AC to DC power supply having zero frequency harmonic...

Details AC to DC power supply having zero frequency harmonic... AC to DC power supply having zero frequency harmonic...

2007-12-11

2010-11-23

Laxton, Gary L (Department: 2838)

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

C363S067000

Reexamination Certificate

active

07839664

ABSTRACT:
An AC-DC power supply circuit utilizing an output stage configuration designed to achieve no output ripple at the power line frequency. To eliminate the ripple formed, each separate processing output stage corresponding to a respective ac voltage source phase which provides a 120 Hz ripple, is stacked, in a series connection, and due to their respective ripple phase shifts of 120° degrees, achieves ripple cancellation at the output.

REFERENCES:
patent: 4641229 (1987-02-01), Easter
patent: 5311419 (1994-05-01), Shires
patent: 5321600 (1994-06-01), Fierheller
patent: 6297976 (2001-10-01), Isono
patent: 6608769 (2003-08-01), Bergk
patent: 6621721 (2003-09-01), York

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