Filtering choke arrangement for a frequency converter

Details Filtering choke arrangement for a frequency converter Filtering choke arrangement for a frequency converter

2007-10-18

2010-11-23

Enad, Elvin G (Department: 2832)

Inductor devices

Winding formed of plural coils

C336S181000, C336S182000, C336S184000, C336S220000, C336S221000

Reexamination Certificate

active

07839251

ABSTRACT:
Three-phase AC or two-phase DC choke arrangement of a frequency converter, in which is a magnetic core, in which are the phase-specific pillars of the AC choke arrangement or the branch-specific pillars of the DC choke arrangement (1a,1b), around which are arranged the phase-specific windings of the AC choke arrangement or the branch-specific windings of the DC choke arrangement (Ldc1+, Ldc1−) to filter difference-mode currents, and in which an additional pillar (3) for damping common-mode currents is arranged in the magnetic core of the choke. The additional pillar (3) is arranged without the phase-specific or branch-specific windings fitted around it, in which case damping of the common-mode currents is achieved by means of the common-mode impedance formed by the windings arranged around the additional pillar and around the phase-specific or the branch-specific pillars.

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