The developments of electrical machines are due to the convergence of material progress, improved calculation tools, and new feeding sources. Among the many recent machines, the authors have chosen, in this first book, to relate the progress in slow speed machines, high speed machines, and superconducting machines. The first part of the book is dedicated to materials and an overview of magnetism, mechanic, and heat transfer.
In this book a general matrix-based approach to modeling electrical machines is promulgated. The model uses instantaneous quantities for key variables and enables the user to easily take into account associations between rotating machines and static converters (such as in variable speed drives). General equations of electromechanical energy conversion are established early in the treatment of the topic and then applied to synchronous, induction and DC machines. The primary characteristics of these machines are established for steady state behavior as well as for variable speed scenarios. Important new applications for this technology (such as wind turbines, electric propulsion systems for large ships, etc.) are addressed and the book is illustrated with a large number of informative and detailed photographs, provided by various companies at the leading edge of research and applications in the field.
David Macaulay's How Machines Work uses pop-ups and award-winning illustrations to demonstrate the technology of six simple machines. Follow the mad antics of Sloth and his side-kick Sengi as they try to break out of the zoo with the help of levers, pulleys, screws, inclined planes, wedges and wheels. Brought to life through pop-ups and pull-outs meaning you can explore six simple machines, from bicycles and cranes to hammers and drills, through interactive science. Packed with engaging, hands-on activities, David Macaulay's How Machines Work will gear kids up for scientific and engineering greatness!
Get more out of music with this essential guide Music Theory For Dummies makes music theory easy to understand, with a friendly, unintimidating overview of everything you need to know to become fluent at knocking out beats, reading musical scores, and learning to anticipate where a song should go—whether you're reading someone else's music or writing your own. Whether you're a music student or a music lover, you'll learn to read, write, and understand music with this informative guide. With expert instruction, you'll put it all together as you compose, arrange, and create original melodies, harmonies, and chords of your own, with helpful tips for performing your pieces in front of an audience. This new third edition presents the most current teaching techniques, the newest music genres and examples, and updated information on all aspects of understanding, creating, and performing music. Studies have shown that music training improves children's' verbal and spatial abilities, and it's been associated with cognitive and mathematical benefits in adults. The music job market is expected to increase over the coming years, and music theory is becoming an increasingly common part of education at all levels. Music Theory For Dummies provides the instruction you need to get more out of music than you ever thought possible. Master major and minor scales, intervals, pitches, and clefs Understand basic notation, time signals, tempo, dynamics, and navigation Employ melodies, chords, progressions, and phrases to form music Compose harmonies and accompanying melodies for voice and instruments Whether you intend to pursue a degree or career in music, or just enjoy listening to it, understanding the theory behind it gives you a whole new appreciation for the artistry and craftsmanship behind the pieces that give you goose bumps. It's a mix of technical skill, inborn talent, and plenty of practice – and now you can try your hand at it, with Music Theory For Dummies.