Fe-Si-Al powder E-Cores compete with capped ferrites

摘要

Magnetic cores for power supply inductors require careful selection because of the important role they play. An inductor core must be able to retain inductance with dc bias and handle any ripple current without excessive core loss. Therefore, inductor cores generally need to have high saturation flux density, low permeability, and low loss. Besides these ideal material characteristics, selecting inductor cores often involves their shape, cost, and size. The following are some commonly used magnetic materials for inductors.