LCL Filter for Regen Drives and Active Infeed Converters

LCL filters are essential to connect AFE (active front end) drives and AIC (active infeed converters) to the power grid. With the increasing need for saving electrical energy AFE/AIC's are now frequently installed for energy regeneration reasons. Regaining energy when an AC motor is coming to rest or braking avoids wasting energy in the motor or from the braking resistance.

In addition, LCL filters are also required to enable DC-AC converters feeding the electrical energy back to the grid.

Schaffner, the international leader in the field of electromagnetic compatibility and power quality, introduces the FN 6840 standard LCL filter range. They are ready to be installed and connected as one unit, as all the necessary LCL components are mounted in one preassembled package. The FN 6840 design allows various configurations from the same platform to also fulfill specific regeneration application needs.

With the correct match of an LCL filter to the AFE/AIC and the power grid, the FN 6840 LCL filter can limit the ripple current generated by the AFE/AIC to a level <5% and helps to reduce voltage distortions while improving the power quality.

The new compact 3 phase FN 6840 LCL filter series is available with 5 current ratings from 25 to 380A for 480 VAC. Depending on AFE/AIC versions, the LCL filter can be selected with or without a passive damping function.

Typical examples of AFE regenerative motor applications are elevators, hoists, and cranes or similar transportation systems, machine tools and machines with frequent braking cycles, centrifuges and special machines with high inertias, flywheels, winder/unwinder, press feeders, and test stands. All models are CE and RoHS compliant.
 

About Schaffner

The Schaffner Group is a global leader in solutions that ensure the efficient and reliable operation of power electronic systems by shaping electrical power.

The company’s portfolio includes EMC filters, power magnetic components, power quality filters, and related services. For the automotive industry, Schaffner develops and manufactures antennas used in keyless entry systems for vehicles, and filters for the drive systems of hybrid and electric vehicles and their charging infrastructure. Schaffner components are deployed in electronic motor controls, in wind power and photovoltaic systems, rail technology applications, machine tools and robots, electrical infrastructure, and power supplies for electronic devices. Headquartered in Switzerland, Schaffner serves its customers globally through its engineering and manufacturing centers in Asia, Europe, and North America.