state of a first wire material and a second wire material of a coil component according to embodiment 3 of the invention;

fig. 8 is a schematic view schematically showing a winding state of a first wire material and a second wire material of a coil component according to embodiment 4 of the invention;

fig. 9 is a schematic view schematically showing a winding state of a first wire material and a second wire material of a coil component according to embodiment 5 of the invention;

fig. 10 is a diagram schematically showing a winding state in which the first wire and the second wire of the coil component according to embodiment 6 of the invention are wound in a single-layer winding manner;

fig. 11 is a cross-sectional view illustrating an oblique capacitance generated between the first wire and the second wire shown in fig. 10;

FIG. 12 is an equivalent circuit diagram illustrating in more detail the skew capacitance generated in the winding area of-1.0 one and a half turns of the first wire and the second wire shown in FIG. 11;

FIG. 13 is an equivalent circuit diagram illustrating in more detail the skew capacitance generated in the winding region of +1.0 turn half turn between the first wire and the second wire shown in FIG. 11;

fig. 14 is a schematic view schematically showing a wound state of a first wire and a second wire of a coil component according to embodiment 7 of the invention;

fig. 15 is a schematic view schematically showing a wound state of a first wire and a second wire of a coil component according to embodiment 8 of the present invention;

fig. 16 is a schematic view schematically showing a wound state of a first wire and a second wire of a coil component according to embodiment 9 of the invention;

fig. 17 is a schematic view schematically showing a winding state of a first wire material and a second wire material of a coil component according to embodiment 10 of the present invention;

fig. 18 is a schematic view schematically showing a wound state of a first wire and a second wire of a coil component according to embodiment 11 of the present invention;

fig. 19 is a schematic view schematically showing a wound state of a first wire material and a second wire material of a coil component according to embodiment 12 of the invention;

fig. 20 is a schematic view schematically showing a wound state of a first wire material and a second wire material of a coil component according to embodiment 13 of the invention;

fig. 21 is a schematic view schematically showing a winding state of a first wire and a second wire of a coil component of a comparative example;

FIG. 22 is a spectrum diagram of a comparison scheme and embodiment 1 of the present invention;

fig. 23 is a schematic view schematically showing a winding state of a first wire and a second wire of a coil component of the 2 nd comparative example;

fig. 24 is a spectrum diagram of the 2 nd comparison scheme and the 1 st embodiment of the present invention.

Detailed Description

Referring to fig. 1 to 20, embodiments of the present invention will be described in detail below. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.

Embodiments of the present invention provide a drum core coil component that achieves effective reduction of mode conversion characteristics while achieving higher stability by subjecting the same turn generated on two sets of coils, respectively, to a balance between different inter-turn capacitances.

Referring to fig. 1, to achieve the above object, a coil component according to an embodiment of the present invention includes a drum core winding part 1, a first external electrode 21, a second external electrode 22, a third external electrode 23, a fourth external electrode 24, and a magnetic cover 4, the winding part 1 includes a winding center part 11 having a first flange part 12 at one end and a second flange part 13 at the other end, the first external electrode 21 and the third external electrode 23 are respectively disposed on the first flange part 12 and the second flange part 13, the second external electrode 21 and the fourth external electrode 24 are respectively disposed on the first flange part 12 and the second flange part 13, and the magnetic cover 4 is adhered to the drum core winding part 1 by epoxy glue.

The winding state of the two-layer winding layers of the first wire 31 and the second wire 32 in the coil component shown in fig. 1 is schematically shown in fig. 2. In order to clearly distinguish the two sets of

wires

31 and 32, cross-sectional views of the first wire 31 are shaded in fig. 2 and subsequent drawings. In which portions of the two sets of

wires

31 and 32 around the drum core 1 to be wound are schematically indicated by solid lines on the front side of the drum core 1 and the shaded portions are schematically indicated by broken lines.

In embodiment 1 of the present invention, referring to fig. 1 and 2, in fig. 2, a first wire 31 and a second wire 32 are wound in an up-down arrangement around a drum core winding portion 1, the second wire 32 is embedded with most of it into a recess formed between adjacent turns of the first wire 31 and a second layer winding layer is formed outside the first layer winding layer, thereby forming a two-layer winding region. The starting end of the first wire 31 is connected to the second outer electrode 22, and is wound from the side of the first flange portion 12 to the side of the second flange portion 13 in a state where adjacent turns are closely arranged on the surface of the winding center portion 11, while the ending end of the first wire 31 is connected to the third outer electrode 23, thereby forming a first layer of winding layer closely arranged around the surface of the winding center portion 11.

