SEARCH ENGINEERING RESEARCH PAPERS

alternator research papers



An IPM machine with segmented magnet rotor for integrated starter alternator
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ABSTRACT Ever decreasing fuel source and concern about air pollution by emission of carbon exhaust of car engine make it necessary to develop future automobiles more energy efficient which is forcing the industry to convert many mechanically driven parts to

A Free-Piston Stirling Engine-Alternator for Solar Electric Power
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Abstract This paper describes the potential adaptation of an existing 2.5 kW, biomass red free-piston Stirling engine with integral linear alternator to solar thermal applications in an opposed 5 kW, conguration. The design of the current biomass engine is based upon the

Wind turbine generation system implemented with a car alternator for use in isolated locations
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Abstract. This work presents a wind driven AC electrical generator system for use in isolated locations. The mechanical energy is provided by a vertical axis wind turbine, connected to a standard car alternator. This arrangement requires no mechanical speed control and, as

Extracting more power from the lundell car alternator
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Abstract Due to the increasing power demands in automotive applications, the conventional power generator (Lundell alternator) is rapidly reaching its limits. This paper examines an approach that allows substantial increases in the output power and efficiency of

Development and Performance of a 3 kW (e) Air Charged Free-Piston Stirling Engine with Linear Alternator
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1 Background This project began in the last quarter of 1984. The major requirements being: i) 3 kW (e) continuous power under environmental temperatures ranging from-46 C to 52 C. Under these conditions the frequency should be maintained to within 0.25%. ii) That the

A 3-D Magnetic Analysis of Stirling Convertor Linear Alternator Under Load
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ABSTRACT The NASA Glenn Research Center (GRC), the Department of Energy (DOE), and the Stirling Technology Company (STC) are developing Stirling convertors for Stirling Radioisotope Power Systems (SRPS) to provide electrical power for future NASA deep

Overview of NASA magnet and linear alternator research efforts
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Abstract. The Department of Energy, Lockheed Martin, Stirling Technology Company, and NASA Glenn Research Center are developing a high-efficiency, 110 watt Stirling Radioisotope Generator (SRG110) for NASA Space Science missions. NASA Glenn is

The diagnostic of technical condition of turbine engine's bearing by means of method ofalternator frequency modulation
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THE DIAGNOSTIC OF TECHNICAL CONDITION OF TURBINE ENGINE'S BEARING BY MEANS OF METHOD OF ALTERNATOR FREQUENCY MODULATION

Development of a 1200-Hertz Alternator and Controls for Space Power Systems
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ABSTRACT For a 1200-hertz Brayton energy conversion system having a useful load rating of 10 kWe, an alternator and the associated voltage and frequency controls were designed

Homogeneous Charge Compression Ignition Free Piston Linear Alternator
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Abstract An experimental and theoretical investigation of a homogeneous charge compression ignition(HCCI) free piston powered linear alternator has been conducted to determine if improvements can be made in the thermal and conversion efficiencies of

Dynamic simulation of a free-piston linear alternator in modelica
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Abstract This paper presents the modeling and simulation of a novel development of a free- piston engine in Modelica. The investigated concept is a combination of a combustion process and a linear alternator designed to provide clean, efficient energy in a compact

Controllability of free-piston Stirling engine/linear alternator driving a dynamic load
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Abstract This paper presents the dynamic behavior of a Free-Piston Stirling Engine/linear alternator (FPSEfl. A) driving a single-phase fractional horse-power induction motor. The controllability and dynamic stability of the system are discussed by means of sensitivity

Design and analysis of AN automotive Alternator
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The article deals with design of the heavy-duty claw-pole automotive alternator. This type of alternator should operate under unfriendly condition, eg in agricultural applications. Described development is supported by Ministry of Industry and Trade in frame of the

Calculation of the mechanical and acoustic behaviour of a claw-pole alternator in double and single star connection
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Abstract:This paper compares the acoustic behaviour of a claw pole alternator with different connection types of the stator coils. The alternator has a pole pair number of p= 6 and 72 stator slots (number of slots per phase winding q= 2). While the geometry of the

Preliminary Performance of a 1200 Hertz Alternator, Voltage Regulator, and Electronic Speed Control Operating in a Brayton Cycle Power System
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ABSTRACT A single shaft turbine-compressor-alternator with electronic voltage and speed control was tested at approximately design turbine inlet temperature and speed with constant power output levels of 4.30, 5.02, and 6.08 kW. The purpose of this test was to

Short-Term Aging of NeFeB Magnets for Stirling Linear Alternator Applications
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Summary NeFeB type magnets have been proposed for use in free piston Stirling engine driven, linear alternators to generate electric power during long duration space missions. These type of materials provide the highest energy product commercial magnets, thus

Electromagnetic Performance Limits of a 1200-Hertz Lundell Alternator for a Brayton-Cycle Power System
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ABSTRACT Overload tests were performed on a 10.7-kilowatt 1200-hertz Lundell alternator in order to determine its electromagnetic limitation on output power. The maximum output powers were 26 kilowatts at 0.85 power factor and 44 kilowatts at 1.0 power factor.

