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A transformer using an epoi-shaped multipurpose ferrite core

A ferrite core and transformer technology, applied in transformer/inductor cores, transformer/inductor parts, electrical components, etc., can solve the problem of poor heat and oxygen aging resistance, low mechanical strength, and long service life Short and other problems, achieve good magnetic shielding effect, maintain consistency, and improve reliability

Active Publication Date: 2017-04-05
山东嘉诺电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since transformers usually work at high temperatures, and materials such as rubber pads and rubber grooves used in transformers have poor thermal and oxygen aging resistance at high temperatures and short service life, in order to improve the thermal oxygen aging performance of materials, ternary components are usually used Ethylene Propylene Rubber as Rubber Material
However, although the existing EPDM synthetic materials have improved aging resistance, they still cannot meet the ideal requirements, and the mechanical strength is not high.

Method used

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  • A transformer using an epoi-shaped multipurpose ferrite core
  • A transformer using an epoi-shaped multipurpose ferrite core

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Embodiment 1

[0019] Such as figure 1 , shown, a kind of EPO I shape multi-purpose ferrite magnetic core, comprises two EPO shape magnetic cores and an I chip shape magnetic core and is combined, and described EPO shape magnetic core comprises bottom surface 11, center post 12 and side legs 13; the bottom surface 11 is a square, the cross-section of the central column 12 is oval, the side legs 13 are arc-shaped and surround the central column 12, and lead holes are left on both sides of the central column 12, and the central column 12 and I There is a gap between the sheets, and the distance between the two sides of the central column and the arc edge is the same.

[0020] In the present embodiment, while the total height of the EPOI shape multi-purpose ferrite core is 4mm, the bottom surface of the magnetic core is a square side length of 8mm, the central column of the magnetic core is elliptical, and the short of the elliptical The axis is 2.7mm and the major axis is 5.2mm.

[0021] Thi...

Embodiment 2

[0025] The above-mentioned EPDM rubber used in the transformer has the following weight ratio: 75 parts of EPDM, 10 parts of IIR, 15 parts of ultra-high molecular weight polyethylene, 1 part of anti-aging agent RD, 1 part of anti-aging agent BLE-W, 3 parts of zinc oxide 25 parts of white carbon black, 40 parts of magnesium hydroxide, 5 parts of zinc borate, 4 parts of paraffin oil, 1 part of Turkish red oil, 2 parts of microcrystalline wax, 3 parts of DCP, 1 part of vulcanizing agent Shuangwuwu, 1 part of soda ash parts, 0.5 parts of sulfur.

[0026] The vulcanization is carried out by the method of secondary vulcanization. The temperature of the first stage of vulcanization is 170°C~180°C, and the vulcanization time is 5'~10'; the temperature of the second stage vulcanization is 170°C, and the vulcanization time is 90'.

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Abstract

The invention provides an EPOI-shaped multifunctional ferrite magnetic core. The EPOI-shaped multifunctional ferrite magnetic core comprises two EPO-shaped magnetic core bodies and an I-shaped magnetic core body in a combined mode. According to the EPOI-shaped multifunctional ferrite magnetic core, two windings are arranged on one magnetic core for outputting and used as two inductors at the same time, and miniaturization of a magnetic device and a power source can be achieved; in addition, as the net sectional areas of the portions of a magnetic circuit of the magnetic core are even, the coincidence of magnetic flux densities of all the portions can be kept, the phenomena that as local magnetic flux densities are excessively high, excessively-high magnetic core losses are caused, and temperature-rising hot spots are generated accordingly can be avoided, and the reliability of the device and the reliability of the power source are improved. The invention further provides a transformer with the magnetic core.

Description

technical field [0001] The invention relates to a manganese-zinc soft ferrite core and a transformer using the core, in particular to an EPOI-shaped multipurpose ferrite core. Background technique [0002] The common ferrite cores used in miniaturized switching power supplies or DC-DC converter transformers are large in size and high in installation height. There are contradictions that are difficult to balance in the convenience of multi-winding outlets and magnetic shielding. Well adapt to the current development trend of miniaturization, thinning, high power density and good electromagnetic compatibility of electronic products; [0003] A switching power supply device includes discrete devices such as transformers, inductors, and filters, and the main components of these devices are ferrite cores. The existing EE, EI, and ER cores are the most commonly used shapes. The core occupies most of the volume of the device. At the same time, because these cores have openings on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/00H01F27/24C08L23/16C08L23/22C08L23/06C08L91/06C08K13/02
CPCC08L23/16C08L2205/025C08L2205/035C08L2207/068H01F27/00H01F27/24C08L23/22C08L23/06C08L91/06C08K13/02
Inventor 王传礼王传伟
Owner 山东嘉诺电子有限公司
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