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Author : Thomas A. Nichols
Publisher :
ISBN 13 :
Total Pages : 160 pages
Book Rating : 4.:/5 (31 download)
Download or read book A Practical Method for Load and Efficiency Estimation of Polyphase Induction Motors written by Thomas A. Nichols and published by . This book was released on 1993 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wenzhong Ma
Publisher : John Wiley & Sons
ISBN 13 : 1118981030
Total Pages : 136 pages
Book Rating : 4.1/5 (189 download)
Download or read book Energy-saving Principles and Technologies for Induction Motors written by Wenzhong Ma and published by John Wiley & Sons. This book was released on 2018-02-12 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique guide to the integration of three-phase induction motors with the emphasis on conserving energy • The energy-saving principle and technology for induction motor is a new topic, and there are few books currently available; this book provides a guide to the technology and aims to bringabout significant advancement in research, and play an important role in improving the level of motor energy saving • Includes new and innovative topics such as a case study of energy saving in beam pumping system, and reactive compensation as a means of energy saving • The authors have worked in this area for 20 years and this book is the result of their accumulated research and expertise. It is unique in its integration of three-phase induction motors with the emphasis on conserving energy • Integrates the saving-energy principle, technology, and method of induction motors with on-site experiences, showing readers how to meet the practical needs and to apply the theory into practice. It also provides case studies and analysis which can help solve problems on-site
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 : Wade H. Shafer
Publisher : Springer Science & Business Media
ISBN 13 : 1461519691
Total Pages : 426 pages
Book Rating : 4.4/5 (615 download)
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 38 (thesis year 1993) a total of 13,787 thesis titles from 22 Canadian and 164 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 38 reports theses submitted in 1993, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.
Author : Paul Cochran
Publisher : CRC Press
ISBN 13 : 1482224119
Total Pages : 704 pages
Book Rating : 4.4/5 (822 download)
Download or read book Polyphase Induction Motors, Analysis written by Paul Cochran and published by CRC Press. This book was released on 2018-10-08 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: Generously illustrated with over 1600 dispaly equations and more than 145 drawings, diagrams and photographs, this book is a handy, single-source reference suited to readers with a wide span of educational backgrounds and technical experience. Comprehensive in both scope and depth this manual covers all significant aspects of the field, such as Amperes Law and Faraday's Law, emphasing basic explanations of motor behaviour, derives all important equations and relationships required to analyze, design and apply polyphase induction motors, uses worldwide SI units or international MKS system of units as well as practical units used in the US and shows how to apply working equations to real-life situations with numerical examples... and more.
Author : Aleksandr S. Nagornyy
Publisher :
ISBN 13 :
Total Pages : 126 pages
Book Rating : 4.:/5 (567 download)
Download or read book Evaluation of the Stray Load Losses for a Three-phase Induction Motor written by Aleksandr S. Nagornyy and published by . This book was released on 2003 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: The evaluation of the stray-load losses in induction motors is an important part of the efficiency estimation process. However, stray-load losses have several components which are difficult to isolate and calculate. Consequently, they are more readily determined by test. IEEE Standard 112-1996 recommends the testing of electrical induction motors at a rated mode (nominal frequency and voltage). Thus, the IEEE 112 test does not provide us with information about the motor efficiency and stray load losses at supply frequencies which are different from the rated value. At the same time, this information is very important for the correct evaluation of the efficiency of the motors, controlled by the Adjustable Speed Drives (ASDs). This work is dedicated to the investigation of the relation between the motor efficiency, stray-load loss and the supply frequency. The voltages to be applied for the specific values of the frequency were chosen to keep the value of the relative slip constant at 100% load torque. After performing the series of load tests, it was found that the SLL is proportional to the square of the load and the dependency between SLL and frequency for different load levels is close to linear. The comparison of the efficiency values obtained by the methods IEEE 112 B and 112 E has shown a good correlation of the results.
