Electrical transmission or interconnection systems – Miscellaneous systems – Conversion systems
Reexamination Certificate
2007-07-24
2007-07-24
Nguyen, Chau N. (Department: 2836)
Electrical transmission or interconnection systems
Miscellaneous systems
Conversion systems
C307S064000, C307S140000, C363S021040, C363S021050, C363S021110, C363S041000, C713S501000, C700S298000
Reexamination Certificate
active
10236876
ABSTRACT:
A closed loop power converter circuit of a UPS or other power supply includes a pulse width modulator circuit in a forward path of the closed loop power circuit. A compensation circuit provides pulse width commands to the pulse width modulator at a first rate. A feedback circuit digitally filters samples of an output of the closed loop power converter at a second rate greater the first rate and that provides the filtered samples to the compensation circuit. In some embodiments, the compensation circuit may be operative to compensate for the phase lag associated with a low pass output filter.
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Bobb Rennie
Pfitzer Hans
Rice Julius
Tassitino, Jr. Frederick
Tracy John G.
Cavallari Daniel
Eaton Power Quality Corporation
Nguyen Chau N.
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