Unity power factor isolated three-phase rectifier with neutral point based on the Scott transformer

In this work, the three-phase rectifier with a new connection is presented. Based on the Scott transformer, it makes possible a neutral point voltage and it operates with unity power factor. Using only two active switches, it is able to generate symmetrical currents in the line and output voltage with balanced neutral point, which is necessary in several applications. It is used PWM, with instantaneous average current control. Besides it has two voltage controls that regulate the output voltage and the neutral point voltage. Complete simulation results with closed loop operation are given, as well as results of an experimental verification.