Magnetvälju
Magnetvälju, or magnetic leakage, refers to stray magnetic flux that escapes from a magnetically closed circuit or device into the surrounding space. In an ideal magnetic circuit, all flux would follow the intended path, but real materials and geometries introduce imperfections that create high-reluctance paths such as air gaps, joints, cracks, or material inhomogeneities. The result is a portion of the flux that does not contribute to the desired magnetic effect and instead appears as an external stray field.
Causes of magnetvälju include mechanical clearances in assemblies, partial saturation of ferromagnetic parts, temperature-dependent changes in
In engineering practice, leakage is quantified in concepts such as leakage inductance in electrical machines, or
Mitigation focuses on closing the magnetic circuit and reducing reluctance along unintended paths. Methods include using