Experimental Performance of a 10 kW, 1200 Hertz Brayton Cycle Alternator and Controls for Space Power
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Abstract The performance of the electrical subsystem for a 10-kilowatt 1200-hertz Brayton- cycle power system was experimentally deter-' mined. The electrical subsystem under test included the alternator and prototype electronic controls consisting of the voltage regulator

Modeling and Control of a 7-phase Claw-pole Starter-alternator for a Micro-hybrid Automotive Application
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Abstract-This paper deals with the modeling and the control of a new high power 12V starter- alternator system. The drive is composed of a 7-phase synchronous claw-pole machine with separate excitation, supplied with a 7-leg Voltage Source Inverter (VSI) designed for low

Fault Diagnosis in Automotive Alternator System Utilizing Adaptive Threshold Method
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ABSTRACT In this paper, an observer-based adaptive threshold is developed as part of a fault diagnosis scheme to detect and isolate commonly occurring faults in a vehicle alternator system. Since the mathematical model of the alternator subsystem is quite

Investigation of iron losses in a high flux interior PM automotive alternator
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Abstract This paper examines the iron loss characteristics of a high-flux interior PM machine. This was designed as a concept demonstrator for a 6kW automotive alternator and has a wide fieldweakening range. Initial experimental tests showed a high iron loss during high-

Free-Piston Stirling Engine/Linear Alternator 1000-Hour Endurance Test
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The Free-Piston Stirling Engine (FPSE) has been under development at Mechanical Technology Incorporated (MTI) since 1976. As the design has matured and performance improved during the development/testing process, it has become important to demonstrate Contents The Fourier Transform method is used to compute transient magnetic fields in a 1.3 GVA superconducting alternator. The necessary frequency-response functions are measured in a scale-model and are used to show the spatial variation of the transient field

Operational results from a high power alternator test bed
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Abstract The Alternator Test Unit (ATU) in the Lunar Power System Facility (LPSF) located at the NASA Glenn Research Center (GRC) in Cleveland, Ohio was used to simulate the operating conditions and evaluate the performance of the ATU and its interaction with

Reliability of Radioisotope Stirling Convertor Linear Alternator
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Abstract. Onboard radioisotope power systems being developed and planned for NASA's deep-space missions would require reliable design lifetimes of up to 14 yr. Critical components and materials of Stirling convertors have been undergoing extensive testing

Results of Endurance Tests of a SNAP 8 Turbine-alternator
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SUMMARY The SNAP-8 turbine-alternator was tested with mercury vapor in a system endurance run. Considerable long-term endurance and performance information was obtained. The turbine-alternator accumulated 1445 hours (1100 hr continuous) and was

Application of wavelet transforms for alternator stator fault location and protection
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ABSTRACT This paper presents the novel approach in protection and detection techniques of Alternator stator winding from the earth faults which are simulated between 2% to 10% distance point from the alternator neutral, since the impedence at that distance is very high

Thermal problems in the rotor of a superconducting alternator
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Summary Referring to the superconducting turbogenerators, the paper gives some solutions for optimizing the power required for the refrigeration of the thermal distance pieces, of the current leads of the superconducting winding and of the rotor screening system. The value

Simulation of an Integrated Starter-Alternator System for new-generation autovehicles
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Abstract. This paper first discusses the requirements and selection of the electric machine and electronic power converter for an automotive integrated starter/alternator (ISA). Then, the design of a 6 kW interior permanent-magnet synchronous machine (IPMSM) for a

Numerical modeling of claw-poles alternator
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Abstract: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

Sample rate selection for oscilloscopic diagnostics of alternator and starter
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ABSTRACT: The selection of the sample rate is essential for oscilloscopic measurements of dynamic quantities. Too low sample rate may distort the measured signal's waveform and in consequence even result in mistakes. Too high sample rate may increase the information

A Fuzzy-Logic-Based AVR for a Stand-Alone Alternator Feeding a Heater Load
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Author Affiliation: Department of Electrical and Computer Engineering, Kansas State University, Manhattan, KS. Abstract: Feeding electric loads independent of power utilities is an important task that is done by using a stand-alone synchronous generator (alternator).

