Passive power filter circuit

Details Passive power filter circuit Passive power filter circuit

2007-06-26

2007-06-26

Vu, Bao Q. (Department: 2838)

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

C363S021080, C363S097000

Reexamination Certificate

active

11297352

ABSTRACT:
The present invention discloses an improved passive power filter circuit, wherein a rated compensating voltage is provided for the power factor compensating circuit in order to solve the problem of instable power output resulting from that the rated voltage is obtained via bypassing the standby power supply circuit in the conventional technology. Further, in the present invention, a circuit is used to pre-charge two filter capacitors, which are coupled to the DC output terminals of a rectifier, in order to offset the current phase advance or the current phase lag, which the conventional passive power filter circuit cannot solve, and thereby, the power factor is improved.

REFERENCES:
patent: 5517399 (1996-05-01), Yamauchi et al.
patent: 5777866 (1998-07-01), Jacobs et al.
patent: 6115268 (2000-09-01), Chang et al.
patent: 7026590 (2006-04-01), Lee et al.

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