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 ...

Beyond the wheel, the most important mechanical equipment serving humanity is the centrifugal pump. Centrifugal pumps make modern quality of life possible. Turn on a faucet and a centrifugal turbine ...

Pioneer Pump, a brand under Franklin Electric Co. Inc., has launched the ElectricPAK VFD, a robust and easy-to-transport variable frequency drive (VFD) solution that is designed to meet the demands of ...

Optidrive E3 variable frequency drives (VFDs) from Invertek Drives have completely automated the control of pumps used to fill and empty ballast tanks on board commercial barges in the Netherlands. As ...

Speed, torque, and horsepower are three inter-related parameters in motor control. The speed of a motor, measured in revolutions per minute (rpm), defines a motor's ability to spin at a rate per unit ...

A Variable Frequency Drive (VFD) regulates the speed of a 3-phase AC electric motor by controlling the frequency and voltage of the power it delivers to the motor. These devices, also known as ...

As the cost of components and pumps becomes more affordable, variable speed pumps are being used to increase the efficiency and reliability of water distribution systems in multi-story buildings.