Cover image for Electric motor maintenance and troubleshooting
Electric motor maintenance and troubleshooting
Hand, August.
Personal Author:
Publication Information:
New York : McGraw-Hill, [2002]

Physical Description:
ix, 429 pages : illustrations ; 24 cm
General Note:
Includes index.
Format :


Call Number
Material Type
Home Location
Item Holds
TK2514 .H256 2002 Adult Non-Fiction Non-Fiction Area

On Order



For those who are involved in keeping an electric motor operational and running efficiently, this book helps them decide whether to repair in place or remove a motor for repair when it breaks down. Effective motor maintenance and troubleshooting requires a complete understanding of how a motor works internally. This book provides an overview of each motor type, its components and operation, and then gives several troubleshooting procedures for determining the problem. Troubleshooting examples make the concepts clear and reveiw questions at the end of each chapter drive the concepts home.

Table of Contents

Chapter 1 The DC Machine
Basic Electricity as It Applies to Motors
Magnets and the Magnetic Circuits
Ampere Turns
Circuits of the DC Machine
Rules for Generating DC
The Shunt Generator
The Series Generator
The Compound Generator
The DC Arc Welder
Operation of a DC Motor
The Shunt Motor
The Permanent Magnet DC Motor
The Series Motor
The Compound DC Motor
The Armature and Interpoles
The Stabilized Shunt Motor
Speed Control for a Compound DC Motor
Armature Components
Armature Problems
Brush Problems
Neutral Location inthe Stator Armature
Field Testing of the DC Machine
Locating Problems in the DC Machine
Locating Problems in the Shunt Field
Drawing Simple Schematics of a Shunt Field
Locating Problems in the Series Field
Identifying Leads of a Component DC Motor with an Ohmmeter
Chapter 2 AC Electric Motor Theory
Basic Terminology
Inductive Reactance
Capacitance and Capacitive Reactance
Oil-Filled Capacitors
Electrolytic Capacitors
Capacitor Test Formula
The Squirrel Cage Rotor
Chapter 3 The Single-Phase Motor
Shaded-Pole Motor
Split-Phase Motor
Capacitor Motors
Chapter 4 Three-Phase Induction Motor
Components of the Three-Phase Motor
Operation of the Three-Phase Motor
Amperes and Rotor Bar Design
Introduction to Three-Phase Motor Types
Multispeed Motors
Multimode Nine-Lead Three-Phase Motors
Identifying the Triple-Mode, Nine-Lead Three-Phase Motor
Synchronous Motor
Identifying the Three-Phase Induction Motor
Chapter 5 Troubleshooting Three-Phase Motors
Dual-Voltage, Nine-Lead Motor's Internal Connections
Identifying Unmarked Leads in a Nine-Lead Three-Phase Motor
Typical Winding Problems
When Motors Overheat
Troubleshooting Less Common Motors
Troubleshooting the Synchronous Motor
Troubleshooting the Two-Speed One-Winding Motor
Troubleshooting Multispeed Multiwinding Motors
Testing Motors in Place
Locating Motor Faults
Bearing Maintenance
Sleeve Bearings
Chapter 6 Test Instruments and Services
Instruments for Initial Testing
Instruments for In-Depth Testing and Scheduled Maintenance
Study Questions