How much of what you “know” do you actually know, and how much have you learned secondhand? Most of us probably pick up a large portion of our “knowledge” from secondhand sources (much like this ...

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 ...

OEMs and hobbyists benefit from technology’s trickle-down effect. Figure 1. Many industrial applications and small machines with a motor and limited I/O requirements can benefit from using AC VFDs with ...

Heat rate is often the single most important factor in a coal-fired power plant’s economic and emissions profile. Expressed in Btu/kWh or GJ/kWh, heat rate is a measure of efficiency: the quantity of ...

Variable frequency drives — or VFDs — can reduce energy consumption, improve realtime control, and lengthen motor life. Selecting the right one for your application requires asking the correct ...