Combined single-phase large-current flat wire vertical winding differential and common mode integrated inductor

Abstract

The utility model belongs to the technical field of electronic components, and discloses a combined type single-phase large-current flat wire vertically-wound differential-mode and common-mode integrated inductor which comprises a mounting base, a common-mode magnetic core, a differential-mode magnetic core, a winding coil and an insulating partition plate, the common-mode magnetic core is arranged on the upper portion of the mounting base, and the differential-mode magnetic core is arranged on the lower portion of the mounting base. The differential-mode magnetic cores are arranged at the two ends of the upper top face of the common-mode magnetic core, the winding coils are wound around the differential-mode magnetic cores and the common-mode magnetic core at the two ends and share the winding coils, pins at the two ends of the winding coils at the two ends are inserted into the mounting base, and pins at the two ends of the common-mode magnetic core are inserted into the mounting base. And an insulating partition plate for isolating the winding coils at the two ends is arranged in the center of the mounting base. According to the utility model, the common mode magnetic core and the differential mode magnetic core use the common coil, so that the purposes of reducing copper loss and reducing the size of the inductor are achieved, and the inductor has the advantages of differential mode performance, common mode performance, weight reduction and low copper loss.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic components, and more specifically, relates to a combined single-phase large-current flat wire vertical winding differential and common-mode integrated inductor. Background Art

[0002] As the switching frequency of the switching power supply is getting higher and higher, the generated electromagnetic interference (EMI) signal is getting stronger. In order to suppress the external electromagnetic noise of the switching power supply and the internal electromagnetic interference from the outside, it is necessary to add common-mode and differential-mode inductors at the AC end of the switching power supply to meet the EMC requirements.

[0003] The common-mode inductor has two windings, and the design of these two windings is such that the current passes through the coil core wire in opposite directions along conduction. Theoretically, the magnetic fields of each other cancel each other out. However, since the coil winding loops sometimes cannot make a complete turn, or the winding is not tight enough, the magnetic field will leak out. After winding, it is impossible to concentrate all the magnetic fluxes at the center of the coil. The inductor caused by this magnetic leakage is called leakage inductance. In fact, it is also a differential-mode inductor. Therefore, ordinary inductors generally have a certain differential-mode interference attenuation ability to suppress differential-mode current, which is equivalent to the existence of a differential-mode inductor and a common-mode inductor, so as to achieve a better filtering effect.

[0004] However, at present, the product requirements are high-frequency and small volume to achieve high-efficiency performance. At present, the traditional existing solutions all add ferrite or magnetic powder core magnetic blocks between the two windings to increase the leakage inductance value. Because the magnetic permeability of the magnetic powder core is low, the increase in the leakage inductance value is small, and the use of a function DC superposition test instrument to simulate the large attenuation of the leakage inductance value under DC and the poor anti-saturation ability result in a deviation between the static leakage inductance differential-mode inductance and the application.

[0005] Therefore, the utility model provides a combined single-phase large-current flat wire vertical winding differential and common-mode integrated inductor. Summary of the Utility Model

[0006] In view of the above problems existing in the existing technology, the purpose of the utility model is to provide a combined single-phase large-current flat wire vertical winding differential and common-mode integrated inductor to solve the disadvantages of poor anti-saturation ability, low differential-mode inductance, and easy saturation of the magnetic core in the existing technology.

[0007] The purpose of the utility model can be achieved by the following technical solutions:

[0008] A combined single-phase large-current flat wire vertical-wound differential and common-mode integrated inductor, comprising a mounting base, a common-mode magnetic core, a differential-mode magnetic core, a winding coil, and an insulating partition. The upper part of the mounting base is provided with the common-mode magnetic core. The differential-mode magnetic cores are provided at both ends of the upper top surface of the common-mode magnetic core. The winding coil is wound around the differential-mode magnetic cores at both ends and the common-mode magnetic core. The differential-mode magnetic core and the common-mode magnetic core share the winding coil. The two ends of the winding coil at both ends are inserted into the mounting base. An insulating partition for isolating the winding coils at both ends is provided at the center of the mounting base.

