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US 7,453,330 B2Granted
Line filter
AssigneeEpcos AG
InventorsKurt Beil, Christian Paulwitz
Life of this patent
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Abstract
A line filter has a filter unit, which has an input and an output and also a current-compensated choke and a capacitance network. The choke has several phase windings on a common core. Each phase winding is connected in series with a phase conductor. The capacitance network has capacitors, which are each connected between a phase conductor and a neutral conductor. Another choke is provided in series to the neutral conductor, which is wound separately from the core.
Claims18
A line filter comprising:
- a plurality of input phase conductors;
- a plurality of output phase conductors;
- a filter unit comprising:
- an input coupled to the input phase conductors;
- an output coupled to the output phase conductors;
- a current-compensated choke having a plurality of phase windings on a common core, each phase winding being coupled into a respective filter unit phase conductor;
- a capacitance network having a plurality of capacitors, each capacitor coupled between a filter unit phase conductor and a neutral conductor;
- and
- another choke coupled in series to the neutral conductor, the another choke being wound separately from the core.
6 more elements
A filter unit for use with a line filter, the filter unit comprising:
- a current-compensated choke comprising a plurality of phase windings on a common core, each phase winding being connected into one of a plurality of phase conductors;
- a capacitance network comprising a plurality of capacitors, each capacitor being connected between one of the phase conductors and a neutral conductor;
- and
- another choke coupled in series with the neutral conductor, the another choke being wound separately from the common core.
1 more element
Dependencies are inferred from the claim text.