Amorphous alloy delta transformer core

Abstract

The invention relates to an amorphous alloy delta transformer core. The amorphous alloy delta transformer core is formed by vertically butting three identical core columns with upper and lower yokes, wherein the core columns are formed by winding amorphous alloy strips, and the cross section of each core column is circular; and the upper and lower yokes are identical triangular frames formed by winding amorphous alloy strips equal in width. A transformer manufactured from the amorphous alloy delta transformer core has the advantages of small iron loss, low noise, less material consumption, good short circuit impact property and the like.

Description

technical field [0001] The invention relates to a transformer iron core, in particular to an amorphous alloy triangular transformer iron core. Background technique [0002] Existing three-phase amorphous alloy transformer iron cores all adopt four-frame and five-column structures or three-frame and three-column structures, and the cross-section of the iron core columns is rectangular. In order to fit the transformer coil, each layer of the iron yoke at one end of the single-frame iron core needs to be disconnected to form an oblique seam. When assembling the coil, each layer of the iron yoke is opened one by one at the disconnection, and the coil is fitted on the iron core column. Then close them one by one, and glue the seams with special glue. [0003] This iron core structure has many disadvantages. First, the rectangular cross-section of the iron core post consumes 11.4% more copper than the circular cross-section under the same number of coil turns; secondly, because o...

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Problems solved by technology

[0003] This iron core structure has many disadvantages. First, the rectangular cross-section of the iron core post consumes 11.4% more copper than the circular cross-section under the same number of coil turns; secondly, because one end of each single-frame iron core The iron yokes are disconnected, forming oblique seams, the magnetic resistance increases, and the no-load loss of the iron core increases accordingly. When the transformer is running, under the action of the AC magnetic field, the seams are likely to cause low-frequency vibrations, resulting in large noise

In addition, the magnetic flux density in the iron yoke of this iron core is 1.155 times the magnetic flux density in the iron core column, so it also leads to an increase in the no-load loss of the iron core

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