Open AccessEffective filtering solution with low cost small size for common‐mode reduction in dc–dc converters
Author(s) -
Laour M.,
Tahmi R.
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2015.3296
Subject(s) - emi , chassis , electromagnetic interference , inductor , ground plane , converters , common mode signal , electrical engineering , ground , electrical impedance , engineering , power (physics) , electromagnetic compatibility , electronic engineering , physics , voltage , digital signal processing , structural engineering , quantum mechanics , antenna (radio) , analog signal
An effective solution is introduced aimed to reduce the size and cost of electromagnetic interference (EMI) filters in dc–dc converters. This method is based on the insertion of small ground inductor (grounded through RF inductor). This technique is suitable for unshielded cables. The RF inductor prevent the return current of the common‐mode (CM) noise at high frequencies, it is inserted between the earth ground (ground reference plane) and the chassis ground of the converter, therefore it isolate the converter chassis from power line ground at high frequencies. As well, maintaining the electrical safety grounding at the power frequency with very low impedance to ground. The efficiency of the proposed method is demonstrated by combining measurements and simulations for the fast testing. The level of CM current is compared versus a specific standard. This allows showing that the EMI emission levels can be reduced by as much as 30 dB.