Results 51 to 60 of about 49,795 (169)

Comparative Study of Control Strategies for Stabilization and Performance Improvement of DC Microgrids with a CPL Connected

Energies, 2020
The DC microgrid system is composed by converters that operate like feeders and loads. Among these loads, we highlight the constant power loads (CPLs) that may cause instability in the microgrid, observed in the form of undesired oscillations due to its ...
Isaías V. de Bessa, Renan L. P. de Medeiros, Iury Bessa, Florindo A. C. Ayres Junior, Alessandra R. de Menezes, Gustavo M. Torres, João Edgar Chaves Filho   +6 more
doaj   +1 more source

Evaluation of the Input Impedance and Impedance Quality Factor of a Dipole in Spatial and Spectral Domains [PDF]

Radioengineering, 2017
In classic antenna analysis, there exist several methods of calculating input impedance when the source distribution of an antenna is known. The well-known induced EMF method, based on spatially distributed currents, is typically applied for this purpose
M. Cerveny, P. Hazdra
doaj  

Modeling and Characteristic Analysis of Mistuned Series–Series-Compensated Wireless Charging System for EVs

Energies
Cumulative mistuning effects in electric vehicle wireless charging systems, arising from component tolerances, coil misalignments, and aging-induced drifts, can significantly degrade system performance.
Weihan Li, Yunhan Han, Chenxu Li
doaj   +1 more source

Analysis of a Half-Wave Dipole in Free and Half-Space Revisited: Analytical and Numerical Modeling Versus Measurements

IEEE Access
This paper revisits the determination of the current distribution and input impedance of a half-wave dipole in free space and half-space by employing analytical and numerical methods based on image theory and the Fresnel reflection coefficient.
Josip Salinovic, Dragan Poljak, Zoran Blazevic, Maja Skiljo   +3 more
doaj   +1 more source

On the Input Impedance of the Thermionic Amplifier [PDF]

Physical Review, 1920
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openaire   +1 more source

Impedance Modeling for Line-Frequency Rectified Constant-Power Loads

IEEE Access
Constant-power loads (CPLs) represent a growing presence on utility grids and microgrids. These power electronic loads are frequently configured as rectified loads operating from an ac input to produce a controlled dc output at a constant power level ...
Eric A. Ponce, Steven B. Leeb
doaj   +1 more source

Method of the coordination of the antenna on two it is considerable the spaced apart frequencies

Физика волновых процессов и радиотехнические системы, 2014
In article the method of the coordination of the antenna on two considerably spaced apart frequencies is considered. Edge conditions of usage of the given method are defined and examples of calculation of lengths of the matching transformer and idling ...
V.A. Neganov, S.B. Filippov, U.E. Shirmanov, A.S. Maltsev   +3 more
doaj  

Influence of the Electrical Test Setup on the Voltage Gain Measurement of an Unloaded Rosen-Type Piezoelectric Transformer Vibrating in the First Three Modes

Measurement Science Review
In recent years, Piezoelectric Transformers (PTs) have become a great success due to their excellent properties, especially in applications requiring high voltage.
Boukazouha Faiza, Barkat Hamza, Rouabha Abdesselam, Herbadji Abderahim, Rguiti Mohamed   +4 more
doaj   +1 more source

Rectifier array with wide input power and frequency ranges using harmonic controllable impedance compression network

Alexandria Engineering Journal
This paper presents a rectifier array with a harmonic-controllable impedance compression network (HCICN) designed to achieve a high power conversion efficiency (PCE) across wide input power and frequency ranges.
Hyunjae Jeon, Seongick Jo, Juntaek Oh
doaj   +1 more source