Power supply device
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United States of America Patent
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Mar 28, 2017
Issued Date -
N/A
app pub date -
Mar 7, 2014
filing date -
Mar 29, 2013
priority date (Note) -
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Abstract
In a power supply device the bridge circuit is configured such that a plurality of series circuits of two inverse parallel connection circuits of a semiconductor switch and a diode are connected in parallel. The power supply device includes a control unit configured to control the semiconductor switch such that a voltage between AC terminals of the bridge circuit becomes a zero voltage only during a prescribed time period before and after two zero crossing points in one cycle of the input current and such that the voltage becomes a positive-negative voltage in which the output voltage is a peak current value during other time periods. Consequently, a power factor of the power receiving circuit is improved and a loss of an entire device is inhibited, and a size and a cost of the entire device may be reduced.
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