A variable speed three phase generator voltage hook up with a DC bus by VIENNA rectifier

Different converters like AC-DC, DC-DC or DC-AC is an inevitable part of the modern electronic equipments. Among them the active three-phase converters give a steady DC output voltage and also makes the input current shape sinusoidal. It also improves the power factor by maintaining the input voltage and current in phase. The major concentration of the paper is to develop an interface technique between variable speed three-phase generators and a DC bus. The interface technique is done by VIENNA rectifier topology where it convert a variable voltage and variable frequency to constant output DC voltage. This type of interface can be used in wind generation systems employing AC generators and also in the proposed electrical power systems in automobiles. The paper also derived the designing process of converter to choose semiconductor components for the desired system efficiency. Expected results are verified by the simulation. By the experiments it is found that the VIENNA rectifier is controlled as dual boost rectifier which is suitable for applications that require power factor corrections and simultaneously operate from a wide input voltage range to get a constant DC bus voltage.