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Author : Héctor Adolfo Landa Barbato
Publisher :
ISBN 13 :
Total Pages : 256 pages
Book Rating : 4.:/5 (184 download)
Download or read book Derating of Induction Motors Due to Harmonics and Voltage Unbalance written by Héctor Adolfo Landa Barbato and published by . This book was released on 1987 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Maher Al-Badri
Publisher :
ISBN 13 :
Total Pages : 216 pages
Book Rating : 4.:/5 (111 download)
Download or read book Algorithms for Induction Motor Efficiency Determination written by Maher Al-Badri and published by . This book was released on 2015 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Induction motors are the most predominant motors used in the industry. They use two-thirds of the total electrical energy generated in the industrialized countries. Motors fail due to many reasons and many are rewound two or more times during their lifetimes. It is generally assumed that a rewound motor is not as efficient as the original motor. Precise estimation of efficiency of a refurbished motor or any existing motor is crucial in industries for energy savings, auditing and management. Full-load and partial load efficiency can be determined by using the dynamometer procedure which is a highly expensive way and available only in well-equipped laboratories. An inexpensive and easily applied procedure for efficiency estimation is therefore a target of researchers and engineers in the field. In this Ph.D. work, two novel methods for estimating repaired, refurbished, or any existing induction motors’ efficiency are proposed. The two methods (named Method A and Method B) require only a DC test (including temperature measurement), nameplate details, and RMS readings of no-load input power, input voltage, and input current. Experimental and field results of testing a total of 196 induction motors by using Method A are presented and the degree of accuracy is shown by comparing the estimated efficiencies to the measured values. Method B was validated by testing 8 induction motors with acceptable accuracy. To provide the necessary credits to the proposed techniques, an error analysis study is conducted to investigate the level of uncertainty through testing three induction motors, and the results of uncertainty of the direct measurements and no-load measurements using the proposed technique are declared. Derating is a necessary procedure to protect induction motors from overheating which is the main reason of motor failures. The overheating is caused by operating induction motors with unbalanced voltages, over or undervoltage, or harmonics rich power supplies. To derate a machine, its full-load efficiency with balanced undistorted voltages and with unbalanced or distorted voltages must be measured. In many situations in industry and due to critical processes, it is not allowed to interrupt induction machines operation. Hence, an in situ efficiency estimation technique is most required. In this thesis, three novel in situ efficiency estimation algorithms are proposed. The first algorithm is to estimate the full-load and partial loads efficiency of induction motors operating with balanced undistorted voltages. The algorithm is validated by testing 30 induction motors with acceptable accuracy. The second proposed algorithm is for full-load efficiency estimation of induction motors operating with unbalanced voltages. The technique is evaluated by testing 2 induction motors with different levels of voltage unbalance. The results showed an acceptable accuracy. The third proposed algorithm is for full-load efficiency estimation of induction motors operating with distorted unbalanced voltages where the harmonics effect is added. The technique is evaluated by testing 2 induction motors with different levels of voltage unbalance. The results showed an acceptable accuracy. The three novel algorithms are designed by using Genetic Algorithm, pre-tested data, and IEEE Method F1 calculations.
