What is a toroidal inductor?

Can suppress high-frequency signals. The magnetic ring plus the wire passing through it is equivalent to increasing the inductance of the wire to a certain extent, which is similar to inductance. The magnetic ring has a high loss coefficient, which can convert high-frequency electromagnetic energy into thermal energy through eddy currents, thus inhibiting the passage of high-frequency signals. It belongs to the category of loss filters. A general inductor converts electrical energy into magnetic field energy and stores it without consuming it.