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An air coil inductor, or air core inductor, is an inductor without a magnetic core, but rather unsupported with only air inside of the coil. Coils are generally produced with copper material, insulated wire, stripped and non-stripped ends, and tinned or bare ends.
In a certain magnetic field, using a coil to cut through the magnetic lines of force can convert the same magnetic field into electrical energy. This principle of electromagnetic conversion is utilized to create devices such as relays, motors, generators, wireless equipment, and speakers. The coil can be made from conductive materials like copper, iron, aluminum, gold, and other metals. To enhance the magnetic field, a magnetic core can be inserted into the center of the coil. When the coil’s center consists of a plastic framework or has no core at all, it forms an air-core coil. Air-core coils are widely used and are designed in various shapes such as circular, square, elliptical, and many other irregular forms to meet diverse needs.
An air-core coil is composed of two parts: the air and the coil itself. The term “air core” implies that there is nothing in the center. The coil refers to wires that are wound together, and these wires are insulated from each other.
When current flows through the wire, a magnetic field is generated around the coil. The strength of the magnetic field is proportional to both the current flowing through the coil and the number of turns in the coil.
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