Author : David Springer
Publisher :
ISBN 13 :
Total Pages : 292 pages
Book Rating : 4.:/5 (226 download)
Download or read book Experimental Three Phase Induction Motor Derating Due to Thermal Stress Caused by Voltage Unbalance written by David Springer and published by . This book was released on 2007 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joseph R. Moser
Publisher :
ISBN 13 :
Total Pages : 128 pages
Book Rating : 4.:/5 (89 download)
Download or read book Derating of Polyphase Induction Motors Due to External Unbalance written by Joseph R. Moser and published by . This book was released on 1956 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Martin M. Berndt
Publisher :
ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.:/5 (89 download)
Download or read book Theoretical and Experimental Methods of Derating Polyphase Induction Motors Under Conditions of Fixed Line Voltage Unbalance written by Martin M. Berndt and published by . This book was released on 1957 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ion Boldea
Publisher : CRC Press
ISBN 13 : 1420042653
Total Pages : 965 pages
Book Rating : 4.4/5 (2 download)
Download or read book The Induction Machine Handbook written by Ion Boldea and published by CRC Press. This book was released on 2010-12-12 with total page 965 pages. Available in PDF, EPUB and Kindle. Book excerpt: Often called the workhorse of industry, the advent of power electronics and advances in digital control are transforming the induction motor into the racehorse of industrial motion control. Now, the classic texts on induction machines are nearly three decades old, while more recent books on electric motors lack the necessary depth and detail on ind
Author : Hussain Mahdi
Publisher : GRIN Verlag
ISBN 13 : 3668273855
Total Pages : 84 pages
Book Rating : 4.6/5 (682 download)
Download or read book Fault diagnosis of induction motor fed by frequency converter. The signal signature analysis technique written by Hussain Mahdi and published by GRIN Verlag. This book was released on 2016-08-12 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thesis (M.A.) from the year 2013 in the subject Electrotechnology, Warsaw University of Technology (Electrical Engineering), language: English, abstract: 3-Phase induction motors are widely used as a source of mechanical power for effective operation and low costs. The abnormalities have to be detected in advance to avoid the motor breakdown and the cost associated restrain of plant production. This work discusses current and flux leakage spectral analysis techniques for the diagnosis of broken rotor bars and shortcircuited turns in induction motor fed from different AC sources. In spite of recent development of various types of models toward motor faults diagnosis and examining different problems associated with 3-phase induction motors the signal spectral analysis is considered as one of most important approaches. Most of the models from simple equivalent circuit to more complex d-q and a-b-c models and lastly developed hybrid models are provided for the integration of different forms of current and/or voltage unbalance. Generally, techniques that relate to asymmetry identify asymmetrical motor faults. Frequency converters in many applications feed induction motors. Such applications, which play a major role in industry, are growing at a high rate, allow to use 3-phase induction motor as variable speed applications. This paper proposes application of spectral signature analysis for the detection and diagnosis of abnormal electrical and mechanical conditions, which indicates chosen faults in induction motor fed by frequency converter.
Author : Deepakkumar J. Gandhi
Publisher :
ISBN 13 :
Total Pages : 572 pages
Book Rating : 4.:/5 (891 download)
Download or read book Analysis of the Effects of Power System Unbalance on Three-phase Induction Motors written by Deepakkumar J. Gandhi and published by . This book was released on 1976 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ion Boldea
Publisher : CRC Press
ISBN 13 : 1000056821
Total Pages : 475 pages
Book Rating : 4.0/5 ( download)
Download or read book Induction Machines Handbook written by Ion Boldea and published by CRC Press. This book was released on 2020-05-19 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: Induction Machines Handbook: Transients, Control Principles, Design and Testing presents a practical up-to-date treatment of intricate issues with induction machines (IM) required for design and testing in both rather constant- and variable-speed (with power electronics) drives. It contains ready-to-use industrial design and testing knowledge, with numerous case studies to facilitate a thorough assimilation of new knowledge. Individual Chapters 1 through 14 discuss in detail the following: Three- and multiphase IM transients Single-phase source IM transients Super-high-frequency models and behavior of IM Motor specifications and design principles IM design below 100 kW and constant V1 and f1 IM design above 100 kW and constant V1 and f1 IM design principles for variable speed Optimization design Single-phase IM design Three-phase IM generators Single-phase IM generators Linear induction motors Testing of three-phase IMs Single-phase IM testing Fully revised and amply updated to add the new knowledge of the last decade, this third edition includes special sections on Multiphase IM models for transients Doubly fed IMs models for transients Cage-rotor synchronized reluctance motors Cage-rotor PM synchronous motor Transient operation of self-excited induction generator Brushless doubly fed induction motor/generators Doubly fed induction generators with D.C. output Linear induction motor control with end effect Recent trends in IM testing with power electronics Cage-PM rotor line-start IM testing Linear induction motor (LIM) testing This up-to-date book discusses in detail the transients, control principles, and design and testing of various IMs for line-start and variable-speed applications in various topologies, with numerous case studies. It will be of direct assistance to academia and industry in conceiving, designing, fabricating, and testing IMs (for the future) of various industries, from home appliances, through robotics, e-transport, and renewable energy conversion.
