Power factor and harmonic correction circuit including ac startu

Details Power factor and harmonic correction circuit including ac startu Power factor and harmonic correction circuit including ac startu

1991-08-16

1993-06-29

DeBoer, Todd E.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

323205, 323208, 323901, 333175, 307105, 361113, 363 49, H02M 112, H02J 31

Patent

active

052240290

ABSTRACT:
A circuit for correcting power factor and for reducing ac line current harmonic components in conjunction with bridge-connected capacitive-filtered loads and for providing a source of ac startup current for associated circuitry, for example a switch mode power supply which may form part of the load. The circuit comprises a rectifier bridge, a dual-tuned circuit having a tuned filter in series between an ac line input and the bridge, and a shunt capacitor across the input to the bridge. The tuned filter comprises a parallel connected inductor and capacitor, the shunt capacitor being tuned with the inductor to form a trap filter to reduce third-order and higher harmonic components in the ac line current. The circuit also includes a current source operatively connected to the shunt capacitor for providing a source of ac current immediately upon application of ac power to the ac line input.

REFERENCES:
patent: 2134522 (1938-10-01), Lee
patent: 3908159 (1975-09-01), Griffey
patent: 4222096 (1980-09-01), Capewell
patent: 4369490 (1983-01-01), Blum
patent: 4453145 (1984-06-01), Schuster
patent: 4539617 (1985-09-01), Delaney et al.
patent: 4672522 (1987-06-01), Lesea
patent: 4937719 (1990-06-01), Yamada et al.
patent: 5051685 (1991-09-01), Sink
patent: 5148359 (1992-09-01), Nguyen
patent: 5148360 (1992-09-01), Nguyen
A. R. Prasad et al., "A Novel Passive Waveshaping Method for Single-Phase Diode Rectifiers", IEEE Transactions on Industrial Electronics, vol. 37, No. 6 (Dec. 1990).

Affiliated with

Also associated with

Rating

Power factor and harmonic correction circuit including ac startu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Power factor and harmonic correction circuit including ac startu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power factor and harmonic correction circuit including ac startu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1760600