Electrical Motors: Practical Considerations (1.2 CEUs)

Venue: Webinar/Online

Location: Webinar/Online, Canada

Event Date/Time: Dec 12, 2011 End Date/Time: Dec 13, 2011
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Motors are the workhorse of industrial, building and commercial electrical power systems. This course combines theoretical and practical considerations and aspects of operational principles of motors, their types, selection, testing, maintenance and troubleshooting. The course emphasizes motor’s operational performance characteristics and electrical properties. The discussion is based on the latest IEEE and NEMA Standards governing motors and applications.

To provide a comprehensive understanding of principles of operation, types, selection, testing and commissioning, protection, maintenance and troubleshooting of AC electric motors.

Target Audience
Electrical professionals who need to refresh and expand their knowledge, maintenance managers, and power system consultants. A basic understanding of electrical system operations is needed, but participant do not necessarily have to be experts in the areas covered. In addition, professionals who are starting their career in the field of power in electrical utilities, industrial or commercial and institutional facilities will profit from this course.

Program Outline (1.2 CEUs / 12 PDHs)


Basic Principles

Electric currents and magnetic fields
Hysteresis, and eddy current losses
Efficiency and Losses
Induction Motors: The Basics

Rotating Magnetic Fields
Motor operational characteristics
Motor construction Features
Motor Operational Characteristics
Motor power and torque speed characteristics
Variations in motor torque speed characteristics: effects of voltage, frequency and unbalanced sources
Motor design classes
Motor insulation classes
Types of Electric Motors

Rotating magnetic fields in single-phase induction motors
Operational principles of single phase motors
Equivalent circuits for single phase induction motors
Starting single-phase induction motors
Shaded-Pole Motors
Split-Phase Motors
Permanent Split-Capacitor Motors
Capacitor Start Motors
Capacitor-Start-Capacitor-Run Motors
Repulsion Motors
Design letters of single phase small motors
Mechanical Considerations

Heating and Cooling
Motor Protection

Items to Consider in Protection of Motors
Types of Protection:
Phase unbalance, instantaneous phase overcurrent
Time-Delay Phase Overcurrent, Overload (Phase Overcurrent)
Instantaneous Ground Overcurrent, Time-Delay Ground Overcurrent
Phase Current Differential, Split Winding Current Unbalance
Stator Winding Overtemperature, Rotor Overtemperature
Induction Motor Incomplete Starting Sequence Protection
Protection Against Too Frequent Starting
Rotor Winding Protection
Lightning and Surge Protection
Protection Against Overexcitation from Shunt Capacitance
Protection Against Automatic Reclosing or Automatic Transfer
Protection Against Excessive Shaft Torques Developed During Transfer of Motors Between Out-of-Phase Sources
Protection Against Failure to Rotate or Reverse Rotation
Mechanical and Other Protection
Motor Maintenance, Testing and Troubleshooting

Failure modes
Bearing and lubrication
Preventive maintenance
On-line Diagnostic Testing
Motor Selection and Application

Electrical Factors to consider
Mechanical Factors to consider
Application considerations
Economics of motor owning
Dr. El-Hawary is a Professor of Electrical and Computer Engineering at Dalhousie University and was Associate Dean of Engineering between 1995 and 2007. His technical contributions cover more than forty years of sustained work in research, education and service to the community. On the research side, Dr. El-Hawary pioneered in computational solutions for economic operation of power systems including hydro-thermal systems. His fundamental and pioneering work on economic operation of power systems, the application of computational intelligence techniques to power system operational problems is frequently referred to by the users community, and is documented in ten textbooks and research monographs and more than 300 research articles.

He served as IEEE Canada President (2002-2003,) and Secretary of IEEE (2004-2005) and the Awards Board and Fellows Committee. Moreover, he served as IEEE Canada Awards Chair.

Dr. El-Hawary serves currently as a member of the 2010 Publications Services and Products Board, and is IEEE Press Power Engineering Series Editor. He served as Editor-in-Chief of IEEE Press in 2006-2007. He is Founding Editor, Power Letters, Power Engineering Society, is Associate Editor for the three major Electric Machines and Power Systems' Journals, and is Editor, Electrical Power Engineering, McGraw-Hill Encyclopedia of Science and Technology

Dr. El-Hawary received numerous awards and recognitions including the McNaughton medal and is a Fellow of the Canadian Academy of Engineering, the Institute of Electrical and Electronics Engineers, and the Engineering Institute of Canada.