Electrical Control for Machines, 7th Edition

  • Diane Lobsiger Delta College
  • ISBN-10: 1133693385  |  ISBN-13: 9781133693383
  • 576 Pages
  • Previous Editions: 2004, 1997, 1992
  • © 2016 | Published
  • List Price = $ 127.95
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Reflecting the latest trends and practices from industry, the cutting-edge new ELECTRICAL CONTROLS FOR MACHINES, 7e delivers a thorough introduction to the range of technologies found in today's electrical machine controls. Completely up to date, circuit diagrams and the descriptions of the circuits illustrate a modern representation of the controls circuits. The text also offers expansive coverage of the power and control circuitry required to operate electrical machinery. While it discusses the trend away from relay control to PLC control, the text maintains solid coverage of relay circuits. Its emphasis on the critical importance of worker and equipment safety in industrial settings includes a detailed explanation of the risk assessment process and a safety relay circuit. In addition, the inclusion of international equipment specifications reflects the dramatic impact of globalization and integration of businesses on the way industries function.

Features and Benefits

  • Delivering coverage that is both comprehensive and current, ELECTRICAL CONTROL FOR MACHINES emphasizes modern control systems that contain mature technologies, expanding technologies, and new technologies.
  • Extremely reader friendly, the text presents information in a logical and systematic sequence that facilitates learning, taking readers from basic principles to advanced applications while limiting the jargon to terms widely accepted by control manufacturers and equipment users.
  • System design issues and troubleshooting techniques are applied to real-world applications that reflect the range of technologies found in today's industrial systems.
  • Highly practical and realistic examples feature the use of common equipment and procedures, enabling readers to readily apply what they have learned to solve real-world problems.
  • Concise text explanations, insightful diagrams, and engaging photographs make it easy to read, understand, and learn from the book.
  • End-of-chapter review questions underscore key points while a comprehensive glossary helps readers understand and master key terms.
  • Quick reference appendices offer instant access to frequently used electrical symbols, measurement units, rules of thumb, electrical formulas, electrical codes and standards, power factor corrections, and more.
  • Recommended web sites at the end of each chapter link readers with additional information, manufacturers, and professional organizations.

Table of Contents

Control Transformers. Transformer Regulation. Sizing a Transformer. Operating Transformers in Parallel. Temperature Rise in a Transformer. 60 Hz Versus 50 Hz Operation. Constant Voltage Regulators. Power Supplies for Control Voltage. Uninterruptible Power Systems. Circuit Diagram. Insulation Classifications. Conductor Ampacity. Conductor Color Code.
Protective Factors. Fuse Construction and Operation. Fuse Types. Peak Let-Thru Current (IP) and Ampere Squared Seconds (I2t). Voltage and Frequency Surges. Circuit Breaker Types. Programmable Motor Protection. Electrical Metering and Voltage Protection. Selecting Protective Devices. Ground Fault Circuit Interrupter.
Oil-Tight Units. Push-Button Switches. Selector Switches. Heavy-Duty Switches. Indicating Lights. General Information on Oil-Tight Units. Circuit Applications. Annunciators. Light-Emitting Diodes. Membrane Switches.
Control Relays and Their Uses. Timing Relays. Latching Relays. Plug-In Relays. Contactors.
Solenoid Action. Solenoid Force and Voltage. Low Voltage. Overvoltage. AC Solenoids on DC. DC Solenoids on AC. 50- and 60-Cycle Solenoids. Solenoid Temperature Rise. Valve Operation. Circuit Applications. Variable Solenoids. Proportional Valves. Servo Valves.
Open-Loop Control. Closed-Loop Control. Proportional Control. Proportional-Integral. Proportional-Integral-Derivative.
Importance of Position Indication and Control. Limit Switches-Mechanical. Limit Switch Symbols. Circuit Applications. Proximity Limit Switches. LED Indicators. Solid-State Outputs. Detection Range. Hysteresis. Attenuation Range. Speed. Magnet-Operated Limit Switch. Vane Switches. Linear Position Displacement Transducers. Angular Position Displacement Transducers. Use of AC Synchronous and DC Stepping Motors. Servo Positioning Control. Sensing Theory. Flow Sensors.
Importance of Pressure Indication and Control. Types of Pressure Switches. Circuit Applications.
Importance of Temperature Indication and Control. Selection of Temperature Controllers. Electronic Temperature Controller (Pyrometer). Controller Outputs. Additional Terms. Temperature Switches (Thermostats). Temperature Sensors. Circuit Applications.
Selected Operations. Types of Timers. Synchronous Motor-Driven Timers. Solid-State Timers. Circuit Applications.
Electromechanical Control Counter. Circuit Applications. Solid-State Counters.
Placement of Components in a Control Circuit. Control Circuit Examples.
DC Motors-Principles of Operation. DC Motors. AC Motors-Theory of Operation. Polyphase Squirrel-Cage Induction Motors. Variable Frequency Drives. Single-Phase Motors. Resistance Split-Phase Motors. Capacitor Start Motors. Permanent Split-Capacitor Motors. Shaded-Pole Motors. Brushless DC Motors.
Contacts and Overload Relays. Across-the-Line (Full-Voltage) Starters. Reversing Motor Starters. Multispeed Motor Starters. Additional Across-the-Line Starter Circuits. Reduced-Voltage Motor Starters. Solid-State Motor Starters. Starting Sequence.
Primary Concepts of Relay Control. Introduction to Programmable Logic Controllers. Programmable Logic Controller Concepts. PLC Input/Output (I/O). Processor. Memory. Power Supplies. Programming. Examine On/Examine Off. Programming Devices. Data Communications. Converting from Relay Logic to PLC.
Overview. Industrial Information Technology Architecture. Data Communication Network Concepts. Data Transmission. Industrial Data Highway. Network Topologies. Industrial Networks. Data Transfer Rate. Ethernet and the Information Highway. Transmission Media. Troubleshooting Networks. Open Systems Versus Proprietary Systems. Network Layers. Typical Network Systems.
Defining Quality and Quality Control. Electrical and Electronic Circuits Used in Quality Control. Quality Achieved Through Machine and Process Monitoring. Process Tolerance (Standards). Information Systems. Maintaining Quality.
Worker Safety. Machine Safety. Diagnostic Systems. Machine Safety Circuit. Programmable Controllers in Safety. Other Safety Conditions.
Safety First. Analyzing the Problem. Major Trouble Spots. Equipment for Troubleshooting. Motors. Troubleshooting a Complete Control Circuit. Troubleshooting the Programmable Logic Controller. Electronic Troubleshooting Hints.
Design Considerations. Diagrams and Layouts. Locating, Assembling, and Installing Components.

