Every once in a while we find a “gem" of a book - one every elevator contractor needs. Such is Electric Motor Repair, one of the most comprehensive books on the subject we have ever encountered.
It is uniquely divided into two parts, with all the illustrations ring-bound on the left and all the text ring-bound on the right. There are 426 pages of illustrationsand 349 pages of text, including a comprehensive index and study questions.The book is a reference as well as a teaching text.
The coverage is extensive; for example, on page 120 it describes howto identify the nine leads of an untagged three-phase, dual voltage, wye-connectedmotor. Pages 178-185 describe troubleshooting DC motors.
Other sections describe rewinding both AC and DC machines, commutatorrepair, various contactors, ladder diagrams, etc.
You name it and we are certain it can be found. The book covers the rangefrom small to large motors, both AC and DC. It also includes starting andrunning circuits, both using relays and solid-state devices. It has introductionson how to rewind motors, but more importantly, if you really need a rewind.It even tells you how to fix a clock motor sorry, nothing on modeltrain motors.
CONTENTS
1 CAPACITOR MOTORS
Main Parts of Capacitor Motors - Operation of Split-Phase and Capacitor-Start Motors - Procedure for Analyzing Motor Troubles - Rewinding the Capacitor-Start Motor - Terminal Markings for Single-Phase Motors - Schematic Diagrams of Capacitor-Start Motors - How to Recognize a Connection Insulation Temperature - Forming Slot Liners - Rewinding - Making Connections - Motor Overload Protective Devices - Schematic Diagrams of Capacitor-Start Motors - Connections of Capacitor-Start Motors - Rewinding the Two-Voltage Capacitor-Start Motor - Permanent-Split Capacitor Motors - Two-Value Capacitor-Start Motor Start-Winding Connections - Calculations for Rewinding and Reconnecting - Capacitor Failure - The Right-sized Capacitor - Formulas for Finding Capacitor Values - Troubleshooting and Repair
2 REPULSION-TYPE MOTORS
Construction - The Repulsion-Start Induction Motor - The Repulsion Motor - The Repulsion-lnduction Motor Electrically Reversible Repulsion Motors - Rewinding and Reconnecting Repulsion Motors - Troubleshooting and Repair
3 THREE-PHASE MOTORS
Varieties of Three-Phase Motors - Rewinding Three-Phase Motors - Nameplates for Dual-Voltage, Three-Phase Motors - Recording Other Data - Connecting Three-Phase, Lap-wound Motors - Three-Phase Concentric Windings - Part-Winding-Start Motors - Identifying the Nine Leads of Untagged Three-Phase, Dual-Voltage, Wye-connected Motors - Odd-Pole Grouping - Rewinding and Reconnecting Three-Phase Motors - Changing Concentric Windings to Lap Windings - Troubleshooting and Repair
4 ALTERNATING-CURRENT MOTOR CONTROL
Wiring Diagrams and Line Diagrams - Starters - Troubleshooting and Repair - Testing Component Circuits
5 DIRECT-CURRENT ARMATURE WINDING
Typical Winding for a Small Armature - Lap Windings Wave Windings - Rewinding Procedure - Troubleshooting and Repair
6 DIRECT-CURRENT MOTORS
Construction - Types of DC Motors - Operation of DC Motors - Generating Factors - Counter Electromotive Force - Construction of the Field Coils - Connecting DC Motors - Reversing DC Motors - Troubleshooting and Repair
7 DIRECT-CURRENT MOTOR CONTROL
Manual Controllers - Reduced-Voltage Starters - Troubleshooting and Repair
8 UNIVERSAL, SHADED-POLE, AND FAN MOTORS
Universal Motors - Shaded-Pole Motors - Fan Motors: Speed Control
9 DIRECT CURRENT GENERATORS; SYNCHRONOUS MOTORS AND GENERATORS; SYNCHROS; AND THREE-PHASE WOUND- ROTOR INDUCTION MOTORS
Direct-Current Generators - Synchronous Motors and Generators; Synchros - Synchros - Three-Phase Wound Rotor Induction Motor
10 SOLlD-STATE MOTOR CONTROL
Semiconductor Materials - Atomic Structure - Properties of Doped Semiconductors - P-N Junction (Diode) - Diode Applications - Transistors - The Silicon controlled Rectifier - The Triac - Triggering the SCR and the Triac Solid-State Phase Control - Phase Control of Motor Speed Universal Series Motor Control - Shunt or P-M Field Motor Control - Induction Motor Controls - SCR Protection Using Transistors in Motor-Control Circuits - Solid State Switching - Three Phase Drives - Chopper Drives - Inverters - Cycloconverters - Microprocessor-controlled Motor Drives - The Stepper Motor - Servo Systems
APPENDIX
STUDY QUESTIONS
INDEX
