Overview
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Air core coils that have a smaller inductance than a coil with a core are
used in high-frequency filters and oscillators.
The inductance needs to be investigated thoroughly because any change to
the dimensions can affect the inductance.
This example presents the use of a magnetic field analysis to compare the
analyzed inductance of an air core coil with the inductance that is theorized. |
Magnetic Flux Density Distribution/Inductance
The magnetic flux density distribution in the air region around the coil
is indicated in Fig. 1 and the inductance of the coil is indicated in Table
1.
The inductance from the analysis and the inductance that is theorized are
compared.
The density of the coil's flux linkage is higher in the center of the coil,
as indicated in Fig. 1. The difference between the inductance obtained
from the flux linkage and the inductance that is theorized is 0.28%. This
proves the inductance obtained using an analysis is virtually accurate. |
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