<p>The <b>Vienna Rectifier</b> is a <a title="Pulse-width modulation" href="https://en.wikipedia.org/wiki/Pulse-width_modulation"><u><font color="#0066cc">pulse-width modulation</font></u></a> rectifier, invented in 1993 by Johann W. Kolar. It provides:</p><ul><li><a title="Three-phase" href="https://en.wikipedia.org/wiki/Three-phase"><u><font color="#0066cc">Three-phase</font></u></a> three-level three-switch PWM <a title="Rectifier" href="https://en.wikipedia.org/wiki/Rectifier"><u><font color="#0066cc">rectifier</font></u></a> with controlled output voltage.</li><li>Three-wire input, no connection to neutral.</li><li>Ohmic mains behaviour</li><li>Boost system (continuous input current).</li><li>Unidirectional power flow.</li><li>High power density.</li><li>Low conducted common-mode EMI emissions.</li><li>Simple control to stabilize the neutral point potential.</li><li>Low complexity, low realization effort </li><li>Low switching losses.</li><li>Reliable behaviour (guaranteeing ohmic mains behaviour) under heavily unbalanced mains voltages and in case of mains failure<br></li></ul><p><br></p><p style="text-align: center;"><img src="https://t1.daumcdn.net/cfile/cafe/272E354C5738C81611" class="txc-image" width="500" style="clear: none; float: none;" border="0" vspace="1" hspace="1" actualwidth="500" exif="{}" data-filename="Vienna_rectifier_schematic.jpg" id="A_272E354C5738C81611F60C"/></p><p style="text-align: center;">Fig. 1: Schematic of a Vienna Rectifier.</p><p style="text-align: center;"><br></p>
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