DC power line filters optimize EMC behavior

The energy transition not only presents challenges in terms of the load capacity of the existing power grid, but also has significant implications for electromagnetic compatibility (EMC). In applications such as solar inverters, DC fast chargers for electric vehicles and battery storage systems, DC voltage is converted to AC voltage, or vice versa.

Suppressing the EMC disturbances generated in the process requires the use of AC filters. However, DC filters are also often indispensable, as DC cables can act as antennas for high-frequency interference signals. The availability of standard DC filters is currently limited and these filters often need to be customized for specific applications.

For this purpose, EMI Solution offers two standard filter series that can serve as a basis:

• MF610:
  Designed for switching power supplies and PV systems.
  Suitable for voltages up to 1200Vdc and currents from 25 to 2500A.
  Complies with UL1283, CSA22.2 -no8-13 and IEC60939.
  Also available in a low leakage current version, which lacks the Y capacitor.

• MF620:
  Developed for power line filtering in DC chargers.
  Suitable for voltages up to 1500Vdc and currents from 150 to 1600A.
  Complies with IEC61851-23, UL2002 and UL60939-3.

EMI Solutions also offers application-specific modifications to ensure optimal filter performance.