External line harmonics reduction module for power supplies

Electrical transmission or interconnection systems – With harmonic filter or neutralizer

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363 39, H02J 301

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active

057421030

ABSTRACT:
A line harmonics reduction module is enclosed in a chassis having a receptacle and a plug on opposite faces, for connection externally to a computer system unit or similar electronic equipment between the AC line power cord and the AC power receptacle contained in the computer system unit. The module may contain passive components such as an inductor, or may contain active circuitry designed to reduce the amplitudes of current components at harmonics of the line frequency by forcing the current waveform to be more nearly sinusoidal.

REFERENCES:
patent: 4630163 (1986-12-01), Cooper et al.
patent: 5001620 (1991-03-01), Smith
patent: 5181000 (1993-01-01), Smith
patent: 5349284 (1994-09-01), Whittle
patent: 5434740 (1995-07-01), Chan
patent: 5532917 (1996-07-01), Hung
Andreycak, Bill, "Active Power Factor Correction Using Zero Current and Zero Voltage Switching Techniques" Jun. 1991 HFPC Conference Proceedings.
Andreycak, Bill, "Power Factor Correction Using the UC3852 Controlled On-Time Zero Current Switching Technique", 1993-94 Unitrode Product & Applications Handbook, pp. 9-328 -9-343.
Andreycak, Bill, "Power Factor Correction Using the UC3852 Controlled On-Time Zero Current Switching Technique", 1995 estimated publication date.
Power Factor Correction Using The UC3852 Controlled On-Time Zero Current Switching Technique, By: Bill Andreycak; 10-269 -10-279, 1995.
Draft International Standard Project De Norme Internationale; Project No. 77A.1.9, Jan. 1993, pp. 1,1a,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39,41,43,45.
Power Factor Corrected Rectifying Circuit; Feb. 9, 1993; 22 pages plus 9 pages of drawings, now U.S. patent No. 5, 532,917 issued Jul. 2, 1996, Hurg.

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