Electric Motor Maintenance & Troubleshooting

"There is a definite need for this book" - Chuck Yung (technical Support Specialist, Electrical Apparatus Service, Association, Inc.)

Here’s the ideal resource for anyone who has to purchase, teach, install, troubleshoot, perform limited repairs on, or maintain industrial-size electric motors.

EVERYTHING YOU NEED TO KNOW TO KEEP ELECTRIC MOTORS RUNNING SMOOTHLY AND MINIMIZE COSTLY DOWNTIME!

Expert author Augie Hand uses clear, jargon-free language and time-saving flow charts -- minus the complicated math to help you decide whether to replace a motor, take it off line for repair, or repair it in place – decisions that can make the difference between profitability and loss.

Augie also includes an invaluable host of troubleshooting tricks and procedures gleaned from over forty years in the field to cover electric motors from top to bottom as only an insider can.

Knowing the necessity of having a complete understanding of how a motor works, the author provides a thorough overview of each motor type’s components and operation. He then goes on to offer time-tested procedures for determining and correcting any type of problem.

Troubleshooting examples make the concepts crystal-clear, and review questions at the end of each chapter reinforce the lesson. Augie also delves into crucial safety issues everyone in the field should be familiar with.

Electric Motor Maintenance & Troubleshooting reflects the author’s firm belief that every problem has an explanation and a solution.

• Gives an overview of each motor types components and operation
• Supplies troubleshooting procedures, which make concepts crystal-clear and review questions at the end of each chapter to drive the concepts home
• Covers essential safety issues

Introduction

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
Interpoles 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 in the 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 Motors 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

Index

Augie Hand has over 40 years experience in the electric motor field. He owned and operated an electric motor repair shop for 15 years and originated and taught the Electric Motor Repair course for 8 years at Southwest Vocational Technical Institute in Jackson, MN.

Mr. Hand has been presenting seminars to electric motor repair shops and large firms for over 15 years.

Softcover
428 Pages