An inductor typically consists of wire coiled around a core, with current creating a magnetic field that expands and stores energy. When the current stops or changes, the field collapses, releasing the stored energy and opposing the change in current. Inductors are used for filtering high-frequency noise, storing energy in power converters, and creating resonant circuits, like in DC-DC converters or common mode filters for digital interfaces.
In an electrical context, a choke is type of inductor designed to “choke” or block high-frequency alternating current (AC) while allowing direct current (DC) and lower-frequency AC to pass through it. It consists of a coil of insulated wire, often wound around a magnetic core, and its primary function is to filter unwanted high-frequency electrical noise or ripples from a circuit. Common applications include filtering in power supplies, noise suppression in audio systems, and protection in motor drive systems to extend cable lengths.
