Pressure switches – Troubleshooting and repair
A pressure switch is a type of switch that operates an electrical contact when a certain set fluid pressure has been reached at its inlet. The switch can be designed to close the contact on either an increase in pressure or a decrease in pressure. Pressure switches are widely used in industry to automatically supervise and control systems that use pressurized fluids.
Another type of pressure switch detects mechanical force; for example, a pressure-sensitive mat is used to automatically open doors in commercial buildings. Such sensors are also used in security alarm applications, such as pressure sensitive floors.
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Electric Motors and Drives: Fundamentals, Types and Applications
Best-selling reference on electric motors and drives for non-specialists, bridging the gap between mathematics and theory.
Mechanical Design of Electric Motors
Rapid increases in energy consumption and emphasis on environmental protection have posed challenges to the motor industry, as has the design and production of highly efficient, reliable, economical, energy-saving, quiet, precisely controlled and durable electric motors.
Suitable for motor designers, engineers and manufacturers, as well as maintenance personnel, undergraduate and graduate students, and academic researchers, Mechanical Design of Electric Motors provides in-depth knowledge of cutting-edge design methods and developments in electric motors. From engine classification, engine component design, model configuration, material and bearing selection, power losses, engine cooling, design integration, vibration and acoustic noise, this comprehensive text covers the fundamentals, practical design and design issues, modeling and simulation, engineering analysis, manufacturing processes, test procedures and performance characteristics of today's electric motors.
With particular attention to the mechanical design of modern electric motors, the book:
Details the design and manufacturing of major components and subsystems, such as rotors, shafts, stators, and frames
Examines various cooling techniques, including forced air, liquid, and phase change
Discusses the analysis and calculation of engine power losses
Addresses engine vibration and acoustic noise issues
Presents engineering analysis methods and case study results
Emphasizes construction, optimization, and applications
With research findings from the author's personal experience and the significant contributions of others, Mechanical Design of Electric Motors highlights the innovative and advanced electric motors developed in recent decades.
Mechanical Design of Electric Motors
The importance of electric motors is well known in various engineering sectors. The book provides comprehensive coverage of various types of electric motors, including DC motors, three-phase and single-phase induction motors, synchronous motors, universal motors, AC servo motors, linear induction motors, and stepper motors. The book covers all the details of DC motors, including the torque equation, e.m.f. contrasting features, starter types, speed control methods, and applications.
The book also covers the various testing methods of DC motors, such as the Swinburne test, braking test, deceleration test, field test and Hopkinson test. The book also explains three-phase induction motors in detail. It includes rotating magnetic field production, construction, operation, effect of slip, torque equation, torque ratios, torque-slip characteristics, losses, power flow, equivalent circuit, effect of harmonics on performance, circular diagram, and applications. This chapter also includes discussion of the induction generator. The book teaches various starting methods and speed control methods of three-phase induction motors. The book incorporates the explanation of various single-phase induction motors. The chapter on synchronous motor provides a detailed discussion of construction, working principle, load behavior, phasor diagram analysis, V-curves and inverted-V curves, hunting, synchronous capacitor and applications. The book also teaches about various specialty machines, such as single-phase commutator motors, universal motors, AC servo motors, linear induction motors, and stepper motors. The book uses simple and lucid language to explain each topic. The book provides the logical method of explaining various complicated topics and step by step methods to make understanding easy. Each chapter is well supported with necessary illustrations, self-explanatory diagrams and a variety of solved problems. The book explains the philosophy of the topic which makes the understanding of the concepts very clear and makes the topic more interesting.
Motor Starting and Control Primer: An introduction to the starting techniques and control of electric motors
Whether you're a busy electrical engineer who needs to brush up on starting motors, a student in a hurry new to the subject, or an interested person with an hour to spare, this book is the place to start. Steven McFadyen shares his expert knowledge of engine starting in a clear and easily accessible manner without time-consuming verbiage or self-aggrandizing arguments. Complete with circuit diagrams and detailed explanations of the most common motor starting methods and challenges, this book is an invaluable reference guide. It has something to offer anyone who wants to learn new things, while at the same time helping practicing electrical engineers design and implement reliable and functional motor starters.
