8 Motor parts and common faults 

By on December 6th, 2011

Straight forward list of some common motor faults:

  1. Shaft - Imbalance, Misalignment, Wear
  2. Rotor - Imbalance, Rotor Bar Faults, Loose Rotor, Eccentricity
  3. Stator - Stator Looseness, Incorrect Air Gap, Winding Fault
  4. Motor Bearing Housing -Mechanical Looseness, Misalignment
  5. Rolling Element Bearings - Cage, Ball/Roller, Outer and Inner Race Defects Looseness within the bearing
  6. Motor Feet - Structural Looseness/Soft Foot
  7. Base-plate/Foundations - Structural Looseness, Twisted Supports
  8. Motor insulation - Insulation breakdown

 If I've missed any other common faults, please take a bit of time to add them in as a comment below.



Steven McFadyen's avatar Steven McFadyen

Steven has over twenty five years experience working on some of the largest construction projects. He has a deep technical understanding of electrical engineering and is keen to share this knowledge. About the author


comments powered by Disqus

  1. Rajeevankeeran's avatar Rajeevankeeran says:
    12/28/2011 2:38 AM

    While it may not be a major problem in Low Voltage Motors, bearing damage due to circulating currents needs special mention. With Regards and wishing all a Happy New Year.


Comments are closed for this post:
  • have a question or need help, please use our Questions Section
  • spotted an error or have additional info that you think should be in this post, feel free to Contact Us



Latest Questions:

  1. Inspection of Cathodic Protection Transformer Rectifier
  2. Per Unit & Faults
  3. relay testing
  4. UPS battery sizing
  5. VSD/ VFD/ softstarters current supply to motor
  6. On load RPM of DC series motor
  7. Motor Current Calculation
  8. Protection Settings Training Course

most popular notesMost Popular Notes:







newsletter logo

Our Newsletter

Receive updates on new posts by email
down arrow

Energy Systems Engineering: Evaluation and Implementation, Second Edition
Energy Systems Engineering: Evaluation and ...
Francis Vanek, Louis ...
Hardcover - 672 pages
$60.99
Electric Power Distribution Engineering, Third Edition
Electric Power Distribution Engineering, ...
Turan Gonen
Hardcover - 1061 pages
$137.08
Solar Electricity Handbook - 2015 Edition: A simple, practical guide to solar energy - designing and installing solar PV systems.
Solar Electricity Handbook - 2015 Edition: ...
Michael Boxwell
Paperback - 204 pages
$16.60
Renewable and Efficient Electric Power Systems
Renewable and Efficient Electric Power ...
Gilbert M. Masters
Hardcover - 712 pages
$110.70
Power System Relaying
Power System Relaying
Stanley H. Horowitz, ...
Hardcover - 398 pages
$122.30
Photovoltaic Design and Installation For Dummies
Photovoltaic Design and Installation For ...
Ryan Mayfield
Paperback - 384 pages
$19.14
How to Solar Power Your Home Everything You Need to Know Explained Simply (Back-To-Basics Conserving)
How to Solar Power Your Home Everything You ...
Martha Maeda
Paperback - 336 pages
$15.53
Do It Yourself 12 Volt Solar Power, 2nd Edition (Simple Living)
Do It Yourself 12 Volt Solar Power, 2nd ...
Michael Daniek
Paperback - 128 pages
$13.41
Photovoltaic Systems Engineering, Third Edition
Photovoltaic Systems Engineering, Third ...
Roger A. Messenger, ...
Hardcover - 528 pages
$107.04
Power System Monitoring and Control
Power System Monitoring and Control
Hassan Bevrani, ...
Hardcover - 288 pages
$108.04
Submarine Power Cables: Design, Installation, Repair, Environmental Aspects (Power Systems)
Submarine Power Cables: Design, ...
Thomas Worzyk
Hardcover - 296 pages
$151.20
Electric Energy: An Introduction, Third Edition (Power Electronics and Applications Series)
Electric Energy: An Introduction, Third ...
Mohamed A. El-Sharkawi
Hardcover - 606 pages
$107.04
Large-Scale Solar Power Systems: Construction and Economics (Sustainability Science and Engineering)
Large-Scale Solar Power Systems: ...
Dr Peter Gevorkian
Paperback - 400 pages
$49.43
Electric Power Substations Engineering, Third Edition (Electrical Engineering Handbook)
Electric Power Substations Engineering, ...
Hardcover - 536 pages
$125.96
The Homeowner's DIY Guide to Electrical Wiring
The Homeowner's DIY Guide to Electrical ...
David Herres
Paperback - 336 pages
$19.08
Convex Optimization of Power Systems
Convex Optimization of Power Systems
Joshua Adam Taylor
Hardcover - 209 pages
$90.77
Smart Power Grids 2011 (Power Systems)
Smart Power Grids 2011 (Power Systems)
Hardcover - 696 pages
$103.84
Power Generation and the Environment
Power Generation and the Environment
Anco S. Blazev
Hardcover - 1333 pages
$191.21
Smart Grid Standards: Specifications, Requirements, and Technologies
Smart Grid Standards: Specifications, ...
Takuro Sato, Daniel ...
Hardcover - 425 pages
$117.35
Wind Turbine Operation in Electric Power Systems: Advanced Modeling
Wind Turbine Operation in Electric Power ...
Zbigniew Lubosny
Paperback - 262 pages
$209.00
Renewable Fuel Standard: Potential Economic and Environmental Effects of U.S. Biofuel Policy
Renewable Fuel Standard: Potential Economic ...
Committee on Economic ...
Paperback - 250 pages
$68.00
Photovoltaics: Design and Installation Manual
Photovoltaics: Design and Installation ...
Solar Energy ...
Paperback - 336 pages
$36.74
Optimization of Power System Operation (IEEE Press Series on Power Engineering)
Optimization of Power System Operation ...
Jizhong Zhu
Hardcover - 664 pages
$126.66
Renewable and Efficient Electric Power Systems
Renewable and Efficient Electric Power ...
Gilbert M. Masters
Hardcover - 680 pages
Power Quality: Problems and Mitigation Techniques
Power Quality: Problems and Mitigation ...
Bhim Singh, Ambrish ...
Hardcover - 600 pages
$131.32
Design of Smart Power Grid Renewable Energy Systems
Design of Smart Power Grid Renewable Energy ...
Ali Keyhani
Hardcover - 592 pages
$116.96
Large-Scale Solar Power System Design (GreenSource Books): An Engineering Guide for Grid-Connected Solar Power Generation (McGraw-Hill's Greensource)
Large-Scale Solar Power System Design ...
Peter Gevorkian
Hardcover - 704 pages
$98.33
Small Geothermal Energy Systems and Geothermal Heat Pumps: Guide for the Do-it-Yourselfer (DIY), Ground Source Heat Pumps, Information Survival Kit for Heat Pump Owners, Energy Program Successes
Small Geothermal Energy Systems and ...
U.S. Government, ...
Kindle Edition - 226 pages
Waste-to-Energy: Advanced Cycles and New Design Concepts for Efficient Power Plants
Waste-to-Energy: Advanced Cycles and New ...
Lisa Branchini
Hardcover - 145 pages
$99.99


Have some knowledge to share

If you have some expert knowledge or experience, why not consider sharing this with our community.  

By writing an electrical note, you will be educating our users and at the same time promoting your expertise within the engineering community.

To get started and understand our policy, you can read our How to Write an Electrical Note