Converter device for an uninterruptible power supply
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United States of America Patent
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Dec 16, 2014
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app pub date -
Apr 6, 2011
filing date -
Apr 26, 2010
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Abstract
A converter device for an uninterruptible power supply, the device having first and second main switching units connected to first and second voltage lines of a first type and each equipped with a first main switch; a main switching point connected to a voltage line of a second type and connected to the first and second main switching units; and a third main switch common to the first and second main switching units, and connected between the main switching point and a third voltage line of the first type; first, second and third capacitors connected between the main switching point and each of the first, second and third voltage lines of the first type; a first auxiliary switching unit connected by individual auxiliary switches between the first and second voltage lines of the first type, and a first auxiliary switching point; a second auxiliary switching unit connected between the first, second and third voltage lines of the first type, and a second auxiliary switching point; and a transformer having windings each having one free end and one end connected to the main switching point, with the free ends respectively connected to the first and second auxiliary switching points.
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