Parallel redundant power system and the control method for the same
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United States of America Patent
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Sep 16, 2008
Grant Date -
Dec 28, 2006
app pub date -
Aug 21, 2006
filing date -
Oct 2, 2003
priority date (Note) -
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Abstract
A power redundant power system and a method for controlling the power system are presented, wherein the power system is composed of at least one inverter for supplying AC power to a load through a bus, a phase lock system to synchronize all output voltages of the inverters and a current sharing circuit to properly distribute the load current among all inverters. Each inverter is controlled by an unbalanced power to limit the increase of its cross current. Moreover, the information related to DC bus voltage is further applied to control the inverters, whereby the cross current is mitigated and entire power system is operated steadily.
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