This is a core type transformer in which the windings are wound on a non-magnetic strip. The magnetic flux linkages are made through air as corebetween the primary and secondary. The following image shows an air-core transformer.
Advantages
- The hysteresis and eddy current losses are low in these Air core transformers.
- Noise production is low.
Disadvantages
- The reluctance is high in Air core transformers.
- Mutual inductance is low in Air core compared to Iron-core transformers.
Applications
- Audio frequency transformers.
- High frequency radio transmissions.
