Welcome to another course in the STEP 2000 series, Siemens
Technical Education Program, designed to prepare our
distributors to sell Siemens Energy & Automation products
more effectively. This course covers Basics of AC Drives and
related products.



Upon completion of Basics of AC Drives you should be able to:
Explain the concept of force, inertia, speed, and torque
Explain the difference between work and power
Describe the construction of a squirrel cage AC motor
Identify the nameplate information of an AC motor
necessary for application to an AC Drive
Describe the operation of a three-phase rotating magnetic
field
Calculate synchronous speed, slip, and rotor speed
Describe the relationship between V/Hz, torque, and
current
Describe the basic construction and operation of a PWM
type AC drive
Describe features and operation of the Siemens
MICROMASTER and MASTERDRIVE VC
Describe the characteristics of constant torque, constant
horsepower, and variable torque applications