Five‐Level Multiple‐Pole Multilevel Vienna Rectifier

This chapter introduces a new unidirectional three‐phase five‐level rectifier topology that requires only a minimum of six identical insulated gate bipolar transistor devices. The concept of this rectifier topology with a reduced number of operating devices is derived and modified from the unidirectional multiple‐pole multilevel switch‐clamped rectifier topology. Hence, this rectifier is named multiple‐pole multilevel vienna rectifier topology. The chapter presents a new switching scheme to achieve lower losses by remaining the minimum number of switches in unidirectional 5L rectifier topologies. A conventional three‐phase vienna rectifier topology consists of three switches. Each of the switches is connected across the four adjacent diodes to enable a bidirectional current flow between the grid and the neutral‐point clamp of the two dc‐link capacitors. The five‐level rectifier topology utilizes lesser number of components as compared with the conventional unidirectional diode‐clamped rectifier.