Electric machinery
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Electric Machinery is a 704-page textbook on electric machinery by A. E. Fitzgerald, Jr., Charles Kingsley, and Stephen D. Umans. The sixth edition has been extensively updated while retaining an emphasis on fundamental principles and physical understanding. It covers both fundamental concepts in detail as well as advanced topics. Several new chapters have been added, including ones on power electronics and speed and torque control of dc and ac motors. MATLAB examples and problems have also been incorporated into this expanded new edition.
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Electric Machinery.pdf
This document provides information about the sixth edition of the textbook "Electric Machinery" by A.E. Fitzgerald, Charles Kingsley Jr., and Stephen D. Umans. It was published in 2003 by McGraw-Hill and covers topics related to electromechanical energy conversion and various types of electric machines including synchronous machines, induction machines, dc machines, and single-phase machines. New to this edition is a chapter on power electronics and expanded coverage of machine control, including field-oriented control of synchronous and induction machines.
Electrical Machines and Drives_ Fundamentals and Advanced Modelling ( PDFDriv...
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Simulation Model solves exact the Enigma named Generating high Voltages and h...
Simulation model of Tesla coil has been successfully completed, and has been verified the procedure and functioning. The literature and documentation for the model were taken from the rich sources, especially the copies of Tesla patents. The oscillating system‟s electrical scheme consists of the voltage supply 220/50 Hz, Fe transformer, capacitor and belonging chosen electrical components, the air gap in the primary Tesla coil (air transformer) and spark gap in the exit of the coil. The investigation of the oscillating process Tesla coil‟s system using the simulation model in MATLAB & SIMULINK have given the exact solution the enigma named the generating high voltage and high frequency the Tesla‟s coil. The inductance voltage from the spark current in the primary (coil) with its high voltage impulse excites the oscillating series circuit Ce-L3-R3 on the secondary of the air transformer to its own damped oscillations.
T. J. E. Miller Special Machines
This document provides an introduction and summary of the book "Brushless Permanent-Magnet and Reluctance Motor Drives" by T. J. E. Miller. It discusses how the book aims to help engineers better understand brushless DC motor theory in order to more widely apply these motors. It also notes how the book covers recent developments in permanent magnet materials, power electronics, control systems, and motor design that have improved brushless motor technology. The book takes an academic approach, focusing on theory and examples over comparisons or specific design guidance.
Brushless_Permanent_Magnet_and_Reluctance_Motor_Drives__Monographs_in_Electri...
This document provides an introduction and summary of the book "Brushless Permanent-Magnet and Reluctance Motor Drives" by T. J. E. Miller. It discusses how there remains significant potential for innovation in electric motors and drives over a century after Faraday's work. The book aims to explain the theory behind brushless DC motor drives to help engineers better understand and apply these motor types. It also seeks to raise acceptance of new motor technologies, and explore recent developments in permanent magnet materials, power electronics, control systems, and motor design that enable new motor applications. The book takes an academic approach, focusing on theory and examples over design practices or technology comparisons.
Electrical Engineering - Power System Analysis Short-Circuit Load Flow and Ha...
Electrical Engineering - Power System Analysis Short-Circuit Load Flow and Ha...Gollapalli Sreenivasulu
This document provides a summary of the book "Power System Analysis: Short-Circuit Load Flow and Harmonics" by J.C. Das. The book covers topics such as short-circuit currents and symmetrical components, unsymmetrical fault calculations, matrix methods for network solutions, current interruption in AC networks, application and ratings of circuit breakers and fuses according to ANSI standards, short-circuit of synchronous and induction machines, short-circuit calculations according to ANSI and IEC standards, calculations of short-circuit currents in DC systems, load flow over power transmission lines, load flow methods, reactive power flow and control, three-phase and distribution system load flow, optimization techniques, optimal power flow, and harmonics generationA New Switched-Capacitor Five-Level Inverter Suitable for Transformerless Gri...
Transformerless grid-connected inverters have been extensively popular in renewable energy-based applications owing to some interesting features like higher efficiency, reasonable cost and acceptable power density. The major concern of such converters is the leakage current problem and also the step-down feature of the output voltage which causes a costly operation for a single stage energy conversion system. A new five-level transformerless inverter topology is presented in this study, which is able to boost the value of the input voltage and can remove the leakage current problem through a common-grounded architecture. Here, providing the five-level of the output voltage with only six power switches is facilitated through the series-parallel switching of a switched-capacitor module. Regarding this switching conversion, the self- voltage balancing of the integrated capacitors over a full cycle of the grid’s frequency can be acquired. Additionally, to inject a tightly controlled current to the local grid, a peak current controller-based technique is employed, which can regulate both the active and reactive power support modes. Theoretical analyses besides some experimental results are also given to corroborate the correct performance of the proposed topology.
Integration of Supercapacitor in Photovoltaic Energy Storage: Modelling and C...
