Citations with the tag: ELECTRIC generators -- Alternating current

Results 51 - 100

  • Evaluaci�n de la protecci�n del est�tor de generadores sincr�nicos ante fallas a tierra por medio del m�todo de inyecci�n subarm�nica.
    Giraldo, Luis C.; Mora-Fl�rez, Juan J.; Olguin, Gabriel // Ingenier�a y Competitividad; Jun2008, Vol. 10 Issue 1, p21 

    In this paper, we make an evaluation of the complete ground-fault protection of the stator of synchronous generators by use of the subharmonic injection method. Firstly, we describe two approaches for the complete protection of the stator: the third harmonic method and the method of subharmonic...

  • Sinhrona generatora stabilitates paaugstina�ana arierosmes sprieguma regule�anas metodi.
    Gurovs, Nikolay; Petrichenko, Romans // Power & Electrical Engineering; 2010, Issue 26, p73 

    Problem of power supply system's safety and quality of control has taken on special significance due to development and complication of electropower systems. The effective decision of this problem is prevented by deficient controllability with anticrush automatics existing devices in emergency...

  • Problems Related to Excitation Winding Surface Temperature Measurement of a Salient Pole Synchronous Generator in Rotation.
    Hanic, Zlatko; Vrazic, Mario; Stipetic, Stjepan // Journal of Energy & Power Engineering; May2012, Vol. 6 Issue 5, p826 

    This paper addresses some of the problems related to direct surface temperature measurement of a salient pole synchronous generator excitation winding in rotation. Excitation winding temperature is used for determining the dynamic limit in a PQ diagram. The paper also addresses procedures of...

  • Charging systems.
    Wilson, Marilyn // Fleet Owner; Jan2001, Vol. 96 Issue 1, p64 

    Deals with the design changes made in the charging systems and alternators of heavy-duty trucks due to increased power demands. Features of an alternator to be introduced by Robert Bosch company; Basic avenues to making 42 volt systems; Information on an alternator technology being developed by...

  • Keep your alternators out of trouble.
    Baxter, John // Commercial Carrier Journal; Oct2009, Vol. 166 Issue 10, p30 

    The article describes several alternators technology for trucks. Explanation is offered on how to choose alternators that will have the correct output characteristics. Suggestions are offered on alternator maintenance, including assessments of batteries, cables and connections in the charging...

  • Alternator Repairs: Plane Power Tops.
    Baxter, John // Aviation Consumer; Feb2013, Vol. 43 Issue 2, p20 

    The article offers information regarding importance of troubleshooting and discusses several aspects of aircraft alternators including their function, failure and replacement options. It mentions that a careful troubleshooting in case of failure of charging system of an aircraft saves money. It...

  • A Novel Maximum Power Point Tracking Control for Permanent Magnet Direct Drive Wind Energy Conversion Systems.
    Ying Zhu; Ming Cheng; Wei Hua; Wei Wang // Energies (19961073); May2012, Vol. 5 Issue 5, p1398 

    This paper proposes a novel optimal current given (OCG) maximum power point tracking (MPPT) control strategy based on the theory of power feedback and hill climb searching (HCS) for a permanent magnet direct drive wind energy conversion system (WECS). The presented strategy not only has the...

  • The World Market for Electric Motors with Output Exceeding 37.5 w and AC Generators: A 2011 Global Trade Perspective.
    Parker, Philip M. // Global Trade Perspectives; 1/ 4/2010, pN.PAG 

    Several tables and graphs related to the 2011 global trade perspective on the market for electric motors with output exceeding 37.5 watts (w) and alternating current (ac) generators for countries in Africa, Asia, Europe, Latin America, North America and the Caribbean, Oceana, and the Middle East...

  • The World Market for AC Electric Motors with Output Exceeding 37.5 w: A 2011 Global Trade Perspective.
    Parker, Philip M. // Global Trade Perspectives; 1/ 4/2010, pN.PAG 

    Several tables and graphs related to the 2011 global trade perspective on the market for alternating current (ac) electric motors with output exceeding 37.5 watts (w) for countries in Africa, Asia, Europe, Latin America, North America and the Caribbean, Oceana, and the Middle East are presented.

