Back To Basics

Welcome to Module 20, which is about Adjustable Frequency Drives. An adjustable frequency drive is a device used to control the speed, Torque, Horsepower and direction of an AC motor.

Figure 1. Typical Adjustable Frequency Drives

Square D ALTIVAR71

        Reliance CV6000

Reliance MD65
 

Like the other modules in this series, this one presents small, manageable sections of new material followed by a series of questions about that material. Study the material carefully then answer the questions without referring back to what you’ve just read. You are the best judge of how well you grasp the material. Review the material as often as you think necessary. The most important thing is establishing a solid foundation to build on as you move from topic to topic and module to module.

A Note on Font Styles

Key points are in bold.

Glossary items are italicized and underlined the first time they appear.