Non-isolated AC power supply device and method for controlling the same
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United States of America Patent
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Nov 1, 2005
Grant Date -
Feb 17, 2005
app pub date -
Aug 13, 2003
filing date -
Aug 13, 2003
priority date (Note) -
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Abstract
A non-isolated power supply device and a method for controlling the same, wherein only one DC voltage bus is adopted and the neutral lines of the input voltage and output voltage are directly connected together. During the periods that the voltage polarities of the input voltage and output voltage are not the same, the power supply device is operated in a flyback mode to avoid the generation of an abnormal current. Otherwise, during the periods that the voltage polarities of the input voltage and output voltage are the same, the power supply device is operated in a boost mode to derive a superior efficiency.
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