16 Feb 2022

Ventilation system designers can combine a VLT® HVAC Drive with the most efficient fan and permanent magnet motor, using Danfoss Drives’ EC+ concept. The combination of components allows users to achieve the full potential of a highly efficient fan.

overall system efficiency

To achieve the highest performance and system efficiency when building an HVAC system, the individual components – drive, motor, and fan – need to be flexible and broadly compatible with each other.

For instance, if a high-efficiency motor that is only compatible with lower efficiency fans is selected, the overall system efficiency would suffer and would not reflect the highest performance – and investment – in the individual components. The EC+ concept allows the ventilation system designers to combine a VLT® HVAC Drive with the most efficient fan and high-efficiency permanent magnet or synchronous reluctance motor for best energy efficiency.

Advantages

The key to the EC+ is intelligent interaction of the system components. Only the optimal interaction of the system components – fan, motor, electronics, diffuser – makes the full potential of a highly efficient fan realizable.

Advantages of the EC+ concept:

  • Free choice of motor technology: PM, asynchronous, or synchronous reluctance with the same AC drive
  • Device installation and operation remain unchanged
  • Manufacturer independence in the choice of all components
  • Superior system efficiency thanks to a combination of individual components with optimum efficiency
  • Retrofitting of existing systems is possible
  • Wide range of rated powers for standard, PM, and synchronous reluctance motors