Introduction

Welcome to course in the STEP 2000 series, Siemens
Technical Education Program, designed to understand basic of AC drives more effectively. This course covers Basics of AC Drives.

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

• Describe the characteristics of constant torque, constant horsepower,
and variable torque applications

This knowledge will help you better understand different applications. In addition you should complete Basics of Electricity & Basics of induction motor before attempting Basics of AC Drives. An understanding of many of the concepts covered in Basics of Electricity & Basics of Induction motor is required for Basics of AC Drives.