FILTER ARRANGEMENT

摘要

2074260 9109451 PCTABS00005 A filter arrangement is useful for filtering and damping harmonics and for shifting resonance points in electric networks. To this end, a first energy-absorbing damping element (Rp21) is connected in parallel with a series arrangement consisting of a first inductance (Lp2), a first capacitance (Cp21) and a fourth capacitance (Cp22). This parallel arrangement is connected in series with a parallel path consisting of a second inductance (Lp3) and a second capacitance (Cp3), as well as with a third capacitance (C1). In addition, a second energy-absorbing damping element (Rp41) is connected in parallel with the series arrangement consisting of the fourth capacitance (Cp22) and the second capacitance (Cp3). The use of this filter arrangement in the case of two tuning frequencies permits strong damping of harmonic currents with frequencies close to one of the two tuning frequencies, without significant losses due to currents with the operating frequency.