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 ...

The LCD/VFD controller project is based on HD44870 where the control command is compatible with Matrix-Orbital’s LCD module. The controller is based on a PIC16F873 MCU and in the design, there is no ...

A grouping of Mitsubishi Electric’s AC drives or variable frequency drives (VFDs). In the competitive landscape of machine design, engineers in food, pharmaceutical and manufacturing sectors face the ...

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 ...

To minimize the electromagnetic interference (EMI) and video noise caused by different signal frequencies inside the same piece of equipment, it's sometimes necessary to synchronize the switching ...