  • The World Market for AC Electric Generators: A 2011 Global Trade Perspective.
    Parker, Philip M. // Global Trade Perspectives; 1/ 4/2010, pN.PAG 

    Several tables and graphs related to the 2011 global trade perspective for alternating current (ac) electric generators market for countries in Africa, Asia, Europe, Latin America, North America and the Caribbean, Oceana, and the Middle East are presented.

  • Improve your Alternator Charging System.
    COTE, JEFF // Pacific Yachting; Feb2013, Vol. 55 Issue 2, p69 

    The article offers suggestions on how to improve a boat's alternator charging system. It suggests ensuring there is minimum loss of energy produced by the alternator. It suggests reducing the wire length between the alternator and the battery using an external regulator. It suggests taking care...

  • al·ter·na·tor.
    COTE, JEFF // American Heritage Student Science Dictionary; 2009, p11 

    A definition of the term "alternator" is presented. Alternator is an electric generator that produces alternating current. The current reverses direction, back and forth, because the generator's coiled wire rotates rapidly within the magnetic field created by its two magnets, causing the charge...

  • Optimization of ultrasonic welding parameters for copper to copper joints using design of experiments.
    Elangovan, Sooriyamoorthy; Prakasan, K.; Jaiganesh, V. // International Journal of Advanced Manufacturing Technology; Nov2010, Vol. 51 Issue 1-4, p163 

    Ultrasonic welding is a solid-state joining process that produces joints by the application of high-frequency vibratory energy in the work pieces held together under pressure without melting. In electronic and automotive applications, copper wires are connected to the equipment...

  • Rougher, tougher alternators.
    Elangovan, Sooriyamoorthy; Prakasan, K.; Jaiganesh, V. // Fleet Owner; Feb2005, Vol. 100 Issue 2, p56 

    This article reports that the firm Delco Remy has introduced several enhanced heavy-duty brushless type alternators for the commercial truck and transit bus market that is says are more durable and reliable. Featuring Delco Remy's new Maximum Cooling Technology design, the alternators have dual...

  • Alternators/starters.
    Elangovan, Sooriyamoorthy; Prakasan, K.; Jaiganesh, V. // Aftermarket Business; Jun2004, Vol. 114 Issue 6, p32 

    Presents the survey results of the 8th Annual U.S. Consumer Attitude Survey Study for the automotive aftermarket category of alternators/starters. Buying habits; Reason for the purchase; Alternative user of the product; Source of the purchase; Influence of advertising on product purchase; Source...

  • How to Care for Your Alternator.
    Faulkner, Jimmy // Fire Chief Expert Blog; 6/11/2012, p1 

    The article discusses the maintenance for an alternator. It notes that load-rated alternators is the life blood of electrical systems on any emergency apparatus. It elaborates on determining the specific alternator needed for a specific job by creating a load chart of electrical devices that...

  • Delco Voltage Regulator.
    Faulkner, Jimmy // Light Plane Maintenance; Feb2013, Vol. 35 Issue 2, p18 

    The article focuses on mechanical voltage regulators made by Delco Remy International Inc., which was used to control aircraft generators. It mentions the significance of the voltage regulator in the simplicity and functionality of mechanical engineering. It notes that maintenance and...

  • Parker’s dynamo near the excitation threshold.
    Sever’yanova, M.; Popova, E.; Sokoloff, D. // Astronomy Reports; Aug2010, Vol. 54 Issue 8, p762 

    method of constructing asymptotic solutions for nonlinear mean-field dynamo equations near the excitation threshold is developed and applied to equations describing the solar dynamo in a Parker model. The form of solution obtained corresponds to the eigensolution for a kinematic dynamo, for the...

  • The vortex effect of Francis turbine in electric power generation.
    TÜRKMENOĞLU, Veli // Turkish Journal of Electrical Engineering & Computer Sciences; 2013, Vol. 21 Issue 1, p26 

    In this study, the vibration effects of a vortex that occurred in high-head Francis turbines and an alternator are examined. The vortex effect, which directly affects the efficiency and the quality of the energy, was tested at the Darca-1 hydroelectric power plant (HPP) located in Ordu Province,...

