Three-phase four-wire differential and common mode integrated inductor

Abstract

The utility model discloses a three-phase four-wire differential common mode integrated inductor, including: a magnet, a first winding, a second winding, a third winding and a fourth winding, the magnet includes a first magnetic core and a second magnetic core, the first magnetic core is provided with two first winding arms, the outer diameter R3 of the two first winding arms is less than or equal to the inner diameter r1 of the first winding and the second winding, and the outer diameter r2 of the second winding is less than or equal to the inner diameter r3 of the third winding. The two first winding arms are sleeved with the first winding and the second winding respectively, a first opening is formed between the two first winding arms, and the distance d1 of the first opening is larger than the outer diameter R1 of the first winding and the outer diameter R1 of the second winding; the second magnetic core is provided with two second winding arms, the outer diameter R4 of the two second winding arms is smaller than or equal to the inner diameter r2 of the third winding and the inner diameter r2 of the fourth winding, the second winding arms are sleeved with the third winding and the fourth winding respectively, a second opening is formed between the two second winding arms, and the distance d2 of the second opening is larger than the outer diameter R2 of the third winding and the outer diameter R2 of the fourth winding. The first opening and the second opening are oppositely arranged, so that the first magnetic core and the second magnetic core form a closed loop.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of inductor, specifically, relate to a three phase four line difference common mode integrated inductor. BACKGROUND

[0002] Because of the need of people's work and life, the demand for power electronic equipment is also more and more. However, almost all power supply circuits will produce common mode and differential mode electromagnetic interference signals, and the power supply circuit is usually connected with common mode filter inductor and differential mode filter inductor to reduce or suppress common mode and differential mode interference signals, so that the power supply circuit meets the requirement of electromagnetic compatibility.

[0003] The three phase four line difference common mode integrated inductor in the prior art, four windings are wound on the integrated magnetic core, when the current in the circuit increases, the winding wire diameter needs to be increased, if the winding wire diameter is very thick and has high hardness, it is very laborious to wind the winding by hand, and it is easy to scratch the magnetic core and cause loss by directly winding the magnetic core by machine. UTILITY MODEL CONTENTS

[0004] In view of the deficiency of the prior art, the utility model provides a three phase four line difference common mode integrated inductor.

[0005] The utility model discloses a three phase four line difference common mode integrated inductor, including: magnet, first winding, second winding, third winding and fourth winding, first magnetic core has two first winding arms, and the first opening is formed between the two first winding arms, and the distance d1 of the first opening is greater than the outer diameter R1 of the first winding and the second winding, second magnetic core has two second winding arms, and the second opening is formed between the two second winding arms, and the distance d2 of the second opening is greater than the outer diameter R2 of the third winding and the fourth winding, and the first opening and the second opening are placed oppositely to form a closed loop with the first magnetic core and the second magnetic core. The two first winding arms of the first magnetic core are respectively wound with the first winding and the second winding, and the outer diameter R3 of the first winding arm is less than or equal to the inner diameter r1 of the first winding and the second winding, and the two ends of the first winding are provided with two first pins, and the two ends of the second winding are provided with two second pins. The two second winding arms of the second magnetic core are respectively wound with the third winding and the fourth winding, and the outer diameter R4 of the second winding arm is less than or equal to the inner diameter r2 of the third winding and the fourth winding, and the two ends of the third winding are provided with two third pins, and the two ends of the fourth winding are provided with two fourth pins.

[0006] Preferably, the first magnetic core and the second magnetic core are shaped like a square, a circle, a U or a semicircle.

[0007] Preferably, it further includes a magnetic conductive sheet, the magnetic conductive sheet is arranged between the first magnetic core and the second magnetic core, and the two ends of the magnetic conductive sheet face the junction of the two first winding arms and the two second winding arms, and are in magnetic conduction with the first magnetic core and the second magnetic core.

[0008] Preferably, the three-phase four-wire differential common-mode integrated inductor further comprises a plurality of protective sleeves, each of the two first winding arms of the first magnetic core and the two second winding arms of the second magnetic core is sleeved with a protective sleeve, and each of the first winding, the second winding, the third winding and the fourth winding is wound on the corresponding protective sleeve.

