Applications with varying loads benefit from the variable speed provided by an AC drive, because less power is used at lower loads and speeds. This article explains how an AC drive accomplishes this.

The device that controls the fan speed is called a variable speed drive. Variable frequency drives are also used on pumps and cooling towers to match the demand of the space with the proper energy ...

Recently, I wrote an article on the debate; do you get better mileage with AC on and windows up or ... differently and even changed the variable of speed. This is important for the revisit which ...

This will culminate in training for you on AC variable speed drives. In module 3 you will learn principles of DC motors, traditional brushed motors, as well as electronically driven brushless motors.