High-saturation common-mode inductor with anti-interference structure

Abstract

The utility model discloses a high saturation common mode choke with an anti-interference structure, which belongs to the technical field of inductors, and comprises a magnetic core and coils symmetrically wound on the magnetic core, an insulating plastic layer is coated outside the magnetic core, and the insulating plastic layer is coated outside the coil. A separation assembly is installed between the symmetrically-arranged coils and can be clamped with the magnetic core through the spacer bushes at the two ends of the first connecting plate and the second connecting plate, meanwhile, the adhesive layer is bonded with the frosted bonding area, and the separation assembly is fixed to the magnetic core, so that the end portions of the two sets of coils can be effectively prevented from making contact with each other; and the anti-interference effect between the coils is good, so as to ensure that breakdown short circuit does not occur between turns of the coils under the action of instantaneous overvoltage.

Description

Technical Field

[0001] The utility model relates to the technical field of inductors, and more specifically to a high-saturation common-mode inductor with an anti-interference structure. Background Art

[0002] Common mode inductors, also called common mode chokes, are often used in computer switching power supplies to filter common mode electromagnetic interference signals. In board design, common mode inductors also play the role of EMI filtering, which is used to suppress the electromagnetic waves generated by high-speed signal lines from radiating outward.

[0003] Common-mode inductors are used in various electrical appliances, but existing common-mode inductors still have defects. When winding the wires on the magnetic ring, the wires are easy to contact each other because the aperture of the magnetic ring is small, which will increase the parasitic capacitance of the coil and reduce the coil's ability to withstand transient overvoltage. An existing patent for a common-mode inductor, the patent authorization number is CN 208706363 U. When normal current is passed through the wire windings, the current generates reverse magnetic fields in the wire windings wound in the same phase and cancel each other out; when common-mode current flows through the wire windings, due to the isotropic nature of the common-mode current, a magnetic field in the same direction is generated in the wire windings, increasing the inductive reactance of the wire windings, making the wire windings appear as high impedance, and producing a strong damping effect, thereby attenuating the common-mode current and achieving the purpose of filtering.

[0004] However, in the patent authorization number CN 208706363 U, since the partition is set on the inner side of the magnetic core, it is easy for the two sets of coils to contact on the outer side of the magnetic core, and it is easy for the turns of the coils to be short-circuited under the action of transient overvoltage. Therefore, we propose a high-saturation common-mode inductor with an anti-interference structure to solve the above-mentioned problems. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide a high-saturation common-mode inductor with an anti-interference structure, which can be engaged with the magnetic core through the spacers at both ends of the first connecting plate and the second connecting plate, and at the same time, the adhesive layer and the frosted bonding area are bonded to fix the separation component at the magnetic core, which can effectively prevent the ends of the two groups of coils from contacting each other, and has a good anti-interference effect between the coils, so as to ensure that no breakdown short circuit occurs between the turns of the coil under the action of transient overvoltage.

[0007] 2. Technical solution

[0008] To solve the above problems, the utility model adopts the following technical solutions.

[0009] A high saturation common mode inductor with an anti-interference structure comprises a magnetic core and a coil symmetrically wound around the magnetic core, wherein the outer portion of the magnetic core is coated with an insulating plastic layer;

[0010] A separation component is installed between the symmetrically arranged coils;

[0011] The separation assembly includes a first connecting plate and a second connecting plate symmetrically mounted on the inner side of the magnetic core, an adhesive layer coated on the surface of the first connecting plate corresponding to the second connecting plate, a frosted bonding area arranged on the surface of the second connecting plate and bonded to the adhesive layer, and a spacer fixedly connected to both ends of the first connecting plate and the second connecting plate and engaged with the magnetic core;

[0012] A base is installed below the magnetic core.

[0013] Furthermore, the coil is in contact with the insulating plastic layer, and the insulating plastic layer is made of polyetheretherketone.

[0014] Furthermore, the first connecting plate, the second connecting plate and the spacer are all made of alumina ceramic.