  • Nonlinear Robust Excitation Control Based on ESO-Backstepping Method.
    Zhihan Zhang // Smart Grid; Jun2013, Vol. 3 Issue 3, p85 

    In this paper, the nonlinear robust excitation control of synchronous generator based on the ESO and backstepping method is proposed. The model uncertainties are compensated by constructed ESO, and the nonlinear parts of the model are retained for using back-stepping design method. Stability...

  • CHAPTER NINE -- ELECTRICAL SYSTEM.
    Zhihan Zhang // Harley-Davidson XL Sportster, 2004-2013; 2013, p296 

    The article offers information on service and test procedures for motorcycle's electrical and ignition system components. It provides step-by-step instructions for the testing and replacement of charging system, lighting equipment, and batteries. It also notes the removal, installation, and...

  • Don't be short with alternator.
    Zhihan Zhang // PS: Preventive Maintenance Monthly; Mar97, Issue 532, p14 

    Gives suggestions on how to handle shorting problems with the 650-amp alternator on M109A6 Paladin. Protection of pressure hoses; Coating of alternator's positive and negative terminals with adhesive sealant.

  • Biggest Accelerator.
    Zhihan Zhang // Time; 8/8/1960, Vol. 76 Issue 6, p69 

    The article offers information regarding the alternating gradient synchroton (AGS) of the Brookhaven National Laboratory in Long Island, New York. It offers details on the construction of the AGS and specifics regarding the AGS particle acceleration. Moreover, it compares the AGS particle...

  • Product News.
    Zhihan Zhang // Coal Age; Jul2004, Vol. 109 Issue 7, p51 

    Presents information on several products used for coal mining introduced in the U.S. as of July 2004. EH5000 rigid frame haul truck from Hitachi; Flame proof alternator from Dry Systems Technology; Conveyor chain from Thiele GmbH.

  • 'Smart lightbox' helps detect diseases.
    Zhihan Zhang // Design News; 6/7/93, Vol. 49 Issue 11, p38 

    Reports on the initiative of Advanced Technology Incubator Inc. in developing a new lightbox which enables doctor to analyze mammograms and other X ray films in the U.S. Consists of liquid crystal blocks; Capability to solve the problem of glare common with electric alternators; Usability of the...

  • Decoupled, Reduced Order Model for Double Output Induction Generator Using Integral Manifolds and Iterative Separation Theory.
    Sedighizadeh, M.; Rezazadeh, A. // Proceedings of World Academy of Science: Engineering & Technolog; Dec2007, Vol. 36, p742 

    In this paper presents a technique for developing the computational efficiency in simulating double output induction generators (DOIG) with two rotor circuits where stator transients are to be included. Iterative decomposition is used to separate the flux-Linkage equations into decoupled fast...

  • CHARGES & STARTS.
    Petersen, Donny // American Iron Magazine; Jun2011, Issue 273, p42 

    The article explores four components of a motorcycle's Evolution charging system. The alternator is positioned inside the primary chaincase and is made up of a rotating rotor and a fixed stator. The regulator/rectifier on a generator charging system transfers DC voltage to the battery at a...

  • EXCITATION SYSTEM MODELS OF GENERATORS OF BALTI AND EESTI POWER PLANTS.
    Attikas, R.; Tammoja, H. // Oil Shale; 2007 Supplement, Vol. 24, p285 

    This paper describes the requirements for the generator's excitation system. Different parts of the excitation system are also presented. Two totally different types of excitation systems are installed in generators of both Eesti and Balti power plants. The one -- fast static excitation system...

  • Performance Analysis of a Synchronous Generator Under Loss of Excitation.
    Mazhar, R. M.; Tashakori, H.; Kar, N. C. // International Review of Electrical Engineering; Mar/Apr2008, Vol. 3 Issue 2, p371 

    Synchronous generators subjected to LOF (Loss of Field or Excitation) may sustain severe damage in the generator resulting from high current and pulsating torques. In this research, a new scheme is proposed by taking the saturation in main flux into account to design a LOF impedance relay. A...

