Power distribution systems using distributed current sensing
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United States of America Patent
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Nov 18, 2014
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app pub date -
Apr 4, 2011
filing date -
Apr 4, 2011
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Abstract
A system includes a plurality of power conversion devices, for example, uninterruptible power supply (UPS) devices, having inputs coupled in common to a power input line and each including a control circuit configured to operate the power conversion device responsive to a current sense signal at a current sense input thereof. The system further includes a first current transformer having a primary winding inductively coupled to the power input line, a current sense line coupled in series with a secondary winding of the first current transformer and a plurality of second current transformers, each including a primary winding inductively coupled to the current sense line and including respective secondary windings coupled to respective ones of the current sense inputs.
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