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Magnetic element with pre-biased magnet and manufacture method

A technology of magnetic components and manufacturing methods, applied in the direction of inductance with magnetic cores, inductance/transformer/magnet manufacturing, electrical components, etc., can solve the problems of inconvenient assembly, increased volume, etc., to achieve convenient assembly and avoid demagnetization Effect

Active Publication Date: 2013-10-23
SANTAK ELECTRONICS SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned magnetic elements with pre-biasing increase the volume occupied by the inductor, and additional fixing elements are required to fix the permanent magnet and the magnetic core, which is inconvenient to assemble

Method used

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  • Magnetic element with pre-biased magnet and manufacture method
  • Magnetic element with pre-biased magnet and manufacture method
  • Magnetic element with pre-biased magnet and manufacture method

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Embodiment Construction

[0044] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0045] An inductor in the prior art such as Figure 3a As shown, the inductor 100 includes a central column 103 and a side column 104, the side column 104 forms a closed frame structure with an inner opening, and the central column 103 connects two opposite sides of the frame structure to separate the inner opening into two parts. The winding 102 is wound on the central column 103 of the inductor 100, and an air gap 101 is opened at the junction of the central column 103 and the side column, and the two parts communicate with the two parts of the inner opening respectively.

[0046] After the winding 102 of the i...

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PUM

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Abstract

The invention provides a magnetic element with a pre-biased magnet. The magnetic element with the pre-biased magnet comprises a magnetic core provided with air gaps, a winding wound on the magnetic core and a permanent magnet located in a magnetic circuit of the magnetic core, wherein the magnetic field direction produced by the permanent magnet in the magnetic circuit is opposite to the magnetic field direction produced by winding current in the magnetic circuit. When the winding current is zero, the magnetic field intensity produced by the permanent magnet in the magnetic circuit does not exceed the saturation flux density of the magnetic core. The magnetic core is provided with a groove, the selected groove position enables a magnetic field produced by the winding to have a minimum value at the position. The permanent magnet is located in the groove. The permanent magnet produces small eddy current, so that demagnetization of the permanent magnet due to overheat can be avoided. In addition, the magnetic element is small in volume and convenient to assemble.

Description

technical field [0001] The invention relates to a magnetic element, in particular to a magnetic element with pre-bias and a manufacturing method thereof. Background technique [0002] In the prior art, the DC reactor, the DC inductor and the flyback transformer all work in the first quadrant of the magnetization curve. In order to withstand a certain DC, these magnetic components generally need to open an air gap; because opening an air gap will lead to a decrease in the effective permeability of the magnetic circuit, so in order to solve the contradiction between increasing the inductance and improving the DC resistance, the general method is to increase Large core volume, resulting in increased volume and cost. In order to solve the above problems, such as Figure 1a As shown, the working range of the magnetization curve of the above-mentioned magnetic element can be extended to the first and third quadrants, which will increase the DC resistance and avoid increasing the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F17/04H01F27/24H01F41/02
Inventor 郑庆杰谢芳孙永杰
Owner SANTAK ELECTRONICS SHENZHEN