Tandem magnetic integrated inductor
Through the series-connected magnetic integrated inductor design and the shared return magnetic core, the eddy current loss and noise problems caused by laminated material cutouts and air gap openings in high-power inductors are solved, and a low loss, low noise and low cost inductor design is achieved.
Patent Information
- Application Number
- CN202421682756.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In high-power inductors, cut-out processing and air gap opening of laminated materials lead to increased eddy current losses, noise generation and cost difficulties.
The series-connected magnetic integrated inductor design is adopted, and several basic structure combinations are connected in series along the axis of the central column, and a magnetic flux circuit is formed by using a common return core to avoid laminated material cutouts and air gap openings.
Reduces core loss and noise, simplifies the manufacturing process, reduces costs, and improves the durability of the inductor.
Smart Images
Figure CN223038740U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an inductor. Background Art
[0002] In high-power inductors, traditional laminated materials such as amorphous nanocrystalline tapes or silicon steel sheets are widely used for their advantages of high magnetic permeability and high saturation magnetic induction intensity. After these materials are made into inductors, in order to ensure the required inductance under a large current, it is inevitable to set an air gap in the laminated material, such as common amorphous UU-type inductors or silicon steel sheet-type three-phase three-column or three-phase five-column inductors. This will bring the following problems: 1. Since the magnetic permeability of the laminated magnetic material is much greater than that of air, the magnetic flux enters and exits the magnetic core vertically, and a large eddy current loss will be generated on the laminated plane. Therefore, opening an air gap in the laminated magnetic core will greatly increase the magnetic core loss. When applying amorphous nanocrystalline and other materials with an air gap, the actual magnetic core loss will far exceed the theoretical value. 2. When processing the laminated material with a cut, problems such as interlayer peeling and chip adhesion caused by fragments need to be overcome, resulting in ineffective cost reduction. 3. The cut destroys the integrity of the laminated magnetic core and is prone to generate additional noise, which is often difficult to overcome. These are all technical problems that need to be solved urgently. In the design of high-power power supplies, such as in multi-path parallel high-power boost circuits and three-phase AC inverter circuits, high-power inductors are required to achieve their functions. In these applications, currently, the vast majority of solutions use an independent inductor for each path to achieve the circuit function. In such application scenarios, adopting an integrated inductor solution can not only reduce costs, but also the magnetic fluxes of the iron cores shared by the inductors can cancel each other out, reducing the iron core loss. Content of the Utility Model
[0003] In order to reduce costs, the noise caused by the cut of the laminated material, and the device loss, the utility model provides a series-connected magnetic integrated inductor. The technical solution of the utility model is as follows: there are several basic structure combinations. Each combination has two middle columns, two protective shells, and a toroidal magnetic core. The middle column consists of a middle column magnetic core and a winding structure; the two middle columns are arranged with parallel axes, and a protective shell is respectively installed and fixed at both ends so that the middle column magnetic core passes through the installation hole of the protective shell. The toroidal magnetic core is installed on one end of the protective shell and on the other surface opposite to the winding structure, so that the toroidal magnetic core contacts the magnetic core; these several basic structure combinations are successively connected end to end along the axial direction of the middle column, and adjacent basic structure combinations share a toroidal magnetic core to form a magnetic flux loop.
[0004] The beneficial effects of the present utility model are as follows: The present utility model uses a square-shaped strip winding and laminating method to avoid the need for cutting the lamination material and creating air gaps in the lamination material. There is a gap left in the middle of the square-shaped strip winding and laminating, which is convenient for strip winding; moreover, the manufactured inductor device can withstand a large current, is simple to manufacture, and has a low cost; the design of using a hybrid material and the absence of air gaps in the lamination material enables the core loss to reach an optimal level; the magnetic circuit integrated design reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0005] Figure 1 FIG. is a schematic structural diagram of the basic structure combination of the present utility model;
[0006] Figure 2 FIG. is a schematic structural diagram of an embodiment of the present utility model.
[0007] In the figures,
[0008] 1: Middle column
[0009] 11: Middle column core
[0010] 12: Winding structure
[0011] 13: Axial direction of the middle column
[0012] 2: Protective shell
[0013] 21: Mounting hole
[0014] 3: Square-shaped core DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] As Figure 1 described, the present utility model has several basic structure combinations. Each combination has two middle columns 1, two protective shells 2, and one square-shaped core 3. The middle column 1 is composed of a middle column core 11 and a winding structure 12; the two middle columns 1 are arranged in parallel along the axial direction 13 of the middle column, and one protective shell 2 is installed and fixed at each end such that the middle column core 11 passes through the mounting hole 21 of the protective shell 2. The square-shaped core 3 is installed on one end of the protective shell 2 and on the other surface opposite to the winding structure 12, such that the square-shaped core 3 is in contact with the middle column core 11; these several basic structure combinations are connected end to end in sequence along the axial direction 13 of the middle column, and adjacent basic structure combinations share one square-shaped core 3 to form a magnetic flux circuit.
[0016] As Figure 2 shown in the embodiment, the number of the basic structure combinations is three. According to actual applications, the number of the basic structure combinations can be any number for series assembly.
[0017] The above specific embodiments are merely exemplary and are intended to enable those skilled in the art to better understand this patent, and should not be construed as limiting the scope of this patent; any change or modification that is substantially the same or equivalent in technical content made based on the technical solutions disclosed in this patent falls within the scope of this patent.
Claims
1. A series-connected magnetic integrated inductor, characterized in that: A plurality of basic structure assemblies are provided, the assembly comprising two middle columns (1), two protective shells (2) and two circular magnetic cores (3), the middle column (1) comprising a middle column magnetic core (11) and a winding structure (12); the axis directions (13) of the two middle columns (1) are arranged in parallel, a protective shell (2) is respectively installed and fixed at both ends so that the middle column magnetic core (11) passes through the installation hole (21) of the protective shell (2), the circular magnetic core (3) is installed on one end of the protective shell (2) and on the other side opposite to the winding structure (12), so that the circular magnetic core (3) contacts the middle column magnetic core (11); the plurality of basic structure assemblies are sequentially connected end to end along the axis direction (13) of the middle column; adjacent basic structure assemblies share a circular magnetic core (3) to form a magnetic flux loop.