A Starter/Alternator System with Permanent Magnet Machine and AC Power Supply Based on a Space Vector Controlled Three-and Single-Phase Converter for
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Abstract An electric power supply system for vehicles is described consisting of a permanent magnet machine as starter/alternator, a DC bus bar and converters for the DC-and AC- supply. Due to the wide speed range the permanent magnet machine in general has to be

Lateral rotordynamic analysis of a large alternator/flywheel/motor train
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ABSTRACT A large alternator/flywheel/motor train is employed as part of the power system for the ALCATOR C-MOD experiment at the MIT Plasma Fusion Center. The alternator is used to provide peak pulse power of 100 MW to the magnets employed in the fusion

ENVIRONMENTAL CARS: CONTROL OF AUTOMOTIVE SUPPLY SYSTEM BASED ON CONVENTIONAL ALTERNATOR PART 1: MODELING AND ANALYSIS
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ABSTRACT This paper is aimed at the study of conventional 14 V automotive electrical supply systems as a basis for the development of a novel 42 V supply system capable to provide maximum power to both the vehicle's battery and the on-board consumers. By

Prime Antiflexible Derivation Alternator Rings
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Abstract: This study proves that a prime antiflexible derivation alternator R is either associative or the nucleus is equal to the center of R. Also, a prime antiflexible derivation alternator ring R with idempotent e* 1 and characteristic 2, 3 is alternative. Key words:

Alternator protection, part 1: Understanding code requirements
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It is nearly universal practice to protect electrical distribution systems from the effects of electrical overloads and short circuits, since these conditions can cause major damage, loss of revenue, and may even cause loss of life. The use of overcurrent and short circuit

Development and implementation of Visteon integrated starter alternator system with ultra capacitors
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Abstract: This paper presents the design, development and implementation of the Visteon Integrated Starter-Alternator (VISA) system. The unique aspect of the vehicle's power system is that it utilizes the 300 volt ultracapacitors energy storage system, which is smaller and

Correlation of Windage-loss Data for a Lundell Alternator
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16. Abstract Viscous torque (windage) of a Lundell-shaped rotor having a major diameter of 20.3 cm (8 in.) rotating within a concentric housing was measured at speeds up to 36 000 rpm. The center cylindrical section of the housing was tested with both a smooth surface

Idle speed control for automotive engines with an integrated starter alternator
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Abstract: This paper describes a model-based control design methodology for engine idle speed control in a mild hybrid-electric vehicle based on an integrated starter-alternator architecture. The paper describes physically based models of the engine and integrated

Feasibility Study of Jupiter Icy Moons Orbiter Permanent Magnet Alternator Start Sequence
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Abstract The Jupiter Icy Moons Orbiter (JIMO) mission was a proposed,(recently cancelled) long duration science mission to study three moons of Jupiter: Callisto, Ganymede, and Europa. One design of the JIMO spacecraft used a nuclear heat source in conjunction with

Coordination of Loss of Excitation with Capability Curve And Steady State Stability Limit for a Large Alternator
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Abstract With the introduction of availability based tariff in the open access power transfer regime, utilities may derive benefit by proper coordination of Loss of Excitation (LOE) Relay with Generator Capability Curve (GCC) and Steady State Stability Limit (SSSL). The co-

The evaluation of alternator technical condition on the basis of thermovision tests
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The alternator (alternating current generator) is the basic source ensuring the electric energy supply to the battery and electric system of the car. Its power generated in course of low speed operation is sufficiently high which is important during motor vehicle operation in

Classification and estimation of alternator rotational speed and load with the method of multidimensional adaptive regression with the use of spline functions
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The paper presents a method allowing for classification and estimation of rotational speed and load of a car alternator with the method of multidimensional adaptive regression with the use of spline functions (MARSplines). The predictive modeling procedure using this

A Fuzzy Relation Based Fault Diagnosis System for an Alternator
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Abstract:A fault diagnosis system using fuzzy relations to deal with the uncertainties of protective relays and circuit breakers' informations is proposed in this paper. In order to identify faulty section, the fuzzy relations are defined to describe these uncertainly

SPECTRAL STUDY ON THE VOLTAGE WAVEFORM OF CLAW POLE AUTOMOTIVEALTERNATOR
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ABSTRACT An increased number of vehicle functions necessitated by legislation and customer expectations have introduced many electronic control systems and electrically driven units in vehicles. The drastic increase in the non linear loads associated with the

Study of 8/12 Flux Reversal Machine as an Alternator
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Abstract Flux Reversal Machine (FRM), an emerging doubly salient PM motor is well known for retaining advantage of switched reluctance and PM machine. The paper presents study of a Flux Reversal PM machine as an alternator. Analysis, construction, and experimental Abstract: After the successful commissioning of the functional demonstrator of the free piston linear generator at the German Aerospace Center this paper is the first publication of a larger set of measurement results. The aim is to create a baseline of knowledge in regards

High voltage converter design for a belt alternator starter
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Abstract. This paper presents high voltage power converter design, for a belt driven starter alternator. First, electrical and mechanical construction of converter is presented. Next section describes thermal simulation of converter housing to met specified temperature

