Eaton Power Quality Corporation

Hans Pfitzer

Frederick Tassitino, Jr

John Gaylord Tracy

Julius Rice

Rennie Bobb

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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Wake Forest, NC, United States of America

Hans Pfitzer