放置在涡流中的涡流笼圈计数出涡流源的转数。
A vortex cage located in the vortex counts the revolutions of the vortex pool.
与常用的电流源为场源的有限元法相比，不需要用电流进行迭代，从而减少非线性涡流场计算的迭代次数。
The current iteration is not necessary and the iterative times of computing nonlinear eddy current fi- eld are large reduced in this paper, compared with the other considering current source.
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