How to Reduce Noise of Transformer Core?

Transformers produce noise during operation. The source of transformer noise is magnetostriction of iron core silicon steel sheet, or the noise of transformer core is basically caused by magnetostriction. Magnetostriction refers to the increase of the size of the silicon steel sheet along the magnetic induction line when the iron core is excited. The size of the silicon steel sheet decreases in the direction perpendicular to the magnetic induction line, which is called magnetostriction. In addition, the structure and geometric size of the iron core, and the processing and manufacturing technology of the iron core will have a certain degree of influence on the noise level.

The noise level of the iron core can be reduced by the following technical measures:

(1)Use high quality silicon steel sheet with small magnetostrictive ε value.

(2) Reduce the magnetic flux density of the core.

(3) Improve the structure of the iron core.

(4) Choose a reasonable core size.

(5) Adopt advanced processing technology.