Hamilton Sundstrand Corporation

David L Heck

Christopher Blazer

Richard T Wetzel

Provided are embodiments for a system including a zero-cross circuit. The system includes a first channel and a second channel Each channel includes a generator, a generator relay, and a bus tie relay. In addition, the system includes a zero-cross circuit, wherein the zero-cross circuit synchronizes the operation of the first and second channel, and at least one controller configured to control the operation of the first channel and the second channel based on an input from the zero-cross circuit. Also provided is a method for operating the zero-cross circuit with low phase delay. The method includes receiving an inverting input, receiving a non-inverting input, and comparing the inverting input and the non-inverting input. The method also includes receiving feedback from an output of the comparator; and outputting a waveform based on the comparison of the inverting input and the non-inverting input and the feedback.

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Roscoe, IL, United States of America

David L Heck