Development of Dual Frequency Alternator Technology Based Power Source For Military Applications
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Abstract: This paper presents a Dual frequency alternator, which generates power output at 50Hz and 400Hz. In weapon system applications 50Hz and 400Hz power is required to meet the requirement of different loads which operate at different frequencies

High-performance Ball Bearings for Automotive Alternator Applications
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ABSTRACT This report describes the latest ball bearing technology for automotive alternators. Since compact alternators appeared on the auto market, the ball bearings used in them have presented difficulties. These difficulties have been overcome by technical

Efficiency Improvement of an Automotive Alternator by Heat Treatment
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Recently, CO2 emission standards and fuel efficiency legislation has been tightened globally. Therefore automotive alternator performance becomes increasingly important to meet the requirements. Many proposed methods have suggested adding magnets or

Accelerated Life Test Design for Alternator Mag net
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Abstract: Ferrite magnet is widely used in many automotive components such as motors and allemators. Magnets used inside alternators must be in good quality to ensure high level of efciency could be achieved. Recently. magnet manufacturer has found some hairlines

CIRCUIT PERFORMANCE OF A PARASITIC-LOADING DIGITAL SPEED CONTROLLER FOR A 400-HERTZ TURBINE-DRIVEN ALTERNATOR
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ABSTRACT Parasitic speed controllers are used in space power electrical generating systems to maintain the speed of the turbine-driven alternators within specified limits. Selected subcircuits for a solid-state parasitic-loading speed controller were assembled

Optimum Design of Turbo-Alternator using Differential Evolution Algorithms
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Abstract This paper presents the method of selecting an optimum design of turbo alternator using Multi-objective Differential Evolution (MODE) algorithms. In this paper a theoretical problem of turbo-alternator design is considered. In recent years, Genetic Algorithms have

Experimental Study on Six-Phase Synchronous Alternator for Stand-Alone Renewable Energy Generation
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Abstract:A purely experimental analysis is presented in this paper to study the performance characteristics of a six-phase synchronous alternator coupled to a hydro turbine for stand- alone energy generation. It is depicted that the alternator is well suited to supply two

EXPERIMENTAL EVALUATION OF A SNA P-8 TURBINE-ALTERNATOR
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ABSTRACT The steady-state performance of a SNAP-8 turbine-alternator was evaluated as part of an investigation of system startup characteristics. The turbine-alternator accumulated 157 hours and was subjected to 135 startups and shuTdswns, During the test series,

Different Methods of Calculating Static Characteristics of Switched Reluctance Machine used for Alternator-Generator
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Abstract:The design preciseness, the material used in productivity plus the time are coming the most important factors in motor manufacturing. Consequently, the use of interior permanent magnet synchronous machines (IPM) in hybrid vehicle seemed to be the best

INCREASED MOTORBIKE DRIVING RANGE BY ALTERNATOR CRANKSHAFT COUPLING AND DUAL DRIVE
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As modern culture and technology continue to develop, the growing presence of global warming and irreversible climate change draws increasing amounts of concern from the world's population. Countries around the world are working to drastically optimize the use

PROTOTYPE 5 KW STEAM COGENERATOR WITH LINEAR ALTERNATOR
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ABSTRACT A prototype micro-cogeneration system based on a reciprocating steam engine has been built and is now starting its experimental operation. The system has a biomass fuelled boiler, working at moderate pressure (5 bar). A condenser interfaces the steam

WP3: specification for fast Prototyping Using AMS High Voltage IC for Electronic For Interface in Heavy Duty 24V Alternator Regulator Applications
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Using AMS High Voltage IC for Electronic For Interface in Heavy Duty 24V Alternator Regulator Applications European Project AUTOMICS March 2014 I 1 Property of Valeo. Duplication prohibited Confidential For Interface in Heavy Duty 24V Alternator Regulator Applications

Wind Turbine Generation System Implemented With a Claw Pole Alternator
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Abstract: One of small wind turbine expensive constituents is its generator. The automotive alternator is considered as a cheaper alternative for generators in small wind turbines. In this paper, an off-the-shelf recycled automotive claw pole alternator is modeled with an

Design of 20 MVA Three-phase Turbo-Alternator used in Geothermal Energy Production
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Abstract: There are various resources of power to produce electricity in Myanmar. They are biomass, solar, wind, water and geothermal energy. Geothermal energy uses geothermal reservoirs but in a different way as is the case with carbon dioxide storage. At depths

A DIRECT TORQUE CONTROLLED INTEGRATED STARTER ALTERNATOR WITH SPACE VECTOR MODULATION
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Abstract A novel direct torque controlled integrated starter/alternator with space vector modulation of induction machine has been proposed in this paper for future 42V automobiles application. By controlling the stator flux linkage vector properly, the required

