Solidstate Controls, LLC

David R Bratton

Jeffrey M Powell

Garry A Reichle

A power circuit including an x and y inverter, an x and y constant voltage transformer, and a filtered d.c. input operable to provide a three phase sine wave output. The three phase outputs from the two transformers are a result of interconnections of the secondary windings of the transformer - in essence connecting the conventional two phase to three phase connections. The circuit is operable to provide a constant three phase output when a balanced load is applied. With an unbalanced load the phase of the output voltages of the two transformers are corrected relative to each other. A feedback circuit that includes an oscillator continuously samples the phase of the output voltage of each of the two transformers and adjusts the phase of one transformer output to that of the other.

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Dublin, OH, United States of America

David R Bratton