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Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components

Reexamination Certificate

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C363S044000, C363S047000

Reexamination Certificate

active

07667988

ABSTRACT:
EMC filter, for connection between a mains supply network and a mains-operated appliance to reduce conduction noise between said supply network and said appliance, comprising a voltage divider connected to said mains network, for generating a voltage lower than a voltage of said mains network; rectifying means, connected to an output of said voltage divider, for generating a DC voltage; and an electronic active circuit, supplied by said DC voltage, for absorbing a noise current transmitted between said supply network and said appliance.

REFERENCES:
patent: 4402028 (1983-08-01), Udren et al.
patent: 5666255 (1997-09-01), Muelleman
patent: 5905642 (1999-05-01), Hammond
patent: 6122183 (2000-09-01), He et al.
patent: 6775157 (2004-08-01), Honda
patent: 6839249 (2005-01-01), Kalman et al.
patent: 2002/0171473 (2002-11-01), Pelly
patent: 2003/0128558 (2003-07-01), Takahashi et al.
patent: 2003/0218498 (2003-11-01), Pelly
patent: 2004/0008527 (2004-01-01), Honda
Quian Zhaoming et al., “Status of electromagnetic compatibility research in power electronics,” The Third International Power Electronics and Motion Control Conference, Aug. 15-18, 2000, IEEE, vol. 1, Aug. 15, 2000, pp. 46-57.
I. Takahashi et al., “Active EMI filter for switching noise of high frequency inverters,” Power Conversion Conference, Nagaoka, Japan, Aug. 3-6, 1997, IEEE, vol. 1, Aug. 3, 1997, pp. 331-334.

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