[0009] Preferably, the protective sleeve comprises a first sleeve body and a second sleeve body, the first sleeve body comprises a first tube body and a first protective wall, one end of the first tube body is fixedly connected with the first protective wall, the second sleeve body comprises a second tube body and a second protective wall, one end of the second tube body is fixedly connected with the second protective wall, and the other end of the first tube body away from the first protective wall is embedded with the other end of the second tube body away from the second protective wall, and each of the first winding, the second winding, the third winding and the fourth winding is wound between the embedded first tube body and the second tube body.

[0010] Preferably, the first winding, the second winding, the third winding and the fourth winding are flat wire coils.

[0011] Preferably, the three-phase four-wire differential common-mode integrated inductor further comprises a bottom plate, a plurality of pin holes are formed in the bottom plate, and the first pin, the second pin, the third pin and the fourth pin are respectively arranged in the corresponding pin holes.

[0012] Preferably, the three-phase four-wire differential common-mode integrated inductor further comprises an insulating tape, and the middle parts of the first magnetic core and the second magnetic core are respectively wrapped with the insulating tape.

[0013] The three-phase four-wire differential common-mode integrated inductor has the following advantages compared with the prior art: the first magnetic core and the second magnetic core are designed in a split combination, the distance d1 of the first opening is greater than the outer diameter R1 of the first winding and the second winding, the distance d2 of the second opening is greater than the outer diameter R2 of the third winding and the fourth winding, and the outer diameter R3 of the first winding arm is less than or equal to the inner diameter r1 of the first winding and the second winding, so that the first winding and the second winding can be sleeved into the first winding arm; the outer diameter R4 of the other two second winding arms is less than or equal to the inner diameter r2 of the third winding and the fourth winding, so that the third winding and the fourth winding can be directly sleeved into the second winding arm. When the first winding, the second winding, the third winding and the fourth winding need to be wound with very thick wire, the first winding, the second winding, the third winding and the fourth winding can be wound by mechanical automation first, and then sleeved into the first winding arm and the second winding arm, respectively, so that the operation is simple, manual winding of the first winding, the second winding, the third winding and the fourth winding is not necessary, and the first magnetic core and the second magnetic core are not directly placed on the machine to wind the first winding, the second winding, the third winding and the fourth winding, so that the first magnetic core and the second magnetic core are not easily scratched and damaged. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0015] Figure 1 is a perspective view of a three-phase four-wire differential common-mode integrated inductor;

[0016] Figure 2 is an exploded view of a three-phase four-wire differential common-mode integrated inductor;

[0017] Figure 3 is a schematic view of a magnet of a three-phase four-wire differential common-mode integrated inductor;

[0018] Figure 4 is an exploded view of a magnet of a three-phase four-wire differential common-mode integrated inductor;

[0019] Figure 5 is a perspective view of four windings of a three-phase four-wire differential common-mode integrated inductor;

[0020] Figure 6 is a schematic view of four windings of a three-phase four-wire differential common-mode integrated inductor;

[0021] Figure 7 is a schematic view of a protective sleeve of a three-phase four-wire differential common-mode integrated inductor.

[0022] Reference Signs

[0023] 1, magnet; 11, first magnetic core; 111, first winding arm; 112, first opening; 12, second magnetic core; 121, second winding arm; 122, second opening;

[0024] 2, first winding; 21, first pin; 3, second winding; 31, second pin; 4, third winding; 41, third pin; 5, fourth winding; 51, fourth pin;

[0025] 6, magnetic conducting sheet;

[0026] 7, protective sleeve; 71, first sleeve body; 711, first tube body; 712, first protective wall; 72, second sleeve body; 721, second tube body; 722, second protective wall;

[0027] 8, bottom plate; 81, pin hole;

[0028] 9, insulating tape. DETAILED DESCRIPTION

[0029] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0030] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] Please see Figure 1 and Figure 2 As shown, Figure 1 This is a 3D diagram of a three-phase, four-wire differential and common-mode integrated inductor. Figure 2 This is an exploded view of a three-phase four-wire differential common-mode integrated inductor. This utility model discloses a three-phase four-wire differential common-mode integrated inductor, including a magnet 1, a first winding 2, a second winding 3, a third winding 4, and a fourth winding 5. The first winding 2, the second winding 3, the third winding 4, and the fourth winding 5 are wound in pairs on the opposite long sides of the magnet 1.

