Multi-mode uninterruptible power supplies and methods of operation thereof
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United States of America Patent
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May 23, 2006
Grant Date -
Sep 15, 2005
app pub date -
Mar 9, 2004
filing date -
Mar 9, 2004
priority date (Note) -
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Abstract
An uninterruptible power supply apparatus includes a first bidirectional power converter circuit having first and second ports and a second bidirectional power converter circuit having first and second ports. The apparatus further includes a DC link that couples the second port of the first bidirectional power converter circuit to the first port of the second bidirectional power converter circuit. A first load port is coupled to the second port of the second bidirectional power converter circuit and a second load port is coupled to the first port of the first bidirectional power converter circuit. The apparatus further includes a control circuit that is configured to control the first and second bidirectional power converter circuits such that each of the first and second bidirectional power converter circuits can generate and/or condition AC power at each of the first and second load ports.
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