What's New

  • Expanding on the power and control circuitry required to operate electrical machinery, the Seventh Edition describes the bus system and the use of bus plugs as a means of power distribution throughout a factory. Included transformer calculations and the sizing of transformers helps technicians understand what values to expect (voltage and current) when troubleshooting equipment. Explanations of insulation classifications, conductor ampacity, and conductor color code help readers identify and select proper wiring for a given application. The text also covers the trend toward 24 VDC as the standard control voltage for equipment.
  • While the text discusses the trend away from relay control to PLC control and the advantages to using PLCs to control machinery, it still offers thorough coverage of relay circuits to provide basic understanding of control circuits along with knowledge that may be easily transferred to an understanding of PLC circuits. Expanded coverage and clarification is now included on such key concepts as PLC scan, addressing schemes, power supply functions, memory, I/O status, and peripheral devices. The use of Ethernet as a common protocol for control systems is also highlighted.
  • New explanations of variable frequency drives are also included. As the cost of electrical components decline, the use of drives to control motors is continually becoming more affordable.
  • New coverage of the normal state for switching devices helps readers gain a thorough understanding of this concept--which is required to understand circuit diagrams and the proper operation of the devices.
  • An introduction to fail-safe designs illustrates how this practice is critical to the proper functionality of safety circuits, quality control systems, and processes by ensuring the integrity of switching devices.
  • New explanations of the risk assessment process and a safety relay circuit emphasizes the importance of understanding the need for safety rated devices and how they are integrated into a circuit so that unintentional changes to a safety circuit are not made. Coverage of Ground Fault Circuit Interrupters (GFCIs) is also included.
  • Reflecting the impact of globalization, the Seventh Edition expands chapter material to include international equipment specifications. Companies purchase equipment from other regions as well as relocate existing machinery to other parts of the world to meet changing demand. The text covers concerns related to relocating equipment to various regions of the world. In addition, IEC617 symbols are included whenever a new device symbol is discussed.
  • Questions have been added to the end of relevant chapters to include the conversion of circuits using JIC symbols to the equivalent circuits using IEC617 symbols.
  • Anyone troubleshooting equipment needs a solid understanding of the control circuit diagrams--and the Seventh Edition delivers by providing thorough coverage of how the circuit is supposed to function and what to expect when working on the system. The new edition adds many modifications, including various cross-referencing schemes, parts lists, wiring methodology, and push-button layouts. Some older material is maintained to provide a comprehensive understanding of basic circuits as well as to help technicians who will need to troubleshoot these devices on older equipment.
  • Additional end-of-chapter questions are included to enhance student comprehension of text material. The recommended web links at the end of every chapter have also been updated.


All supplements have been updated in coordination with the main title. Select the main title's "About" tab, then select "What's New" for updates specific to title's edition.

For more information about these supplements, or to obtain them, contact your Learning Consultant.

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Student Supplements

Lab Manual  (ISBN-10: 1285169050 | ISBN-13: 9781285169057)

The Laboratory Manual is a valuable tool designed to enhance your lab experience. Lab activities, objectives, materials lists, step-by-step procedures, illustrations, and review questions are commonly found in a Lab Manual.

List Price = $40.95  | CengageBrain Price = $40.95  | College Bookstore Wholesale Price = $30.75

Meet the Author

Author Bio

Diane Lobsiger

Diane Lobsiger is an electrical instructor at Delta College in University Center, Michigan. She instructs students in the Skilled Trades-Electrician program, Wind Turbine Technology program, and Pre-Engineering program. In her prior work as a senior manufacturing controls engineer for 24 years, she gained a wealth of knowledge and extensive experience in the design, troubleshooting, specification writing, and approval of machine controls systems. Her expertise includes relay control systems, programmable logic controllers, human-machine interfaces, servo systems, adjustable frequency drives, and fluid power systems. She earned a Bachelor of Science in electrical engineering from Auburn University and a Master of Science in electrical engineering from Michigan State University. She recently obtained her Secondary Teaching Certification in mathematics and physics from Saginaw Valley State University. In her free time, she can usually be found fishing at her cabin.