Due to the variable characteristics of photovoltaic energy production or the variation of the load, batteries used in storage systems renewable power can undergo many irregular cycles of charge 1 discharge. In turn, this can also have a detrimental effect on the life of the battery and can increase project costs. This paper presents an embedded energy share method between the energy storage system (battery) and the auxiliary energy storage system such as supercapacitors (SC). Supercapacitors are used to improve batteries life and reduce their stresses by providing or absorbing peaks currents as demanded by the load. The photovoltaic cells are connected to DC bus with boost converter and controlled with MPPT algorithm, Supercapacitors and batteries are linked to the DC bus through the buck-boost converter. The inductive load is connected to the DC bus by a DC-AC converter. The static converters associated with batteries and supercapacitors are controlled by current. The components of the systems are supervised through a block of energy management. The complete model of the system is implemented in MATLAB/Simulink environment. Simulation results are given to show the performance of the proposed control strategy, for the overall system.
A different visions for uninterruptible load using hybrid solar-grid energy
A different visions for uninterruptible load using hybrid solar-grid energyInternational Journal of Power Electronics and Drive Systems
Attempting to reduce the existing electricity consumption bill, as well as the stability and non-outage grid recharge with the lowest possible cost and suitable quality, is one of the most important goals for those interested in energy around the world. This paper study the circumstances surrounding the Egyptian society to find the best solutions to a achieved this goals, and it was found that solar energy is one of the best alternatives available for energy. Firstly will be study the electricity consumption bill, slice prices and a program was made to calculate the consumption invoice moreover another program for quick estimation to the proposed solar system.The proposed system provides a smart integration between the solar system and grid, where the supply sustainability and the optimal cost are considered. This configuration allows the two sources separately or simultaneously supply the loads depending on photovoltaic extracted energy. Operational analysis of the proposed system will discussed in this paper. The proposed system consists of solar cells, charge controller, batteries and inverter plugged to automatic transfer switches (ATS) using Programmable Logic Control (PLC). The system grantee a safe and reliable load feeding independently on the grid status. The system durability is the most depicted feature through the modelling and experimentally results. A typical case studies for about four years of non-outages photovoltaic-grid hybrid supply (the implemented system) will be presented and discussed.A Unified Control and Power Management Scheme for PV-Battery-Based Hybrid Mic...
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Electrical circuit modeling of PEMFC by EIS
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Basic electronics for scientists and engineers
Here are the key points about Kirchoff's laws:
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- Kirchoff's Voltage Law (KVL) states that the sum of voltages around any closed loop is zero. It expresses conservation of energy.
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This paper presents the implementation of a generalized photovoltaic model
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This document presents a modeling of a 185W mono-crystalline solar panel using MATLAB/Simulink. Meteorological data on temperature and irradiance from August to December 2017 at a location in Johor, Malaysia is used as inputs. Equations for photovoltaic modeling are implemented in subsystems representing the single diode circuit model. The output is current-voltage and power-voltage curves which are compared to the panel specifications to analyze performance. The modeling provides a tool to evaluate the efficiency of the solar panel under varying weather conditions.(eBook - CRC Press) - Electrical Energy Systems (2000).pdf
This document provides an overview of Electrical Energy Systems by Mohamed E. El-Hawary. It discusses the brief history of electric power systems from Edison's first power plant in 1881 to the development of alternating current systems and induction motors. The structure of modern power systems is also introduced, which include power generation, transmission, distribution and various components like generators, transformers and motors. The chapters covered in the book are outlined dealing with topics such as power generation, transmission, faults and protection, and energy management systems.
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using MATLAB/ Simulink software package. The proposed model is user friendly and can be used as a common
platform for both applied physics scientist and power electronics engineers. A detailed modeling procedure is
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Mathematical Modeling and Simulation of Photovoltic Array
With the increasing demand of power and depleting resources, PV based power system has been a ray of hope
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A new exact equivalent circuit of the medium voltage three-phase induction m...
This paper proposes a new equivalent circuit for medium voltage and great power induction motors considering the more complete information given by the manufacturer. A methodology for obtaining the parameters of the equivalent circuit is presented, having this circuit the advantage of allowing the electrical calculation of all the power losses and the realization of the power balance. It is an achievement of this work a new way of calculating and representing the additional losses using a resistance located in the rotor circuit. Then, three types of losses are considered as a part of a power balance: the conventional or joule effect variable losses, the constant losses, and the additional losses. The proposed method is straight and non-iterative. It was applied to a case study motor of 6000 V and 2500 kW located at the Maximo Gomez Power Plant in Cuba.
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Electric machinery
- 1. Electric Machinery By A. E. Fitzgerald, Jr., Charles Kingsley, Stephen D. Umans, Stephen Umans, * Publisher: McGraw-Hill Science/Engineering/Math * Number Of Pages: 704 * Publication Date: 2002-07-25 * ISBN / ASIN: 0073660094 Book Description: The exciting new sixth edition of Electric Machinery has been extensively updated while retaining the emphasis on fundamental principles and physical understanding that has been the outstanding feature of this classic book. This book covers fundamental concepts in detail as well as advanced topics for readers who wish to cover the material in more depth. Several new chapters have been added, including a chapter on power electronics, as well as one on speed and torque control of dc and ac motors. This edition has also been expanded with additional examples and practice problems. The use of MATLAB has been introduced to the new edition, both in examples within the **** as well as in the chapter problems. ----------------- www.arabswell.com