The two sets of

wires

31 and 32 shown in FIG. 2 are wound around the winding core, and there are first and second half turns between each turn of the two sets of

wires

31 and 32 in the direction perpendicular to the axis of the winding core 1. Taking the 2 nd turn of the second wire 32 as an example, the first half turn of the 2 nd turn of the second wire 32 is embedded into the concave part between the 2 nd turn and the 3 rd turn of the first wire 31, and so on, so as to form a winding area of the first half turn; in the same turn of the 2 nd turn of the second wire 32, the second half turn of the 2 nd turn of the second wire 32 is embedded into the concave part between the 1 st turn and the 2 nd turn of the first wire 31, and so on, to form a winding area of the second half turn. At this time, the start end of the second wire 32 is connected to the third external electrode 23, and the nth turn of the second wire 32 is fitted into the recesses of the nth turn and the (n + 1) th turn of the first wire 31 in the first half turn winding region until the 28 th turn is wound. The nth turn of the second wire 32 is inserted into the recess between the (n-1) th turn and the nth turn of the first wire 31 in the winding region of the second half turn until the 28 th turn, and the terminal end of the second wire 32 is connected to the fourth external electrode 24.

The mode conversion characteristic Scd21 is the ratio of the differential signal component of the coil winding element converted to the common mode noise and is output, and can be described based on the stray capacitance (i.e., the distributed capacitance) generated by the coil winding elements in fig. 3 to 5. Fig. 3 is a cross-sectional view of two groups of

wires

31 and 32 partially wound in a winding state to generate an oblique capacitance, including a first half-turn winding region and a second half-turn winding region, where the first half-turn winding region is a winding region with +0.5 turns and a half-turn, and a first layer of winding layer is formed by the first wire 31, and a 1 st turn of the second wire 32 is inserted into a recess between a 1 st turn and a 2 nd turn of the first wire 31, that is, an nth turn of the second wire 32 is inserted into a recess between an nth turn and an n +1 th turn of the first wire 31. The second half turn winding area is a winding area staggered by-0.5 turn and half turn, the relative positions of the two groups of

wires

31 and 32 are changed, the 2 nd turn of the second wire 32 is embedded into a concave part between the 1 st turn and the 2 nd turn of the first wire 31, namely the n-th turn of the second wire 32 is embedded into a concave part between the n-1 st turn and the n-th turn of the first wire 31. The stray capacitance between turns of the two sets of

wires

31 and 32 in the winding areas shown in fig. 3 is illustrated in fig. 4 and 5, where one turn of each of the two sets of

wires

31 and 32 is indicated by an inductor symbol. The stray capacitance in the coil component includes stray capacitance generated between the 1 st turn of the first wire 31 and the 1 st turn of the second wire 32, stray capacitance generated between the 2 nd turn of the first wire 31 and the 2 nd turn of the second wire 32, and the like. The main reason for the increase of the mode conversion characteristic Scd21 is the stray capacitance generated between the two sets of

wires

31 and 32, wherein the stray capacitance Cd between different turns between the two sets of

wires

31 and 32 has the largest influence, i.e. the skew capacitance Cd, so the stray capacitance Cd generated between different turns between the two sets of

wires

31 and 32 is mainly shown in fig. 4 and 5.

In the first half turn winding, i.e., offset by +0.5 turn half turn winding, shown in FIG. 4, the diagonal capacitance Cd1 has a "right-diagonal down" connection direction, and these diagonal capacitances are numbered as "+". In the second half turn winding region shown in FIG. 5, i.e., offset by-0.5 turn half turn winding region, the diagonal capacitance Cd2 is shown with a "right diagonal up" connection direction, and these diagonal capacitances are numbered as a "-" symbol; it can be seen that the directions of the ramp capacitor Cd1 and the ramp capacitor Cd2 are opposite. In the case where the distance in the axial direction of the winding center portion 11 between the turns of the first wire 31 and the second wire 32 generating the skew capacitance shown in fig. 4 and 5 is 0.5D (D is the coil wire diameter), the absolute value of the skew capacitance is set to "1". Referring to fig. 4, it can be seen that the diagonal capacitance Cd1 corresponding to the 2 nd turn of the second wire 32 in the winding area of the first half turn is "+ 1". Referring to fig. 5, the diagonal capacitance Cd2 corresponding to the winding area of the second 2 nd turn of the second wire 32 is "-1". Thus, in the 2 nd turn of the second wire 32, the corresponding oblique capacitances of the first half turn and the second half turn can be mutually offset; that is, the diagonal capacitance corresponding to the n-th turn of the second wire 32 in the winding area of the first half turn staggered by +0.5 turn is "+ 1", and the diagonal capacitance Cd2 corresponding to the winding area of the second half turn staggered by-0.5 turn is "-1", so that the diagonal capacitance corresponding to the first half turn and the diagonal capacitance corresponding to the second half turn in the n-th turn of the second wire 32 can be cancelled out. According to the coil component obtained by the winding method, the oblique capacitances in the turns between the two groups of

wires

31 and 32 in the coil component can be mutually offset to the maximum extent, the mode conversion characteristic and the noise can be further reduced, and the coil component has higher stability.

In addition to the above, the following cases also fall within the scope of the present invention.