Evaluation of Alternative Evolutionary Programming Techniques for Optimization of an AutomotiveAlternator AC Koenig, JM Williams,
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GUEST EDITORIAL Special Section on Cross-Layer Design for Mobile Ad Hoc Networks and Wireless Sensor Networks

Thermal Analysis of Stirling Engine to Power Automotive Alternator Using Heat from Exhaust Gases
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Abstract This paper investigates the development of small scale beta type Stirling engine to recover the exhaust heat from the main engine and to drive the alternator (decouple it from the main engine), thus providing the required electrical power for onboard devices. The

Alternator Charge Control Battery Condition
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Abstract: In order to reduce the green house gas, CO2 from the vehicle, the only possible method is to improve the fuel economy. Nowadays, many vehicle manufacturing companies develop alternator charge control methods and increase the alternator efficiency to

STARTER ALTERNATOR IN ZERO INERTIA CONFIGURATION IMPROVING THE ACCELERATION RESPONSE FROM OVERDRIVE
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ABSTRACT- The fuel economy of a vehicle equipped with an internal combustion engine can be improved by operating the engine at low rotational speeds where its optimum efficiency is found, also known as E-line tracking. However, if the engine is not oversized,

Design of Stirling Engine and Solar Collectors to Run an Automobile Alternator
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Abstract: Stirling cycle engine, a hot gas engine or an external combustion engine, offers potential advantages over conventional engines in fuel choices, noise and emissions. Multi- fuel such as agricultural by-product, biomass, biodiesel, solar energy and etc. can be

Test Characteristics of a Welded Rotor in a 36, 000-RPM Lundell Alternator
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16. Abstract Two four-pole Lundell-type rotors consisting of magnetic and nonmagnetic materials were fabricated by weld-depositing Inconel 625 between two sections of AISI 4617 steel. The rotors had a major diameter of 8. 28 cm (3.26 in.). Saturation curves for load and

Determination of Life for a Polyimide-epoxy Alternator Insulation System
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ABSTRACT Tests were conducted to predict remaining electrical insulation life of a polylmide-epoxy insulated 60 KW, 208 volt homopolar inductor alternator, following completion of 23,130 hours of turbo-alternator endur-ance tests at NASA. The sectioned Abstract An alternator, which converts mechanical rotational energy into electrical energy, is an important component of a vehicle. Alternators operate over a broad range of rotational speeds, typically from 3,000 RPM to 18,000 RPM, which demands a cooling fan producing

Experimental Evaluation of the Free Piston Engine Linear Alternator (FPLA)
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Abstract This report describes the experimental evaluation of a prototype free piston engine linear alternator (FPLA) system developed at Sandia National Laboratories. The opposed piston design wa developed to investigate its potential for use in hybrid electric vehicles (

The influence of geometry pole to the voltage induced of alternator claw-pole
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Abstract The implementation of the numeric methods, capable of solving the equations with partial derivatives, which describe the evolution of the electromagnetic field, have largely modified the designing activity. The manufacture of prototypes was replaced by the

0ptimization of the control of an Integrated Starter Alternator using an induction machine Mechanical sensor role
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Abstract:This paper deals with the control of an Integrated Starter Alternator. Different drives for an induction machine are simulated and compared by drawing up the performances balance of the whole device. Our interest is taken in the speed sensor Galilean invariance, 73 Gaussian chain, 154 gel, 100 generalized Kelvin model, 46 generalized Maxwell model, 46 generalized Newtonian fluids, 8 Gibbs potential, 79 Giesekus, 105 Ginzburg-Landau functional, 204 Girard, 78 good solvent, 158 granular

OPTIMISING PERFORMANCE OF SMALL HAWT'S THROUGH IMPROVED ROTOR/ALTERNATOR MATCHING
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Abstract Horizontal Axis Wind Turbines (HAWT's) are the most common and well understood forms of windmills. Typically a large amount of research and development has been invested in the technology of large scale wind turbines. Development of small machines (

Dynamic analysis of a turbo-alternator shaft using finite element method
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Abstract Dynamic stresses induced in turbo-alternator shaft are important design considerations. It is crucial to understand the complex vibrational mechanisms experienced by a turboalternator shaft. In this paper a dynamic model of the turbo-alternator shaft

IN THE DESIGN OF OPTIMAL TUNING FREQUENCY OF A SINGLE TUNED HARMONIC FILTER FOR AN ALTERNATOR WITH RECTIFIER LOADS
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ABSTRACT Indian electrical industries supply alternators for rectifier loads, arc furnace loads and thyristor load applications to various customers. In such cases the generator line currents are not sinusoidal but are like trapezoidal which are due to harmonics. They may

