Category: Danfoss

Sneakpeek at Danfoss new Active Harmonic Filter

At the SPS fair in Nürnberg 2019, Danfoss gave a sneak peek its new active harmonic filter for high power quality applications. Sources say it is due to be launched in q1 of 2020. We look forward to check out its specifications. Danfoss was the first drives manufacturer to use active harmonic filters as a solution for their low harmonic drives, often applied when complying with for instance IEEE519.  Last year Schneider followed up showing its Active Harmonic Filter in combination with multiple drives at SPS, see Active Harmonic Filters & Drives. The Danfoss filter AAF007 seems to be modular based on the picture presented.


Danfoss new Active Harmonic Filter AAF007


Vacon Launches NXC Low Harmonic Drive Based on Active Harmonic Filter Technology

Vacon Low Harmonic NXCVacon joins Danfoss as the second tier 1 drives manufacturer to integrate an active harmonic filter with a drive to lower harmonics. Vacons stand-alone NXC range previously offered 12 pulse as well as active front end drive solutions.

The Low Harmonic NXC was recently shown at a large exhibition in Sweden and is reportedly offered on a project by project basis but will become a standard offering in the near future. The system shown, verifies the smaller foot print and weight of the Active Filter drive system compared to the more common Active Front End drives. The active filter NXC also has a lower power loss, which is becoming more important as the EN 50598-2 standard is introduced.

AHF Compensates Thruster and Refrigeration Compressor

Danfoss used an Active Harmonic Filter to compensate the THD of their installed 960 kW of VFDs for thruster and refrigeration compressor on the fishing vessel Gitte Henning #8. The AHF ensured to keep the installation within class requirements. Read more at:

Danfoss VFDs on Gitte Henning #8