A coil component according to embodiment 2 of the present invention will be described with reference to fig. 6. The two sets of

wires

31 and 32 are wound around the winding core 11, and in the first half turn winding region perpendicular to the axial direction of the winding core 1, the 2 nd turn of the second wire 32 is fitted into the recess between the 1 st turn and the 2 nd turn of the first wire 31, that is, the n-th turn of the second wire 32 is fitted into the recess between the n-1 st turn and the n-th turn of the first wire 31, thereby forming a half turn winding region with a shift of-0.5 turns. In the second half turn winding region, the 1 st turn of the second wire 32 is inserted into the recess between the 1 st turn and the 2 nd turn of the first wire 31, that is, the nth turn of the second wire 32 is inserted into the recess between the nth turn and the (n + 1) th turn of the first wire 31, so as to form a winding region with a half turn of +0.5 turns. Taking the 2 nd turn of the second wire 32 as an example, the first half turn of the 2 nd turn of the second wire 32 corresponds to an oblique capacitance of "-1" in the winding region of the first half turn staggered by-0.5 turns, and the second half turn of the 2 nd turn of the second wire 32 corresponds to an oblique capacitance of "+ 1" in the winding region of the second half turn staggered by +0.5 turns, so that the corresponding oblique capacitances in the 2 nd turn whole turn of the second wire 32 are mutually cancelled. By analogy, the inclined capacitance corresponding to the first half turn in the nth turn of the second wire 32 and the inclined capacitance corresponding to the second half turn can be mutually offset. According to the coil component obtained by the winding method, the oblique capacitance in each turn between the two groups of

wire materials

31 and 32 can be mutually offset to the maximum extent, the mode conversion characteristic and the noise can be further reduced, and the coil component has higher stability.

A coil component according to embodiment 3 of the present invention will be described with reference to fig. 7. The two sets of

wires

31 and 32 are wound around the winding core 11 and divided into a winding area a and a winding area B in the axial direction of the winding core 1, and also divided into a first half-turn winding area and a second half-turn winding area in the direction perpendicular to the axial direction of the winding core 1. In the winding region of the first half turn staggered by-0.5 turn in the winding region a, the 2 nd turn of the second wire 32 is embedded in the concave portion between the 1 st turn and the 2 nd turn of the first wire 31, that is, the nth turn of the second wire 32 is embedded in the concave portion between the n-1 st turn and the nth turn of the first wire 31; in the second half winding region shifted by +0.5 turn in the winding region a, the 1 st turn of the second wire 32 is fitted into the recess between the 1 st turn and the 2 nd turn of the first wire 31, that is, the nth turn of the second wire 32 is fitted into the recess between the nth turn and the n +1 th turn of the first wire 31. In the above winding manner, the two sets of

wires

31 and 32 are wound up to the 14 th turn in the winding area a. In the winding region of the first half turn staggered by-0.5 turn in the winding region B, the 16 th turn of the second wire is embedded in the concave portion between the 15 th turn and the 16 th turn of the first wire 31, that is, the nth turn of the second wire 32 is embedded in the concave portion between the n-1 th turn and the nth turn of the first wire 31; in the second half winding region shifted by +0.5 turns in the winding region B, the 15 th turn of the second wire 32 is fitted into the concave portion between the 15 th turn and the 16 th turn of the first wire 31, that is, the nth turn of the second wire 32 is fitted into the concave portion between the nth turn and the (n + 1) th turn of the first wire 31. In the above winding manner, the two sets of

wires

31 and 32 are wound up to the 28 th turn in the winding region B. Similar to the above embodiments of the present invention, the first half turn and the second half turn of the nth turn of the second wire 32 in the winding area a and the winding area B may have different capacitances. According to the coil component obtained by the winding mode, the oblique capacitance in each turn between the two groups of

wire materials

31 and 32 can be mutually offset to the maximum extent, the mode conversion characteristic and the noise can be further reduced, and the stability is higher.

It should be noted that, in the embodiment of the present invention, the total number of turns of the two sets of

wires

31 and 32 in the winding area a is the same, the total number of turns of the two sets of

wires

31 and 32 in the winding area B is the same, and the number of turns of the first wire 31 in the winding area a is not equal to that of the second wire 32 in the winding area a, and that of turns of the second wire 32 in the winding area B are not equal to that of the first wire, which also belongs to the protection scope of the present invention.

A coil component according to embodiment 4 of the present invention will be described with reference to fig. 8. The two sets of

wires

31 and 32 are wound around the winding core 11 and divided into a winding area a and a winding area B in the axial direction of the winding core 1, and also divided into a first half-turn winding area and a second half-turn winding area in the direction perpendicular to the axial direction of the winding core 1. In the winding area A, the winding area of the first half turn is a winding area of plus 0.5 turns and the winding area of the second half turn is a winding area of minus 0.5 turns and half turns. In the winding area B, the winding area of the first half turn is a winding area of plus 0.5 turns and the winding area of the second half turn is a winding area of minus 0.5 turns and half turns. The coil component obtained by the winding mode has the advantages that the inner oblique capacitance of each turn between the two groups of

wire rods

31 and 32 can be mutually offset to the maximum extent, the mode conversion characteristic and the noise can be further reduced, and the stability is higher. In addition, the first wire 31 has unequal number of turns distributed in the winding area a and the winding area B, and the second wire 32 has unequal number of turns distributed in the winding area a and the winding area B, which also belongs to the protection scope of the present invention.

