Switching systems and methods for use in uninterruptible power supplies
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United States of America Patent
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May 12, 2015
Issued Date -
N/A
app pub date -
Jan 17, 2012
filing date -
Jan 23, 2011
priority date (Note) -
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Abstract
The present invention may be embodied as an uninterruptible power supply comprising an input section, an output section, an inverter section, and a transformer. The transformer is operatively connected to the input section, the output section, and the inverter section. The uninterruptible power supply operates in a line mode and in a standby mode. In the standby mode, the output section generates an output power signal from a standby signal generated by the inverter section based on the alternative power source and at least one inverter control signal. When the uninterruptible power supply operates in the standby mode, the at least one inverter control signal is pulse-width modulated during at least a first portion of a cycle of the output power signal and not pulse-width modulated during at least a second portion of the cycle of the output power signal.
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