Self Bearing Motor Design And Control PDF Download
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Author | : Mohammad Imani Nejad |
Publisher | : |
Total Pages | : 268 |
Release | : 2013 |
Genre | : |
ISBN | : |
Download Self-bearing Motor Design and Control Book in PDF, ePub and Kindle
This thesis presents the design, implementation and control of a new class of self-bearing motors. The primary thesis contributions include the design and experimental demonstration of hysteresis self-bearing motors, novel segmented stator structures, MIMO loop shaping control algorithm for levitation and commutation, hysteresis motor analysis including frequency dependency, nonlinear hysteresis model including loop widening, and a novel single-axis self-bearing motor, as well as a zero power configuration for this type of motor. In the late 1980s, the basic concepts of self-bearing motors was proposed. Since then, different types of AC and DC electric machines have been studied as a self-bearing motor. The self-bearing system is a key technology for high efficiency and compact systems with integrated magnetic levitation for high speed and high precision applications. One of the major disadvantages of existing self-bearing motors for high speed application is their rotor mechanical construction. Either the permanent magnet or induction machines rotor has mechanical features that introduces stress concentrations. Permanent magnets have very low mechanical strength and need to be inserted into the rotor. The assembly of magnets makes rotor vulnerable to mechanical failure at high speed. On the other hand, induction motors use soft steel to reduce hysteresis loss. Their rotors are slotted to either carry wires or in case of squirrel cages, having aluminum or copper bars. As a promising alternative, this thesis demonstrates hysteresis self-bearing motors which have a simple construction with a solid and smooth rotor. This is a very important characteristic for some applications. This type of system can also be used as a magnetic bearing that can apply a finite amount of torque. The rotor doesn't have to be laminated and can be made from high strength steel. We designed, built and tested this type of self-bearing motor successfully. In this thesis we also introduced a new type of segmented stator for hysteresis machines. The major advantages of this stator are: easy and low cost manufacturing, higher filling factor and higher motor efficiency. We tested the self-bearing concept successfully with this new configuration. We have also introduced a novel single axis self-bearing motor that is very suitable for rotors with large length to diameter aspect ratio, such as high speed flywheels for energy storage. We implemented a zero power levitation condition along with passive damping for this system that has several advantages for high speed systems. One of the major advantages of zero power systems is the simple and robust touch down bearing design which is a key element for active magnetic bearings and self-bearing motors. This is mainly because the bearings experience minimal load in case of power failure. Hysteresis is a time-rate dependent phenomena which is fundamentally related to eddy current formation in the material and the thermal agitation. Hysteresis loops of materials with large hysteresis are highly frequency dependent. Therefore we added hysteresis frequency dependency to hysteresis motor analysis, which is believed to be a novel contribution . We have also developed linear and nonlinear analyses for the stabilizing forces and moments for hysteresis self-bearing motor. The nonlinear analysis is based on Chua's nonlinear hysteresis model that includes loop widening. The theoretical results were verified by experimental data for three different type motor configurations with good accuracy. Finally, we built two identical induction machines except for the rotor material. One rotor is a commercial squirrel cage and the other one is a simple solid rotor made out of hysteresis material(D2 steel). We ran the IEEE standard tests for these motors and compared their performance under different circumstances.
Author | : Hooi-Mei Chin |
Publisher | : |
Total Pages | : 246 |
Release | : 2003 |
Genre | : |
ISBN | : |
Download Controller Design Issues and Performance of the Lorentz Self-bearing Motor Book in PDF, ePub and Kindle
Author | : Gerhard Schweitzer |
Publisher | : Springer Science & Business Media |
Total Pages | : 541 |
Release | : 2009-06-10 |
Genre | : Technology & Engineering |
ISBN | : 3642004970 |
Download Magnetic Bearings Book in PDF, ePub and Kindle
Compiling the expertise of nine pioneers of the field, Magnetic Bearings - Theory, Design, and Application to Rotating Machinery offers an encyclopedic study of this rapidly emerging field with a balanced blend of commercial and academic perspectives. Every element of the technology is examined in detail, beginning at the component level and proceeding through a thorough exposition of the design and performance of these systems. The book is organized in a logical fashion, starting with an overview of the technology and a survey of the range of applications. A background chapter then explains the central concepts of active magnetic bearings while avoiding a morass of technical details. From here, the reader continues to a meticulous, state-of-the-art exposition of the component technologies and the manner in which they are assembled to form the AMB/rotor system. These system models and performance objectives are then tied together through extensive discussions of control methods for both rigid and flexible rotors, including consideration of the problem of system dynamics identification. Supporting this, the issues of system reliability and fault management are discussed from several useful and complementary perspectives. At the end of the book, numerous special concepts and systems, including micro-scale bearings, self-bearing motors, and self-sensing bearings, are put forth as promising directions for new research and development. Newcomers to the field will find the material highly accessible while veteran practitioners will be impressed by the level of technical detail that emerges from a combination of sophisticated analysis and insights gleaned from many collective years of practical experience. An exhaustive, self-contained text on active magnetic bearing technology, this book should be a core reference for anyone seeking to understand or develop systems using magnetic bearings.
