Commonly used transformer cores are generally made of silicon steel sheet. Silicon steel is a silicon-containing (silicon, also known as yttrium) steel with a silicon content of 0.8 to 4.8%. The core of the transformer made of silicon steel is because the silicon steel itself is a magnetic material with strong magnetic permeability. In the energized coil, it can produce large magnetic induction, which can make the transformer smaller in size.
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