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A skin effect in Busbar (Frequency Domain)
Posted Sep 1, 2019, 5:46 AM EDT Electrical, AC/DC & Electromagnetics 0 Replies
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Hi, I am working on an electromagnetic field in current-carrying busbar and I have a problem with the skin effect. Due to my geometry 10x150 mm2, the skin effect is very visible, as it should be. When I calculate the current density in the cross-section of busbar( 1500mm^2) by using the "Surface Integration" I obtain higher current about 4kA than I applied. The supplied current(RMS) - "coil", in Magnetic Field(MF) is 102,53kA, and calculated using mf.normJ is 106,35kA. How can I describe this effect? Where did I make a mistake?
The problem disappears when I simulate the busbar of 10x10 mm2. So definitely is a problem of skin effect, but why COMSOL gives me more current? Every suggestion and help is welcome.
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