Power factor improving arrangement

Details Power factor improving arrangement Power factor improving arrangement

1989-03-27

1990-04-03

Salce, Patrick R.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 17, 363126, H02M 112

Patent

active

049145592

ABSTRACT:
A power factor compensator (18) for a power converter (17) comprises an L-C circuit connected in series between the power converter and the converter's A.C. power source (13). The values of the inductor (30) and the capacitor (31) of the compensator circuit are selected to cause the L-C circuit to resonate at a frequency higher than the power source frequency, preferably at a frequency ranging between 1.4 and 3.5 times the power source frequency, in order to achieve a power factor within the range of about 0.65 to 0.95. A resonant frequency of about twice the power source frequency has been experimentally found to give particularly good performance.

REFERENCES:
patent: 1696880 (1928-12-01), Donle
patent: 1920948 (1933-08-01), Crouse
patent: 3906337 (1975-09-01), Depenbrock
patent: 4222096 (1980-09-01), Capewell
patent: 4369490 (1983-01-01), Blum
patent: 4412277 (1983-10-01), Mitchell
patent: 4672522 (1987-06-01), Lesea
patent: 4679129 (1987-07-01), Sakakibara et al.
G. J. Scoles, Handbook of Rectifier Circuits (John Wiley & Sons, 1980), pp. 169-171.
W. Shepherd et al., Energy Flow and Power Factor in Non-Sinusoidal Circuits, (Cambridge Univ. Press, 1979), pp. 234-258.
S. Smith, "A Universe of Ideas--Power Factor Correction--I", PCIM, Jan. 1987, p. 31.
S. Smith, "A Universe of Ideas--Power Factor Correction--II", PCIM, Feb. 1987, p. 64.
S. Smith, "A Universe of Ideas--Power Factor Correction--III", PCIM, Mar. 1987, p. 47.

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