While commonplace now on chillers and air handlers, variable frequency drives (VFDs) have a tremendous range of uses and can ensure your building is always using just as much energy as it needs to. With about 25% of the world’s electrical energy consumed by electric motors in industrial applications, the use of VFDs can go a long way to reducing your building’s overall energy use for a low upfront cost (and with numerous rebate options). So, what are they? VFDs are motor controllers that drive electric motors by varying the frequency and voltage supplied. Frequency (or hertz) is directly related to the motor’s speed (RPMs). In other words, the faster the frequency, the faster the RPMs go. If an application does not require a motor to run at full speed, the VFD can be used to ramp down the frequency and voltage to just meet the necessary requirements and save the additional energy. With applications from pumps to fans and everything in between, VFDs are a low-cost way to avoid wasting excess energy in applications throughout your facility.
Delta Variable Frequency Drives Delta Electronics offers a full suite of Variable Frequency Drives (VFD) including fan/pump series VFDs complete with NEMA 1 enclosures, BACnet and Modbus communications and built-in EMC filtering on many models. In addition to the VFDs, the Delta Controls eZVFD Integration Module for the Delta VFD CP2000 and CFP2000 series integrates these drives into the Delta Building Automation System. Connecting the eZVFD directly to the VFD communication port allows the VFD to operate as a Delta Controls controller. This not only eliminates the need for a separate controller, you can also set up and command drive parameters over the BACnet network using Delta’s facility management software enteliWEB.