A coil component according to embodiment 5 of the present invention will be described with reference to fig. 9. The two sets of the

wire materials

31 and 32 are wound around the winding core 11 and divided into a winding area a and a winding area B in the axial direction of the winding core 1, and also divided into a first half-turn winding area and a second half-turn winding area in the direction perpendicular to the axial direction of the winding core 1. In the winding area A, the winding area of the first half turn is a winding area of plus 0.5 turns and the winding area of the second half turn is a winding area of minus 0.5 turns and half turns. In the winding area B, the front half-turn winding area is a staggered-0.5-turn half-turn winding area, and the rear half-turn winding area is a staggered + 0.5-turn half-turn winding area. The coil component obtained by the winding mode has the advantages that the inner oblique capacitance of each turn between the two groups of

wire rods

31 and 32 can be mutually offset to the maximum extent, the mode conversion characteristic and the noise can be further reduced, and the stability is higher. The first wire 31 and the second wire 32 are distributed with different turns in the winding region a and the winding region B, respectively, and the present invention is also within the scope of the present invention.

According to the coil components of embodiments 3 to 5 of the present invention, other coil components having a combination of multi-segment winding regions can be derived, for example, the number of winding regions can be three or more, and the coil components obtained by combining these winding regions are within the protection scope of the present invention.

Referring to fig. 10 to 13, embodiment 6 of the present invention will be described in detail. The winding state of the single winding layer of the first wire 31 and the second wire 32 in the coil component shown in fig. 10 is schematically shown in fig. 11. In order to clearly distinguish the two sets of

wires

31 and 32, cross-sectional views of the first wire 31 are shaded in fig. 10 and the subsequent drawings. In which portions of the two sets of

wires

In the 6 th embodiment of the present invention, two sets of

wires

31 and 32 are arranged and wound around the drum core winding portion 1 in fig. 11, and the second wire 32 is inserted into the gap formed between the adjacent turns of the first wire 31, thereby forming a single-layer winding region. The first wire 31 is connected to the second outer electrode 22 at the start end, and is wound from the first flange portion 12 side to the second flange portion 13 side on the surface of the winding center portion 11, and the first wire 31 is connected to the third outer electrode 23 at the end, thereby forming a gap array of the first wire 31 on the surface of the winding center portion 11. The two sets of

wires

31 and 32 shown in FIG. 11 are wound around the winding core 11, and there are first and second half turns between each turn of the two sets of

wires

31 and 32 in the direction perpendicular to the axis of the winding core 1. Taking the 2 nd turn of the second wire 32 as an example, the first half turn of the 2 nd turn of the second wire 32 is embedded in the gap between the 2 nd turn and the 3 rd turn of the first wire 31, and the second half turn of the 2 nd turn of the second wire 32 is embedded in the gap between the 1 st turn and the 2 nd turn of the first wire 31 in the same turn of the 2 nd turn of the second wire 32. The starting end of the second wire 32 is connected to the third external electrode 23, and the nth turn of the second wire 32 is inserted into the gap between the nth turn and the (n + 1) th turn of the first wire 31 in the winding region of the first half turn until the 28 th turn is wound. The nth turn of the second wire 32 is inserted into the gap between the (n-1) th turn and the nth turn of the first wire 31 in the winding region of the second half turn until the 28 th turn is wound, and the terminal end of the second wire 32 is connected with the fourth external electrode 24.

Referring to fig. 11 and 13, the influence of the stray capacitance (i.e., the distributed capacitance) of the coil component of the single-layer winding layer on the mode switching characteristic Scd21 is discussed. Fig. 11 is a cross-sectional view of a part of the coil of the two sets of

wires

31 and 32 in a winding state to generate an oblique capacitance, which includes a winding region of the first half turn and a winding region of the second half turn. The first half-turn winding region is a winding region with +1.0 turn and half turn staggered, two groups of

wires

31 and 32 form a single-layer winding layer, specifically, the 1 st turn of the second wire 32 is embedded into a gap between the 1 st turn and the 2 nd turn of the first wire 31, that is, the nth turn of the second wire 32 is embedded into a gap between the nth turn and the n +1 th turn of the first wire 31. The second half turn winding area is a winding area staggered by-1.0 turn and half turn, specifically, the relative positions of the two groups of

wires

31 and 32 are changed, and the 2 nd turn of the second wire 32 is embedded into the gap between the 1 st turn and the 2 nd turn of the first wire 31, namely the nth turn of the second wire 32 is embedded into the gap between the n-1 st turn and the nth turn of the first wire 31. In the first half turn winding region of fig. 12, which is offset by +1.0 turns, the diagonal capacitance Cd4 is shown with a "right-diagonal down" connection direction, and the values of these diagonal capacitances are given a "+" sign. In fig. 13, which shows the second half winding of-1.0 turns, the diagonal capacitance Cd3 is shown with a "right diagonal up" connection direction, and the diagonal capacitances are numbered with a "-" sign. In the case where the distance in the axial direction of the winding center portion 11 between the turns of the first wire 31 and the second wire 32 generating the skew capacitance shown in fig. 12 and 13 is 1.0D (D is the coil wire diameter), the absolute value of the skew capacitance is "2". Referring to fig. 12, it can be seen that the diagonal capacitance Cd4 corresponding to the 2 nd turn of the second wire 32 in the winding area of the first half turn is "+ 2". Referring to fig. 13, the diagonal capacitance Cd3 corresponding to the winding area of the second 2 nd turn of the second wire 32 is "-2". In this way, in the nth turn of the second wire 32, the first half turn and the second half turn of the second wire can cancel each other out. According to the coil component obtained by the winding method, the inner oblique capacitances of the turns between the two groups of

wire rods

31 and 32 in the coil component are mutually offset to the maximum extent, and the coil component also has more stable mode conversion characteristics and noise reduction performance.

