Redundant uninterruptible power supply systems
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United States of America Patent
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Jan 30, 2018
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app pub date -
Feb 21, 2014
filing date -
Feb 21, 2014
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Abstract
A system is provided. The system includes a plurality of uninterruptible power supplies (UPSs), a ring bus, at least one load electrically coupled to the plurality of UPSs and the ring bus, and a controller communicatively coupled to the plurality of UPSs. The controller is configured to calculate a phase angle for each UPS of the plurality of UPSs, wherein the phase angle is calculated relative to a common reference angle, and control operation of each UPS based on the respective calculated phase angles.
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