[0009] As a further preferred technical solution of the present invention, an installation arch part for placing the common-mode magnetic core and the insulating partition is provided on the upper part of the mounting base. A limiting bracket is further provided on the installation arch part to further fix and position the common-mode magnetic core and the insulating partition. A rectangular through hole for inserting the two ends of the winding coil is also provided on the mounting base. Reinforcing ribs and supporting feet are provided on the lower bottom surface of the mounting base.

[0010] As a further preferred technical solution of the present invention, the common-mode magnetic core, the insulating partition, and the two ends of the winding coil are fixed to the mounting base by dotting epoxy resin glue. A groove is provided on the lower bottom surface of the mounting base at the installation arch part. The overall shape of the supporting feet is a cylinder.

[0011] As a further preferred technical solution of the present invention, the overall shape of the common-mode magnetic core is an oval ring. A protective shell is sleeved outside the common-mode magnetic core. A clamping structure is provided on the protective shell. The clamping structure is a protrusion provided along the outer edge and the inner edge of the protective shell. The protrusions provided on the protective shell form a "C"-shaped placement part at both ends of the protective shell. The common-mode magnetic core is an integrated part made of nanocrystalline or high-permeability ferrite material.

[0012] As a further preferred technical solution of the present invention, the overall shape of the differential-mode magnetic core is "C"-shaped. The differential-mode magnetic core is placed on the "C"-shaped placement part of the protective shell. The differential-mode magnetic core is fixed to the protective shell by dotting epoxy resin glue. The differential-mode magnetic core is an integrated part made of amorphous or silicon steel material.

[0013] As a further preferred technical solution of the present invention, the winding coil is vertically wound with flat copper wire. The shape of the coil of the winding coil is square. Uniform air ducts are reserved between each turn of the winding coil.

[0014] As a further preferred technical solution of the present invention, the overall shape of the insulating partition is a rectangular body. The insulating partition is an integrated part made of insulating plastic material.

[0015] As described above, a combined single-phase high-current flat wire vertical-wound differential common-mode integrated inductor provided by the present utility model has the following beneficial effects:

[0016] The present utility model utilizes the above-mentioned combined magnetic core low-cost and high-performance differential-mode inductor. Compared with the prior art, the common-mode magnetic core and the differential-mode magnetic core use a common coil, thereby reducing copper loss, shrinking the overall inductor volume, and realizing that an inductor has both differential and common-mode performances, achieving the advantages of weight reduction and low copper loss. Moreover, the magnetic circuit of the magnetic core is not closed, and the magnetic circuit of the magnetic core needs to pass through a relatively long air section, with too large air magnetic resistance, energy concentration, and the air magnetic path is not easily saturated, and it can even be used under high-current conditions, breaking through the disadvantages of poor anti-saturation ability, low differential-mode inductance, and easy saturation of the magnetic core in the prior art.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of a combined single-phase high-current flat wire vertical-wound differential common-mode integrated inductor applied for the present utility model;

[0020] Figure 2 It is a top view of a combined single-phase high-current flat wire vertical-wound differential common-mode integrated inductor applied for the present utility model;

[0021] Figure 3 It is a bottom view of a combined single-phase high-current flat wire vertical-wound differential common-mode integrated inductor applied for the present utility model;

[0022] Figure 4 It is a front view of a combined single-phase high-current flat wire vertical-wound differential common-mode integrated inductor applied for the present utility model;

[0023] Figure 5 It is a side view of a combined single-phase high-current flat wire vertical-wound differential common-mode integrated inductor applied for the present utility model;

[0024] Figure 6 It is a schematic structural diagram of the mounting base of a combined single-phase high-current flat wire vertical-wound differential common-mode integrated inductor applied for the present utility model.

[0025] Summary of reference numerals and their descriptions:

[0026] 100, mounting base; 110, arch part; 111, limit bracket; 120, rectangular through hole; 130, reinforcing rib; 140, support leg; 150, groove; 200, common-mode magnetic core; 210, protective shell; 220, clamping structure; 221, protrusion; 230, placement part; 300, differential-mode magnetic core; 400, winding coil; 500, insulating partition. Detailed implementation manners

[0027] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0028] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of narration and are not used to limit the scope for the implementation of the present utility model. The change or adjustment of their relative relationships, without substantial change of the technical content, should also be regarded as the scope for the implementation of the present utility model. The specific structure can be described with reference to the drawings of the patent application.

