Browsing Konferencijų medžiaga / Conference Materials by Source "22nd International Conference “Electromagnetic Disturbances EMD’2012”"
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Analysis of errors caused by input channels amplitude discrepancies in time domain EMI measuring system
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)In this document properties of signal spectrum measured by time domain EMI multi resolution device are discussed with focus on elements of system that influence its dynamic range. Errors being analyzed are introduced by ... -
Analysis of quality from customer’s and renewable sources point of view
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)There are summarized some parameters of electric energy in this article. Their exceeding leads to complaint on quality of supplied electric energy. Further are stated some of electro-technical solutions of wind turbines ... -
The analysis of the influence of adjacent radio stations positions on total electromagnetic field intensity observed near the projected BS
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)Development of new cellular networks and introduction of new base stations should conform to regulatory documents, regulating the amount of total electromagnetic field intensity. The estimation of total electromagnetic ... -
Automated synthesis method for inhomogeneous delay systems using artificial neural networks
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)All new microwave devices, including delay systems, are designed by using computer-aided design systems which are managed by specialized software packages. Automated simulation of microwave devices using analytical and ... -
Calculation of characteristics of meander slow-wave system with additional shields
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)In this paper a study of meander slow-wave system with additional shields is performed. Aim of a study is to determine an impact of different topologies of meander edges on dispersion properties of a system. Three ... -
Complaints about power quality and reliability of electricity supply from renewable sources
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)The significant increase in energy production from renewable sources leads to the need of exploring new ways of energy systems. Evaluation of the interruption of renewable energy sources becomes very important to assess ... -
Computer aided investigation of magnetic fields induced by CFL electronic ballasts
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)The investigation results of magnetic fields induced by compact fluorescent lamp electronic ballasts are presented. For the investigation the high definition audio system of portable personal computer and spoafctkwaagree ... -
Creation of system of fields in the primary transducer of NMR-flowmeter
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)The article is devoted to the problems of constructing label NMR consumption indicators of the temporary phylum. The article considers the major theoretical and practical issues which were the basis for constructing the ... -
Current situation in the frequency range from 2 to 150 kHz with regard to electromagnetic compatibility
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)The frequency range from 2 to 150 kHz represents a relative gap in the sphere of electromagnetic compatibility as far as the standardization related to compatibility levels, emission limits and immunity levels is concerned. ... -
Distributed impedance as terminating load at GTEM cell
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)This paper deals with possible improvements of GTEM cell parameters to obtain such parameters of the electromagnetic (EM) field that allow the use of GTEM cell for metrological purposes, mainly for calibration of sensors ... -
Disturbances in the controlled variable speed drive
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)Induction machines (IM) are generally used as motors for many industrial applications due to its simple construction and reliable operation. Proposed motor model is developed in a synchronous rotating reference frame. Fixed ... -
Earthing effective length for low and high amplitudes of lightning impulse currents
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)Earthings of the electrical power systems can achieve wide sizes. Due to equipotential bondings and a presence of main equipotential bar the earthing system can be connected even to a power transformer neutral point. ... -
Electric system and electronic device common surge impedance for surge excitation
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)Impedance for lightning conditions is different in respect to static one. Fast rising surges forces impedance rise. This paper will present a surge impedance measurement results for residential devices. Measurements were ... -
Electrical methods of apical constriction location
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)Exact measurement of distance to the apical constriction during root filling of a damaged tooth is important for endodentists. Radiologic method employing X-rays is exact and visual. But it is slow process and exposes the ... -
Evaluation of meteorological radar antenna radiation
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)The object of this paper is evaluation of antenna electromagnetic radiation results of a new meteorological radar, which planned to be installed near to Vilnius. The results must be compared with permitted level according ... -
Experimental investigation of electrical apical constriction finder
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)Results of experimental investigation of electric apical constriction locator with two excitation frequencies, which has been developed in Lithuania are presented. The lower frequency signal is used for compensation of the ... -
Experimental study of spectrum sensing algorithm with low cost SDR
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)Development of the efficient algorithm for the spectrum sensor for cognitive radio is slowed by the lack of experiments within a real environment. In this paper we suggest to use a low cost software defined radio (SDR) ... -
Improving the shielding effectiveness of a metallic enclosure with aperture under electromagnetic pulse
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)An efficient and practical method to enhance the shielding effectiveness of a rectangular enclosure with aperture against electromagnetic pulse (EMP) is presented. In this paper an extra aperture as a matched load instead ... -
Influence of cable routing on the flashover distance between lightning protection system and electrical equipment on a building roof
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)Lightning protection in a building requires appropriate separation distances to be kept between electrical equipment/installation and LPS (Lightning Protection System). The paper presents results of numerical calculations ... -
Intermediate frequency noise in and from electrical power network in modern working places
(22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)This study presents the measurement results of high frequency noise in mains electrical system in workplaces. Measurements were taken both directly connected to the mains power network and from inside the facilities by ...