Fig. 14 is a diagram illustrating a single-layer winding layer coil component according to embodiment 7 of the present invention. The two sets of

wires

31 and 32 are wound around the winding core 11, and in the first half turn winding region perpendicular to the axial direction of the winding core 1, the 2 nd turn of the second wire 32 is fitted into the gap between the 1 st turn and the 2 nd turn of the first wire 31, that is, the nth turn of the second wire 32 is fitted into the recess between the n-1 st turn and the nth turn of the first wire 31, thereby forming a winding region with a half turn of-1.0 turn being staggered. In the second half turn winding region, the 1 st turn of the second wire 32 is embedded in the gap between the 1 st turn and the 2 nd turn of the first wire 31, that is, the nth turn of the second wire 32 is embedded in the gap between the nth turn and the (n + 1) th turn of the first wire 31, so as to form a winding region with a half turn of +1.0 turn staggered. Taking the 2 nd turn of the second wire 32 as an example, the diagonal capacitance corresponding to the 2 nd turn of the second wire 32 in the winding area of the first half turn staggered by-1.0 turn is "-2", and the diagonal capacitance corresponding to the 2 nd turn of the second wire 32 in the winding area of the second half turn staggered by +1.0 turn is "+ 2", so that the diagonal capacitances corresponding to the whole 2 nd turn of the second wire 32 are mutually offset. By analogy, the inclined capacitance corresponding to the first half turn in the nth turn of the second wire 32 and the inclined capacitance corresponding to the second half turn can be mutually offset. The single-layer winding layer coil component obtained by the winding method can also obtain maximum mutual offset of the inner oblique capacitance of each turn between the two groups of

wire rods

31 and 32, and has more stable mode conversion characteristics and noise reduction performance.

Referring to fig. 15, a single-layer winding layer coil component according to embodiment 8 of the present invention will be described. The two sets of

wires

31 and 32 are wound around the winding core 11 and divided into a winding area a and a winding area B in the axial direction of the winding core, and also divided into a first half-turn winding area and a second half-turn winding area in the direction perpendicular to the axial direction of the winding core 1. In the winding region staggered by the first half turn of-1.0 turn in the winding region a, the 2 nd turn of the second wire 32 is inserted into the gap between the 1 st turn and the 2 nd turn of the first wire 31, that is, the nth turn of the second wire 32 is inserted into the gap between the n-1 st turn and the nth turn of the first wire 31. In the winding region a in which the second half turns of +1.0 turn are staggered, the 1 st turn of the second wire 32 is fitted into the gap between the 1 st turn and the 2 nd turn of the first wire 31, that is, the nth turn of the second wire 32 is fitted into the gap between the nth turn and the n +1 th turn of the first wire 31. In the winding manner described above, the two sets of the

wires

31 and 32 are wound to the 14 th turn in the winding area a. In the winding region of the first half turn shifted by +1.0 turn in the winding region B, the 23 th turn of the second wire is inserted into the gap between the 23 th turn and the 24 th turn of the first wire 31, that is, the nth turn of the second wire 32 is inserted into the gap between the nth turn and the n +1 th turn of the first wire 31. In the winding region of the second half turn shifted by-1.0 turn in the winding region B, the 23 th turn of the second wire 32 is inserted into the gap between the 22 nd turn and the 23 rd turn of the first wire 31, that is, the nth turn of the second wire 32 is inserted into the gap between the n-1 st turn and the nth turn of the first wire 31. In the winding manner described above, the two sets of the

wires

31 and 32 are wound up to the 28 th turn in the winding region B. Similar to the above embodiments of the present invention, the first half turn and the second half turn of the nth turn of the second wire 32 in the winding regions a and B can be offset with each other. In the coil component obtained by the winding method, the inner oblique capacitances of the turns between the two sets of

wire rods

31 and 32 are also cancelled out to the maximum extent, and more stable mode conversion characteristics and noise reduction performance are realized.

