Integrated magnetic structure

Abstract

The invention discloses an integrated magnetic structure, and belongs to the technical field of electromagnetism. The integrated magnetic structure comprises a horizontal magnetic core shaped like a Chinese character Ri, first and second side column windings wound on a left side column, third and fourth side column windings wound on a right side column and a middle column winding wound on a middle column, wherein the first and third side column windings are connected and forwards coupled; the second and fourth side column windings are connected and forwards coupled. When the integrated magnetic structure is applied to the integration of a transformer and an inductor, magnetic flux generated by a winding of the inductor passes through a magnetic circuit of the transformer, so that a magnetic core material can be fully utilized, and the size of a magnetic core can be reduced; when the integrated magnetic structure is applied to the integration of a common mode choke and a differential mode choke, magnetic flux generated by a winding of the differential mode choke passes through the common mode choke part, so that the whole magnetic core is fully utilized, and the size of a filter is reduced; moreover, the common mode choke and the differential mode choke are decoupled, and can be independently regulated without influence.

Description

technical field [0001] The invention belongs to the field of electromagnetic technology and relates to a magnetic integration structure. Background technique [0002] In many fields such as aerospace, electric vehicles, and photovoltaic power generation, high-power power electronic converters are indispensable components. How to effectively reduce the volume of magnetic components, increase power density, improve conversion efficiency, and improve electromagnetic interference (EMI) is not only related to the normal operation of the converter itself, but also related to the optimization of the overall performance of the system and the improvement of energy utilization efficiency. Improve and control the stable and reliable operation of the part. Integrating the transformer and inductor in the converter and the differential mode and common mode inductors in the filter can reduce the overall volume of the magnetic components and increase the power density of the power electron...

AI Technical Summary

Problems solved by technology

This structure can realize the decoupling integration of the inductor and the transformer. The disadvantage is that in the actual use process, the transformer part of the magnetic core usually does not contain a DC magnetic flux component, but there will be a large AC magnetic flux component. In order to control the loss of the transformer , the AC flux component will be limited, and the limit value is usually much lower than the saturation value of the core material, resulting in insufficient use of the core of the transformer; while the inductance part contains a large DC flux component, in order to prevent this part of the The magnetic core is saturated, and it is necessary to increase the air gap 36 or increase the cross-sectional area of ​​the magnetic core in the inductance part. In high-power applications, the loss and volume of this structure increase significantly

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