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Constant phase element
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Constant phase element : ウィキペディア英語版
Constant phase element
A constant phase element is an equivalent electrical circuit component that models the behaviour of a double layer, that is an imperfect capacitor.
The electrical impedance can be calculated:
:Z_=\frace^ni}
where the CPE admittance is :Y_=Q_0(\omega i)^n and Q0 and n (0Q0 = 1/|Z| at ω = 1 rad/s
The constant phase is always −(90
*n)°, also with n from 0 to 1. The case n = 1 describes an ideal capacitor while the case n = 0 describes a pure resistor.
A constant phase element also appears currently in modeling the behaviour of the imperfect dielectrics. The generalization in the fields of imperfect electrical resistances, capacitances and inductances leads to the general "Phasance" concept :
http://fr.scribd.com/doc/71923015/The-Phasance-Concept
Constant phase elements are also used in equivalent circuit modelling and data fitting of electrochemical impedance spectroscopy data.



抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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