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Basics of AC Motors Course

Free Course on Electrical Theory

Welcome to the third course in the STEP 2000 series,  Siemens Technical Education Program.

The course is a FREE self-study Electrical Engineering course designed to increase your automation and control knowledge at your own pace.

These courses are a fantastic study guide for students and also serve as a useful refresher course for engineers who are a long time out of college. 


(Photo Credit Siemens )






This course covers Basics of AC Motors 

Upon completion of Basics of AC Motors you should be able to:


• Explain the concepts of force, inertia, speed, and torque

• Explain the difference between work and power

• Describe the construction of a squirrel cage AC motor

• Describe the operation of a rotating magnetic field

• Calculate synchronous speed, slip, and rotor speed

• Plot starting torque, accelerating torque, breakdown 
torque, and full-load torque on a NEMA torque curve

• Apply derating factors as required by an application

• Describe the relationship between V/Hz, torque, and 
horsepower

• Match an AC motor to an application and its load

• Identify NEMA enclosures and mounting configurations




The course contents are listed below 


  • Introduction
  • AC Motors 
  • Force and Motion 
  • AC Motor Construction
  • Magnetism 
  • Electromagnetism 
  • Developing a Rotating Magnetic Field 
  • Rotor Rotation 
  • Motor Specifications 
  • NEMA Motor Characteristics 
  • Derating Factors
  • AC Motors and AC Drives 
  • Matching AC Motors to the Load 
  • Enclosures 
  • Mounting 
  • Siemens Motors 
  • Above NEMA Motors 
  • Review Answers 




This course has been developed by Siemens and can be downloaded from the below link. 

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