Variable Frequency Drives (Constant Pressure Systems)
A variable frequency drive (VFD) is a type of motor controller that drives an electric motor by varying the frequency and voltage of its power supply. The VFD also has the capacity to control ramp-up and ramp-down of the motor during start or stop, respectively.
There are many reasons why we may want to adjust this motor speed:
- Save energy and improve system efficiency
- Convert power in hybridization applications
- Match the speed of the drive to the process requirements
- Match the torque or power of a drive to the process requirements
- Improve the working environment
- Lower noise levels, for example from fans and pumps
- Reduce mechanical stress on machines to extend their lifetime
- Shave peak consumption to avoid peak-demand prices and reduce the motor size required