Inrush current control circuit

Details Inrush current control circuit Inrush current control circuit

2008-05-27

2008-05-27

Nguyen, Matthew V (Department: 2838)

Electric power conversion systems

Current conversion

Including automatic or integral protection means

C363S089000, C323S225000, C323S908000

Reexamination Certificate

active

11485425

ABSTRACT:
An inrush current control circuit includes a first and second control units connected in series, wherein the first and second control units all have a current limiting resistor and switch connected in parallel. The current limiting resistor of the first control unit is used to prevent an inrush current generated at the moment an alternative current is supplied. The switch of the first control unit turns on based on the voltage of the capacitor, and current bypasses the first current limiting resistor. The current limiting resistor of the second control unit is used to prevent an inrush current generated at the moment an alternative current shifts from a high voltage level to a low voltage level or from a low voltage level to a high voltage level. The switch of the second control unit turns on based on the alternative current and current bypasses the second current limiting resistor.

REFERENCES:
patent: 5420780 (1995-05-01), Bernstein et al.
patent: 5920186 (1999-07-01), Ninh et al.
patent: 7068016 (2006-06-01), Athari
patent: 7164591 (2007-01-01), Soldano
patent: 2006/0274468 (2006-12-01), Phadke

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