The term “air core coil” describes an inductor that does not use a magnetic core made of a ferromagnetic material. The coils are wound on plastic, ceramic, or other nonmagnetic forms, as well as those that actually have air inside the windings.
- lower inductance than ferromagnetic core coils
- are often used at high frequencies because they are free from energy losses called
- core losses that occur in ferromagnetic cores, which increase with frequency.
Air Core: Side effect
Inductance of the coil may change due to mechanical vibrations because the coil is not rigidly supported by a coil form.