Selection of magnetic materials for transformers

In the transformer, the magnetic material is an important component, it is used in the magnetic circuit system of the transformer, and plays a role in the conduction of magnetic flux, the choice of materials on the transformer performance is very big, today this article introduces you to the selection of magnetic materials in the transformer.

Soft Magnetic Materials

Soft magnetic materials, are materials that have a very low magnetization strength and high permeability under the action of a magnetic field, and can be rapidly magnetized and demagnetized. Therefore, soft magnetic materials are widely used in transformers.

Manganese-zinc ferrite soft magnetic for transformers

In transformers with a magnetic flux density of 10,000 gauss or less, the use of soft magnetic materials is the best choice. This is because soft magnetic materials have low hysteresis loss and high permeability. In addition, soft magnetic materials are usually ferrite materials, which can be molded by cold rolling, hot rolling, cold drawing and other processing processes.

Hard Magnetic Materials

Hard magnetic materials, are materials that have a high magnetization strength under the action of a magnetic field and are able to remain magnetized for a long period of time. Hard magnetic materials are used in a wide range of applications such as permanent magnet materials, sensors, and electric motors.

In transformers, the use of hard magnetic materials is usually not the best choice because of their high hysteresis loss and coercivity. However, there are some situations where hard magnetic materials are needed, such as in high magnetic fields or high temperature environments where saturation occurs with soft magnetic materials, and hard magnetic materials can be used instead.

How to choose?

When selecting magnetic materials for transformers, factors such as their hysteresis loss and coercivity should be considered on a case-by-case basis. Generally speaking, soft magnetic materials are the best choice, but in some cases, hard magnetic materials are also required.

In addition, care should be taken to avoid choosing poor quality magnetic materials that may affect transformer performance. At the same time, attention should also be paid to the price of the material, as far as possible to choose cost-effective magnetic materials.

Conclusion;

In summary, the selection of magnetic materials for transformers should be based on the specific situation. In most cases, soft magnetic materials are the best choice, but in some special cases, hard magnetic materials are also needed to meet the performance requirements of the transformer.

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