Ein neuartiger dreiphasiger Multilevel-Wechselrichter mit einfachem DC-Zwischenkreis für Induktionsm

All industrial drives require a regulated output. This can be achieved by controlling the input supply. In this context, the inverter circuit plays an important role in industrial drive applications. Industrial drives operate at high rated power, and conventional inverters are not suitable for high power requirements due to the large dV/dt (rate of voltage change) and higher switching losses. Therefore, multilevel inverters are introduced for high power and medium voltage applications. In all AC drives, MLIs are reliable in operation. This MLI topology also reduces the harmonic distortion and bearing stress of a motor with low dV/dt. In most applications, multilevel inverters are used because we can achieve a greater number of voltage levels. To increase the number of voltage levels, the circuit must have more switches. However, we need to optimize the number of switches and the switching processes. Due to high currents and loads, the performance of the inverter is limited. In this article, we propose a new circuit topology that allows the switches to be active at different voltage levels, reduces switching losses, and also increases the efficiency of the inverter.