A variable-speed drive (VSD) is used to drive a motor at variable speed. The main parts of a VSD are The control system of the VSD adjusts the output voltage and frequency so that the ratio of voltage ...

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.

Such adjustments are usually accomplished with a variable speed drive (VSD) system. They are an important part of automation. They help to optimize the process, reduce investment costs, energy ...