Low cost AC-to-DC converter having input current with reduced ha

Details Low cost AC-to-DC converter having input current with reduced ha Low cost AC-to-DC converter having input current with reduced ha

1997-02-03

1998-05-12

Berhane, Adolf

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 45, H02M 3335

Patent

active

057515611

ABSTRACT:
An AC-to-DC power converter achieves greater than 80 percent power factor correction with greater than 75 percent efficiency using only one power switch, only one magnetic component, only one control loop, and a storage capacitor. The only magnetic component is a transformer having first primary winding, a second primary winding, and at least one secondary winding. During a first time interval of the period of the AC input current, the second primary winding is energized with energy previously stored in a storage capacitor. During a second time interval of the period of the AC input current, the first primary winding is energized with energy of an input current flowing through the AC input terminals. As a result, the AC-to-DC power converter drawns input current for an extended period of time before the point in time when the input voltage peaks and also for an extended period of time after the point in time when the input voltage peaks. Magnitudes of input current harmonics with respect to the fundamental input current are therefore reduced with an AC-to-DC power converter having only one magnetic

REFERENCES:
patent: 4412277 (1983-10-01), Mitchell
patent: 4437146 (1984-03-01), Carpenter
patent: 4677366 (1987-06-01), Wilkinson et al.
patent: 4853837 (1989-08-01), Gulczynski
patent: 4940929 (1990-07-01), Williams
patent: 4974141 (1990-11-01), Severinsky et al.
patent: 5066900 (1991-11-01), Bassett
patent: 5067066 (1991-11-01), Chida
patent: 5088019 (1992-02-01), Williams et al.
patent: 5097196 (1992-03-01), Schoneman
patent: 5126931 (1992-06-01), Jitaru
patent: 5134355 (1992-07-01), Hastings
patent: 5173846 (1992-12-01), Smith
patent: 5180964 (1993-01-01), Ewing
patent: 5206800 (1993-04-01), Smith
patent: 5224025 (1993-06-01), Divan et al.
patent: 5227941 (1993-07-01), Rubin
patent: 5231563 (1993-07-01), Jitaru
patent: 5262930 (1993-11-01), Hua et al.
patent: 5264780 (1993-11-01), Bruer et al.
patent: 5331534 (1994-07-01), Suzuki et al.
patent: 5343378 (1994-08-01), Tohya
patent: 5442539 (1995-08-01), Cuk et al.
patent: 5446366 (1995-08-01), Bassett et al.
patent: 5448465 (1995-09-01), Yoshida et al.
patent: 5515257 (1996-05-01), Ishii
Dr. Fred Lee & Dr. Dusan Borojevic, Switching Rectifiers for Power Factor Correction, 1994, pp. #145-151.
Richard Redl & Laszlo Balough, Design Consideration for Single-Stage Isolated Power-Factor-Corrected Power Supplies w/Fast Regulation of the Output Voltage, 1995.
Odd Roar Schmidt, Quasi Resonant AC/DC Forward Converter with Sinusoidal Input Current, 1994, pp. 190 339-344.
TDK non-translated Japanese document.
IEC (International Electrotechnical Commission), International Standard, Electromagnetic Compatibility, 1995, pp. #7-27.
G.Hua, E.Yang, Y.Jiang, & F. Lee, Novel Zero Current-Transition PWM Converters.
Liu Yang & C.Q. Lee, Analysis and Design of Boost Zero-Voltage-Transition PWM Converter, 1993, pp. #707-713.
Ionel Jitaru, Soft Transitions Power Factor Correction Circuit, 1993, pp. #202-208.

Affiliated with

Also associated with

Rating

Low cost AC-to-DC converter having input current with reduced ha does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low cost AC-to-DC converter having input current with reduced ha, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low cost AC-to-DC converter having input current with reduced ha will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-988495