[0032] Please see Figure 3 and Figure 4 As shown, Figure 3 This is a schematic diagram of the magnet of a three-phase four-wire differential common-mode integrated inductor. Figure 4It is the explosion drawing of the magnet of three-phase four-wire differential common-mode integrated inductor. In the embodiment, the magnet 1 comprises a first magnetic core 11 and a second magnetic core 12. The first magnetic core 11 comprises two first winding arms 111, and a first opening 112 is formed between the two first winding arms 111 with a spacing. The distance d1 of the first opening 112 is greater than the outer diameter R1 of the first winding 2 and the second winding 3. The outer diameter R3 of the two first winding arms 111 is less than or equal to the inner diameter r1 of the first winding 2 and the second winding 3, and the two first winding arms 111 are respectively sleeved by the first winding 2 and the second winding 3. The second magnetic core 12 comprises two second winding arms 121, and a second opening 122 is formed between the two second winding arms 121 with a spacing. The distance d2 of the second opening 122 is greater than the outer diameter R2 of the third winding 4 and the fourth winding 5. The outer diameter R4 of the two second winding arms 121 is less than or equal to the inner diameter r2 of the third winding 4 and the fourth winding 5, and the two second winding arms 121 are respectively wound by the third winding 4 and the fourth winding 5. The first opening 112 and the second opening 122 are oppositely placed, and the two first winding arms 111 and the two second winding arms 121 are oppositely connected, that is, the first magnetic core 11 and the second magnetic core 12 are connected to form a closed loop.

[0033] Please refer to Figure 5 and Figure 6 shown, Figure 5 it is the four winding schematic diagram of three-phase four-wire differential common-mode integrated inductor, Figure 6 It is the four winding schematic diagram of three-phase four-wire differential common-mode integrated inductor. In the embodiment, the two ends of the first winding 2 extend to form two first pins 21. The two ends of the second winding 3 extend to form two second pins 31. The two ends of the third winding 4 extend to form two third pins 41. The two ends of the fourth winding 5 extend to form two fourth pins 51.

[0034] In practical application, the two first winding arms 111 of the first magnetic core 11 are respectively wound with the first winding 2 and the second winding 3, the two second winding arms 121 of the second magnetic core 12 are respectively wound with the third winding 4 and the fourth winding 5, the first opening 112 and the second opening 122 are oppositely placed and the first winding arm 111 and the second winding arm 121 are connected, the first magnetic core 11 and the second magnetic core 12 form a closed loop, the first pin 21, the second pin 31 and the third pin 41 correspond to three live wires, and the fourth pin 51 corresponds to a zero line, so that a common mode inductance is generated when an input current is input. There is magnetic flux leakage between the first winding 2, the second winding 3, the third winding 4 and the fourth winding 5, forming a differential mode inductance. Through the split design of the first magnetic core 11 and the second magnetic core 12, the distance d1 of the first opening 112 is greater than the outer diameter R1 of the first winding 2 and the second winding 3, and the inner diameter r1 of the first winding 2 and the second winding 3 is greater than or equal to the outer diameter R3 of the first winding arm 111, so that the first winding 2 and the second winding 3 can be sleeved into the first winding arm 111; the distance d2 of the second opening 122 is greater than the outer diameter R2 of the third winding 4 and the fourth winding 5, and the outer diameter R4 of the two second winding arms 121 is less than the inner diameter r2 of the third winding 4 and the fourth winding 5, so that the third winding 4 and the fourth winding 5 can be directly sleeved into the second winding arm 121. When the first winding 2, the second winding 3, the third winding 4 and the fourth winding 5 need to be wound with very thick wire diameter, mechanical automation can be used to wind the first winding 2, the second winding 3, the third winding 4 and the fourth winding 5 first, and then they are sleeved into the first winding arm 111 and the second winding arm 121 respectively, which is simple to operate and does not need to manually and laboriously wind the first winding 2, the second winding 3, the third winding 4 and the fourth winding 5, and also avoids scratching the first magnetic core 11 and the second magnetic core 12 when directly placing the first magnetic core 11 and the second magnetic core 12 on the machine to wind the first winding 2, the second winding 3, the third winding 4 and the fourth winding 5, which causes loss.

[0035] In the embodiment, the magnet 1 is made of high-conductivity ferrite, and can also be made of iron powder core material, flexible magnetic core material, etc. The cross-sectional area of the first magnetic core 11 and the second magnetic core 12 at both ends can be adjusted, and the cross-sectional area is increased to increase the anti-saturation current.

