ข้อมูลทรัพยากร

เนื้อหาย่อ : In the Years since the first edition of Electric Machinery Fundamentals was blished, there has been rapid advance in the development of largera sophisticated solid-state motor drive packages. The first edition of this book stated dc motors were the method of choice for demanding variable-speed appli ns. That statement is no longer true today. Now, the system of choice for s control applications is most often an ac induction motor with a solid-state motor drive. DC motors have been largely relegated to special-purpose applications re a de power source is readily available, such as in automotive systems. The third edition of the book was extensively restructured to reflect these anges. The material on ac motors and generators is now covered in ugh 7, before the material on de machines. In addition, the de machi erage was reduced compared to earlier editions. The fourth edition continues with this same basic structure. hapter 1 provides an introduction to basic machinery concepts, des by applying those concepts to a linear de machine, which is the sin possible example of a machine. Chapter 2 covers transformers, and Chapter 3 is uction to solid-state power electronic circuits. The material in Chap is optional, but it supports ac and dc motor control discussions in Chapters 7, 9, and 10. After Chapter 3, an instructor may choose to teach either dc or ac machin- ery first. Chapters 4 through 9 cover ac machinery, and Chapters 8 and 9 cover dc hinery. These chapter sequences have been made completely independer each other, so that instructors can cover the material in the order that best suits their needs. For example, a one-semester course with a primary concentration in achinery might consist of parts of Chapters 1 to 7, with any remai voted to dc machinery. A one-semester course with a primary conce inery might consist of parts of Chapters 1, 3, 8, and 9, with any re g time devoted to ac machinery. Chapter 10 is devoted to single-I special-purpose motors, such as universal motors, stepper motors, brushless dc motors, and shaded-pole motors.