Impedance admittance

For the calculations, the capacitive (reactive) impedances = l/coC and Xp = 1/coCp are often used instead of capacitances and C. The impedance (admittance) of an ac circuit can be stated in terms of a complex number where the... 

The LF measurements (a) are provided by means of impedance/admittance analyzers or automatic bridges. Another possibility is to use a frequency response analyzer. In lumped-impedance measurements for a capacitor, filled with a sample, the complex dielectric permittivity is defined as [3]... 

Four state variables may be defined, for example, for the rotating disk described in Qiapter 11. These may include the rotation speed, the temperature, the current, and the potential. At a fixed temperature, three variables remain from which a transfer function may be calculated. As shown in Table 7.1, the generalized transfer functions include impedance, admittance (see Chapter 16), and two types of electrohydrodynamic impedance (see Chapter 15). 

Table 16.1 Summary of complex impedance, admittance, and capacitance characteristics for simple blocking and reactive circuits.

B. Boukamp, "A Package for Impedance/Admittance Data Analysis," Solid State Ionics, Diffusion Reactions, 18-19 (1986) 136-140. 

For special purposes other variables such as voltage, active power, impedance, admittance and frequency are used. 

Boukamp, B.A. 1986. A package for impedance/admittance data analysis. Solid State Ionics 18-19 (1) 136. 

ADifferential/integral. Because of the widespread use of alternating current techniques for measuring impedances (admittance and impedance being the generic notions in electrodynamics encompassing these constitutive properties), it is not... 

Alternate usage. Beware of not restricting, even in electrodynamics, the notions of impedance/admittance to the sole domain of alternative current circuits Too often these notions are defined in the frame of periodically varying currents or potentials when in fact they are much more general operators working with any signal shape. 

B. A. Boukamp [1984] A Microcomputer Based System for Frequency Dependent Impedance/Admittance Measurements, Solid State Ionics It, 339-346. 

In the indirect force control schema, the mechanical impedance/admittance of a manipulator is set with the following relationship between effort and motion about a nominal end-effector trajectory Xq ... 

In addition to an examination of the frequency response of series and parallel components of the circuit impedance/admittance, another approach may be particularly valuable. This analysis method involves plotting the real versus imaginary parts of some such complex quantity as admittance or impedance as parametric functions of frequency. Such Argand or "circle diagrams" have been used for many years in electrical engineering when complex dielectric constant is the quantity considered, they are known as Cole-Cole plots. ... 

Blasco J., Garcia J. Structural, magnetic and electrical-properties of NdNi Fe 03 and NdNii ,Co03 systems. J. Phys. Chem. Solids 1994 55 843-852 Boukamp B.A. A nonlinear least-squares fit procedure for analysis of immittance data of electrochemical system. Solid State Ionics 1986 20 31-44 Boukamp B.A. A package for impedance admittance data-analysis. Solid State Ionics 1986 18 136-140... 

Theory of Distributed-Parameter Circuits and Impedance/Admittance Formulas... 

As is well known, all alternating current (AC) power systems are basically three-phase circuits. This fact makes voltage, current, and impedance a 3-D matrix form. A symmetrical component transformation (i.e., Fortescue and Clarke transformations) is well known to deal with three-phase voltages and currents. However, the transformation cannot diagonalize an n X n impedance/admittance matrix. In general, modal theory is necessary to deal with an untransposed transmission line. In this chapter, modal theory is explained. By adopting modal... 

Line impedance, admittance, and characteristic impedance matrices involve nonzero, off-diagonal elements or mutual coupling, although the propagation constant matrix is diagonal. If one needs to diagonalize these matrices, modal transformation is required. 

In a simulation of an induced voltage to an overhead control cable from a counterpoise, the control cable and the counterpoise are represented as a distributed-parameter line in the EMTP [35, 36-37]. The parameters of the line models are evaluated by the EMTP Cable Parameters (CP) [37]. First, the model system is evaluated as an overhead line system by the CP with a negative sign of the depth of the counterpoise. Initially, the input data, the CP gives the self-impedance/admittance of the overhead cable and the mutual impedance to the counterpoise. Then, the self-impedance/-admittance of the counterpoise is calculated as an underground cable. Finally, the self-impedance/admittance of the counterpoise in the first calculation is replaced by those in the second. 

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