wires

31 and 32 in the winding area B is the same, and the number of turns of the first wire 31 in the winding area a is not equal to that of the second wire 32 in the winding area a, and that of turns of the second wire 32 in the winding area B are not equal to that of the first wire, which also belongs to the scope of the present invention. In addition, it is within the scope of the present invention to further derive a coil component having a multi-segment winding region, such as three or more winding regions,

a coil component in which a two-layer winding region and a single-layer winding region coexist according to embodiment 9 of the present invention will be described with reference to fig. 16. The two sets of

wires

31 and 32 are wound around the winding core 11 and divided into a winding area a and a winding area B in the axial direction of the winding core 1, the winding area a is a winding method of a two-layer winding layer, the winding area B is a winding method of a single-layer winding layer, and the winding area B is also divided into a first half-turn winding area and a second half-turn winding area in the axial direction perpendicular to the winding core 1. In the winding region of the first half turn shifted by-0.5 turn in the winding region a, the 2 nd turn of the second wire 32 is fitted into the concave portion between the 1 st turn and the 2 nd turn of the first wire 31, that is, the nth turn of the second wire 32 is fitted into the concave portion between the n-1 st turn and the nth turn of the first wire 31. In the second half winding region shifted by +0.5 turn in the winding region a, the 1 st turn of the second wire 32 is fitted into the recess between the 1 st turn and the 2 nd turn of the first wire 31, that is, the nth turn of the second wire 32 is fitted into the recess between the nth turn and the n +1 th turn of the first wire 31. In the above winding manner, the two sets of

wires

31 and 32 are wound up to the 14 th turn in the winding area a. In the winding region of the first half turn staggered by-1.0 turn in the winding region B, the 16 th turn of the second wire is embedded in the gap between the 15 th turn and the 16 th turn of the first wire 31, that is, the nth turn of the second wire 32 is embedded in the gap between the n-1 th turn and the nth turn of the first wire 31. In the winding region B shifted by the second half of +1.0 turn, the 15 th turn of the second wire 32 is inserted into the gap between the 15 th turn and the 16 th turn of the first wire 31, that is, the nth turn of the second wire 32 is inserted into the gap between the nth turn and the n +1 th turn of the first wire 31. In the above winding manner, the two sets of

wires

31 and 32 are wound up to the 28 th turn in the winding region B. Similar to the above-described embodiments of the present invention, in the winding area a and the winding area B, the first half turn of the nth turn of the second wire 32 corresponds to an oblique capacitance and the second half turn corresponds to an oblique capacitance that cancel each other. In the coil component obtained by the winding method, the inner oblique capacitances of the turns between the two sets of

wire rods

For coil components in which a two-layer winding region is present simultaneously with a single-layer winding region: in the double-layer winding region, the sum of the turns of the first wire 31 and the second wire 32 is equal, and the double-layer winding is carried out for m1 turns; in the winding region of the single-layer winding layer, the sum of the turns of the first wire and the second wire is equal, and the single-layer winding is performed by m2 turns, wherein m1 and m2 are natural numbers, and m1 and m2 have no necessary relation.

It should be noted that, in the winding area a of the embodiment of the present invention, the total number of turns of the two groups of

wires

31 and 32 is the same, in the winding area B of the embodiment, the total number of turns of the two groups of

wires

31 and 32 is the same, and the number of turns of the first wire 31 distributed in the winding area a is not equal to that of the winding area B, and the number of turns of the second wire 32 distributed in the winding area a is not equal to that of the winding area B, which also belongs to the protection scope of the present invention.

A coil component in which a two-layer winding region and a single-layer winding region coexist according to embodiment 10 of the present invention will be described with reference to fig. 17. The two sets of

wire materials

31 and 32 are wound around the winding core portion 11 and divided into a winding area a and a winding area B in the axial direction of the winding core portion 1. The winding area A adopts a winding mode of double winding layers, the winding area B adopts a winding mode of single winding layers, and meanwhile, the winding area A is also divided into a first half-turn winding area and a second half-turn winding area in the direction perpendicular to the axis of the winding core part 1. In the winding region of the first half turn shifted by-0.5 turn in the winding region a, the 2 nd turn of the second wire 32 is fitted into the concave portion between the 1 st turn and the 2 nd turn of the first wire 31, that is, the nth turn of the second wire 32 is fitted into the concave portion between the n-1 st turn and the nth turn of the first wire 31. In the second half winding region shifted by +0.5 turn in the winding region a, the 1 st turn of the second wire 32 is fitted into the recess between the 1 st turn and the 2 nd turn of the first wire 31, that is, the nth turn of the second wire 32 is fitted into the recess between the nth turn and the n +1 th turn of the first wire 31. In the above winding manner, the two sets of

wires

31 and 32 are wound up to the 14 th turn in the winding area a. In the winding region B staggered by the first half turn of +1.0 turn, the 15 th turn of the second wire is inserted into the gap between the 15 th turn and the 16 th turn of the first wire 31, that is, the nth turn of the second wire 32 is inserted into the gap between the nth turn and the n +1 th turn of the first wire 31. In the winding region of the latter half staggered by-1.0 turn in the winding region B, the 16 th turn of the second wire 32 is inserted into the gap between the 15 th turn and the 16 th turn of the first wire 31, that is, the nth turn of the second wire 32 is inserted into the gap between the n-1 th turn and the nth turn of the first wire 31. In the above winding manner, the two sets of

wires

wire materials

wires

31 and 32 in the winding area B is the same, and the number of turns of the first wire 31 distributed in the winding area a is not equal to that of the second wire 32 distributed in the winding area a is not equal to that of the winding area B.

