Page 9 - Electromechanical Devices and Components Illustrated Sourcebook
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CONTENTS
LIST OF ILLUSTRATIONS xiii
PREFACE xxxi
ACKNOWLEDGMENTS xxxiii
CHAPTER 1 BASIC ELECTRICITY 1
The Electric Circuit 2
Voltage, Current, and Resistance 2
Ohm’s Law 4
Circuit Types 5
Reversing Circuits 6
Alternating Current (AC) 6
Watts 8
CHAPTER 2 BASIC MECHANICS 9
Energy 10
Simple Machines 10
The Lever 10
The Wheel 12
Pulleys 12
The Inclined Plane 13
The Screw 14
Springs 15
CHAPTER 3 POWER SOURCES 17
Direct Current (DC) 18
Alternating Current (AC) 18
Three-Phase 19
Batteries 20
Lead/Acid Batteries 20
Dry Cells 22
Battery Packs 22
Testing Batteries 24
Battery Charging 25
Battery Holders 27
Battery Terminals 28
Battery Connectors 28
Solar Cells 29
Direct Current Power Supplies 30
Selecting Power Supply Components 33
UInterruptible Power Supplies (UPS) 34
CHAPTER 4 ELECTRICAL CONTROLS 37
Manual Switches 38
Switch Actions 40
Push Buttons 41
Power Disconnects 42
Selector Switches 44
Limit Switches 48
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