[0036] In the example, further, the first winding 2, the second winding 3, the third winding 4 and the fourth winding 5 have the same number of turns and are symmetrically distributed, so that when the first winding 2, the second winding 3, the third winding 4 and the fourth winding 5 have the same number of turns, the magnetic field coupling can be reduced, thereby reducing electromagnetic interference; and when the first winding 2, the second winding 3, the third winding 4 and the fourth winding 5 form a symmetric distribution, the magnetic field is balanced, the stability of operation is ensured, and energy loss is reduced.

[0037] Further, in the embodiment, the first magnetic core 11 and the second magnetic core 12 are in the shape of a U, and the first opening 112 of the first magnetic core 11 and the second opening 122 of the second magnetic core 12 are oppositely arranged to form a rectangular shape. In addition, the first magnetic core 11 and the second magnetic core 12 can be in the shape of a C, a U, or a semicircle.

[0038] When the two first winding arms 111 are parallel and form a symmetrical structure, and the two second winding arms 121 are parallel and form a symmetrical structure, the first winding and the second winding wound on the two first winding arms 111 can form a parallel symmetrical structure, and the third winding 4 and the fourth winding 5 wound on the two second winding arms 121 can also form a parallel symmetrical structure. The first magnetic core 11 and the second magnetic core 12 are oppositely arranged to form a closed loop. At this time, the magnetic field distribution is most balanced, which ensures stable operation and reduces energy loss. Further, the first magnetic core 11 and the second magnetic core 12 are preferably in the shape of a U.

[0039] Further, the three-phase four-wire differential common-mode integrated inductor further comprises a magnetic conducting sheet 6, which is arranged on the magnet 1 and has two ends facing the joint of the two first winding arms 111 and the second winding arms 121 and being in magnetic conduction with the first magnetic core 11 and the second magnetic core 12. In the embodiment, when current flows in, the magnetic conducting sheet 6 is arranged in the middle of the joint of the two first winding arms 111 and the second winding arms 121, and the magnetic conducting sheet 6 is in magnetic conduction with the first magnetic core 11 and the second magnetic core 12, thereby increasing the leakage magnetic generated between the first winding 2, the second winding 3, the third winding 4, and the fourth winding 5 and forming leakage inductance, so as to realize a larger differential-mode inductance and reduce the cost. This structure is simple and can better meet the market use demand.

[0040] Specifically, the magnetic conducting sheet 6 is made of commonly used ferrosilicon material, has the characteristics of high melting point, strong corrosion resistance, magnetism, good electrical conductivity, excellent mechanical properties, etc., and can also use ferrosilicon aluminum material. The size of the magnetic conducting sheet 4 can be adjusted to adjust the size of the differential-mode inductance.

[0041] Further, referring to Figure 2 In the embodiment, the three-phase four-wire differential common-mode integrated inductor further comprises a plurality of protective sleeves 7, and the two first winding arms 111 of the first magnetic core 11 and the two second winding arms 121 of the second magnetic core 12 are respectively sleeved with one protective sleeve 7, that is, the first winding 2, the second winding 3, the third winding 4, and the fourth winding 5 are respectively wound on one protective sleeve 7.

[0042] Please refer to Figure 7 As shown in the figure, Figure 7The protective sleeve of the three-phase four-wire differential common-mode integrated inductor is shown in the schematic diagram. In the embodiment, the protective sleeve 7 comprises a first sleeve body 71 and a second sleeve body 72. The first sleeve body 71 comprises a first pipe body 711 and a first protective wall 712, and one end of the first pipe body 711 is fixedly connected with the first protective wall 712. The second sleeve body 72 comprises a second pipe body 721 and a second protective wall 722, and one end of the second pipe body 721 is fixedly connected with the second protective wall 722. The other end of the first pipe body 711 away from the first protective wall 712 is in abutment and fitting with the other end of the second pipe body 721 away from the second protective wall 722. The first winding 2, the second winding 3, the third winding 4 and the fourth winding 5 are respectively wound between the corresponding first protective wall 712 and the second protective wall 722 and can be sleeved into the first winding arm 111 of the first magnetic core 11 and the second winding arm 121 of the second magnetic core 12.

[0043] The first pipe body 711 is a common two-end opening pipe, the first protective wall 712 is a square and hollow in the middle, the hollow shape is consistent with the opening shape of the first pipe body 711, and one end of the first pipe body 711 is adaptively connected with the hollow part of the first protective wall 712. In order to prevent the first winding 2 and the second winding 3 from falling off from the first pipe body 711, the area of the first protective wall 712 is greater than or equal to the cross-sectional area of the first winding 2, the second winding 3, the third winding 4 and the fourth winding 5 along the winding direction.

