Method and device for filtering and damping conducted interference caused by ultimate consumers

Abstract

Abstract The invention concerns a method and device for filtering and damping conducted interference caused by ultimate consumers, in particular by transistorized pulse converters, the interference occurring in supply networks, in particular three-phase networks. A plurality of different filter stages is arranged in succession in that, in a first filter stage, one commutating reactor (KD1, KD2, KD3) in each case is switched into each power phase (U, V, W) and after each reactor symmetrical interference is filtered out by star connection of one capacitor (C4, C5, C6) in each case to earth potential (PE), and asymmetrical interference is filtered out by delta connection of one capacitor (C1, C2, C3) in each case with damping resistance (R1, R2, R3) connected in series between the individual phases. In a subsequent filter stage the supply network is decoupled by a series reactor (VD1, VD2, VD3) switched into each power phase, and, in a final filter stage, asymmetrical interference is finely filtered in each case by a capacitor (C7, C8, C9), which is switched to earth potential in the form of a star connection, and subsequent current-compensated reactors (SKD1, SKD2, SKD3) switched into each power phase and having a common annular core (RK).

Inventors

• 👤 Franz Imrich
• 👤 Bernd Segger

Bibliographic Details