Author : Frank Kreith
Publisher : CRC Press
ISBN 13 : 9780849325144
Total Pages : 1146 pages
Book Rating : 4.3/5 (251 download)
Download or read book CRC Handbook of Energy Efficiency written by Frank Kreith and published by CRC Press. This book was released on 1996-10-24 with total page 1146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Addressing the needs of engineers, energy planners, and policy makers, CRC Handbook of Energy Efficiency provides up-to-date information on all important issues related to efficient energy use, including: Efficient energy technologies Economics Utility restructuring Integrated resource planning Energy efficient building design Industrial energy conservation Wind energy Solar thermal systems Photovoltaics Renewable energy Cogeneration Fossil fuel cost projections The rapid changes that characterize the technology of energy generation systems, and the forthcoming competition among energy producers, make this handbook a must for anyone involved in the science, technology, or policy of energy. The 53 expert contributors from industry, government, and universities, and the 600+ figures and tables make CRC Handbook of Energy Efficiency a professional and valuable resource.
Author : Hermenegildo Balbino Reyes
Publisher :
ISBN 13 :
Total Pages : 270 pages
Book Rating : 4.E/5 ( download)
Download or read book Induction Motor, Its Theory and Operation Under Unbalanced Voltage Conditions written by Hermenegildo Balbino Reyes and published by . This book was released on 1919 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Abhishek Chauhan
Publisher : Anchor Academic Publishing
ISBN 13 : 3960670818
Total Pages : 49 pages
Book Rating : 4.9/5 (66 download)
Download or read book Power Quality Issues and Their Impact on the Performance of Industrial Machines written by Abhishek Chauhan and published by Anchor Academic Publishing. This book was released on 2016-10 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: Power supply quality concerns are the consequences of the increasing use of solid state switching devices, power electronically switched loads, unbalanced power systems, lightning controls, computer and data processing equipment, as well as industrial plant rectifiers and inverters. In this book, special prominence is given to the degrading of power quality due to unbalanced power supply. Moreover, the impact of unbalanced voltage on the performance of three-phase induction motors are also underlined. Three-phase induction motors are broadly used in diverse industrial applications while unbalances in supply voltage are responsible for various ailing impacts on their performance. Furthermore, the variation of performance parameters of three-phase induction motors have been analysed. Additionally, various existing methods for the assessment of the performance induction motor under the supply voltage unbalance have been critically reviewed to underline their shortcomings. The causes, effects, mitigation techniques along with the various interpretations of voltage unbalance, prescribed in different standard, are also discussed to highlight their deficits.
Author : R. Sastry Vedam
Publisher : CRC Press
ISBN 13 : 1420064827
Total Pages : 304 pages
Book Rating : 4.4/5 (2 download)
Download or read book Power Quality written by R. Sastry Vedam and published by CRC Press. This book was released on 2017-12-19 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Both deregulation in the electrical supply industry and the creation of new electricity markets present electric utility companies with the challenge of becoming more efficient without compromising quality of service. Providing new solutions for this newly deregulated paradigm, Power Quality: VAR Compensation in Power Systems presents comprehensive coverage of power quality, harmonics, and static var compensators in one single volume. The book explains how to ensure that power quality is not affected by the harmonics generated by power electronic equipment and explains how to reduce labor costs and increase reliability of supply by employing a single pole autoreclosing scheme. It also addresses how to analyze frequency response of current transformers and voltage transformers while measuring harmonics. Based on the authors’ extensive experience in the electric supply industry, Power Quality enables engineers to meet the demands of increased loads, strengthen their transmission systems, and ensure reliable electric supply.
