Understanding the distinction between AC and DC drives and their roles in the regulation of speed and power in electric motors can be critical to helping your business. Simply put, a drive is a device that is used to control the speed of an electric motor by altering the frequency of the electrical supply to the motor. AC and DC drives perform this action in markedly different ways and to differing effects. Below, we’ll discuss the distinctions between the two types of drives and help you determine which drive - whether AC or DC - would be best suited for your application.