  • An Axial-Flux Permanent Magnet (AFPM) Generator for Defence Applications - Paradigm Shift in Electrical Machine.
    Parlikar, V. V.; Kurulkar, P. M.; Rathod, K. P.; Kumari, Poonam // International Journal on Electrical & Power Engineering; Feb2012, Vol. 3 Issue 1, p33 

    This paper discusses the indigenous development of novel, innovative, compact, lightweight and highly efficient Permanent Magnet based Alternator incorporating Axial Flux technology. The above prototype alternator has been successfully developed and realized by the author team @ R&DE (Engrs),...

  • System frequency regulation investigation in doubly fed induction generator (DFIG).
    XUE YINGCHENG; TAI NENGLING // WSEAS Transactions on Power Systems; Jan2012, Vol. 7 Issue 1, p18 

    The conventional decoupling control in the variable-speed doubly fed wind turbines has little support to the system frequency. The characteristics of doubly fed induction generator (DFIG) wind turbines and conventional plant are compared. The contributions of DFIG to system inertial response and...

  • Field Orientation Control of a Wind Driven DFIG Connected to the Grid.
    MOSSA, MAHMOUD A. // WSEAS Transactions on Power Systems; Oct2012, Vol. 7 Issue 4, p182 

    This paper aims to develop a method of field orientation scheme for controlling both active and reactive powers of a DFIG (double fed induction generator) driven by a wind turbine. The controlled system consists of a wind turbine that drives a DFIG connected to the utility grid through AC-DC-AC...

  • Radical Alternator.
    MOSSA, MAHMOUD A. // DPC: Dredging & Port Construction; Dec2005, p34 

    The article presents information on the ET-305-J alternator from Eco-Tech, which incorporates breakthrough technology that allows it to achieve high output at low rpm. According to the company, it is capable of producing 2.5 times the amperage of similar conventional alternators. ET-305-J, which...

  • Taking Charge.
    Calder, Nigel // Professional Boatbuilder; Apr/May2014, Issue 148, p58 

    The article focuses on battery efficiency and technology in shipboard electrical systems, focusing on emerging technologies and their benefits in improving efficiency of energy systems with much lower energy cost. It discusses topics including lead-acid battery technologies, absorbent glass mat...

  • Yoked waterwheel-windmill powers a remote ranch.
    Lord, Ted // Popular Science; Apr82, Vol. 220 Issue 4, p51 

    The article focuses on the creation of an independent power system through a waterwheel-windmill in San Diego, California. The system composed with three-blade, 16 foot-diameter and its wind machine drives 12 volt-alternators. It is controlled by an electric valve, which is actuated either...

  • COMBINED VIBRATOR-SLOT STRUCTURES IN ELECTRODYNAMIC VOLUMES.
    Lord, Ted // Progress in Electromagnetics Research B; 2012, Vol. 38, p247 

    The article discusses a study which developed the problem of excitation of electromagnetic fields by a material body of finite dimensions in presence of coupling hole between two arbitrary electrodynamic volumes. A transition from the equations to one-dimensional equations for the currents in a...

  • RETROFIT OBSOLETE EXCITATION SYSTEMS.
    Lord, Ted // Power Engineering; Aug2003, Vol. 107 Issue 8, p20 

    Presents information on the Digital Excitation Control Systems developed by Basler Electric. Function of the systems; Features of the systems; Problems encountered with generators.

  • 6th GENERATION MICROPROCESSOR-BASED VOLTAGE REGULATOR.
    Lord, Ted // Power Engineering; Aug2003, Vol. 107 Issue 8, p20 

    Presents information on the microprocessor-based digital excitation systems developed by Basler Electric. Functions of the excitation systems; Introduction of Basler's voltage regulator.

  • Prime but not suspect.
    Hunt, James // European Power News; Jun2006, Vol. 31 Issue 4, p17 

    The article discusses the growing importance of generating sets and its driven electrical machines. Combined heat and power sector has also been growing and this has driven genset development in both engines and generators, the latter almost always ac machines or alternators. This combined with...

  • Numerical modeling of claw-poles alternator.
    BARZ, C.; OPREA, C.; DRAGAN, F. // Carpathian Journal of Electronic & Computer Engineering; 2012, Vol. 5 Issue 1, p9 

    The paper present a program of modeling of a claw-poles alternator with the program Magnet 6.11, which after the input data of machine realize the geometrical model for numerical analyzes. After analysis, the program can be changed automatically and made a new model, that can be analyzed...

