How to minimize magnetostriction in electrical transformers?

Magnetostriction is a phenomenon that involves the mechanical deformation of ferromagnetic materials when subjected to a magnetic field. Although magnetostriction is present in transformers, it is not considered normal or desirable as it can lead to mechanical vibrations and noise, impacting the performance and efficiency of the transformer.

To minimize magnetostriction in transformers, several techniques can be employed. One approach involves selecting transformer core materials with low magnetostrictive properties. Utilizing materials such as amorphous alloys or certain types of steel can help mitigate the effects of magnetostriction. Additionally, optimizing the design of the transformer core, including its shape and dimensions, can contribute to reducing magnetostrictive vibrations.

Moreover, the application of stress-relief techniques, such as stress annealing or introducing mechanical damping structures, can be effective in minimizing magnetostriction. These methods aim to alleviate internal stresses within the transformer core, consequently reducing the magnetostrictive response.