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Uprating of Magnetic Components

Posted by Author on Jul 20, 2016 9:49:09 PM

Inductors, ferrite beads, and transformers use ferrite material as the active component and thus can be expected to behave in a similar manner when used over a broader temperature range. As an example, ferrite beads are often referred to as ferrite bead inductors.

An inductor is a coil of wire typically wrapped around a ferrite core. Passing electrical current through the coil creates a magnetic field proportional to the current. When this current is increased or decreased, it creates a change in magnetic flux that in turn generates a voltage that acts to oppose this change in current. Therefore, inductors tend to be designed to dampen current spikes or filter high frequency signals.

Ferrite beads also use ferrite material, but in this case the coil, or conductor, runs through the ferrite material rather than being wrapped around it. As with inductors, the functionality of the ferrite beads is dependent upon the creation of a magnetic field. In the case of ferrite beads, their purpose is to reduce EMI (electromagnetic interference) and RFI (radio-frequency interference).

Transformers use a ferrite material core and several windings of copper wire to modify the output voltage relative to the input voltage.

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Topics: Magnetic Components, Ferrite Beads, Transformers, inductors, Temperature

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