A variable frequency drive (VFD) is an electronic device that controls the speed and torque of an electric motor by adjusting the frequency and voltage of its power supply:
VFDs are also known as adjustable frequency drives, adjustable speed drives, variable speed drives, AC drives, micro drives, inverter drives, or drives.
Here are some ways VFDs can be used:
Improve production: By operating motors at the most efficient speed, fewer mistakes occur and production levels increase.
Reduce noise levels: VFDs can help lower noise levels.
Reduce mechanical stress: VFDs can help reduce mechanical stress on machines.
Improve working environment: VFDs can help improve the working environment.
Isolate AC motor starters: VFDs can be used to isolate AC motor starters so that if one starter fails, it doesn't affect all other motors.
VFDs work by converting the AC supply to DC using a rectifier, and then converting the DC supply back to a variable frequency supply using an inverter.
