作者pigboss (Pwned)
看板Electronics
标题[问题] 如何求屏蔽板上的感应电流(涡流)
时间Mon Nov 10 23:04:55 2008
救命，i(t)产生磁通量Φ，
屏蔽板上为了产生抵抗磁通会感应出电流ic (即涡流)
请问ic会怎麽流
(a)
http://img145.imageshack.us/img145/5301/inductedcurrenttx1.png
(b)
http://img379.imageshack.us/img379/3975/eddycurrentfv9.png
and then
请问要怎麽求感应电流ic咧
我找很久
只在这篇
Principles of Power-Frequency Magnetic Field Shielding
with Flat Sheets in a Source of Long Conductors
http://ieeexplore.ieee.org/iel1/15/11258/00536075.pdf
有提到
J(x,y)=-j2πfσΑ(x,y)
不知道此式怎麽来的
有高手能救救我吗
Thanks in advance!
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