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A low-loss vehicle-mounted transformer

A transformer and low-loss technology, applied in the field of low-loss vehicle-mounted transformers, can solve problems such as difficult to control inductance, leakage inductance, and large loss, and achieve the effects of compact structure, easy control, and stable structure

Pending Publication Date: 2018-12-14
DONGGUAN DAZHONG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional transformers use the method of opening an air gap in the magnetic core to adjust the inductance, but it is difficult to control the inductance and leakage inductance in this way, and the loss is large

Method used

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  • A low-loss vehicle-mounted transformer
  • A low-loss vehicle-mounted transformer
  • A low-loss vehicle-mounted transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0040] The difference between this embodiment and Embodiment 1 is that in the present invention, the upper magnetic core 2 and the lower magnetic core 3 are both ferrite magnetic cores, and the ferrite magnetic core is composed of the following raw materials in weight percentage:

[0041]

[0042] Further, the ferrite core of the present invention is made through the following steps:

[0043] (1) Ball milling: measure Fe according to the formula 2 o 3 , Mn 3 o 4 , ZnO, Al 2 o 3 and MgO are mixed and then dry ball milled to obtain the main powder;

[0044] (2) Pre-burning: heat up the main powder obtained in step (1) to 915° C., and keep it warm for 1.7 hours to obtain pre-fired material;

[0045] (3) Granulation: the main powder obtained in step (2) and CuO, SrO, CoO, Y 2 o 3 、 Bi 2 o 3 、TiO 2 、Cr 2 o 3 Adding it into the PVA aqueous solution, performing wet ball milling, and then performing spray granulation to obtain magnetic powder, the mass fraction of the ...

Embodiment 3

[0049] The difference between this embodiment and Embodiment 1 is that in the present invention, the upper magnetic core 2 and the lower magnetic core 3 are both ferrite magnetic cores, and the ferrite magnetic core is composed of the following raw materials in weight percentage:

[0050]

[0051]

[0052] Further, the ferrite core of the present invention is made through the following steps:

[0053] (1) Ball milling: measure Fe according to the formula 2 o 3 , Mn 3 o 4 , ZnO, Al 2 o 3 and MgO are mixed and then dry ball milled to obtain the main powder;

[0054] (2) Pre-burning: heat up the main powder obtained in step (1) to 900° C., keep it warm for 1 hour, and obtain the pre-fired material;

[0055] (3) Granulation: the main powder obtained in step (2) and CuO, SrO, CoO, Y 2 o 3 、 Bi 2 o 3 、TiO 2 、Cr 2 o 3 Adding it into the PVA aqueous solution, performing wet ball milling, and then performing spray granulation to obtain magnetic powder, the mass fract...

Embodiment 4

[0059] The difference between this embodiment and Embodiment 1 is that in the present invention, the upper magnetic core 2 and the lower magnetic core 3 are both ferrite magnetic cores, and the ferrite magnetic core is composed of the following raw materials in weight percentage:

[0060]

[0061] Further, the ferrite core of the present invention is made through the following steps:

[0062] (1) Ball milling: measure Fe according to the formula 2 o 3 , Mn 3 o 4 , ZnO, Al 2 o 3 and MgO are mixed and then dry ball milled to obtain the main powder;

[0063] (2) Pre-burning: the main powder obtained in step (1) is heated up to 930° C., and kept for 2.5 hours to obtain pre-fired material;

[0064] (3) Granulation: the main powder obtained in step (2) and CuO, SrO, CoO, Y 2 o 3 、 Bi 2 o 3 、TiO 2 、Cr 2 o 3 Add it into the PVA aqueous solution, perform wet ball milling, and then carry out spray granulation to obtain magnetic powder, the mass fraction of the PVA aqueou...

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Abstract

The invention relates to the technical field of transformers, in particular to a low-loss vehicle-mounted transformer. The transformer comprises a bottom plate, an upper magnetic core, a lower magnetic core, a skeleton, an upper winding and a lower winding. The upper magnetic core is connected with the lower magnetic core through the skeleton; The lower magnetic core is connected with the bottom plate; The skeleton comprises an upper wire groove, a lower wire groove and an air gap groove arranged between the upper wire groove and the lower wire groove. The upper winding is wound on the upper wire groove; The lower winding is wound on the lower wire groove; The air gap groove is provided with a plurality of isolation bars; As the air gap groove is reserved on the skeleton and the isolationbars are arranged in the groove, the air gap groove integrally forms a hollowed-out structure, and compared with a traditional method of arranging an air gap in a magnetic core, the eddy current lossis reduced, the temperature rise is reduced, and the inductance and the leakage inductance are conveniently controlled.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a low-loss vehicle-mounted transformer. Background technique [0002] The traditional transformer adopts the method of opening an air gap in the magnetic core to adjust the inductance, but it is difficult to control the inductance and leakage inductance in this way, and the loss is large. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned shortcomings, and to provide a low-loss vehicle-mounted transformer. By reserving an air gap groove on the frame, and setting a spacer in the groove, the air gap groove is a hollow structure as a whole, which is relatively Compared with the traditional method of opening an air gap in the core, the air gap groove is used, the structure is more stable, the inductance and leakage inductance are easy to control, the structure is more compact, the eddy current loss is reduced, and the tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/26H01F27/06H01F1/34H01F41/02
CPCH01F1/344H01F27/06H01F27/266H01F41/0246
Inventor 文成波李正中李经伟
Owner DONGGUAN DAZHONG ELECTRONICS