Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Reexamination Certificate
2005-02-08
2005-02-08
Berhane, Adolf (Department: 2838)
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
Reexamination Certificate
active
06853564
ABSTRACT:
An alternate approach to meeting the harmonic current limits specified in EN61000-3-2 for power supplies, which fall under the classification of Class A equipment and also provide universal input voltages. In use, an electronic switch(triac) is used as the simple switch between low line input(90-132 VAC) and high line input(180-254 VAC) to provide an auto ranging front end. An inductor is placed in series with the input bridge diodes to increase the conduction angle of the input line current, thereby, increasing the power factor of the supply. This inductor is switched in series with the bulk capacitor whenever the triac is off. In this way, the harmonics are reduced at high line only, and the supply runs unaffected with low power factor at low line. Thus the harmonic currents are reduced at the test voltage of 230V without the need for an active power factor corrective front end.
REFERENCES:
patent: 3590362 (1971-06-01), Kakalec
patent: 3931565 (1976-01-01), Hase
patent: 4553199 (1985-11-01), Harada et al.
patent: 4564897 (1986-01-01), Okamoto et al.
patent: 4831508 (1989-05-01), Hunter
patent: 4855890 (1989-08-01), Kammiller
patent: 4982148 (1991-01-01), Engelmann
patent: 5146396 (1992-09-01), Eng et al.
patent: 5742103 (1998-04-01), Ashok
patent: 5986440 (1999-11-01), Deschenes et al.
patent: 6111230 (2000-08-01), Cao et al.
patent: 6411533 (2002-06-01), Hooijer et al.
patent: 20020050829 (2002-05-01), Xu
patent: 1 229 633 (2002-08-01), None
patent: 10-075565 (1998-03-01), None
Berhane Adolf
Scully Scott Murphy & Presser
Switching Power, Inc.
LandOfFree
Switched linear inductor circuit for switched power supply does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Switched linear inductor circuit for switched power supply, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switched linear inductor circuit for switched power supply will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3514040