At present, the quality of magnetic cores in the market varies greatly, and the core gap is due to different raw material selection. Magnetic cores produced from new high-quality raw materials and secondary recycled materials have huge differences in performance, lifespan, and stability. Some small factories use recycled silicon steel sheets and inferior strip materials to produce magnetic cores in order to reduce costs. The products have problems such as high loss, unstable magnetic permeability, large size deviation, and easy heating and aging, which can easily cause terminal equipment failures. Legitimate source manufacturers adhere to strict selection of authentic raw materials. The silicon steel core uses new and high-quality silicon steel raw materials, and the amorphous and nanocrystalline materials use top-notch brand original strip materials to eliminate quality hazards from the source. The magnetic core produced from new raw materials has high consistency in parameters, low loss, and long-lasting stable performance, which can meet the long-term operation needs of high-end equipment and effectively avoid additional costs such as equipment repair and shutdown in the later stage.