The Variable Frequency Drive Misting Pump (VFD) is an electric motor, driven by a variable frequency drive. A variable frequency drive (VFD) or adjustable speed drive is a device used to control the speed of an electric motor by controlling the frequency of the electrical power sent to the motor. The VFD units are primarily desired for many commercial and industrial applications because of its electrical related efficiencies. They are energy efficient and the1500psi VFD Misting Pumps are now available in multiple flow rates. Standard sizes include 1gpm, 2gpm and 3gpm. The VFD system allows the mist pump to automatically adjust output flow based on the demand of each zone. This allows for continuous operation, longer pump and motor life, reduced noise, soft start, and significantly lower energy consumption.
The Advanced Misting System VFD Misting Pump is substantially quieter with the inclusion of a pressure transducer that only turns the motor at the required hertz based on the flow demand for any given time. Generally the motor and the pump are both spinning at the rpm level that is less than a standard Direct Drive or Pulley Drive unit. This makes the Advanced Misting System VFD Misting Pump commonly used in all areas of misting that have several zones or noise sensitive areas. VFD Misting Pumps consume 25% less electricity than non-VFD systems due to the inclusion of the VFD inverter and the way it utilizes electricity.
As system flow requirements increase, the VFD will progressively increase the speed of the motor until the pump is providing the required flow to achieve the required 1000psi pressure. As this motor speed increases, it will increase the noise level and it is possible that if the motor and pump are required to spin at full hertz and rpm (60 and 1750 respectively) due to the maximum flow requirement for the systems, the noise level for the VFD in that scenario could be equivalent to the noise level of a Direct Drive or Pulley Drive unit of comparable size. However, because the VFD unit affects the speed of the motor being used, it is always possible to resize the VFD unit so that it never spins above a desired rpm.
VFD Misting Pump has no excess water being pressurized and bypassed, eliminating damage to the internal components of the pump from heat build up in the water supply. The VFD Misting Pump operates more efficiently because the pump is not over working itself by producing excess pressurized water.
These pumps can reduce electricity use by half compared to conventional misting pump systems. The benefits of using the Advanced Misting System VFD Misting Pump include continuous operation, longer pump and motor life, reduced noise, soft start, and significantly lower energy consumption.