High-current power inductor

Abstract

The embodiment of the utility model discloses a large current power inductor, the large current power inductor comprises a magnetic core, a base and a coil, the magnetic core comprises a first body, a second body, a first middle column and a second middle column, the first body, the second body and the base enclose to form an accommodating cavity, the first middle column is arranged in the accommodating cavity and is connected with the first body, and the second middle column is arranged in the accommodating cavity and is connected with the second body. The coil is provided with an inner hole, the inner hole is rectangular, the first middle column and the second middle column are both arranged in the inner hole in a penetrating mode, and due to the fact that the first middle column and the second middle column are arranged to be rectangular, compared with the prior art that the first middle column and the second middle column are arranged to be circular, the height of the inductor can be reduced, and the size of the inductor is reduced. Therefore, the size of the inductor is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of inductors, in particular to a large current power 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 the power supply and reduce losses, the product size can be further compressed. At the same time as the frequency is increased, the inductor needs a smaller inductance value to meet the design requirements, so that a lower DCR (direct current resistance) can be achieved by reducing the number of turns of the winding to meet the high-power design requirements.

[0003] Some existing flat linear power inductors or coupled inductors usually adopt a circular core center column design, which makes it difficult to achieve the expected height in many lightweight and modular design solutions. The design of the circular center column and the flat linear winding structure will increase the height of the inductor, thereby affecting the volume of the inductor. Utility Model Content

[0004] Based on this, it is necessary to provide a high-current power inductor to solve the technical problem that some existing flat linear power inductors or coupled inductors usually adopt a circular design with a magnetic core center column. This makes it difficult to reach the expected height in many lightweight and modular design schemes. The design of the circular center column and the flat linear winding structure will increase the height of the inductor, thereby affecting the volume of the inductor.

[0005] The utility model provides a high-current power inductor, which comprises a magnetic core, a base and a coil. The magnetic core comprises a first body, a second body, a first middle column and a second middle column. The first body and the second body are both surrounded by the base to form a receiving cavity. The first middle column is arranged in the receiving cavity and connected to the first body. The second middle column is arranged in the receiving cavity and connected to the second body. The first middle column and the second middle column are both rectangular. The coil is provided with an inner hole, which is rectangular. The first middle column and the second middle column are both penetrated through the inner hole.

[0006] In one embodiment, the coil includes a first winding and a second winding, and the turns of the first winding and the second winding are stacked.

[0007] In one embodiment, the first winding and the second winding both include a main body and pins connected to the main body, and the magnetic core is provided with a wire outlet hole, and the wire outlet hole is used to avoid the pins.

[0008] In one embodiment, the base is provided with a lead groove, the pin is provided with a first bending portion, and the first bending portion is arranged in the lead groove.

[0009] In one embodiment, the base is further provided with an electrode groove connected to the lead groove, and the pin is provided with a second bending portion, which is arranged in the electrode groove and is used for electrically connecting with an external circuit.

[0010] In one embodiment, the base is further provided with a positioning platform, and the positioning platform is used to position the base.

[0011] In one embodiment, the material of the magnetic core may be a structural member made of soft magnetic material.

[0012] In one embodiment, the material of the magnetic core may be a structural member made of sendust, iron-silicon, iron-nickel or iron-silicon-nickel.

[0013] In one embodiment, the base may be made of a structure made of sendust aluminum, iron silicon, iron nickel or iron silicon nickel.

[0014] In one embodiment, the cross section of the coil is flat; and / or

[0015] The coil is wound in a double-wire or multi-wire parallel vertical winding manner.

[0016] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0017] The high-current power inductor of the utility model is adopted. The magnetic core of the high-current power inductor includes a first body, a second body, a first middle column and a second middle column. The first body and the second body are both enclosed with the base to form a receiving cavity. The first middle column is arranged in the receiving cavity and is connected to the first body. The second middle column is arranged in the receiving cavity and is connected to the second body. The first middle column and the second middle column are both rectangular. The coil is provided with an inner hole, and the inner hole is rectangular. The first middle column and the second middle column are both penetrated by the inner hole. Since the first middle column and the second middle column are arranged in a rectangular shape, compared with the prior art that is arranged in a circular shape, the height of the inductor can be reduced, thereby reducing the volume of the inductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] in:

[0020] Figure 1 FIG. 4 is an isometric diagram of a high current power inductor according to an embodiment.

