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Problem in Electromagnetic force calculation
Posted 27 mars 2012, 06:03 UTC−4 Low-Frequency Electromagnetics, Parameters, Variables, & Functions Version 4.2a 0 Replies
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Geometry: conductor, concentrator and small iron piece
Phisics: AC/DC module, Global ODEs and DAEs
Current source: 6000A rectangular pulse within 0.25ms or 0.25s
The electromagnetic force is about 106N (reasonable!) when I use stationary study, but the problem is if I use 6000A pulse within 0.25ms, the force is super small than I expected, around 7N (too small!) and it is not a rectangular pulse, triangular pulse I would say.
The funny thing is that when I increase the lasting time of the 6000A pulse, the curve of force versus time immediately becomes reasonable, 106N rectangular pulse.
Is there anything wrong with my setting? COMSOL file is attached within, or there is establishing time of electromagnetic force? but according to phisics, the force would rise up immediately when the external source is imposed!
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Hello Zichi Zhang
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