Transformers. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Electricity for beginners
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A transformer is a device by which alternating current of one voltage is transformed into alternating current of another voltage. The device of the transformer is based on the phenomenon of electromagnetic induction.
The transformer is a closed steel core made of plates. Two coils with wire windings having a different number of turns are fixed on the core. Windings have low resistance and high inductance.
Transformers are step-up and step-down. In the first case, the secondary winding has a larger number of turns, in the second - less. The transformer is the most optimal device for energy conversion. The efficiency of modern powerful transformers sometimes reaches 94-99%.
Author: Smirnova L.N.
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