[0044] Similarly, the second pipe body 721 is a common two-end opening pipe, the second protective wall 722 is a square and hollow in the middle, the hollow shape is consistent with the opening shape of the second pipe body 721, and one end of the second pipe body 721 is adaptively connected with the hollow part of the second protective wall 722. In order to prevent the first winding 2 and the second winding 3 from falling off from the second pipe body 721, the area of the second protective wall 722 is greater than or equal to the cross-sectional area of the first winding 2, the second winding 3, the third winding 4 and the fourth winding 5 along the winding direction.

[0045] That is, one end of the first pipe body 711 is adaptively and fixedly connected with the hollow part of the first protective wall 712, one end of the second pipe body 721 is adaptively and fixedly connected with the hollow part of the second protective wall 722, and the other end of the first pipe body 711 away from the first protective wall 712 is in abutment and fitting with the other end of the second pipe body 721 away from the second protective wall 722.

[0046] Specifically, the protective sleeve 7 is made of common plastic material, and can also be made of glass fiber, rubber, asbestos, mica and other insulating materials. The protective sleeve 7 is sleeved on the first winding arm 111 of the first magnetic core 11 and the second winding arm 121 of the second magnetic core 12, respectively, and the first winding 2, the second winding 3, the third winding 4 and the fourth winding 5 are wound on the protective sleeve 7, so that the magnet 1 is not in direct contact with the first winding 2, the second winding 3, the third winding 4 and the fourth winding 5. There is a layer of insulation protection of the protective sleeve 7 to prevent safety problems caused by current leakage.

[0047] Further, in the embodiment, the first winding 2, the second winding 3, the third winding 4 and the fourth winding 5 are all flat wire coils made of copper strips, which have the characteristics of good electrical conductivity, heat resistance, corrosion resistance, strong ductility, high mechanical strength, etc. In addition, one of enameled copper wire, enameled aluminum wire or flat aluminum wire can also be used.

[0048] Further, referring to Figure 2 As shown, the three-phase four-wire differential common-mode integrated inductor further includes a bottom plate 8, and a plurality of pin holes 81 are formed in the bottom plate 8, and the positions of the pin holes 81 correspond to the first pin 21, the second pin 31, the third pin 41 and the fourth pin 51. The magnet 1 is fixed on the bottom plate, and the first pin 21, the second pin 31, the third pin 41 and the fourth pin 51 can pass through the pin holes 81 and be fixed on the bottom plate 8. In the embodiment, the bottom plate 8 is square in shape and is made of plastic material, and can also be made of glass fiber, rubber, asbestos, mica and other insulating materials.

[0049] Further, in the embodiment, the three-phase four-wire differential common-mode integrated inductor further includes an insulating tape 9, which is wound around the middle part of the first magnetic core 11 and the second magnetic core 12. When a large current flows, the first winding 2, the second winding 3, the third winding 4 and the fourth winding 5 are prone to have pinholes on the surface, which can cause the magnet 1 to arc, generate high temperature and discharge sparks, etc., which can cause safety problems. Winding the insulating tape 9 can play an insulating role to prevent short circuit and electric shock.

[0050] In actual application, when current flows in, the middle part of the first magnetic core 11 is wound with the insulating tape 9, and the two first winding arms 111 are respectively sleeved with a protective sleeve 7, and the two protective sleeves 7 are respectively wound with the first winding 2 and the second winding 3; the middle part of the second magnetic core 12 is wound with the insulating tape 9, and the two second winding arms 121 are respectively sleeved with a protective sleeve 7, and the two protective sleeves 7 are respectively wound with the third winding 4 and the fourth winding 5. The first opening 112 and the second opening 121 are oppositely placed, and the first winding arm 111 and the second winding arm 121 are connected, to generate a common-mode inductor, and the insulating tape 9 and the protective sleeve 7 play an insulating protection role to prevent safety problems caused by current leakage.

[0051] By setting the magnetic conductive sheet 6 at the joint of the first winding arm 111 and the second winding arm 121, and making the magnetic conductive sheet 6 magnetically conductive with the magnet 1, the leakage magnetic between the first winding 2, the second winding 3, the third winding 4 and the fourth winding 5 is increased, so that a larger differential mode inductance is realized, the structure is simple and automatic production can be realized, and the material and size of the magnetic conductive sheet 6 can be adjusted to adjust the size of the differential mode inductance. The first winding 2, the second winding 3, the third winding 4 and the fourth winding 5 are exposed, heat conduction is fast, and heat dissipation efficiency is high, and the first pin 21, the second pin 31, the third pin 41 and the fourth pin 51 can pass through the pin hole 81 and be fixed on the bottom plate 8, so that the whole is stable.

