Leakage flux*

Leakage flux is the part of magnetic flux that does not follow the intended magnetic path and does not fully link all turns of a winding or magnetic circuit. It depends on geometry of the magnetic system, air gaps, spacing between windings, and magnetic properties of surrounding materials.

Leakage flux is important for analysis of transformers, inductors, electric machines, magnetic shields, air-gap devices.

In QuickField, leakage flux can be analysed using DC Magnetics, AC Magnetics or Transient Magnetics.

References
Wikipedia: Leakage inductance
Britannica: Flux leakage

QuickField examples
Transformer leakage flux
Core reluctance of ferromagnetic core
Magnetic circuit with air gap

^* We do not guarantee that articles in the section "Glossary" are full and exact, and may be used as a reference of any kind. In fact - they are not! These are just informal hints, letting the students and amateurs better understand what is the specific term about. Experts should not read it at all! However, we will appreciate all expert recommendations about improving and extending our glossary.