A coil component in which a two-layer winding region and a single-layer winding region coexist according to embodiment 11 of the present invention will be described with reference to fig. 18. The two sets of

wire materials

31 and 32 are wound around the winding core portion 11 and divided into a winding area a and a winding area B in the axial direction of the winding core portion 1. The winding area A adopts a winding mode of double winding layers. The winding area B adopts a single-layer winding mode. The winding core 1 is also divided into a first half-turn winding region and a second half-turn winding region in the direction perpendicular to the axis. In the first half turn winding region shifted by +0.5 turns in the winding region a, the 1 st turn of the second wire 32 is fitted into the recess between the 1 st turn and the 2 nd turn of the first wire 31, that is, the nth turn of the second wire 32 is fitted into the recess between the nth turn and the n +1 th turn of the first wire 31. In the winding region of the second half shifted by-0.5 turn in the winding region a, the 2 nd turn of the second wire 32 is fitted into the concave portion between the 1 st turn and the 2 nd turn of the first wire 31, that is, the n-th turn of the second wire 32 is fitted into the concave portion between the n-1 st turn and the n-th turn of the first wire 31. In the above winding manner, the two sets of

wires

wire materials

wires

A coil component in which a two-layer winding region and a single-layer winding region coexist according to embodiment 12 of the present invention will be described with reference to fig. 19. The two sets of

wire materials

31 and 32 are wound around the winding core portion 11 and divided into a winding area a and a winding area B in the axial direction of the winding core portion 1. The winding area A adopts a winding mode of double winding layers. The winding area B adopts a single-layer winding mode. The winding core is also divided into a first half-turn winding area and a second half-turn winding area in the direction perpendicular to the axis of the winding core 1. In the first half turn winding region shifted by +0.5 turns in the winding region a, the 1 st turn of the second wire 32 is fitted into the recess between the 1 st turn and the 2 nd turn of the first wire 31, that is, the nth turn of the second wire 32 is fitted into the recess between the nth turn and the n +1 th turn of the first wire 31. In the winding region of the second half shifted by-0.5 turn in the winding region a, the 2 nd turn of the second wire 32 is fitted into the concave portion between the 1 st turn and the 2 nd turn of the first wire 31, that is, the n-th turn of the second wire 32 is fitted into the concave portion between the n-1 st turn and the n-th turn of the first wire 31. In the above winding manner, the two sets of

wires

31 and 32 are wound up to the 14 th turn in the winding area a. In the winding region of the first half turn shifted by +1.0 in the winding region B, the 15 th turn of the second wire is inserted into the gap between the 15 th turn and the 16 th turn of the first wire 31, that is, the nth turn of the second wire 32 is inserted into the gap between the nth turn and the n +1 th turn of the first wire 31. In the winding region of the latter half staggered by-1.0 turn in the winding region B, the 16 th turn of the second wire 32 is inserted into the gap between the 15 th turn and the 16 th turn of the first wire 31, that is, the nth turn of the second wire 32 is inserted into the gap between the n-1 th turn and the nth turn of the first wire 31. In the above winding manner, the two sets of

wires

31 and 32 are wound up to the 28 th turn in the winding region B. As in the above-described embodiments of the present invention, in the winding region a and the winding region B, the first half turn of the nth turn of the second wire 32 corresponds to an oblique capacitance and the second half turn corresponds to an oblique capacitance, which are offset from each other. In the coil component obtained by the winding method, the inner oblique capacitances of the turns between the two sets of

wire materials

wires

A coil component in which a two-layer winding region and a single-layer winding region coexist according to embodiment 13 of the present invention will be described with reference to fig. 20. The two sets of the

wire materials

31 and 32 are wound around the winding core portion 11 and divided into three winding regions, i.e., a winding region a, a winding region B, and a winding region C, in the axial direction of the winding core portion 1. The winding area A and the winding area C adopt a winding mode of double winding layers. The winding area B adopts a single-layer winding mode. The winding core 1 is also divided into a first half-turn winding region and a second half-turn winding region in the direction perpendicular to the axis. In the 13 th embodiment of the present invention, the inclined capacitances in the turns between the two sets of

wires

31 and 32 can also be mutually offset to the greatest extent, so as to realize more stable mode conversion characteristics and noise reduction performance.

According to the coil parts of embodiments 9 to 13 of the present invention, other coil parts having multi-segment winding regions can be further derived, for example, the number of the winding regions is three or more, which falls within the protection scope of the present invention.

The present invention will be described below with reference to experiments.