[0029] The present utility model provides a combined single-phase high-current flat wire vertical-wound differential and common-mode integrated inductor. Please refer to Figures 1 to 6 As shown in the figure, it includes a mounting base 100, a common-mode magnetic core 200, a differential-mode magnetic core 300, a winding coil 400 and an insulating partition 500. The common-mode magnetic core 200 is arranged on the upper part of the mounting base 100. The differential-mode magnetic cores 300 are arranged at both ends of the upper top surface of the common-mode magnetic core 200. The winding coil 400 is wound around the differential-mode magnetic cores 300 at both ends and the common-mode magnetic core 200. The differential-mode magnetic core 300 and the common-mode magnetic core 200 share the winding coil 400. The two ends of the winding coil 400 at both ends are inserted into the mounting base 100. An insulating partition 500 for isolating the winding coils 400 at both ends is arranged at the center of the mounting base 100.

[0030] Specifically, the specific structure of the mounting base 100 is as follows. Combining Figures 1 to 6As shown, an installation arch portion 110 for placing the common mode magnetic core 200 and the insulating partition 500 is provided on the upper part of the installation base 100. A limiting bracket 111 is further provided on the installation arch portion 110 to further fix and position the common mode magnetic core 200 and the insulating partition 500. A rectangular through hole 120 for inserting the two ends of the winding coil 400 is also provided on the installation base 100. The rectangular through hole 120 is used to accurately position and install the winding coil 400. Reinforcing ribs 130 and supporting feet 140 are provided on the lower bottom surface of the installation base 100 to enhance the structural strength of the installation base 100;

[0031] The two ends of the pins of the common mode magnetic core 200, the insulating partition 500 and the winding coil 400 are fixed to the installation base 100 with epoxy resin glue. A groove 150 is provided on the lower bottom surface of the installation base 100 at the installation arch portion 110. The setting of the groove 150 reduces the weight of the installation base 100. The overall shape of the supporting foot 140 is a cylinder.

[0032] Specifically, the specific structure of the common mode magnetic core 200 is as follows. Referring to Figures 1 to 5 As shown, the overall shape of the common mode magnetic core 200 is an oval ring. The oval ring shape can increase the distance between the winding coils 400 wound around the common mode magnetic core 200 to increase the leakage inductance value. A protective shell 210 is sleeved on the common mode magnetic core 200. A clamping structure 220 is provided on the protective shell 210. The clamping structure 220 is a protrusion 221 provided along the outer edge and inner edge of the protective shell 210. The protrusions 221 provided on the protective shell 210 form a "C"-shaped placement portion 230 at both ends of the protective shell 210. The common mode magnetic core 200 is an integral part made of nanocrystalline or high-permeability ferrite material.

[0033] Specifically, the specific structure of the differential mode magnetic core 300 is as follows. Referring to Figures 1 to 5 As shown, the overall shape of the differential mode magnetic core 300 is "C"-shaped. The differential mode magnetic core 300 is placed on the "C"-shaped placement portion 230 of the protective shell 210. The differential mode magnetic core 300 is fixed to the protective shell 210 with epoxy resin glue. The differential mode magnetic core 300 is an integral part made of amorphous or silicon steel material.

[0034] It should be noted that: the differential mode magnetic core 300 and the common mode magnetic core 200 have the advantages of high magnetic permeability and strong anti-saturation ability. Moreover, the magnetic circuit of the magnetic core is not closed. The magnetic circuit of the magnetic core needs to pass through a relatively long air section. The air magnetic resistance is too large, the energy is concentrated, and the air magnetic circuit is not easy to saturate, so as to realize the use under large current conditions.

