what is air core transformer?

Answer 1

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THE COMPONENTS OF A TRANSFORMER

Two coils of wire (called windings) are wound on some type of core material. In some cases the coils of wire are wound on a cylindrical or rectangular cardboard form. In effect, the core material is air and the transformer is called an AIR-CORE TRANSFORMER. Transformers used at low frequencies, such as 60 hertz and 400 hertz, require a core of low-reluctance magnetic material, usually iron. This type of transformer is called an IRON-CORE TRANSFORMER. Most power transformers are of the iron-core type. The principle parts of a transformer and their functions are:

The CORE, which provides a path for the magnetic lines of flux.
The PRIMARY WINDING, which receives energy from the ac source.
The SECONDARY WINDING, which receives energy from the primary winding and delivers it to the load.
The ENCLOSURE, which protects the above components from dirt, moisture, and mechanical damage.

Answer 2

Air core trsnsformers are the high-frequency transformers which may also use air cores. These eliminate the loss due to hysteresis in the core material. Such transformers maintain high coupling efficiency (low stray field loss) by overlapping the primary and secondary windings.

Answer 3

An air core transformer is designed to be used at a high frequency, used in radio circuits. The currents are usually small but the voltages can very. They can be used to change voltages, match one stage to an other, for matching antennas to the radio circuit. They have many uses with in a radio.
As the name describes they they consist of wire wound around something non- magnetic. Paper, plastic or ceramic may be the form that they are rapped around. Other transformers are simple loops of wire forming a long spiral with an additional loop of wire rapped in parallel to the original coil. Sometimes one coil is inside the other coil.

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Answer 4

in this type windig not have any support of any subtance.