QUESTION:
Do you have examples demonstrating a method for calculating net flux passing through a coil? My objective is to use time varying flux in a harmonic response or transient analysis to calculate induced EMF in a sense coil of an eddy current probe.
ANSWER:
The attached zip file contains a 30 degree sector of a simple air coil modeled 2 ways:
1) SOLID97 MVP (flux calculated with surface integral of B_normal and also with FLUXV.MAC)
2) SOLID117 edge flux formulation (flux calculated with surface integral of B_normal - FLUXV.MAC is not applicable).
In both models, the coil is current fed (BFE,,JS...) and has a uniform current density over its cross section, just as a stranded coil would. In a sensor application, the sense coil current will be negligible so no current excitation should be defined in it. Coil current excitation should instead be defined in the drive coil.
QUESTION: Do you have examples demonstrating a method for calculating net flux passing through a coil? My objective is to use time varying flux in a harmonic response or transient analysis to calculate induced EMF in a sense coil of an eddy current probe. ANSWER: The attached zip file contains a 30 degree sector of a simple air coil modeled 2 ways: 1) SOLID97 MVP (flux calculated with surface integral of B_normal and also with FLUXV.MAC) 2) SOLID117 edge flux formulation (flux calculated with surface integral of B_normal - FLUXV.MAC is not applicable). In both models, the coil is current fed (BFE,,JS...) and has a uniform current density over its cross section, just as a stranded coil would. In a sensor application, the sense coil current will be negligible so no current excitation should be defined in it. Coil current excitation should instead be defined in the drive coil. |
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