A VFD (Variable Frequency Drive) is an electronic device that controls the speed of an AC motor by adjusting the frequency and voltage of the power supplied to it.
Instead of running a motor at full speed all the time, a VFD lets you:
- Adjust motor speed to match the task, which saves energy
- Start and stop smoothly (soft start/stop) to reduce mechanical stress
- Control torque for precise operation
- Reverse direction without extra switches
It works by converting incoming AC power to DC, then inverting it back to AC at the desired frequency. This gives you fine control over motor performance.
VFDs are used in pumps, fans, conveyors, compressors, and many industrial machines where variable speed and energy efficiency are important.