The way we control the speed of fan motors or pump motors has tremendously changed in the past two decades with the introduction of variable-frequency drives (VFDs), aka variable-frequency controllers ...

However, if the system requires varied airflow, then using a variable-speed drive can save a lot of energy. The power requirement varies as the cube of the speed, so if airflow requirements are only ...

David Greenfield: Welcome to the Automation World Gets Your Questions Answered podcast, where we connect with industry experts to get the answers you need about industrial automation technologies. And ...