Title:Изследване на програмируем токоизточник за електроекстракция на метали
Author:Захариев, Светлозар; Zahariev, Svetlozar; Димитров, Димитър; Dimitrov, DimitarDate:2009Abstract:The process of metal extraction of solution with low and middle concentration is of great interest. It is worked out with programming current sources. A programming current source for impulse current with computer process control is represented. Block-structural scheme and algorithm of the developed and investigated source is shown. Well ...Library:
TECHNICAL UNIVERSITY - SOFIA
Title:Енергийна ефективност и светлинни технологии
Author:Василев, Христо Николов; Vasilev, Hristo NikolovDate:2009Abstract:The modern tendencies in a lighting technology and lighting energy efficiency are discussed in the paper. A review of the problems in that area is made. The global measures taken for improvement of the lighting efficiency and their influence on the methods and equipment used in lighting installations are pointed. The impact of those new ...Library:
TECHNICAL UNIVERSITY - SOFIA
Title:Ограничаване на блуждаещите токове при постояннотоков релсов електрически транспорт
Author:Петкова, Полина; Petkova, PolinaDate:2009Abstract:DC electrical grid system for railway transport feeding in Bulgaria uses track rails as a return path (feeder) to the substation. When this type of feeding is used the underground utility structures and the transportation equipment are exposed to active corrosion because of the stray currents going from the rails to the earth. Overview of ...Library:
