page_title: Vienna rectifier
section_title: Applications
hierarchical_section_title: Vienna rectifier / Applications
caption_attribution_description: English: Top and bottom view of an air-cooled 10kW-Vienna rectifier (400kHz PWM) Deutsch: Modul eines Vienna-Gleichrichters für 400 V mit einer Leistung von 10 kW
context_page_description: The Vienna Rectifier is a pulse-width modulation rectifier, invented in 1993 by Johann W. Kolar.
context_section_description: The Vienna Rectifier is useful wherever six-switch converters are used for achieving sinusoidal mains current and controlled output voltage, when no energy feedback from the load into the mains is available.  In practice, use of the Vienna Rectifier is advantageous when space is at a sufficient premium to justify the additional hardware cost.  These include:
  Telecommunications power supplies.
  Uninterruptable power supplies.
  Input stages of AC-drive converter systems.
  Figure 2 shows the top and bottom views of an air-cooled 10 kW-Vienna Rectifier (400 kHz PWM), with sinusoidal input current s and controlled output voltage.  Dimensions are 250mm x 120mm x 40mm, resulting in a power density of 8.5 kW/dm³.  The total weight of the converter is 2.1 kg
caption: Fig. 2: Top and bottom views of an air-cooled 10kW-Vienna Rectifier (400kHz PWM).
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