Results 261 to 270 of about 565,160 (298)
Some of the next articles are maybe not open access.
Comprehensive distortion compensation of grid-connected inverter currents
IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society, 2014The paper presents a comprehensive approach to the compensation of phase current distortion of grid-connected power inverters. Four different sources of current distortion are addressed: imperfect grid synchronization caused by the distortion in the grid voltages, voltage fluctuations in the dc link, time delays in the estimation of grid voltages, and ...
Artur Cichowski +3 more
openaire +1 more source
A Low Distortion, Current Feedback, Programmable Gain Amplifier
2005 IEEE International Symposium on Circuits and Systems, 2005A programmable gain amplifier (PGA) is designed in a 0.18 /spl mu/m CMOS process, which makes use of current feedback building blocks. The voltage gain of the PGA can be changed from 0 dB to +60 dB with 2 dB steps and has a -3 dB bandwidth of 20 MHz. The PGA exhibits better than -60 dB spurious free dynamic range (SFDR) over the entire gain range at a ...
Hüseyin Dinc +2 more
openaire +1 more source
Gradient Distortion Correction for Low Frequency Current Density Imaging
2006 International Conference of the IEEE Engineering in Medicine and Biology Society, 2006Current density imaging (CDI) is a technique that uses magnetic resonance imaging (MRI) to measure the distribution of externally applied electric current inside tissues. However, GDI processing is rendered inaccurate by the distortion caused by the nonlinearity of MRI gradient fields. The distortion interferes with the proper registration and the curl
Charles X. B. Yan +2 more
openaire +2 more sources
A Novel Approach to Current Transformer Characterization in the Presence of Harmonic Distortion
IEEE Transactions on Instrumentation and Measurement, 2009The current transformer (CT) performance under distorted waveform conditions is usually characterized by means of the frequency-response test. In this paper, a new way to characterize CTs, closer to real operation conditions, is proposed. The harmonic phase-angle and ratio errors are measured using a nonsinusoidal current composed of fundamental and ...
CATALIOTTI, Antonio +3 more
openaire +4 more sources
Improving the Accuracy of Current Transformers through Harmonic Distortion Compensation
2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 2019It is common knowledge that conventional current transformers suffer from nonlinear effects due to the magnetization characteristics of their cores. Core saturation may occur because of large overcurrents or unidirectional transient components; however, weak nonlinear effects exist even during normal operation. The typical spectrum of current waveforms
Laurano C., Toscani S., Zanoni M.
openaire +2 more sources
Current distortions compensation method for frequency converters
2012 IEEE 18th International Symposium for Design and Technology in Electronic Packaging (SIITME), 2012This paper present a study of the effects of frequency converters to the power grid and a possible solution for current distortions compensation. Experimental measurements made, at different points of the grid, with the device Fluke 434 to a converter which supplies a 110 kW asynchronous motor, reveal the distortions of current.
I. Orha, S. Oniga
openaire +1 more source
Compensation of Voltage and Current Distortions in Multi Microgrid
2018 53rd International Universities Power Engineering Conference (UPEC), 2018Multi-Microgrid (MMG) is a combination of two or more microgrids (MGs), based on renewable energy sources, integrated at a common point of coupling. However, due to the fluctuating resources and also with different variable loads, it is difficult to maintain a balance between sources and loads, which consequently leads to power quality problems such as
M T L Gayatri, Alivelu M Parimi
openaire +1 more source
Sources of Current and Voltage Distortion
Abstract The development in electronics and power electronics results that traditional loads, such as, for example, incandescent bulb-based lighting systems, meaning the linear ones, which do not cause harmonic distortion are superseded by current harmonics-generating loads.openaire +1 more source
Distortion in a semiconductor laser overmodulated by a sinusoidal current
IEEE MTT/ED/AP/LEO Societies Joint Chapter United Kingdom and Republic of Ireland Section. 1997 Workshop on High Performance Electron Devices for Microwave and Optoelectronic Applications. EDMO (Cat. No.97TH8305), 2002When a semiconductor laser is overmodulated by a sinusoidal current, distortion occurs in the optical signal. Using a static limiter as a first model for the laser only permits a rough analysis of this effect. In order to describe the additional distortion arising when the optical intensity rises above threshold, an improved dynamic model is proposed ...
openaire +1 more source
Contact current distortion due to the tunnel effect
Electrical Contacts - 1999. Proceedings of the Forty-Fifth IEEE Holm Conference on Electrical Contacts (Cat. No.99CB36343), 1999The third harmonic distortion ratio of the tunnel current between two electrodes separated by a thin insulating film, is evaluated by analyzing the formula derived by Simmons (J. Appl. Phys. vol. 34, no. 6, pp. 1793-803, 1963) into the Fourier series in this paper. The results show that the theoretical third harmonic distortion ratio is a function of s/
openaire +1 more source