Magnetic core and transformer comprising same

Abstract

The invention discloses a magnetic core and a transformer comprising the same. The magnetic core is used for the transformer and comprises two side legs, a middle column, a magnetic core unit, a U-shaped groove and a gap part. The U-shaped groove is positioned at the top of the magnetic core unit and extends along a height direction of the magnetic core unit; the U-shaped groove is provided with amiddle connection part and two bent parts; and the U-shaped groove divides the magnetic core unit into a first part, a second part, a third part and a fourth part. The middle connection part forms the gap part. The first part and the third part are positioned at both sides of the middle connection part, the third part is positioned between two bent parts, and the third part forms the middle column. The second part and the fourth part are positioned outside the two bent parts, and the second part and the fourth part form two side legs. The middle column does not need to be milled on the magnetic core unit so as to avoid consumption on labor and equipment and benefit to cost reduction and environment protection. The first part, the second part, the third part and the fourth part form a complete closed magnetic path, so that the magnetic core is difficult to cause magnetic flux leakage.

Description

technical field [0001] The invention relates to the field of transformers, in particular to a magnetic core and a transformer containing it. Background technique [0002] At present, in the actual production process of soft ferrite cores used in transformers, gap processing is required. The way to form the gap is generally to use a grinding wheel to grind down the size of the center column of the magnetic core, while the size of the legs on both sides of the magnetic core remains unchanged. The purpose of grinding down the center column is to adjust the inductance of the transformer. The magnetic core in the prior art usually includes two magnetic core units, and the two magnetic core units are combined to form a pair of magnetic cores with a good gap. In addition, there are also single-gap magnetic cores, that is, the center column of one core unit is not ground down, and the center column of the other core unit is ground down. Among them, on the one hand, due to the need...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a magnetic core and a transformer containing it in order to overcome the defects of high cost, easy to pollute the environment and easy to leak magnetic flux in the magnetic core in the prior art.

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