of components. Some of these components are termed as active components because they take part in the transformation of the energy while other components‚ which only dissipate or store energy‚ are called as passive elements. The vacuum tubes‚ rectifier‚ transistors are some of-the common active while the resistances‚ which dissipate the power and energy storing elements such as capacitances and inductances are known as passive elements. The transformers may be regarded as a matching device.
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Power Electronics * The control and conversion of electrical power by power semiconductor devices (wherein these devices operate as switches) * To control and convert electrical power from one form to another * Power range: from a few VA/Watts to several MVA / MW * The primary task of power electronics is to process and control the flow of electric energy by supplying voltages and currents in a form that is optimally suited for user loads. Interdisciplinary Nature of Power
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Confidential – IPR applies 3 © Nokia Siemens Networks Module 2 - Installation Planning / MNa / 2007-05-08 Stack installation Configuration • BTS modules stacked on the floor in an • indoor or outdoor environment Optional modules: FPMA Rectifier/Battery Module – – FPDA DC/DC converter Module – ESEA System Extension Module Installation principles • Module casings must be installed • Only front cabling • Modules fixed to plinth with screws • Maximum 5 x 3 HU modules in an • • earthquake
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British Journal of Science 1 September 2011‚ Vol. 1 (2) © 2011 British Journals ISSN 2047-3745 Development of a GSM Based Household Power Management System Ganiyu R. A.‚ Arulogun O. T.‚ Adetunji A. B. and Okediran O. O. Department of Computer Science and Engineering‚ Ladoke Akintola University of Technology‚ P.M.B 4000‚ Ogbomoso‚ Nigeria. ABSTRACT Household power management system provides a means of controlling home appliances remotely using mobile phone. In this paper‚ we mainly focus on
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ABSTRACT The manual method of synchronization demands a skilled operator and the method is suitable for no load operation or normal frequency condition. under emergency condition such as lowering of frequency or synchronizing of large machines a very fast action is needed‚ which may not be possible for a human operator. Thus there is a need of autosynchroniser in a power station or in an industrial establishment where generator are employed. This paper describes a microprocessor based set
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International Journal on Hands-on Science [ISSN (print): 1646-8937; (online): 1646-8945] Received July 21‚ 2008; Accepted September 3‚ 2008. Volume 1‚ Number 1‚ September 2008. The Hands-on Science Network’ 2008 ____________________________________________________________________________________________________________________ Alternating Current and Direct Current Generator Pedro Portela‚ João Sepúlveda‚ João Sena Esteves Department of Industrial Electronic University of Minho‚ Campus of
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MONITORING AND AUTOMATION OF CULTIVATION AND DATA TRANSFER BY USING ZIGBEE AIM: The main aim of this project is to implement the networked agricultural monitoring and controlling system using Zigbee Technology. PURPOSE: The purpose of the project is to provide the details of soil fertility‚ temperature‚ humidity and to control these parameters. METHODOLOGY: BLOCK DIAGRAM
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Processing Re-write Suggestions Done (Unique Article) The samurai (or bushi) were the soldiers of premodern Japan. They later created up the ruling military category that eventually became the best ranking social caste of the Edo amount (1603-1867). Samurai used a variety of weapons like bows and arrows‚ spears and guns‚ however their main weapon and image was the arm. Samurai were imagined to lead their lives in step with the ethic code of code ("the method of the warrior"). powerfully Confucian
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-1- Office of the Chief General Manager Telecommunications Tamilnadu Circle‚ Chennai 600 002 No.RET/301-10/2012 dated @ Chennai the 18- 04-2013 BHARAT SANCHAR NIGAM LIMITED (A Government of India Enterprise) DIRECT RECRUITMENT FOR TELECOM TECHNICAL ASSISTANTS (TTA) Applications are invited from the eligible Indian citizens for the post of Telecom Technical Assistant (TTA) in the non-executive category in BSNL‚T.N.Circle. Selection of candidates will be through a Competitive Examination to
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[pic] [pic] 4. A periodic function of period [pic] is defined over one period by [pic]. Determine the Fourier series expansion 5. A sinusoidal voltage [pic]is passed through a half-wave rectifier which clips the negative portion of the wave. Expand the resulting periodic function as a Fourier series [pic] 6. For the function defined by the graph OAB‚ find the half-range Fourier sine series. 7. The damped vibrations
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