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    Transformer core loss control
  • Control of transformer core loss

    The no-load loss in the transformer loss, that is, the iron loss, occurs mainly in the laminated iron core of the transformer, mainly due to the loss caused by the magnetic flux and eddy current generated by the alternating magnetic field lines.

    The earliest material used for the transformer core is soft wrought iron which is easy to magnetize and demagnetize. The transformer core is made of iron wire instead of monolithic iron, in order to overcome the reluctance caused by periodic magnetization in the magnetic circuit. Loss and eddy currents due to the core being cut by alternating flux. An iron core made of a wire harness can be used to reduce the cross-sectional area of the eddy current path.

    Around 1900, it was found that the participation of a small amount of silicon or aluminum in iron can greatly reduce the magnetic path loss, increase the magnetic permeability, and increase the resistivity, and the eddy current loss decreases. After repeated improvements, a 0.35 mm thick silicon steel sheet was used instead of the iron wire to make a transformer core.

    In recent years, countries all over the world are actively researching and producing energy-saving materials. The core material of transformers has been developed to the latest energy-saving material, amorphous magnetic material 2605S2, and amorphous alloy iron core transformers have emerged. Using the transformer manufactured by 2605S2, the iron loss is only 1/5 of the silicon steel transformer, and the iron loss is greatly reduced.

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