Network for obtaining high power and low total harmonic distorti

Details Network for obtaining high power and low total harmonic distorti Network for obtaining high power and low total harmonic distorti

1991-12-23

1992-09-15

Voeltz, Emanuel T.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

323205, 323208, 333175, H02M 112

Patent

active

051483599

ABSTRACT:
An arrangement includes a network for connection between an AC power supply and the input of a DC power supply containing rectifiers and a filter capacitor. The network forms a third order, damped low-pass filter that waveshapes the AC input current so as to either reduce or remove the magnitude of harmonics which primarily cause distortion of the input current waveform. In a preferred embodiment, the waveshaping network includes an inductor connected in series with the input of the DC power supply. A series combination of a damping resistor and a first capacitor is connected in parallel with the series inductor. A second capacitor is connected in shunt with the input terminals of the DC power supply. The waveshaping network increases the power factor and lowers the total harmonic distortion the input of the DC power supply presents to the AC power supply.

REFERENCES:
patent: 4222096 (1980-09-01), Capewell
patent: 4369490 (1983-01-01), Blum
patent: 4672522 (1987-06-01), Lesea
patent: 4749913 (1988-06-01), Stuermer et al.
patent: 4914559 (1990-04-01), Deisch
patent: 4930061 (1990-05-01), Slack et al.
patent: 4961044 (1990-10-01), Kravitz
patent: 5012161 (1991-04-01), Borowiec et al.
Powertechnics Magazine, Feb. 1991, pp. 20-24, Wilkenson, Bruce, "Power Factor Correction and IEC 555-2".
Compliance Engineering, Fall 1991, pp. 33-39, Martin, Robert, "Harmonic Distortion and IEC 555-2".

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