Low-alternating-current copper loss planar magnetic part winding for power electronic converter

Abstract

The invention discloses a planar magnetic part winding with low alternating current copper loss for a power electronic converter. The planar magnetic part winding comprises a magnetic core and a winding, the magnetic core is provided with a cavity, the winding is formed by horizontally surrounding a planar winding sheet, and the winding is arranged in the cavity; a plurality of layers of plane winding sheets are arranged in the winding, the layer closest to the zero magnetomotive force position serves as the first layer of winding, and the layer numbers of the winding are gradually increased in sequence as the winding layer is far away from the zero magnetomotive force position; the number of turns of the nth layer of winding is greater than or equal to the number of turns of the mth layer of winding. According to the invention, the loss caused by the proximity effect between the windings can be reduced, so that the alternating-current copper loss of the magnetic part is reduced.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a winding with low AC copper loss for a planar magnetic part of a power electronic converter. Background technique [0002] Magnetic parts are an important part of power electronic converters, and almost all power circuits require magnetic parts. Planar magnetics can be divided into planar inductors and planar transformers. In recent years, with the continuous development of PCB technology and the deepening of the trend of high frequency and miniaturization of power electronics, planar magnetic parts have been favored by virtue of their advantages of low cost, controllability, good consistency, small size, and the ability to realize complex structures. It is widely used in small and medium power power electronic converters. [0003] Due to the existence of insulating layers such as FR4 inside the PCB winding, the utilization rate of the window of the plana...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a low AC copper loss planar magnetic winding for power electronic converters to solve the problem of high AC copper loss in planar magnetic parts, especially planar inductance. The method has the advantages of reducing AC copper loss, reducing The advantages of small PCB layers and processing costs, increasing power density

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