Vienna rectifier
The Vienna rectifier is a three-phase AC pulse-width modulation rectifier, invented in 1993 by Johann W. Kolar at TU Wien, a public research university in Vienna, Austria. == Features == The Vienna rectifier provides the following features: Three-phase three-level three-switch PWM rectifier with controlled output voltage Three-wire input, no connection to neutral Ohmic mains behaviour Boost system (continuous input current) Unidirectional power flow High power density Low conducted common-mode electro-magnetic interference (EMI) emissions Simple control to stabilize the neutral point potential Low complexity, low realization effort Low switching losses Reliable behaviour (guaranteeing ohmic mains behaviour) under heavily unbalanced mains voltages and in case of mains failure == Topology == The Vienna rectifier is a unidirectional three-phase three-switch three-level pulse-width modulation (PWM) rectifier.