High-voltage high-power coupling inductor

Abstract

The high-voltage and high-power coupling inductor comprises a magnetic core, a coil and a base, the magnetic core is provided with a containing cavity and an opening communicated with the containing cavity, the coil comprises a body and two pins connected with the body, the body is installed in the containing cavity from the opening, and the two pins are arranged on the base. The base is arranged in the containing cavity and covers the opening in a sealing mode, the base is provided with the two lead grooves, the two pins are led out of the two lead grooves respectively, the magnetic core does not need to be slotted, only the lead grooves are formed in the base, the technology is reduced, and the radiation shielding effect can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of inductors, in particular to a high-voltage and high-power coupled inductor. Background Art

[0002] At present, high efficiency, energy saving and environmental protection have become the development direction of the electronics industry, and small size, low radiation and high power density design have become the mainstream design in the market. Since the technology of semiconductors such as gallium nitride and silicon carbide can greatly increase the switching frequency of power supply and reduce losses, the product size can be further compressed.

[0003] Most of the existing inductors include a magnetic core, a coil and a base. In order to allow the pins of the coil to be led out on the base, the magnetic core needs to be slotted, which increases the process and affects the radiation shielding effect. Utility Model Content

[0004] Based on this, it is necessary to provide a high-voltage and high-power coupled inductor, which aims to solve the technical problem that most of the existing inductors include a magnetic core, a coil and a base. In order for the pins of the coil to be led out on the base, the magnetic core needs to be slotted, which increases the process and affects the effect of shielding radiation.

[0005] The utility model provides a high-voltage and high-power coupled inductor, which comprises a magnetic core, a coil and a base, wherein the magnetic core has a receiving cavity and an opening communicating with the receiving cavity, the coil comprises a body and two pins connected to the body, the body is installed in the receiving cavity from the opening, the base is arranged in the receiving cavity and covers the opening, the base is provided with two lead grooves, and the two pins are respectively led out from the two lead grooves.

[0006] In one embodiment, the two pins each include a first bending portion and a second bending portion, and the base is also provided with two electrode grooves respectively connected to the two lead grooves, the two first bending portions are respectively led out from the two lead grooves, and the two second bending portions are respectively installed in the two electrode grooves.

[0007] In one embodiment, the two pins are arranged in the same direction.

[0008] In one embodiment, two coils are provided, namely a first coil and a second coil, and the lead grooves and the electrode grooves correspond one-to-one to the pins of the first coil and the second coil respectively.

[0009] In one embodiment, the high-voltage and high-power coupled inductor further includes a middle column, which is mounted on the base and through which the first coil and the second coil are passed.

[0010] In one embodiment, the shape of the center column can be oval or rectangular.

[0011] In one embodiment, the high-voltage and high-power coupled inductor further includes an insulating member, and the insulating member is disposed between the first coil and the second coil.

[0012] In one embodiment, the insulating component may be a structural component made of ferrite material, magnetic powder core material, ceramic or polyester imide.

[0013] In one embodiment, the insulating member may be oval or rectangular.

[0014] In one embodiment, the base may be oval or rectangular.

[0015] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0016] The high-voltage and high-power coupled inductor of the utility model is adopted. The magnetic core of the high-voltage and high-power coupled inductor has a containing cavity and an opening connected to the containing cavity. The coil includes a body and two pins connected to the body. The body is installed in the containing cavity from the opening. The base is arranged in the containing cavity and covers the opening. The base is provided with two lead grooves. The two pins are respectively led out from the two lead grooves, so that the magnetic core does not need to be grooved, and only the lead grooves are provided on the base, which reduces the process and can improve the effect of shielding radiation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] in:

[0019] Figure 1 FIG. 1 is an axonometric diagram of a high-voltage, high-power coupled inductor in one embodiment.

[0020] Figure 2 for Figure 1 Schematic diagram of the magnetic core in the high-voltage and high-power coupled inductor shown.

[0021] Figure 3 for Figure 1 Schematic diagram of the base and center column in the high-voltage, high-power coupled inductor shown.

