High-frequency high-power resonant inductor

Abstract

The utility model provides a high-frequency high-power resonance inductor which comprises a shell and a magnetic core arranged in the shell, the magnetic core is arranged in the shell in a potting mode, the magnetic core comprises an upper E-shaped core and a lower E-shaped core matched with the upper E-shaped core, a plurality of clamping grooves are formed in the lower end of the upper E-shaped core, and the lower E-shaped core is arranged in the clamping grooves. A plurality of clamping grooves are formed in the upper end of the upper E-shaped core, a plurality of protrusions corresponding to the clamping grooves are arranged at the upper end of the lower E-shaped core, the upper E-shaped core and the lower E-shaped core are arranged in a matched mode through the protrusions and the clamping grooves, a coil is wound in an area defined by the upper E-shaped core and the lower E-shaped core, the coil is wound by a plurality of stranded wires, and the outer side of the shell is wrapped by a nanocrystalline magnetic shielding layer. The utility model has the beneficial effects that the upper E-shaped core and the lower E-shaped core are matched with each other, so that the magnetic core is convenient to mount and dismount, and the heat dissipation is convenient; a ferrite and amorphous alloy composite magnetic core is adopted, the high-frequency eddy current loss is reduced, meanwhile, the anti-saturation capacity is improved, the coil is formed by winding stranded wires, the alternating-current resistance can be reduced, and the skin effect can be reduced.

Description

Technical Field

[0001] This invention belongs to the field of electronic components technology, and is particularly suitable for a high-frequency, high-power resonant inductor. Background Technology

[0002] Inductors are components that convert electrical energy into magnetic energy and store it. They are widely used in wireless charging systems, photovoltaic inverters, and electric vehicle drive systems. Currently, when resonant inductors are used in high-frequency induction heating power supplies, they suffer from several problems, including increased surface current density due to high-frequency current, resulting in the skin effect; the core is a single unit, making disassembly inconvenient; and increased high-frequency eddy current losses. Utility Model Content

[0003] The purpose of this invention is to provide a high-frequency, high-power resonant inductor that reduces the skin effect, facilitates installation and disassembly, effectively reduces high-frequency electromagnetic interference, and is especially suitable for use in high-frequency induction heating power supplies.

[0004] The technical solution of this utility model is: a high-frequency, high-power resonant inductor, including a housing and a magnetic core disposed within the housing. The magnetic core is encapsulated within the housing. The magnetic core includes an upper E-shaped core and a lower E-shaped core that cooperates with the upper E-shaped core. The upper E-shaped core and the lower E-shaped core have the same structure. The upper E-shaped core includes an amorphous alloy composite magnetic core layer and a ferrite layer arranged sequentially from the inside to the outside. The lower end of the upper E-shaped core has multiple slots, and the upper end of the lower E-shaped core has multiple protrusions corresponding to the slots. The upper E-shaped core and the lower E-shaped core are configured to cooperate with the slots through the protrusions. A coil is wound in the area enclosed between the upper E-shaped core and the lower E-shaped core. The coil is wound with multiple strands of twisted wire. The coil has two leads, which pass through the holes at the lower end of the lower E-shaped core and the lower end of the housing, and are located on the outside of the housing. The outside of the housing is wrapped with a nanocrystalline magnetic shielding layer.

[0005] Preferably, the space between the outer casing and the magnetic core is encapsulated with epoxy resin.

[0006] Preferably, the gap between the upper E-shaped core and the lower E-shaped core is fixed by adhesive.

[0007] Preferably, the stranded wire consists of enameled copper wire, a polyimide layer, and an aluminum oxide composite insulation layer arranged sequentially from the inside out.

[0008] Preferably, mounting bases are provided at the lower ends of the outer two sides of the outer casing, and the top of the outer casing is open with a cap.

[0009] The advantages and positive effects of this utility model are as follows: due to the adoption of the above technical solution, the upper E-type core and the lower E-type core that cooperate with each other facilitate the installation and disassembly of the magnetic core and facilitate heat dissipation; the use of ferrite + amorphous alloy composite magnetic core reduces high-frequency eddy current loss and improves anti-saturation capability; the coil is made by winding stranded wire, which can reduce AC resistance, reduce skin effect and improve Q value. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a bottom view of the upper E-shaped core.

