Three-Phase Motors Part II

Train in the components and functions of externally excited motors, starters, and variable speed drives. There is also a review topic to reinforce the information covered in the lesson, Three-Phase Motors Part I.

Prerequisites

Completion of the lesson, Three-Phase Motors Part I, is recommended.

Description

This is the fourth lesson in the iKNOW® AC/DC Motor Theory Library. This lesson defines and explains the components and functions of externally excited motors, starters, and variable speed drives. There is also a review topic to reinforce the information covered in the lesson, Three-Phase Motors Part 1.

Objectives

Explain the design of an externally excited motor. Explain how an externally excited motor works. Explain the function of a motor starter. Describe the most common types of motor starters. Describe a variable speed drive and its effect on voltage and frequency.