UNINTERRUPTIBLE POWER SUPPLY WITH RECTIFIER FAST WALK IN
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United States of America Patent
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Issued Date -
Aug 13, 2009
app pub date -
Jan 7, 2009
filing date -
Feb 13, 2008
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
In an uninterruptible power supply (“UPS”) having a flywheel storage module, switched rectifying devices of an AC/DC converter of the UPS are walked in after a utility power outage by initially firing the switched rectifying devices at a phase angle where the voltage output by the AC/DC converter to a direct current bus matches a depleted DC bus voltage. In an aspect, the initial phase angle is determined by the equation:where θ is the initial phase angle, VDC is the depleted DC bus voltage and VRMS is the RMS voltage of the utility power.
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