Design Approach to High Voltage High Power Steam-turbine driven Alternator
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Abstract-The paper deals with the design methodology of high voltage high power alternators driven by steam turbines. These alternators run at a high speed of 3000 rpm in most part of the world (at 3600 rpm in USA) and are of cylindrical pole construction. The

DYNAMIC RESPONSE OF AN ALTERNATOR DURING UNSYMMETRICAL FAULT AT ITS TERMINALS
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ABSTRACT The transient behaviour of an unloaded alternator under unsymmetrical single line to ground fault condition at its terminals is studied. A mathematical model in per unit system based on a hybrid coordinate system is developed combining the abc (stator

Switched Reluctance Machine For A Starter-Alternator Micro-Hybrid Car
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ABSTRACT Living in a world where environment protection and energy conservation are the first worries, the development of hybrid vehicle seems to be an accelerated pace. There for, recent efforts are directed toward developing an improved propulsion system. One of the

AC 2011-1731: PERMANENT MAGNET LINEAR ALTERNATOR MAG-NETIC FIELD ANALYSIS
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Abstract Permanent magnet linear alternators are energy converting devices that have been under research and development for years. This type of alternators have advantages of high efficiency and no need of liner motion to rotation converting, when the driving force is in

Study of electromagnetic field in claw-poles alternator
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ABSTRACT: The paper presents the tridimensional analysis of electromagnetic field of an claw poles alternator, in whose construction has been used non-magnetic material, such aluminum, that form the rings in the rotor's structure. This structure aims to establish lower

Alternator protection, part 2: Alternatives
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Generators sets are commonly to be protected from the effects of overload conditions by equipment that is required by local codes and standards. The standards generally do not stipulate what type of protection device that is required, so a system designer can select

A NEW WINDING DESIGN FOR AUTOMOTIVE ALTERNATOR
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This paper introduces a new design for alternator system that provides dramatic increase in power output as compared to a conventional automotive alternator, along with substantial improvement in efficiency. Experimental results demonstrate these capability

CLASSIFICATION OF DIFFERENT FAULTS IN STATOR OF AN ALTERNATOR
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Abstract: Synchronous generator are important elements of power system. Its reliability and proper functioning are crucial in maintaining an uninterrupted power supply to the customers. Their reliability affects the electric energy availability of the supplied area.

Design, Fabrication and Testing of Regenerative Shock Absorber (Linear Alternator Type)
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Abstract. Almost all the automobiles use shock absorbers to damp out the vibration experienced due to invariably rough roads. The energy in the conventional shock absorbers gets dissipated as heat and is not used in anyway. A regenerative electromagnetic shock

Study of a Nine-Phase Fault Tolerant Permanent Magnet Starter-Alternator
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Abstract The paper presents a study on a nine-phase permanent magnet synchronous starter-alternator for automotive applications, analyzing different converter topologies, detailing the simulation programs and discussing the results in different operating

SOME ASPECTS OF THE ALTERNATOR EFFICIENCY IMPROVEMENT USING POWER CONVERTERS
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A higher automotive DC bus will be soon utilized for a series production. In this paper will be presented the 12V solutions to improve the alternator system efficiency using a power AC- DC converter as a interface with the battery. The command phase angle can produce a

Design of an Interior Permanent-Magnet Synchronous Machine for an Integrated Starter-Alternator System Used on an Hybrid-Electric Vehicle
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Abstract-Nowadays, to reduce fuel consumption, we use more often vehicles with hybrid propulsion using for traction an electric motor and the regular combustion engine. There are three types of hybrid vehicles: serial, parallel and mixed propulsion. Hybrid vehicles use

AN ANN BASED FAULT DETECTION ON ALTERNATOR
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ABSTRACT: Synchronous generators are important elements of a power system. Its reliability and proper functioning are crucial in maintaining an uninterrupted power supply to the customers. Their reliability not only affects the electric energy availability of the

Reactive Power Control of an Alternator with Static Excitation System Connected to a Network
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Abstract In recent years, the scale of power systems has been expanding, and with that expansion smooth power operation is becoming increasingly important. One of the solutions is to realize a practical high speed, highly reliable exciter system that is suitable for stable

Alternator Insulation Evaluation Tests
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16. Abstract Tests were conducted to predict remaining electrical insulation life of a 60 KW homopolar inductor alternator following completion of NASA turbo-alternator endurance

Control of an integrated starter/alternator in automotive applications
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Page 1. Control of an integrated starter/alternator in an automotive application Master of Science Thesis ANDREAS HEDBERG Page 2. Page 3. Control of an integrated starter/alternator in an automotive application. ANDREAS HEDBERG CHRISTOFFER KARLSSON

reverse power protection for alternator



Power Plants Monitoring for Reverse Power Flow Evaluation
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During the reverse power condition alternator runs as synchronous motor and the turbine acts as a load. Motoring protection is mainly for the benefit of the prime mover and load coming on the generator bus-bar while motoring reverse power protection measures the power flow