Author : D. Yogi Goswami
Publisher : CRC Press
ISBN 13 : 1420003488
Total Pages : 1568 pages
Book Rating : 4.4/5 (2 download)
Download or read book Handbook of Energy Efficiency and Renewable Energy written by D. Yogi Goswami and published by CRC Press. This book was released on 2007-05-07 with total page 1568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brought to you by the creator of numerous bestselling handbooks, the Handbook of Energy Efficiency and Renewable Energy provides a thorough grounding in the analytic techniques and technological developments that underpin renewable energy use and environmental protection. The handbook emphasizes the engineering aspects of energy conservation and renewable energy. Taking a world view, the editors discuss key topics underpinning energy efficiency and renewable energy systems. They provide content at the forefront of the contemporary debate about energy and environmental futures. This is vital information for planning a secure energy future. Practical in approach, the book covers technologies currently available or expected to be ready for implementation in the near future. It sets the stage with a survey of current and future world-wide energy issues, then explores energy policies and incentives for conservation and renewable energy, covers economic assessment methods for conservation and generation technologies, and discusses the environmental costs of various energy generation technologies. The book goes on to examine distributed generation and demand side management procedures and gives a perspective on the efficiencies, economics, and environmental costs of fossil and nuclear technologies. Highlighting energy conservation as the cornerstone of a successful national energy strategy, the book covers energy management strategies for industry and buildings, HVAC controls, co-generation, and advances in specific technologies such as motors, lighting, appliances, and heat pumps. It explores energy storage and generation from renewable sources and underlines the role of infrastructure security and risk analysis in planning future energy transmission and storage systems. These features and more make the Handbook of Energy Efficiency and Renewable Energy the tool for designing the energy sources of the future.
Author : Ewald F. Fuchs
Publisher : Academic Press
ISBN 13 : 0128178574
Total Pages : 1284 pages
Book Rating : 4.1/5 (281 download)
Download or read book Power Quality in Power Systems, Electrical Machines, and Power-Electronic Drives written by Ewald F. Fuchs and published by Academic Press. This book was released on 2023-02-13 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Power Quality in Power Systems, Electrical Machines, and Power-Electronic Drives uses current research and engineering practices, guidelines, standards, and regulations for engineering professionals and students interested in solving power quality problems in a cost effective, reliable, and safe manner within the context of renewable energy systems. The book contains chapters that address power quality across diverse facets of electric energy engineering, including AC and DC transmission and distribution lines; end-user applications such as electric machines, transformers, inductors, capacitors, wind power, and photovoltaic power plants; and variable-speed, variable-torque power-electronic drives. The book covers nonsinusoidal waveshapes, voltage disturbances, harmonic losses, aging and lifetime reductions, single-time events such as voltage dips, and the effects of variable-speed drives controlled by PWM converters. The book also reviews a corpus of techniques to mitigate power-quality problems, such as the optimal design of renewable energy storage devices (including lithium-ion batteries and fuel cells for automobiles serving as energy storage), and the optimal design of nonlinear loads for simultaneous efficiency and power quality. Provides theoretical and practical insights into power-quality problems related to future, smart grid, renewable, hybrid electric power systems, electric machines, and variable-speed, variable-torque power-electronic drives Contains a highly varied corpus of practical applications drawn from current international practice Designed as a self-study tool with end-of-chapter problems and solutions designed to build understanding Includes very highly referenced chapters that enable readers to save time and money in the research discovery process for critical research articles, regulatory standards, and guidelines
Author : Mustafa Akyuz
Publisher :
ISBN 13 :
Total Pages : 152 pages
Book Rating : 4.:/5 (132 download)
Download or read book Heating and Derating of Three-phase Induction Motors with Unbalanced Line Voltages written by Mustafa Akyuz and published by . This book was released on 1964 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ross Elmer Cullings
Publisher : Forgotten Books
ISBN 13 : 9780265837429
Total Pages : 52 pages
Book Rating : 4.8/5 (374 download)
Download or read book The Effect of Voltage Unbalance on the Output of a Two-Phase Induction Motor written by Ross Elmer Cullings and published by Forgotten Books. This book was released on 2017-10-27 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Effect of Voltage Unbalance on the Output of a Two-Phase Induction Motor: Thesis These motors can therefore be used amongst inflammable material, in dirty places etc., with perfect safety and without any trouble of Operation. These motors are almost indestructible. They are simple of construction and of operation and cost very little for attendence and maintainance. They run at nearly constant speed for all loads, have a high efficiency and a good power factor. Thus it can be seen that in duction motors are suitable for practically universal use. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
