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This article presents an inverting Nx multilevel boost converter (Inverting Nx MBC) with continuous input current for DC link applications where several negative voltage levels are required with self-balancing such as photovoltaic (PV) multilevel inverter systems. The voltage obtains from the photovoltaic array need to boost before a feed to inverter for practical utilization or grid connect. In this...
This paper work exploits a new dual open-winding three-phase multilevel inverter configuration suitable for high power medium-voltage applications. Modular structure comprised of standard three-phase voltage source inverter (VSI) along with one additional bi-directional semiconductor device (MOSFET/IGBT) per phase and two capacitors with neutral point. Hence, introduces the additional voltage levels...
The main objective of this paper is to analyze two different types of nine level inverters. This paper depends on the multilevel converters with multiple numbers of DC sources and presents cascaded H-bridge nine level inverter and multi string nine level inverter topologies with four input DC sources. The purpose of this paper is to show the differences between these two converters in terms of modulation...
This paper proposes a carrier-based pulse-width modulation (CBPWM) scheme for N independent three-phase loads using the general (3N+3)-switch converter. The proposed topology is derived from the nine-switch converter which is gaining considerable interest from researchers because it costs less due to its reduced number of active switches. The structure and limitations of the converter are elaborated;...
The main objective of this paper is to study a seven level multi string converter topology for distributed energy resources based DC-AC conversion system. This paper proposes the Karnaugh mapping technique (which was rarely used in power electronic converters) for modeling the multi string seven level converter. The proposed method can also be extended to ‘n’ level converter. This paper also proposes...
The nine-switch converter (NSC) has been used in power quality conditioners and AC motor drives. However, it has not attracted much attention because of its amplitude, frequency and phase-shift limitations primarily due to the constraint on the modulation index of the converter. To satisfy the modulation constraint and correctly synthesize the desired voltages, ‘appropriate’ DC offsets must be added...
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