[0022] Figure 4 for Figure 1Schematic diagram of the coil, center column, insulation and base in the high-voltage and high-power coupled inductor shown.

[0023] Reference numerals:

[0024] 1. magnetic core; 11. accommodating cavity; 12. opening;

[0025] 2. Coil; 21. Body; 22. Pin; 221. First bending portion; 222. Second bending portion;

[0026] 3. Base; 31. Lead slot; 32. Electrode slot;

[0027] 4. Center column; 5. Insulation. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0031] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0032] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0033] Please combine Figures 1 to 4 , the high voltage and high power coupled inductor provided by the utility model is now described.

[0034] The high-voltage and high-power coupled inductor includes a magnetic core 1, a coil 2 and a base 3. The magnetic core 1 has a receiving cavity 11 and an opening 12 connected to the receiving cavity 11. The coil 2 includes a body 21 and two pins 22 connected to the body 21. The body 21 is installed in the receiving cavity 11 from the opening 12. The base 3 is arranged in the receiving cavity 11 and covers the opening 12. The base 3 is provided with two lead grooves 31, and the two pins 22 are respectively led out from the two lead grooves 31.

[0035] It can be understood that the magnetic core 1 of the high-voltage and high-power coupled inductor has a accommodating cavity 11 and an opening 12 connected to the accommodating cavity 11, the coil 2 includes a main body 21 and two pins 22 connected to the main body 21, the main body 21 is installed in the accommodating cavity 11 from the opening 12, the base 3 is arranged in the accommodating cavity 11 and covers the opening 12, the base 3 is provided with two lead grooves 31, and the two pins 22 are respectively led out from the two lead grooves 31, so that the magnetic core 1 does not need to be grooved, and only the lead grooves 31 are provided on the base 3, which reduces the process and can improve the radiation shielding effect.

[0036] In addition, the base 3 can locate the installation position of the base 3 and the installation position of the coil 2 through the accommodating cavity 11, and a positioning jig is not required, so the assembly process is simple and the cost is lower.

[0037] In this embodiment, the two pins 22 each include a first bending portion 221 and a second bending portion 222, and the base 3 is further provided with two electrode slots 32 respectively connected to the two lead slots 31, the two first bending portions 221 are respectively led out from the two lead slots 31, and the two second bending portions 222 are respectively installed in the two electrode slots 32. After the first bending portion 221 is led out from the lead slot 31, the second bending portion 222 is installed in the electrode slot 32, so that the second bending portion 222 can be directly used as an electrode to be electrically connected to an external circuit board. Since most of the existing pins 22 are soldered to the wiring terminal, and then the wiring terminal is bent to be electrically connected to the external circuit board, due to the bending of the wiring terminal, there is a risk of open welding between the pin 22 and the wiring terminal soldering position. Therefore, directly using the pin 22 as an electrode can avoid the risk of open welding.

[0038] Furthermore, the two pins 22 are arranged in the same direction. In this way, the pins 22 do not need to be twisted to be arranged in opposite directions, and the space of the magnetic core 1 can be more effectively utilized. The number of turns of each coil 2 is consistent, and the coupling effect is better.

[0039] In one embodiment, if Figures 1 to 4As shown, there are two coils 2, namely the first coil 2 and the second coil 2, and the lead slot 31 and the electrode slot 32 correspond to the pins 22 of the first coil 2 and the second coil 2, respectively. By setting the first coil 2 and the second coil 2, the key components in multi-phase regulators such as SEPIC, ZETA or CuK converters are made. When the first coil 2 and the second coil 2 are in a highly coupled state, the two coils 2 can each bear half of the ripple, thereby reducing the inductance requirement by half. Compared with using two separate power inductors, the use of coupled dual inductors is smaller in size, thereby saving board space.

[0040] In one embodiment, if Figure 4 As shown, the cross section of the body 21 is flat. By using a flat wire winding method to replace the traditional I-shaped magnetic core 1 to wind the round enameled wire, the cross-sectional area of ​​the wire is increased with the same number of turns, the DCR (direct current resistance) is reduced, and a greater overcurrent capacity is achieved.

