Cascaded Multilevel Inverter With Regeneration Capability and Reduced Number of Switches

Abstract

Abstract-Multilevel converters are a very interesting alternative for medium and high power drives. One of the more flexible topologies of this type is the cascaded multicell converter. This paper proposes the use of a single-phase reduced cell suitable for cascaded multilevel converters. This cell uses a reduced singlephase active rectifier at the input and an H-bridge inverter at the output side. This topology presents a very good performance, effectively controlling the waveform of the input current and of the output voltage and allowing operation in the motoring and regenerative mode. The results presented in this paper confirm that this medium voltage inverter effectively eliminates low frequency input current harmonics at the primary side of the transformer and operates without problems in regenerative mode.

A Modular Bi-Directional Power Electronic Transformer

“…However, the bulky and expensive LF transformer still exists. Similar topologies were presented in [48], where PWM rectifiers with one or two arms are adopted. A direct back to back CHB converter has also been presented.…”

Energy conversion unit with optimized waveform generation

“…In this context, a multilevel converter is an interesting alternative for power conversion, since it allows efficient power supply, suitable for high voltage and high power applications [14,[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]. Multilevel power converters have been around for more than 40 years [20,[35][36][37][38][39][40].…”

“…Multilevel converters have been improved since their first generations to support the desirable characteristics such as reduced waveform distortion and low blocking voltage by switching devices [20,22,24,[47][48][49]. Within the literature, numerous papers can be found dealing with different sample topologies and designs of multilevel converters to improve their performance [10,[50][51][52][53].…”

Reduction of Components in New Family of Diode Clamp Multilevel Inverter Ordeal to Induction Motor

“…However, it requires a large number of semiconductor switching devices and gate driver circuits, which reducing the inverter reliability, complexity, cost and also the system efficiency. For low power application the utilization of a large number of switching devices is inadequate, therefore, researchers continue to focus on reducing the component count of multilevel inverter [15][16][17][18][19][20][21][22][23][24][25].…”