The coil component shown in FIG. 21 is compared with the coil component of example 1 shown in FIG. 2. Differences between the comparative scheme and example 1 include: as mentioned above, embodiment 1 includes a winding area of the first half turn which is a winding area of the +0.5 half turn and a winding area of the second half turn which is a winding area of the-0.5 half turn; the comparison scheme does not divide the first half turn and the second half turn, and the first wire and the second wire in the whole winding area are staggered by +0.5 turn. In the experiment, signals of the same frequency, from 0.1MHz to 1000MHz, were inputted to the coil parts of the comparative example and example 1, and the loss of the signals was measured by a measuring instrument. In fig. 22, the dotted line represents the experimental result of the comparative scheme, and the solid line represents the experimental result of the 1 st embodiment, it can be seen that the signal loss of the 1 st embodiment is significantly lower than that of the comparative scheme, that is, the mode switching characteristic Scd21 of the 1 st embodiment, in the range of 10MHz to 1000MHz, wherein the signal loss of the 1 st embodiment is between-70 dB to-35 dB. Especially in the range of 10MHz to 200MHz, it is more apparent that the signal loss of example 1 is lower than that of the comparative scheme. The reason for this is that the skew capacitance in the same turn of the two groups of wires of embodiment 1 can be effectively offset, and the imbalance of the skew capacitance in the coil component can be minimized.

The coil component shown in FIG. 23 is used as a 2 nd comparison means, and is compared with the coil component of the 1 st embodiment shown in FIG. 2. Differences between the 2 nd comparative scheme and the 1 st example include: as mentioned above, embodiment 1 includes a winding area of the first half turn which is a winding area of the +0.5 half turn and a winding area of the second half turn which is a winding area of the-0.5 half turn; the 2 nd comparison scheme includes four winding regions (winding regions A, B, C, D), winding region a being a region staggered by-0.5 turns, winding region B being a region staggered by +1.5 turns, winding region C being a region staggered by-1.5 turns, winding region D being a region staggered by +0.5 turns, a switching region E for transferring the wire material being present between winding region a and winding region B, a switching region F for transferring the wire material being present between winding region B and winding region C, a switching region G for transferring the wire material being present between winding region C and winding region D, the skew capacitances of winding region a and winding region D cancel each other, and the skew capacitances of winding region B and winding region C cancel each other. In the experiment, signals of the same frequency, from 0.1MHz to 1000MHz, were inputted to the coil parts of comparative example 2 and example 1, and the loss of the signals was measured by a measuring instrument. In fig. 24, the dotted line represents the experimental result of the 2 nd comparison scheme, and the solid line represents the experimental result of the 1 st embodiment, it can be seen that the signal loss of the 1 st embodiment is significantly lower than that of the 2 nd comparison scheme, that is, the mode switching characteristic Scd21 of the 1 st embodiment, in the range of 10MHz to 600MHz, wherein the signal loss of the 1 st embodiment is between-70 dB to-40 dB. The reason for this is that the skew capacitance in the same turn of the two groups of wires of embodiment 1 can be effectively offset, and the imbalance of the skew capacitance in the coil component can be minimized.

The results of comparison of other examples of the present invention with the comparative example and comparative example 2 are the same as those described above, and the description thereof is omitted.

However, the embodiment of the present invention is not limited to the above-described configuration, and the configuration having the opposite direction of the number of turns in the illustrated embodiment is substantially the same configuration, and therefore, the related illustration is omitted.

The foregoing is a more detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to those descriptions. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the invention, and these substitutions and modifications should be considered to fall within the scope of the invention.

Claims

1. A coil component is characterized by comprising:

there is at least one double layer winding region and/or at least one single layer winding region; in one of the two-layer winding regions or one of the single-layer winding regions, the sum of the number of turns of the first wire and the second wire is equal;

2. The coil component of claim 1, wherein: the winding area of the winding layer is wound in a multi-section type side by side mode.

3. The coil component of claim 1, wherein: the first wire and the second wire are wound on the winding center portion in a double-wire form.

4. The coil component of claim 1, wherein: the sum of the turns of the first wire in the winding area of each winding layer is equal to or different from the sum of the turns of the second wire in the winding area of each winding layer by 1 to 3 turns.

5. The coil component according to any one of claims 1 to 4, wherein: the number of winding areas of the winding layers is more than three; the sum of the turns between the winding areas of different winding layers is equal or different by p turns, wherein p is a natural number.

6. A method of manufacturing a coil component, characterized in that the coil component includes a winding core portion including a winding center portion having a first flange portion and a second flange portion at both ends, respectively, a first external electrode and a second external electrode provided on the first flange portion and the second flange portion, respectively, a third external electrode and a fourth external electrode provided on the first flange portion and the second flange portion, respectively; the manufacturing method comprises the following steps:

inserting the second wire into a recess or gap between adjacent turns of the first wire such that there is at least one double layer winding area and/or at least one single layer winding area of the coil component; making the sum of the number of turns of the first wire and the second wire equal to or different by 1 to 3 turns in one of the two-layer winding regions or one of the single-layer winding regions;

7. The manufacturing method according to claim 6, characterized in that: and winding the winding area of the winding layer in a multi-section type side-by-side winding mode.

8. The manufacturing method according to claim 6, characterized in that: and winding the first wire and the second wire on the winding center part in a double-wire mode.

9. The manufacturing method according to claim 6, characterized in that: and making the sum of the turns of the first wire in the winding area of each winding layer equal to or different from the sum of the turns of the second wire in the winding area of each winding layer by 1-3 turns.

10. The manufacturing method according to any one of claims 6 to 9, characterized in that: the number of winding areas of the winding layers is more than three; the sum of the number of turns between winding areas of different winding layers is equal or different by p turns, wherein p is a natural number.