[0041] Flat wire winding can effectively reduce the high-frequency skin effect and further reduce the copper wire loss caused by high-frequency ripple.

[0042] By winding the flat wire vertically, the coil 2 is arranged neatly and regularly, the inductance values ​​of the first coil 2 and the second coil 2 are balanced, the accuracy is improved, the maximum coupling coefficient can be obtained, the leakage inductance is reduced, and the conversion efficiency is improved. At the same time, the distributed capacitance can be effectively reduced, the cutoff frequency of the inductance is increased, and the operating frequency is further improved.

[0043] In one embodiment, if Figure 4 As shown, the high-voltage high-power coupled inductor further includes a middle column 4, which is mounted on the base 3 and penetrates the first coil 2 and the second coil 2. By providing the middle column 4, the installation position of the coil 2 can be located, thereby facilitating the installation of the coil 2.

[0044] In this embodiment, the shape of the center column 4 can be oval or rectangular.

[0045] In one embodiment, continue as Figure 4 As shown, the high-voltage high-power coupled inductor further includes an insulating member 5, which is disposed between the first coil 2 and the second coil 2. By disposing the insulating member 5 between the first coil 2 and the second coil 2, the withstand voltage between the coils 2 can be improved, so that no circuit problems will occur when used in high-voltage scenarios.

[0046] In this embodiment, the insulating member 5 may be a structural member made of ferrite material, magnetic powder core material, ceramic or polyester imide.

[0047] Furthermore, the insulating member 5 may be oval or rectangular.

[0048] In one embodiment, if Figure 3 As shown, the base 3 may be oval or rectangular.

[0049] In one embodiment, if Figure 1 and Figure 2 As shown, the magnetic core 1 is a structural member made of a soft saturation magnetic core 1 material. In this way, the inductor can withstand a larger current spike impact.

[0050] In this embodiment, the magnetic core 1 is a structural member made of sendust aluminum, iron silicon, iron nickel or iron silicon nickel.

[0051] Of course, in other embodiments, the material of the magnetic core 1 can be selected by combining ferrite and magnetic powder core to adjust the inductance performance to meet various design requirements.

[0052] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A high voltage and high power coupled inductor, characterized in that: The high-voltage and high-power coupled inductor includes a magnetic core, a coil and a base. The magnetic core has a receiving cavity and an opening connected to the receiving cavity. The coil includes a body and two pins connected to the body. The body is installed in the receiving cavity from the opening. The base is arranged in the receiving cavity and covers the opening. The base is provided with two lead grooves, and the two pins are respectively led out from the two lead grooves.

2. The high-voltage and high-power coupled inductor according to claim 1, characterized in that: The two pins each include a first bending portion and a second bending portion, and the base is also provided with two electrode grooves respectively connected to the two lead grooves, the two first bending portions are respectively led out from the two lead grooves, and the two second bending portions are respectively installed in the two electrode grooves.

3. The high-voltage and high-power coupled inductor according to claim 2, characterized in that: The two pins are arranged in the same direction.

4. The high-voltage and high-power coupled inductor according to claim 2, characterized in that: The coils are provided with two, namely a first coil and a second coil, and the lead grooves and the electrode grooves correspond to the pins of the first coil and the second coil respectively.

5. The high-voltage and high-power coupled inductor according to claim 4, characterized in that: The high-voltage and high-power coupled inductor further includes a middle column, which is mounted on the base and through which the first coil and the second coil are passed.

6. The high-voltage and high-power coupled inductor according to claim 5, characterized in that: The shape of the center column can be oval or rectangular.

7. The high-voltage and high-power coupled inductor according to claim 4, characterized in that: The high-voltage and high-power coupled inductor further includes an insulating member, and the insulating member is arranged between the first coil and the second coil.

8. The high-voltage and high-power coupled inductor according to claim 7, characterized in that: The insulating member may be a structural member made of ferrite material, magnetic powder core material, ceramic or polyester imide.

9. The high-voltage and high-power coupled inductor according to claim 7, characterized in that: The insulating member may be oval or rectangular.

10. The high-voltage and high-power coupled inductor according to claim 1, characterized in that: The base may be oval or rectangular.

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