[0012] In the picture:

[0013] 1. Outer shell 2. Upper E-shaped core 3. Lower E-shaped core

[0014] 4. Slot 5. Coil 6. Pin

[0015] 7. Epoxy resin Detailed Implementation

[0016] Example

[0017] like Figure 1 , 2 As shown, the technical solution of this utility model is a high-frequency, high-power resonant inductor, including a housing 1 and a magnetic core disposed within the housing 1. The magnetic core is encapsulated within the housing 1. The magnetic core includes an upper E-type core 2 and a lower E-type core 3 that cooperates with the upper E-type core 2. The upper E-type core 2 and the lower E-type core 3 have the same structure. The upper E-type core 2 includes an amorphous alloy composite magnetic core layer and a ferrite layer arranged sequentially from the inside out. It adopts a ferrite + amorphous alloy composite magnetic core. The outer ferrite layer reduces high-frequency eddy current losses, and the inner amorphous alloy layer improves anti-saturation capability. The lower end of the upper E-type core 2 has multiple slots 4, and the upper end of the lower E-type core 3 has multiple protrusions corresponding to the slots 4. The upper E-type core 2 and the lower E-type core 3 are connected by the protrusions and the slots 4. The modular design of the detachable magnetic core facilitates installation and disassembly and facilitates heat dissipation.

[0018] A coil 5 is wound within the area enclosed between the upper E-type core 2 and the lower E-type core 3. The coil 5 is wound with multiple strands of twisted wire. The twisted wire reduces AC resistance, minimizes skin effect, and improves Q value. Two pins 6 are led out from the coil 5, and the two pins 6 pass through the hole at the lower end of the lower E-type core 3 and the hole at the lower end of the outer shell 1, and are located on the outside of the outer shell 1. The outside of the outer shell 1 is wrapped with a nanocrystalline magnetic shielding layer to reduce high-frequency electromagnetic interference.

[0019] In this embodiment, the outer shell 1 and the magnetic core are encapsulated with epoxy resin 7.

[0020] In this embodiment, the gap between the upper E-shaped core 2 and the lower E-shaped core 3 is fixed by adhesive.

[0021] Example 2

[0022] The stranded wire consists of enameled copper wire, a polyimide layer, and an aluminum oxide composite insulation layer arranged sequentially from the inside out.

[0023] In this embodiment, mounting seats are provided on the lower ends of the outer sides of the outer shell 1, and the top of the outer shell 1 is open, with a cover provided at the opening.

[0024] The working process and principle of this example: When maintenance is required, the cover can be opened and the upper E-type core can be removed. The capacitor is installed using a mounting bracket. The stranded wire, composed of enameled copper wire, a polyimide layer, and an alumina composite insulation layer, reduces AC resistance and minimizes the skin effect.

[0025] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A high frequency high power resonant inductor characterized by: The application relates to a magnetic core, which comprises a shell and a magnetic core arranged in the shell, the magnetic core is arranged in the shell by pouring, the magnetic core comprises an upper E-shaped core and a lower E-shaped core matched with the upper E-shaped core, the upper E-shaped core and the lower E-shaped core have the same structure, the upper E-shaped core comprises an amorphous alloy composite magnetic core layer and a ferrite layer arranged in sequence from inside to outside, a plurality of clamping grooves are arranged at the lower end of the upper E-shaped core, a plurality of protrusions corresponding to the clamping grooves are arranged at the upper end of the lower E-shaped core, the upper E-shaped core and the lower E-shaped core are arranged in a matched mode through the protrusions and the clamping grooves, a coil is wound in the region surrounded by the upper E-shaped core and the lower E-shaped core, the coil is wound by a plurality of twisted wires, the coil has two pins, the two pins pass through holes at the lower end of the lower E-shaped core and the lower end of the shell, and are arranged outside the shell, and a nanocrystalline magnetic shielding layer is wrapped outside the shell.

2. A high frequency high power resonant inductor as claimed in claim 1, wherein: The shell and the magnetic core are poured by epoxy resin.

3. A high frequency high power resonant inductor as claimed in claim 1, wherein: The gap between the upper E-shaped core and the lower E-shaped core is fixed by adhesive.

4. The high frequency high power resonant inductor of claim 1, wherein: The twisted wire comprises a lacquered copper wire, a polyimide layer and an aluminum oxide composite insulation layer arranged in sequence from inside to outside.

5. The high frequency high power resonant inductor of claim 1, wherein: Two mounting seats are arranged at the lower ends of the two sides of the shell, the top end of the shell is opened, and a cover is arranged at the opening.

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