[0015] Furthermore, the bottom ends of the two groups of coils are provided with connecting pins, and each group of coils is provided with two connecting pins.

[0016] Furthermore, the upper surface of the base is coated with hot melt adhesive that is bonded to the separation component and the magnetic core.

[0017] Furthermore, a pin is fixedly connected to the lower surface of the base, and the pin passes through the base and is welded to the connecting pin, and the pin is made of copper material.

[0018] Furthermore, the two groups of coils are both wound in a single layer on the magnetic core.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] (1) This solution is to coat an adhesive layer on the surface of the first connecting plate constituting the separation component, and then install the separation component between the two groups of coils to separate the two groups of coils. The spacers at both ends of the first connecting plate and the second connecting plate are engaged with the magnetic core, and the adhesive layer is bonded to the frosted bonding area to fix the separation component to the magnetic core. This can effectively prevent the ends of the two groups of coils from contacting each other, and has a good anti-interference effect between the coils, so as to ensure that no breakdown short circuit occurs between the turns of the coil under the action of transient overvoltage.

[0022] (2) In this solution, an insulating plastic layer made of polyetheretherketone is coated on the outside of the magnetic core. Polyetheretherketone has excellent heat resistance, chemical corrosion resistance, high strength and high stiffness to prevent breakdown between the coil and the magnetic core under the action of transient overvoltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 2 It is a side view schematic diagram of the utility model;

[0025] Figure 3 It is a schematic cross-sectional view of the AA part of the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the first connecting plate of the utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the second connecting plate of the utility model.

[0028] Description of the numbers in the figure:

[0029] 1. Magnetic core; 2. Coil; 3. Insulating plastic layer; 4. First connecting plate; 5. Second connecting plate; 6. Adhesive layer; 7. Frosted bonding area; 8. Spacer; 9. Connecting foot; 10. Base; 11. Hot melt adhesive; 12. Pin. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0031] Example:

[0032] See also Figure 1-5 , a high saturation common mode inductor with an anti-interference structure, comprising a magnetic core 1 and a coil 2 symmetrically wound around the magnetic core 1, wherein the outer portion of the magnetic core 1 is coated with an insulating plastic layer 3;

[0033] A separation component is installed between the symmetrically arranged coils 2;

[0034] The separation component includes a first connecting plate 4 and a second connecting plate 5 symmetrically installed on the inner side of the magnetic core 1, an adhesive layer 6 coated on the surface of the first connecting plate 4 corresponding to the second connecting plate 5, a frosted bonding area 7 arranged on the surface of the second connecting plate 5 and bonded to the adhesive layer 6, and a spacer 8 fixedly connected to both ends of the first connecting plate 4 and the second connecting plate 5 and engaged with the magnetic core 1;

[0035] A base 10 is installed below the magnetic core 1;

[0036] It should be noted that, by winding the coil 2 in a saturated state on the outside of the magnetic core 1, by coating the adhesive layer 6 on the surface of the first connecting plate 4 that constitutes the separation component, and then installing the separation component between the two groups of coils 2 to separate the two groups of coils 2, the spacers 8 at both ends of the first connecting plate 4 and the second connecting plate 5 are engaged with the magnetic core 1, and at the same time, the adhesive layer 6 is bonded to the frosted bonding area 7, and the separation component is fixed to the magnetic core 1, which can effectively prevent the ends of the two groups of coils 2 from contacting each other, and has a good anti-interference effect between the coils 2, so as to ensure that no breakdown short circuit occurs between the turns of the coil 2 under the action of transient overvoltage.

[0037] like Figure 3 As shown, the coil 2 is in contact with the insulating plastic layer 3, and the insulating plastic layer 3 is made of polyetheretherketone;

[0038] It should be noted that the insulating plastic layer 3 made of polyetheretherketone is coated on the outside of the magnetic core 1. Polyetheretherketone has excellent heat resistance, chemical corrosion resistance, high strength and high rigidity to prevent breakdown between the coil 2 and the magnetic core 1 under transient overvoltage.

