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目标北大

木虫 (正式写手)

[求助] 请教高人有关交流阻抗的问题,急!!!

这是我拟合时用的你和电路,以及一些参数的测定,请问一下Rs-R,Rs-T,Rs-P分别是什么?应该如何测定参数?

求高人指点啊!!!这里先谢过了~~~
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电池小兵

铁杆木虫 (著名写手)

【答案】应助回帖

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感谢参与,应助指数 +1
857688363: 金币+4, 感谢应助 2012-07-11 20:04:37
目标北大: 金币+20, ★★★很有帮助, 太谢谢了!! 2012-07-11 20:33:13
Rs-R,Rs-T,Rs-P?
LZ指的是Ws-R,Ws-T,Ws-P吧~
首先,Ws是Warburg扩散阻抗,是Finite Length Warburg。
公式1,扩散阻抗Z = R*tanh([I*T*w]^P) / (I*T*w)^P       
其中含有三个参数R、T、P: Ws-R, Ws-T, Ws-P

This element is also known as a Generalized Finite Warburg element (GFW). It is an extension of another more common element, the Finite-Length Warburg (FLW).

To use the FLW equation, set Ws-P = 0.5 and set its freedom to 'fixed'.

The FLW is the solution of the one-dimensional diffusion equation of a particle, which is completely analogous to wave transmission in a finite-length RC transmission line.

In the diffusion interpretation Ws-T = L^2 / D. (L is the effective diffusion thickness, and D is the effective diffusion coefficient of the particle).

The GFW is similar to this, but for it the square root becomes a continuously varying exponent Ws-P such that 0 < Ws-P < 1.

If the data exhibits only the high frequency (45 degree slope) behavior and not the transition to low frequency behavior, either Wo-R or Wo-T must be set as Fixed(X). Alternately, a CPE can be used in this situation.

This version of the Warburg element is terminates in a finite resistance. At very low frequencies, Z' approaches Ws-R and Z" goes to zero.
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2楼2012-07-11 20:03:24
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