Input harmonic current corrected AC-to-DC converter with multipl

Details Input harmonic current corrected AC-to-DC converter with multipl Input harmonic current corrected AC-to-DC converter with multipl

1995-10-16

1997-02-04

Nguyen, Matthew V.

Electric power conversion systems

Current conversion

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

363 89, H02M 3335

Patent

active

056005466

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 component.

REFERENCES:
patent: 5331534 (1994-07-01), Suzuki et al.
patent: 5343378 (1994-08-01), Tohya
patent: 5442539 (1995-08-01), Cuk et al.
patent: 5448465 (1995-09-01), Yoshida et al.
patent: 5515257 (1996-05-01), Ishii
M. M. Jovanovic', et al., "Reduction of Voltage Stress in Integrated High-Quality Rectifier-Regulators by Variable-Frequency Control", 1994, Switching Rectifiers for Power Factor Correction, vol. V of the VPEC Publication Series, pp. 145-151.
Richard Redl and Laszlo Balogh, 1995 IEEE, "Design Considerations for Single-Stage Isolated Power-Factor-Corrected Power Supplies with Fast Regulation of the Output Voltage," pp. 454 through 458 (1995).
Odd Roar Schmidt, 1994 IEEE, "Quasi Resonant AC/DC Forward Converter With Sinusoidal Input Current," pp. 339 through 344 (1994).

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