What are the differences between a variable frequency drive (VFD) and a variable speed drive (VSD)?

Variable Speed Drives
60 Minute Guide to Variable Speed Drives

60 Minute Guide to Variable Speed Drives

This Quick and Easy Guide is a must have for any engineer who uses Variable Speed Drives!

Claim your FREE guide

A variable frequency drive (VFD) refers to AC drives only and a variable speed drive (VSD) refers to either AC Drives or DC Drives. VFDs vary the speed of an AC motor by varying the frequency to the motor. VSDs referring to DC motors vary the speed by varying the voltage to the motor.

Why not order one of our FREE Guides to Variable Speed Drives? A quick and easy guide for engineers on VSDs, set up and best practice. Follow this link.

Similar FAQs

Energy Efficiency

When should I use a Softstarter versus a Variable Speed Drive?
Read article
Energy Efficiency

How do I know what energy I will save if I use a Variable Speed Drive on my Application?

It is impossible to accurately calculate energy savings using manufacturers’ software tools because of the many variables that must be

Read article
Energy Efficiency

Can I Save Energy with Variable Speed Drive?

With energy costs soaring many of our customers are asking, ‘Can I save energy with Variable Speed Drives?’ The Short

Read article
Variable Speed Drives

What is the recommended maintenance schedule for Variable Speed Drives to reduce downtime?

Variable speed drives (VSDs) are now more efficient, productive, and easy to use than ever before, but efficiency levels

Read article