Analysis of Generator Tripping Incidents on Energizing Nearby Transformers
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of a system condition that war- rants removing the generator from service. Generators G1 and G2 are provided with protection systems including: Loss of excitation protection Differential protection Rotor earth fault protection Reverse power protection Negative sequence

ANALYSIS OF THE BEHAVIOUR OF ASYNCHRONOUS WIND TURBINES UNDER NETWORK FREQUENCY VARIATIONS
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When the frequency and consequently the rotor speed are high, the stationary power curve of the generator changes and the point of maximum power 5). Conventional synchronous units usually include an delayed reverse power protection to avoid turbines damages

Automated analysis of digital fault recorder data in power generating plants
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Reverse power protection circuit breaker change to open

New challenges for protection system
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2.1 Wind generator protection Today's situation with wind generator protection system is not totally clear. Basic functions protection. Rarely there is loss of excitation system protection and reverse power protection. Because

Power System Protection
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Unbalance (46) Anti-Motoring Protection (32) Overexcitation Protection (24) Overvoltage (59) Voltage Unbalance Protection (60) System Backup Protection (51V and 21) Out-of-Step Protection Abnormal Frequency Operation of Turbine-Generator Protection Against

Microturbine power conversion technology review
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Type of generator used in microturbine Synchronous Synchronous Synchronous permanent magnet generator The purchase of an external power meter will facilitate operation with reverse power protection and load following.

Electrical systems of a grid connected 2 MW mini hydro power project at Siripagama
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partial loading, independent control of real and reactive power and commonness, it is decided to use a Synchronous generator as the alternator of this Protection for each Generator and Turbine unit were provided Reversepowerprotection was made with minimum power setting

Reference Guide
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on arrival. Text ESC (Capital letters in the frame) buttons on the front panel Break Return (Italic) set points Generator protections (Bold) Set point group Cyan background Valid for IS-NT only Conformity declaration Following

Laboratory Simulation of Generator Protection
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There are different types of generator protection which are existing in actual field like reverse power protection, stator and rotor earth fault protection, negative phase sequence protection, over current protection, over voltage protection etc.

Impact of breaker failure on stability electricity power transmission system
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damage. Some of these abnormal operating conditions are accompanied by very low current flow through the generator breaker. Reverse power protection is one such protection element that is often used for normal shutdown of a steam

NERC Protection Coordination Webinar Series July 15, 2010
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Functions Functions that do not Require Coordination with the Transmission System Protection Functions 32 Re erse Po er Protection ReversePowerProtection 87G Generator Differential Protection 87T Transformer Differential Protection

Power Plant and Transmission System Protection Coordination Fundamentals
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Transmission System Transformer Supplied Scheme Page 26. 26 Reverse Power Protection (Function 32) Protection measures reverse power derived from the real component of generator voltage times generator stator current times the square root of three.

Practical Simulation of Power System Protection Laboratory Experiments Using Construction-wise Classified Relays
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REVERSE POWER PROTECTION is required against reversal of power in a power system. If the input to the prime-mover of any of alternators stops, the bus bar starts feeding the alternator and it runs as synchronous motor.

Callide C Power Stations Generator Protection System ride through capabilities for various external faults
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19 3.2 Generator Protection Settings .. 21 3.2.1 Earth Fault Protection (51N, 59N). 23 3.2.2 Voltage Dependent Overcurrent (51V). 26 3.2.3 Reverse Power Protection (32R

System Islanding Using a Modern Decoupling System
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If the system is transiently unstable, it will cause large separation generator rotor angles, large swings of power flows, and large tie breakers (CB2 and CB3) are closed, different settings for reverse power are selected (refer to Table I). The reverse power protection function is

Course: EE801 Power System Analysis Control
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Unit-III Protection Types detection of faults and their effects, alternator protection scheme (stator, rotor, reverse power protection etc.). Power transformer protection (external and internal faults protection), generator-transformer unit protection scheme, bus bar protection.

Sulimani-unversity 6x2200KVA Generators Parallel operation
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Page 33. 28 7 Generator Protective Features (alternator) the following are the trip setting for the generator/alternator IEEE std [1], [3]. 1-over voltage (59) 5-reverse power (inverse time delay) (32) Reverse power protection prevents generator from motoring on loss of

Revision history
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The generator's excitation control mode must best suit the local environmental conditions. guaranteed operating time capability, as well as the requirements for governor control using a 4% droop characteristic, required by turbo-alternators.

