UNINTERRUPTIBLE POWER SYSTEMS USING CURRENT SOURCE RECTIFIERS AND METHODS OF OPERATING THE SAME
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United States of America Patent
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Jun 18, 2015
app pub date -
Dec 18, 2013
filing date -
Dec 18, 2013
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Abstract
An apparatus includes a current source rectifier circuit having an input configured to be coupled to an AC power source and an output configured to be coupled to a load, a coupling circuit configured to couple a DC power source to the current source rectifier, and a control circuit configured to selectively operate the current source rectifier circuit and the coupling circuit to generate a DC output from the AC power source and the DC power source. In some embodiments, the control circuit may be configured to operate the coupling circuit to provide a DC/DC converter circuit that uses an energy storage inductor of the current source rectifier circuit. The apparatus may further include a freewheeling diode shared by the current source rectifier circuit and the DC/DC converter circuit. Such apparatus may be used, for example, in DC UPS applications.
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