  • WHAT'S IN A NAME?
    Becker, James // Fire Chief; Aug2010, Vol. 54 Issue 8, p78 

    The article focuses on the differences between the direct current (DC) and the alternating current (AC) in terms of the amount of the electrical output power in the U.S. It explores the importance of understanding the transition of magnetic field and the invention of the commutator in AC. It...

  • LETTERS.
    Hussey, Jake; Haines, Ed; Douglas, Mayor John; Whiteley, Martin // Pacific Yachting; Dec2013, Vol. 55 Issue 12, p6 

    Several letters to the editor are presented in response to articles in previous issues including "Sailing Solo," "Tech Talk," and "The New Rainbow Warrior Comes Home to B.C." in the October 2013 issue.

  • Power Flow Modelling of a Self-excited Induction Generator.
    Kulworawanichpong, T.; Sangsarawut, P. // World Congress on Engineering 2007 (Volume 1); 2007, p378 

    This paper presents power flow models of a self-excited induction generator. These models are used for steady-state power flow calculation in electric power systems in which a generating plant driven by renewable energy sources, such as wind energy, is connected to partially serve loads.?? This...

  • Steady State Modeling and ANFIS Based Analysis of Self-Excited Induction Generator.
    Enany, Mohamed A. // Wind Engineering; Jun2014, Vol. 38 Issue 3, p349 

    Self-excited induction generator (SEIG) has the ability to generate power at varying speed, which facilitates its application for wind energy conversion in remote and windy areas. Estimation of the generator behavior under actual operating conditions is essential, but the SEIG analysis with...

  • Modelling of a stand-alone doubly-fed induction generator using two separate reference frames.
    Drid, S.; Nait-Said, M.-S.; Makouf, A.; Tadjine, M. // Electromotion; Oct-Dec2009, Vol. 16 Issue 4, p167 

    This paper deals with the doubly-fed induction generator modelling. This machine is widely used in electrical generation at isolated sites. So, a voltage wave with constant magnitude and frequency can be produced even in the case of variable speed The modelling of the doubly-fed generator in the...

  • Producción energética en un modelo para gimnasios colombianos.
    Yenniffer, D.; Benítez, R.; Juan, B.; González, H.; Javier, Rosero G. // Visión Electrónica; jul-dic2013, Vol. 7 Issue 2, p125 

    Distributed generation (DG), connected at low voltage and small size, based on renewable energy is a phenomenon of increasing research, development and penetration. This paper presents a model of joint power generation, from multiple machines as an alternative to be implemented in gyms. The...

  • Validation of battery–alternator model against experimental data—a first step towards developing a future power supply system.
    Boulos, A M; Pacaud, C; Burnham, K J // Proceedings of the Institution of Mechanical Engineers -- Part D; Jan2004, Vol. 218 Issue 1, p59 

    The electric power system of a modern vehicle has to supply enough electrical energy to drive numerous electrical and electronic systems and components. The electric power system of a vehicle consists of two major components: an alternator and a battery. A detailed understanding of the...

  • Troubleshooting electrical alternators.
    Boulos, A M; Pacaud, C; Burnham, K J // Fleet Equipment; May2009, Vol. 35 Issue 5, p9 

    The article offers tips in troubleshooting electrical alternators. It is helpful to test first the batteries before installing the alternator. Wire and battery cables should be inspected to ensure that are tight and free of corrosion. The fan and pulley should also be inspected so that the...

  • Battery Condition and Alternator Tester.
    Gamauf, Mike; Swickard, James E. // Business & Commercial Aviation; Nov2005, Vol. 97 Issue 5, p152 

    This article reports that VDC Electronics Inc. is now offering its BatteryMINDer, BACT model 12104, battery and alternator condition tester as a separate retail product from its line of pulse-mode battery chargers, maintainers and desulphators. The compact BACT attaches to the battery terminals,...

  • High-Output Alternator.
    Clemans, John // MotorBoating; Mar2004, Vol. 193 Issue 3, p126 

    Introduces the Eco-Tech T-305-I alternator for boats from API Marine. Description of the alternator; Contribution of the patented magnet hybrid rotor design to the alternator's strength; Electric output; Costs.

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