[0021] Figure 2 for Figure 1 An exploded diagram of a high current power inductor is shown.

[0022] Figure 3 for Figure 2 Schematic diagram of the coil in the high current power inductor shown.

[0023] Figure 4 for Figure 2 Schematic diagram of the base in the high current power inductor shown.

[0024] Reference numerals:

[0025] 1. magnetic core; 11. first body; 12. second body; 13. first center column; 14. second center column; 15. accommodating cavity; 16. outlet hole;

[0026] 2. Base; 21. Lead groove; 22. Electrode groove; 23. Positioning platform;

[0027] 3. Coil; 31. First winding; 311. Main body; 312. Pin; 3121. First bending portion; 3122. Second bending portion; 313. Electrode; 32. Second winding; 100. Inner hole. 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 current power inductor provided by the utility model is now described.

[0034] The high-current power inductor includes a magnetic core 1, a base 2 and a coil 3. The magnetic core 1 includes a first body 11, a second body 12, a first middle column 13 and a second middle column 14. The first body 11 and the second body 12 are both enclosed with the base 2 to form a receiving cavity 15. The first middle column 13 is arranged in the receiving cavity 15 and is connected to the first body 11. The second middle column 14 is arranged in the receiving cavity 15 and is connected to the second body 12. The first middle column 13 and the second middle column 14 are both rectangular. The coil 3 is provided with an inner hole 100. The inner hole 100 is rectangular. The first middle column 13 and the second middle column 14 are both penetrated by the inner hole 100.

[0035] It can be understood that the magnetic core 1 of the high-current power inductor includes a first body 11, a second body 12, a first middle column 13 and a second middle column 14. The first body 11 and the second body 12 are both enclosed with the base 2 to form a receiving cavity 15. The first middle column 13 is arranged in the receiving cavity 15 and is connected to the first body 11. The second middle column 14 is arranged in the receiving cavity 15 and is connected to the second body 12. The first middle column 13 and the second middle column 14 are both rectangular. The coil 3 is provided with an inner hole 100, and the inner hole 100 is rectangular. The first middle column 13 and the second middle column 14 are both penetrated by the inner hole 100. Since the first middle column 13 and the second middle column 14 are set to be rectangular, compared with the prior art set to be circular, the height of the inductor can be reduced, thereby reducing the volume of the inductor.

[0036] In addition, by providing the first body 11 and the second body 12 , the coil 3 can be installed more conveniently.

[0037] In this embodiment, the coil 3 includes a first winding 31 and a second winding 32, and the turns of the first winding 31 and the second winding 32 are stacked, so that the distance between the first winding 31 and the second winding 32 can be reduced, thereby reducing the inductance volume.

[0038] In one embodiment, if Figure 2 and Figure 3 As shown, the first winding 31 and the second winding 32 both include a main body 311 and a pin 312 connected to the main body 311. The magnetic core 1 is provided with a wire outlet hole 16, and the wire outlet hole 16 is used to avoid the pin 312. The pin 312 does not interfere with the magnetic core 1, so that the pin 312 can be led out from the wire outlet hole 16.

[0039] In this embodiment, the base 2 is provided with a lead groove 21, and the pin 312 is provided with a first bending portion 3121, and the first bending portion 3121 is arranged in the lead groove 21. By providing the lead groove 21, the first bending portion 3121 is arranged in the lead groove 21, so that the first bending portion 3121 is not arranged outside the base 2, so as to avoid collision or interference with external elements.

[0040] Furthermore, the base 2 is also provided with an electrode slot 22 connected to the lead slot 21, and the pin 312 is provided with a second bending portion 3122, which is arranged in the electrode slot 22 and is used to be electrically connected to an external circuit. Since the pin 312 is connected by soldering through the terminal in the prior art, and then the terminal is bent to be electrically connected to the external circuit board, bending the terminal will lead to the risk of open welding between the pin 312 and the soldering position of the terminal. By providing the second bending portion 3122, the second bending portion 3122 can be directly electrically connected to the external circuit board, which can effectively avoid the risks of false welding, false welding and open circuit in the terminal process, and improve reliability.