[0052] The above only describes the embodiments of the present application and is not used to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A three-phase four-wire differential common-mode integrated inductor, characterized in that, The application relates to a magnet (1), a first winding (2), a second winding (3), a third winding (4) and a fourth winding (5), wherein the magnet (1) comprises a first magnetic core (11) and a second magnetic core (12), the first magnetic core (11) has two first winding arms (111), a first opening (112) is formed between the two first winding arms (111), the distance d1 of the first opening (112) is greater than the outer diameter R1 of the first winding (2) and the second winding (3), the second magnetic core (12) has two second winding arms (121), a second opening (122) is formed between the two second winding arms (121), the distance d2 of the second opening (122) is greater than the outer diameter R2 of the third winding (4) and the fourth winding (5), the first opening (112) and the second opening (122) are oppositely arranged so that the first magnetic core (11) and the second magnetic core (12) form a closed loop, the two first winding arms (111) of the first magnetic core (11) are respectively provided with the first winding (2) and the second winding (3), and the outer diameter R3 of the first winding arm (111) is less than or equal to the inner diameter r1 of the first winding (2) and the second winding (3), the two ends of the first winding (2) are provided with two first pins (21), the two ends of the second winding (3) are provided with two second pins (31), the two second winding arms (121) of the second magnetic core (12) are respectively provided with the third winding (4) and the fourth winding (5), and the outer diameter R4 of the second winding arm (121) is less than or equal to the inner diameter r2 of the third winding (4) and the fourth winding (5), the two ends of the third winding (4) are provided with two third pins (41), and the two ends of the fourth winding (5) are provided with two fourth pins (51). The first magnetic core (11) and the second magnetic core (12) are in the shapes of a square, a C, a U or a semicircle.

2. The three-phase four-wire differential common-mode integrated inductor of claim 1, wherein, The application further comprises a magnetic conductive sheet (6), which is arranged between the first magnetic core (11) and the second magnetic core (12), and the two ends of the magnetic conductive sheet (6) are directed towards the positions where the two first winding arms (111) and the two second winding arms (121) meet, and the magnetic conductive sheet (6) is in magnetic conduction with the first magnetic core (11) and the second magnetic core (12).

3. The three-phase four-wire differential common-mode integrated inductor according to any one of claims 1-2, characterized in that, The application further comprises a plurality of protective sleeves (7), each of the two first winding arms (111) of the first magnetic core (11) and the two second winding arms (121) of the second magnetic core (12) is provided with a protective sleeve (7), and the first winding (2), the second winding (3), the third winding (4) and the fourth winding (5) are respectively arranged on the corresponding protective sleeves (7).

4. The three-phase four-wire differential common-mode integrated inductor of claim 1, wherein, ​ 5. The three-phase four-wire differential common-mode integrated inductor of claim 4, wherein, The protective sleeve (7) comprises a first sleeve body (71) and a second sleeve body (72), the first sleeve body (71) comprises a first tube body (711) and a first protective wall (712), one end of the first tube body (711) is fixedly connected with the first protective wall (712), the second sleeve body (72) comprises a second tube body (721) and a second protective wall (722), one end of the second tube body (721) is fixedly connected with the second protective wall (722), the other end of the first tube body (711) away from the first protective wall (712) is embedded with the other end of the second tube body (721) away from the second protective wall (722); the first winding (2), the second winding (3), the third winding (4) and the fourth winding (5) are respectively wound between the embedded first tube body (711) and the second tube body (721).

6. The three-phase four-wire differential common-mode integrated inductor of claim 5, wherein, The first winding (2), the second winding (3), the third winding (4) and the fourth winding (5) are flat wire coils.

7. The three-phase four-wire differential common-mode integrated inductor of claim 6, wherein, A bottom plate (8) is further included, a plurality of pin holes (81) are formed on the bottom plate (8), the first pin (21), the second pin (31), the third pin (41) and the fourth pin (51) are respectively arranged in the corresponding pin holes (81).

8. The three-phase four-wire differential common-mode integrated inductor of claim 7, wherein, Insulating tapes (9) are further included, the middle parts of the first magnetic core (11) and the second magnetic core (12) are respectively wound with the insulating tapes (9).

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