induction coil

induction coil

n.

A transformer, often used in automotive ignition systems, in which an interrupted, low-voltage direct current in the primary is converted into an intermittent, high-voltage current in the secondary.

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induction coil

Noun

a transformer for producing a high voltage from a low voltage. It consists of a soft-iron core, a primary coil of few turns, and a concentric secondary coil of many turns

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induction coil

1. An electrical device consisting of a single coil of conductive material, often surrounding a metallic core, designed to establish a strong magnetic field around the coil. Changes in the current flow through the coil cause fluctuations in the magnetic field that induce a voltage across the coil. Induction coils have many applications, especially in circuits that tune to signals of specific frequencies, as in radios. The ability of an induction coil to induce a voltage is called inductance, and is measured in henrys. Compare capacitor.

2. A type of transformer that changes a low-voltage direct current to a high-voltage alternating current. Induction coils are used for many purposes, especially as spark coils for firing spark plugs in automobile engines and starting oil burners.

Thesaurus

Noun

1.

induction coil - a coil for producing a high voltage from a low-voltage source coil - reactor consisting of a spiral of insulated wire that introduces inductance into a circuit ignition coil - an induction coil that converts current from a battery into the high-voltage current required by spark plugs spark coil - an induction coil used to create sparks spark gap - the gap between two high-potential terminals transformer - an electrical device by which alternating current of one voltage is changed to another voltage