[0041] In one embodiment, if Figure 2 and Figure 4 As shown, the base 2 is further provided with a positioning platform 23, which is used to position the base 2. By providing the positioning platform 23, the base 2 can be arranged between the pins 312 of the coil 3 during the process of enclosing the magnetic core 1, thereby positioning the base 2 and facilitating the installation of the base 2.

[0042] In one embodiment, if Figure 1 and Figure 2 As shown, the material of the magnetic core 1 can be a structural member made of soft magnetic material, so that the inductor can withstand a larger current spike impact.

[0043] Specifically, the material of the magnetic core 1 can be a structural member made of sendust, iron-silicon, iron-nickel or iron-silicon-nickel.

[0044] Of course, in other embodiments, the inductance performance can be adjusted by combining ferrite and magnetic powder core to meet various design requirements.

[0045] In this embodiment, the base 2 may be made of a structure made of aluminum-silicon-iron, silicon-iron, nickel-iron or nickel-silicon-iron. The magnetic core 1 and the base 2 partially wrap the coil 3 to achieve a low-radiation shielding effect.

[0046] Of course, in other embodiments, the inductance performance can be adjusted by combining ferrite and magnetic powder core to meet various design requirements.

[0047] In one embodiment, if Figure 2 and Figure 3As shown, the cross section of the coil 3 is flat. The flat linear coil 3 can effectively reduce the high-frequency skin effect and further reduce the copper wire loss caused by high-frequency ripple.

[0048] By winding the first winding 31 and the second winding 32 in a flat wire vertical winding manner, the coil 3 is arranged neatly and regularly, the inductance values ​​of the first winding 31 and the second winding 32 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.

[0049] By winding the first winding 31 and the second winding 32 in a side-by-side manner with the flat linear coil 3, the distance between the first winding 31 and the second winding 32 can be reduced to obtain a maximum coupling coefficient.

[0050] 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.

[0051] 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 current power inductor, characterized in that: The high-current power inductor includes a magnetic core, a base and a coil. The magnetic core includes a first body, a second body, a first middle column and a second middle column. The first body and the second body are both surrounded by the base to form a receiving cavity. The first middle column is arranged in the receiving cavity and connected to the first body. The second middle column is arranged in the receiving cavity and connected to the second body. The first middle column and the second middle column are both rectangular. The coil is provided with an inner hole, and the inner hole is rectangular. The first middle column and the second middle column are both penetrated by the inner hole.

2. The high current power inductor according to claim 1, characterized in that: The coil includes a first winding and a second winding, and the first winding and the second winding are stacked with turns.

3. The high current power inductor according to claim 2, characterized in that: The first winding and the second winding both include a main body and pins connected to the main body. The magnetic core is provided with a wire outlet hole, and the wire outlet hole is used to avoid the pins.

4. The high current power inductor according to claim 3, characterized in that: The base is provided with a lead groove, the pin is provided with a first bending portion, and the first bending portion is arranged in the lead groove.

5. The high current power inductor according to claim 4, characterized in that: The base is also provided with an electrode groove connected with the lead groove, and the pin is provided with a second bending portion, which is arranged in the electrode groove and is used for electrically connecting with an external circuit.

6. The high current power inductor according to claim 1, characterized in that: The base is also provided with a positioning platform, and the positioning platform is used for positioning the base.

7. The high current power inductor according to claim 1, characterized in that: The material of the magnetic core can be a structural member made of soft magnetic material.

8. The high current power inductor according to claim 7, characterized in that: The material of the magnetic core can be a structural member made of sendust, iron-silicon, iron-nickel or iron-silicon-nickel.

9. The high current power inductor according to claim 1, characterized in that: The base may be made of a structure made of aluminum-silicon-iron, iron-silicon, iron-nickel or iron-silicon-nickel.

10. The high current power inductor according to claim 1, characterized in that: The cross section of the coil is flat; and / or The coil is wound in a double-wire or multi-wire parallel vertical winding manner.

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