Results 211 to 220 of about 98,806 (261)

Equivalent circuits in stability studies

Electrical Engineering, 1934
Representation of ``receiving-end'' systems by simplified equivalent circuits, for use in steady state stability studies of electric power transmission systems, is discussed in this paper. Various methods of approximate representation are analyzed, compared, and evaluated.
O. G. C. Dahl, A. E. Fitzgerald
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Multiport Equivalent Circuits of Turbogenerators

2018 International Symposium on Electrical Machines (SME), 2018
Two-axis models of turbogenerators are discussed in this paper with the aim to improve modeling of rotor damping effects. According to the recommendation of IEEE Standards high-order models are commonly used for that purpose. In such models the damping elements in a rotor and the rotor body are represented by a set of short circuited windings.
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Equivalent circuit for birdcage resonators

Magnetic Resonance in Medicine, 1993
AbstractWe present an equivalent circuit analysis for both low pass and high pass birdcage resonators loaded with lossy samples. In a generalization of the method of Hoult and Lauterbur (J. Magn. Reson. 34, 425 (1979)), we also derive circuit component values by application of the laws of electrodynamics.
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Equivalent piezoelectric actuator circuits and comparison

2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, 2014
Equivalent piezoelectric actuator circuit is necessary for certain applications. Previous models have limits and are not accurate on modelling the real part of piezo impedance at low frequency range. A simple inverse proportional to frequency model is proposed and experimentally validated.
Xinchang Liu, Yoan Civet, Yves Perriard
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Equivalent Circuits of the Elastic Field

Journal of Applied Mechanics, 1944
Abstract This paper presents equivalent circuits representing the partial differential equations of the theory of elasticity for bodies of arbitrary shapes. Transient, steady-state, or sinusoidally oscillating elastic-field phenomena may now be studied, within any desired degree of accuracy, either by a “network analyzer,” or by ...
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Nonlinear equivalent circuits for membranes

Journal of Mathematical Biology, 1984
The problem of obtaining Helmholtz equivalents for nonlinear resistive one-ports is considered. Two fundamentally different classes of equivalent are described, one local and the other global. For each, necessary and sufficient conditions are derived for the existence and uniqueness of either the Thévenin equivalent or the Norton equivalent or both ...
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The Thermal Equivalent Circuit of a Transistor

IBM Journal of Research and Development, 1959
An exact electrical analogue is given for the thermal system between the collector junction and the constant-temperature environment of a transistor. For this circuit analogue, the voltage response to an applied current is equivalent to the temperature response of the collector junction to an applied-power dissipation. The objective of this paper is (1)
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Equivalent Modulator Circuits

Bell System Technical Journal, 1939
Equivalent modulator circuits are developed in the form of linear resistance networks. They are equivalent in the sense that the current magnitude in any mesh of the network is equal to the current amplitude of a corresponding frequency component in the modulator.
E. Peterson, L. W. Hussey
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Diagnosis and Fault Equivalence in Combinational Circuits

IEEE Transactions on Computers, 1974
Two procedures are presented: one for diagnosis of single-gate failures and the other for deriving equivalence classes of single faults. Both procedures require use of a diagnostic table which lists gate sensitivities and primary output values for all input patterns in a set of tests which contains at most U tests, where U is an upper bound derived in ...
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Equivalent Circuit of the Guitar

The Journal of the Acoustical Society of America, 1966
Experiments performed on a guitarlike enclosure indicate that the equivalent circuit of this instrument is that of a bass-reflex enclosure augmented by a series-resonant element (the back) in parallel with the air volume and the port. The soundboard and back plates of the enclosure are removable and replaceable with rigid panels.
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