Analysis and control of a five-phase AC/DC/AC converter with active rectifier

The paper presents AC/DC/AC power electronic converter system with five-phase two-level active rectifier and five-phase two-level inverter with a dc link. Five-phase active rectifier system is presented for the first time in this paper. This is an extension of a three-phase active rectifier with two additional legs. This topology may find its application in five-phase variable speed generator such as wind electric generator system. The front end converter has two control loops, the dc link voltage control and the source side current control with unity power factor operation. However, this paper discusses the multi-phase active rectifier applications in multi-phase motor drive system. Simple hysteresis controllers are used to control the input from the source and output to the load currents (five-phase induction motor stator current). The validity of the control is validated using analytical and simulation approaches. A comparison between three-phase and five-phase active rectifier is presented as well.