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Near Magnetic Field Assessment and Reduction for Magnetic Inductors With Magnetic Moment Analysis
IEEE Transactions on Power Electronics  (IF6.153),  Pub Date : 2021-08-18, DOI: 10.1109/tpel.2021.3105643
Huan Zhang, Shuo Wang

This article develops magnetic dipole moment models based on Maxwell's equations for inductor's near magnetic field evaluation and reduction in power electronics systems. In the developed model, the near magnetic field source of an inductor is composed of the magnetic dipole moments from the winding and the air gaps. The superposition of the magnetic dipole moments determines the near magnetic field. The developed model can be easily applied to inductors with different winding and air gap configurations, such as those with lumped or distributed air gaps, for near magnetic field assessment and reduction. Simulations and experiments are conducted to validate the developed theory.