Bibliography of relay literature, 2004 IEEE committee report
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to avoid all nuisance reverse power trips during the normal start-up and to optimize relay settings without sacrificing any reverse power protection. New Generator Incomplete Differential Protection Based on Wavelet Transform,

Strengthening the First Line of Defence: Delayed Turbine Trip at SCRAM in Westinghouse type NPP's
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This can continue till the turbine Reverse-Power-Protection triggers and the turbine is switched off. At this time, the transient on the secondary water-steam-cycle and the electrical system is one or two orders of magnitude smaller. The grid is stabilised by the running generator

Interim Test Procedures for Evaluating Electrical Performance and Grid Integration of Vehicle-to-Grid Applications
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in Figure 1. In this configuration, the utility connection is made using the same power electronics that are used for the motor/generator (M/G The reverse power test is performed to characterize the accuracy of the reverse power protection magnitude setting(s) of the V2G DUT.

Wavelet Based Diagnosis and Protection of Electric Motors
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permanent magnet synchronous motor, self-excited induction generator, and doubly fed induction generator are developed protection, under and over voltage protection, negative phase sequence protection, field failure protection, reverse power protection, over speed to this purpose [2]. Nevertheless, some of the essential properties of the two most important types of alternators will be 9.4 Variable Speed Generator Systems with Inverter An Alternator operated with variable speed inevitably generates alternating current with varying frequency.

METERING AND ADAPTIVE PROTECTION
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Current Transformer CTI Coordination Time Interval DC Direct Current DG Distributed Generation/Generator DLG Double line to ground Hz Hertz 119 Figure 5.41 Utility Generator current RMS during Test Case 4 120

HINDUSTAN ZINC LIMITED
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Circuit Breaker CT Current Transformer PT Potential Transformer DG Diesel Generator Page

A new algorithm for load shedding in an industrial cogeneration power plant
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53 3.1.5 Stability Studies 54 3.1.6 Protection Considerations 55 3.1.6.1 Pole Slip up Protection 55 3.1.6.2 ReversePowerProtection 55 3.1.7 Interlocking CB Closing 56 3.1.8 Signalling 56 3.1.8.1 High Voltage Isolation 57 3.1.9 Auto Reclose 58

Distributed Power Generation in Europe: technical issues for further integration
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Figure 3.1 Separate and combined heat and power production. Figure 3.2 Present grid architecture complemented with DG system. Figure 4.1 A diesel-fuelled ICE with the coupled generator. Figure 4.2 A combustion turbine scheme. Figure 4.3 A microturbine scheme.

Source Basics
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Agenda Types of sources CW Swept Signal Generator Summary 2 4 H Source Basics Page 7. cal t Accuracy = 152 Hz +_ 2 5 H Source Basics Page 8. Slide #6 Range, accuracy, resolution, switching speed, and reverse power protection are the main amplitude specifications.

Condition Monitoring of Rotating Electrical Machines
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189 9 Electrical techniques: current, flux and power monitoring 193 9.1 Introduction 193 9.2 Generator and motor stator faults 193 9.2.1 Generator stator winding fault detection 193 9.2.2 Stator current monitoring for stator faults 193 9.2.3 Brushgear fault detection 194

Clean Power at Home
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Page 1. Clean Power at Home May, 1999 Author: Andrew E. Pape, MRM Compass Resource Management Ltd. Project Authorities: The Solar Energy Society of Canada Inc, Ottawa. The Association for the Advancement of Sustainable Energy Policy, Vancouver.

Specifications Guide
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Page 12. 12 Chapter 1 E7401A Specifications and Characteristics Frequency Tracking Generator On (Option 1DN) 50 ms is the minimum sweep time Fast Time-domain Sweep (Option AYX) (For Span = 0 Hz, RBW = 1 kHz) 50 ns to 4000 s b Accuracy (Span = 0 Hz)

Strathprints Institutional Repository
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There are several instances when an under voltage is detected but should not cause disconnection of the generator, such as a directional protection, earth fault protection, reverse powerprotection, check-synchronism, phase unbalanced protection, etc.

Combustion Turbines: Critical Losses and Trends
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They can be operated in simple cycle or combined cycle mode. In combined cycle, they are used with a steam turbine. For this a heat recovery steam generator is utilized. 5 Figure 1: Combined cycle cogeneration plant HRSG = Heat recovery steam generator.

Grid Interconnection and Performance Testing Procedures for Vehicle-To-Grid (V2G) Power Electronics
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1. In this configuration, the utility connection is made using the same power electronics that are used for the traction motor/generator (M/G), thus eliminating the need for The reverse power test is performed to characterize the accuracy of the reverse power protection magnitude

1.1 Types of Transformer Faults
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1.4. 4 Unit Systems A unit system consists of a generator and associated step-up transformer. The generator winding is connected in wye with the neutral connected to ground through a high impedance grounding system. The


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