Author : Sade H Shafer
Publisher : Springer Science & Business Media
ISBN 13 :
Total Pages : 440 pages
Book Rating : 4.0/5 ( download)
Download or read book Masters Theses in the Pure and Applied Sciences written by Sade H Shafer and published by Springer Science & Business Media. This book was released on 1995 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cited in Sheehy, Chen, and Hurt . Volume 38 (thesis year 1993) reports a total of 13,787 thesis titles from 22 Canadian and 164 US universities. As in previous volumes, thesis titles are arranged by discipline and by university within each discipline. Any accredited university or college with a grad
Author : Shun Yeu Lung
Publisher :
ISBN 13 :
Total Pages : 190 pages
Book Rating : 4.E/5 ( download)
Download or read book A Photographic Method of Determining Performance Characteristics of a Polyphase Induction Motor written by Shun Yeu Lung and published by . This book was released on 1923 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Columbia University
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.3/5 (91 download)
Download or read book Columbia University Bulletin written by Columbia University and published by . This book was released on 1922 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hamid A. Toliyat
Publisher : CRC Press
ISBN 13 : 1420030388
Total Pages : 850 pages
Book Rating : 4.4/5 (2 download)
Download or read book Handbook of Electric Motors written by Hamid A. Toliyat and published by CRC Press. This book was released on 2018-10-03 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting current issues in electric motor design, installation, application, and performance, this second edition serves as the most authoritative and reliable guide to electric motor utilization and assessment in the commercial and industrial sectors. Covering topics ranging from motor energy and efficiency to computer-aided design and equipment selection, this reference assists professionals in all aspects of electric motor maintenance, repair, and optimization. It has been expanded by more than 40 percent to explore the most influential technologies in the field including electronic controls, superconducting generators, recent analytical tools, new computing capabilities, and special purpose motors.
Author :
Publisher :
ISBN 13 :
Total Pages : 646 pages
Book Rating : 4.F/5 ( download)
Download or read book The Electrical Engineer written by and published by . This book was released on 1894 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : American Institute of Electrical Engineers
Publisher :
ISBN 13 :
Total Pages : 1352 pages
Book Rating : 4.E/5 ( download)
Download or read book Transactions of the American Institute of Electrical Engineers written by American Institute of Electrical Engineers and published by . This book was released on 1926 with total page 1352 pages. Available in PDF, EPUB and Kindle. Book excerpt: List of members in v. 7-15, 17, 19-20.
Author :
Publisher :
ISBN 13 :
Total Pages : 1334 pages
Book Rating : 4.1/5 (18 download)
Download or read book Engineering and Mining Journal written by and published by . This book was released on 1911 with total page 1334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Henry M. Hobart
Publisher :
ISBN 13 : 9781330618110
Total Pages : 280 pages
Book Rating : 4.6/5 (181 download)
Download or read book Design of Polyphase Generators and Motors (Classic Reprint) written by Henry M. Hobart and published by . This book was released on 2015-09-27 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Design of Polyphase Generators and Motors During several recent years the author has given courses of lectures at three technical schools in London, on the subject of the design of electric machinery. These three schools were: the Northampton Institute of Technology; Faraday House; and University College. Various methods of procedure were employed and these ultimately developed into a general plan which (so far as it related to the subjects of Polyphase Generators and Polyphase Motors), has been followed in the present treatise. It was the author's experience that the students attending his lectures took an earnest interest in calculating designs of their own, in parallel with the working out of the typical design selected by the author for the purpose of his lectures. At the outset of the course, each member of the class was assigned the task of working out a design for a stipulated rated output, speed and pressure. Collectively, the designs undertaken by the class, constituted a series of machines, and co-operation was encouraged with a view to obtaining, at the conclusion of the course of lectures, a set of consistent designs. If a student encountered difficulty or doubt concerning some feature of his design, he was encouraged to compare notes with the students engaged in designing machines of the next larger and smaller ratings or the next higher and lower speeds. Ultimately the results for the entire group of designs were incorporated in a set of tables of which each student obtained blue prints. At two of these colleges, the "sandwich" system was in operation, that is to say, terms of attendance at the college were "sandwiched" with terms during which the student was employed in an electrical engineering works. 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.
Author : William Suddards Franklin
Publisher :
ISBN 13 :
Total Pages : 536 pages
Book Rating : 4.:/5 (31 download)
Download or read book Fundamentals of Electrical Engineering (theory and Practice) written by William Suddards Franklin and published by . This book was released on 1929 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hsi-fan Yang
Publisher :
ISBN 13 :
Total Pages : 96 pages
Book Rating : 4.:/5 (319 download)
Download or read book A Study of the Performance of Polyphase Induction Motor by the Method of Symmetrical Components written by Hsi-fan Yang and published by . This book was released on 1950 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 1298 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Electrical Journal written by and published by . This book was released on 1908 with total page 1298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
