Toroidal trasformer

A transformer is a device which transfers electric energy from an electric circuit to another one through some conductors inductively paired: transformer envelopments. A variable electric current in the primary envelopment creates a magnetic flux which can be variable in the nucleus of the transformer and consequently creates a magnetic domain which can vary through the secondary envelopment. Toroidal transformers are developed around an annular centre which depends on the frequency of  functioning and is made of a long silicon steel metal streep or permalloy (nickel-iron magnetic alloy).

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