Author | : Barrett Alan Steele |
Publisher | : |
Total Pages | : 182 |
Release | : 2002 |
Genre | : |
ISBN | : |
Download Design of a Lorentz, Slotless Self-bearing Motor for Space Applications Book in PDF, ePub and Kindle
Author | : Andrew L. Mular |
Publisher | : SME |
Total Pages | : 1200 |
Release | : 2002 |
Genre | : Computers |
ISBN | : 9780873352239 |
Download Mineral Processing Plant Design, Practice, and Control Book in PDF, ePub and Kindle
Annotation Based on 138 proceedings papers from October 2002, this broad reference will become the new standard text for colleges and will become a must for engineers, consultants, suppliers, manufacturers.
Author | : Rajiv Tiwari |
Publisher | : CRC Press |
Total Pages | : 1225 |
Release | : 2017-11-22 |
Genre | : Science |
ISBN | : 1351863630 |
Download Rotor Systems Book in PDF, ePub and Kindle
The purpose of this book is to give a basic understanding of rotor dynamics phenomena with the help of simple rotor models and subsequently, the modern analysis methods for real life rotor systems. This background will be helpful in the identification of rotor-bearing system parameters and its use in futuristic model-based condition monitoring and, fault diagnostics and prognostics. The book starts with introductory material for finite element methods and moves to linear and non-linear vibrations, continuous systems, vibration measurement techniques, signal processing and error analysis, general identification techniques in engineering systems, and MATLAB analysis of simple rotors. Key Features: • Covers both transfer matrix methods (TMM) and finite element methods (FEM) • Discusses transverse and torsional vibrations • Includes worked examples with simplicity of mathematical background and a modern numerical method approach • Explores the concepts of instability analysis and dynamic balancing • Provides a basic understanding of rotor dynamics phenomena with the help of simple rotor models including modern analysis methods for real life rotor systems.
Author | : Shaun D. Gregory |
Publisher | : Academic Press |
Total Pages | : 854 |
Release | : 2017-09-19 |
Genre | : Technology & Engineering |
ISBN | : 0128104929 |
Download Mechanical Circulatory and Respiratory Support Book in PDF, ePub and Kindle
Mechanical Circulatory and Respiratory Support is a comprehensive overview of the past, present and future development of mechanical circulatory and respiratory support devices. Content from over 60 internationally-renowned experts focusses on the entire life-cycle of mechanical circulatory and respiratory support – from the descent into heart and lung failure, alternative medical management, device options, device design, implantation techniques, complications and medical management of the supported patient, patient-device interactions, cost effectiveness, route to market and a view to the future. This book is written as a useful resource for biomedical engineers and clinicians who are designing new mechanical circulatory or respiratory support devices, while also providing a comprehensive guide of the entire field for those who are already familiar with some areas and want to learn more. Reviews of the most cutting-edge research are provided throughout each chapter, along with guides on how to design new devices and which areas require specific focus for future research and development. Covers a variety of disciplines, from anatomy of organs and evolution of cardiovascular devices, to their clinical applications and the manufacturing and marketing of devices Provides engineering and clinical perspectives to assist readers in the design of a market appropriate device Discusses history, design, usage, and development of mechanical circulatory and respiratory support systems
Author | : |
Publisher | : |
Total Pages | : 144 |
Release | : 1983 |
Genre | : |
ISBN | : |
Download Komplex 9 [neun] K 33 [dreiunddreißig] M 2 [zwei], Transportladefahrzeug 9 [neun] T 217 [zweihundertsiebzehn] BM 2 [zwei], Beschreibung und Nutzung Book in PDF, ePub and Kindle
Author | : Wei Tong |
Publisher | : CRC Press |
Total Pages | : 987 |
Release | : 2022-05-19 |
Genre | : Technology & Engineering |
ISBN | : 1000555046 |
Download Mechanical Design and Manufacturing of Electric Motors Book in PDF, ePub and Kindle
1. Focuses on practical design and manufacturing process 2. Contains Industrial working experiences 3. Includes innovations in development of electric machines 4. Includes read-to-implement solutions in electric machine design 5. Discusses state-of-the-art technology in modern electric machine design
Author | : Wei Tong |
Publisher | : CRC Press |
Total Pages | : 736 |
Release | : 2014-04-28 |
Genre | : Technology & Engineering |
ISBN | : 1420091441 |
Download Mechanical Design of Electric Motors Book in PDF, ePub and Kindle
Rapid increases in energy consumption and emphasis on environmental protection have posed challenges for the motor industry, as has the design and manufacture of highly efficient, reliable, cost-effective, energy-saving, quiet, precisely controlled, and long-lasting electric motors.Suitable for motor designers, engineers, and manufacturers, as well