Danfoss introduced the world’s first mass-produced Variable Frequency Drive (VFD) in 1968.

Danfoss’ unequalled experience was used to make the VLT® AQUA Drive the perfect match for pumps and blowers. With a wide range of powerful standard and optional features designed specifically for pump and blower applications, the VLT® AQUA Drive provides the lowest overall cost of ownership of any drive available.

Danfoss VFDs are used to control the speed of an electrical motor in order to:

  • enhance process control
    reduce energy usage and generate energy efficiently
    decrease mechanical stress on motor control applications
    optimize the operation of various applications relying on electric motors

Drives can also be utilized to convert energy from natural and renewable resources like the sun, wind or tides, and transmit it to the electrical network or use it for local consumption. In hybrid technologies, AC drives are used to combine conventional energy sources and energy storages to create total energy management solutions.

AC drives are also known by various other names such as adjustable speed drives, adjustable frequency drives, variable frequency drives, variable speed drives, frequency converters, inverters and power converters.

Product Specific Info:
Danfoss VFDs provide high efficiency (>98%) They have an available sleep mode which shuts off pumps when demand is low and feature a patented „„Automatic Energy Optimization feature which produces typical savings of 3–5% (up to 15% possible)

„„Danfoss VFDs have a unique cooling concept and an „„Intuitive user interface with the new, award-winning local control panel (LCP). Their SmartStart setup wizard guides the user through a series of simple steps to ensure accurate and efficient motor control and their „„Automatic Motor Adaptation streamlines installation by automatically tuning the drive to the motor without spinning it or requiring the load to be decoupled

Danfoss VFDs have non-saturating reactors that provide better harmonic performance than a 5% AC line reactor or saturating DC reactor and they can protect your system with a series of pump-specific features:

„„Cascade controller
„„Dry pump detection
„„End of curve detection
„„Motor alternation
„„2-step ramps (initial ramp)
„„Pipe fill mode
„„Overload trip protection
„„Smart logic controller
„„User-selectable variable or constant torque operation
„„NEMA/UL Type 12 (IP 54/55), NEMA 3R, and NEMA 4X/IP66 enclosures can eliminate the need for separate enclosures