[0035] Specifically, the specific structure of the winding coil 400 is as follows. Referring to Figures 1 to 5As shown, the winding coil 400 is wound vertically with flat copper wire. The shape of the winding coil 400 is square. The board area occupied by the square coil is 1 / 5 smaller than that of the traditional circular coil with the same cross-sectional area. A uniform air duct is reserved between each turn of the winding coil 400, which is conducive to the heat dissipation of the winding coil 400 and ensures the consistency of inductance performance.

[0036] The overall shape of the insulating partition 500 is a rectangular body. The insulating partition 500 is an integral part made of insulating plastic material. The insulating partition 500 is used to isolate the winding coils 400 at both ends and ensure the correct winding of the winding coils 400 at both ends on the differential-mode magnetic core 300.

[0037] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A combined single-phase large-current flat wire vertical-wound differential common-mode integrated inductor, characterized in that, It includes an installation base (100), a common-mode magnetic core (200), a differential-mode magnetic core (300), a winding coil (400), and an insulating partition (500). The upper part of the installation base (100) is provided with the common-mode magnetic core (200). The differential-mode magnetic cores (300) are arranged at both ends of the upper top surface of the common-mode magnetic core (200). The winding coil (400) is wound around the differential-mode magnetic cores (300) at both ends and the common-mode magnetic core (200). The differential-mode magnetic core (300) and the common-mode magnetic core (200) share the winding coil (400). The two ends of the winding coil (400) at both ends are inserted into the installation base (100). An insulating partition (500) for isolating the winding coils (400) at both ends is arranged at the center of the installation base (100).

2. The combined single-phase large-current flat wire vertical-wound differential common-mode integrated inductor according to claim 1, wherein, An installation arch part (110) for placing the common-mode magnetic core (200) and the insulating partition (500) is arranged at the upper part of the installation base (100). A limiting bracket (111) is also arranged on the installation arch part (110) to further fix and position the common-mode magnetic core (200) and the insulating partition (500). A rectangular through hole (120) for inserting the two ends of the winding coil (400) is formed on the installation base (100). Reinforcing ribs (130) and supporting feet (140) are arranged on the lower bottom surface of the installation base (100).

3. The combined single-phase high-current flat wire vertical-wound differential common-mode integrated inductor according to claim 2, characterized in that, Epoxy resin glue is used for point fixation between the two ends of the pins of the common-mode magnetic core (200), the insulating partition (500), and the winding coil (400) and the installation base (100). A groove (150) is formed on the lower bottom surface of the installation base (100) at the position of the installation arch part (110). The overall shape of the supporting foot (140) is a cylinder.

4. A combined single-phase high-current flat wire vertical-wound differential common-mode integrated inductor according to claim 1, characterized in that, The overall shape of the common-mode magnetic core (200) is an oval ring. A protective shell (210) is sleeved outside the common-mode magnetic core (200). A clamping structure (220) is arranged on the protective shell (210). The clamping structure (220) is a protrusion (221) arranged along the outer edge and the inner edge of the protective shell (210). The protrusions (221) arranged on the protective shell (210) form a "C"-shaped placement part (230) at both ends of the protective shell (210). The common-mode magnetic core (200) is an integrated part made of nanocrystalline or high-permeability ferrite material.

5. A combined single-phase high-current flat wire vertical-wound differential common-mode integrated inductor according to claim 4, characterized in that, The overall shape of the differential-mode magnetic core (300) is "C"-shaped. The differential-mode magnetic core (300) is placed on the "C"-shaped placement part (230) of the protective shell (210). Epoxy resin glue is used for point fixation between the differential-mode magnetic core (300) and the protective shell (210). The differential-mode magnetic core (300) is an integrated part made of amorphous or silicon steel material.

6. The combined single-phase high-current flat wire vertical-wound differential common-mode integrated inductor according to claim 1, characterized in that, The winding coil (400) is wound vertically with flat copper wire. The shape of the coil of the winding coil (400) is square. Uniform air ducts are reserved between each turn of the winding coil (400).

7. A combined single-phase large-current flat wire vertical-wound differential common-mode integrated inductor according to claim 1, characterized in that, The overall shape of the insulating partition (500) is a rectangular body. The insulating partition (500) is an integrated part made of insulating plastic material.

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