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Download PDF Electric Motor Control 9TH Edition Stephen L. Herman


Electric Motor Control provides beginning students with a practical approach to motor control. The textbook discusses electrical and mechanical components and how they are connected to control different types of motors. Many different types of control circuit and illustrations are discussed. The text contains a wealth of practical information that will apply to almost any industrial application.


The text assumes that students have knowledge of basic electrical theory and common series and parallel circuits. Electric Motor Control has been used successfully for both formal classroom training and self study. It is used extensively in preapprentice and indentured apprentice training programs and in organized journeyman electrician classes. The practical approach to motor control makes this a very useful handbook on the job for installing, monitoring, and maintaining control systems.


Electric Motor Control provides a very practical approach to a somewhat difficult subject. The text is written in easy-to-understand language. Each unit of instruction covers a short, concise topic. Expected student learning is outlined in the objectives at the beginning of each unit. The appendices and glossary provide further explanation of terms and servicing to troubleshooting, which the student is encouraged to use. The ninth edition contains expanded information on overload relays and numerous updated illustrations. The text
employs a second color to highlight important concepts. The ninth edition provides an update to a textbook that has long been regarded as an outstanding book on the subject of motor control theory and practical application.


Electric Motor Control illustrates control systems, starting with the simplest of equipment, and builds on it in a step-by-step fashion to more complex circuits. Students learn to draw and interpret motor control schematics and wiring diagrams. The text helps teach students to think about the process involved in drawing and reading control schematics. This approach leads students in a natural progression into the basic concepts needed to install and troubleshoot control systems.


  1. Introduction
  2. Circuit Layout, Connections, and Symbols
  3. Control Pilot Devices
  4. Basic Control Circuits
  5. AC Reduced Voltage Starters
  6. Three-Phase, Multispeed Controllers
  7. Wound Rotor (Slip Ring) Motor Controllers
  8. Synchronous Motor Controls
  9. Direct-Current Controllers
  10. Methods of Deceleration
  11. Motor Drives
  12. Troubleshooting

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