[0039] like Figure 4 , Figure 5 As shown, the first connecting plate 4, the second connecting plate 5 and the spacer 8 are all made of alumina ceramics;

[0040] It should be noted that the partition assembly has a good insulation effect.

[0041] like Figure 1 The bottom ends of the two groups of coils 2 are both provided with connecting pins 9, and each group of coils 2 is provided with two connecting pins 9, and the lower surface of the base 10 is fixedly connected with a pin 12, and the pin 12 penetrates the base 10 and is welded to the connecting pin 9, and the pin 12 is made of copper material;

[0042] It should be noted that the common mode inductor is connected to the circuit via the connection pin 9 so as to suppress the electromagnetic waves generated by the high-speed signal line from radiating outward.

[0043] like Figure 1 As shown, the upper surface of the base 10 is coated with hot melt adhesive 11 which is bonded to the separation component and the magnetic core 1;

[0044] It should be noted that the connection stability between the base 10 and the magnetic core 1 is ensured.

[0045] like Figure 1 As shown, the two sets of coils 2 are both wound in a single layer on the magnetic core 1;

[0046] It should be noted that this can reduce the parasitic capacitance of the coil 2 and enhance the ability of the coil 2 to withstand transient overvoltages.

[0047] When in use: by winding the coil 2 in a saturated state around the outside of the magnetic core 1, by coating the adhesive layer 6 on the surface of the first connecting plate 4 that constitutes the separation component, and then installing the separation component between the two groups of coils 2 to separate the two groups of coils 2, the spacers 8 at both ends of the first connecting plate 4 and the second connecting plate 5 are engaged with the magnetic core 1, and at the same time, the adhesive layer 6 is bonded to the frosted bonding area 7, and the separation component is fixed to the magnetic core 1, which can effectively prevent the ends of the two groups of coils 2 from contacting each other, and has a good anti-interference effect between the coils 2, so as to ensure that no breakdown short circuit occurs between the turns of the coil 2 under the action of transient overvoltage.

[0048] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A high saturation common mode inductor with an anti-interference structure, comprising a magnetic core (1) and a coil (2) symmetrically wound around the magnetic core (1), characterized in that: The outside of the magnetic core (1) is coated with an insulating plastic layer (3); A separation component is installed between the symmetrically arranged coils (2); The separation component comprises a first connecting plate (4) and a second connecting plate (5) symmetrically mounted on the inner side of the magnetic core (1), an adhesive layer (6) coated on the surface of the first connecting plate (4) corresponding to the surface of the second connecting plate (5), a frosted bonding area (7) arranged on the surface of the second connecting plate (5) and bonded to the adhesive layer (6), and a spacer (8) fixedly connected to both ends of the first connecting plate (4) and the second connecting plate (5) and engaged with the magnetic core (1); A base (10) is installed below the magnetic core (1).

2. The high saturation common mode inductor with anti-interference structure according to claim 1, characterized in that: The coil (2) is in contact with the insulating plastic layer (3), and the insulating plastic layer (3) is made of polyetheretherketone.

3. The high saturation common mode inductor with anti-interference structure according to claim 1, characterized in that: The first connecting plate (4), the second connecting plate (5) and the spacer (8) are all made of alumina ceramic material.

4. The high saturation common mode inductor with anti-interference structure according to claim 1, characterized in that: The bottom ends of the two groups of coils (2) are both provided with connecting pins (9), and each group of coils (2) is provided with two connecting pins (9).

5. The high saturation common mode inductor with anti-interference structure according to claim 1, characterized in that: The upper surface of the base (10) is coated with hot melt adhesive (11) which is bonded to the separation component and the magnetic core (1).

6. The high saturation common mode inductor with anti-interference structure according to claim 4, characterized in that: A pin (12) is fixedly connected to the lower surface of the base (10), and the pin (12) passes through the base (10) and is welded to the connecting pin (9), and the pin (12) is made of copper material.

7. The high saturation common mode inductor with anti-interference structure according to claim 1, characterized in that: The two groups of coils (2) are both wound in a single layer on the magnetic core (1).

Images