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Author: Scott Davis Publisher: ISBN: Category : Engineering Languages : en Pages :
Book Description
"The single-phase induction motor (SIM) is one of the most common types of rotating machinery available due to the single-phase AC nature of commercial and residential power supplies. A major problem associated with this type of machine is that, unlike three-phase induction machines, no starting torque is provided by the magnetic flux rotating inside the machine. Many methods have been devised to overcome this problem, most of which revolve around changing the phase difference between the main and auxiliary phase windings. The windings in a SIM are the components that enable the motor to rotate, in that the current flowing through them creates a force, and this force turns the rotor. The phase difference between the main winding and the auxiliary winding creates a rotating stator flux, which in turn induces a torque in the rotor. Present methods have the problems of either inefficient running characteristics, starting characteristics, or expensive switching gear. The switching gear is used to disconnect the auxiliary phase once the motor is running. Certain motors have better characteristics than others, but the cost involved in obtaining a machine with good characteristics in all of the problem areas is relatively large. " -- Abstract/Synopsis.
Author: Scott Davis Publisher: ISBN: Category : Engineering Languages : en Pages :
Book Description
"The single-phase induction motor (SIM) is one of the most common types of rotating machinery available due to the single-phase AC nature of commercial and residential power supplies. A major problem associated with this type of machine is that, unlike three-phase induction machines, no starting torque is provided by the magnetic flux rotating inside the machine. Many methods have been devised to overcome this problem, most of which revolve around changing the phase difference between the main and auxiliary phase windings. The windings in a SIM are the components that enable the motor to rotate, in that the current flowing through them creates a force, and this force turns the rotor. The phase difference between the main winding and the auxiliary winding creates a rotating stator flux, which in turn induces a torque in the rotor. Present methods have the problems of either inefficient running characteristics, starting characteristics, or expensive switching gear. The switching gear is used to disconnect the auxiliary phase once the motor is running. Certain motors have better characteristics than others, but the cost involved in obtaining a machine with good characteristics in all of the problem areas is relatively large. " -- Abstract/Synopsis.
Author: Bahram Amin Publisher: Springer Science & Business Media ISBN: 9783540423744 Category : Technology & Engineering Languages : en Pages : 284
Book Description
This book provides a thorough approach for mastering the behavior and operation of induction motors, an essential device in the modern industrial world. Its way of presentation renders this book suitable for selfteaching by students, engineers, and researchers in the field of electrical engineering. It covers the modern theory of induction motor applications and control methods. The transient analysis of both three-phase and single-phase induction motors as well as that of the double-cage motors are developed. The principles of such modern control methods as Fiel-Oriented Control, Direct Torque Control and Computed Charges Acceleration Method are clearly treated in this monograph. Numerous equations, simulations, and figures are presented.
Author: Wenzhong Ma Publisher: John Wiley & Sons ISBN: 1118981030 Category : Science Languages : en Pages : 136
Book Description
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: John C. Andreas Publisher: CRC Press ISBN: 9780824785963 Category : Technology & Engineering Languages : en Pages : 306
Book Description
Revised and updated throughout, the second edition of Energy-Efficient Electric Motors provides guidelines for picking and using electric motors on an energy conservation and life-cycle cost basis - emphasizing both single- and three-phase motors in the 1- to 200-hp range that offer maximum opportunities for energy savings.;Maintaining the features of the first edition, this concise resource: explains current improvements in electric motor capabilities and recently adopted NEMA energy-efficient motor standards; contains a new section about the power factor with nonlinear loads; covers the performance of polyphase induction motors supplied by adjustable frequency power supplies for several types of loads, presents information on numerous kinds of power semiconductors used in variable-frequency power supply systems; provides expanded coverage comparing various types of adjustable speed drives when applied to constant torque and variable torque loads; and contains a new summary checklist criteria for selecting induction motors for adjustable frequency drive systems.;Generously illustrated with nearly 200 figures and tables, the second edition of Energy-Efficient Electric Motors is timely reading for electrical, electronics, mechanical, consulting, specifying, and plant engineers; plant and purchasing managers; original equipment, heating, ventilating, and air-conditioning manufacturers; and continuing-education courses in these disciplines.
Author: Andrzej M. Trzynadlowski Publisher: Springer Science & Business Media ISBN: 1461527309 Category : Technology & Engineering Languages : en Pages : 269
Book Description
The Field Orientation Principle was fIrst formulated by Haase, in 1968, and Blaschke, in 1970. At that time, their ideas seemed impractical because of the insufficient means of implementation. However, in the early eighties, technological advances in static power converters and microprocessor-based control systems made the high-performance a. c. drive systems fully feasible. Since then, hundreds of papers dealing with various aspects of the Field Orientation Principle have appeared every year in the technical literature, and numerous commercial high-performance a. c. drives based on this principle have been developed. The term "vector control" is often used with regard to these systems. Today, it seems certain that almost all d. c. industrial drives will be ousted in the foreseeable future, to be, in major part, superseded by a. c. drive systems with vector controlled induction motors. This transition has already been taking place in industries of developed countries. Vector controlled a. c. drives have been proven capable of even better dynamic performance than d. c. drive systems, because of higher allowable speeds and shorter time constants of a. c. motors. It should be mentioned that the Field Orientation Principle can be used in control not only of induction (asynchronous) motors, but of all kinds of synchronous motors as well. Vector controlled drive systems with the so called brushless d. c. motors have found many applications in high performance drive systems, such as machine tools and industrial robots.
Author: Ion Boldea Publisher: CRC Press ISBN: 1420042653 Category : Technology & Engineering Languages : en Pages : 965
Book Description
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: Raúl Gregor Publisher: BoD – Books on Demand ISBN: 953512207X Category : Science Languages : en Pages : 394
Book Description
AC motors play a major role in modern industrial applications. Squirrel-cage induction motors (SCIMs) are probably the most frequently used when compared to other AC motors because of their low cost, ruggedness, and low maintenance. The material presented in this book is organized into four sections, covering the applications and structural properties of induction motors (IMs), fault detection and diagnostics, control strategies, and the more recently developed topology based on the multiphase (more than three phases) induction motors. This material should be of specific interest to engineers and researchers who are engaged in the modeling, design, and implementation of control algorithms applied to induction motors and, more generally, to readers broadly interested in nonlinear control, health condition monitoring, and fault diagnosis.
Author: Scott Davis
Author: Scott Davis
Author: Bahram Amin
Author: Wenzhong Ma
Author: Shedrach Samuel Nwafor Okeke
Author: D. E. Cattermole
Author: John C. Andreas
Author: Edward Randolph Collins (Jr.)
Author: Andrzej M. Trzynadlowski
Author: Ion Boldea
Author: Raúl Gregor