Editing Flyback transformer (section)

== Construction ==
The primary is wound first around a [[ferrite rod]], and then the secondary is wound around the primary. This arrangement minimizes the [[leakage inductance]] of the primary. Finally, a ferrite frame is wrapped around the primary/secondary assembly, closing the magnetic field lines. Between the rod and the frame is an air gap, which increases the [[reluctance]].<ref name="AIR_GAP">{{cite magazine |last1=Billings |first1=Keith |title=Why have an air gap? |url=https://www.electronicdesign.com/content/article/21186397/why-have-an-air-gap |magazine=[[Electronic Design (magazine)|Electronic Design]] |access-date=2025-04-21 |date=2002-12-02}}</ref> The secondary is wound layer by layer with [[enameled wire]], and Mylar film between the layers. In this way, parts of the wire with a higher voltage difference have more dielectric material between them.