Welcome to another course in the STEP series, Siemens Technical Education Program, designed to prepare our distributors to sell Siemens Energy & Automation productsmore effectively. This course covers Basics of AC Motors and related products.
Upon completion of Basics of AC Motors you should be able to:
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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
Describe Siemens NEMA, IEC, and above NEMA motors





