A new seven‐level ANPC inverter structure with semiconductor device reduction

Abstract

An active neutral point clamped‐type multilevel inverter (ANPC‐MLI) with self‐voltage balancing capability is being suggested for this study. A new switched capacitor cell with eight switches is used for seven‐level generation in the proposed topology. The topology proposed has decreased the power element count with the ability to self‐balancing of capacitor voltages and boosting ability. The distinguishing characteristics of the proposed topology are emphasized and compared with other recent 7L‐SCMLI topologies. Experimental testing on a prototype hardware is conducted to validate the feasibility of the proposed topology.

A novel step‐up topology for multilevel power conversion

“…As evident from Table 4, the seven-level topologies [13][14][15] required low Ns but had a gain of 1.5 for previous works 13,14 and a gain of 3 for Sarwer et al. 15 As having a high gain in the seven-level inverter, 15 TSV increases resultant CF is high.…”

“…Proposed SC-MLI worked in an asymmetric charging state and uses only three capacitors. The topologies [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] generate different voltage levels and use single or multiple DC sources. Topologies [13][14][15] are operated with seven-level, where previous works 13,14 have the gain of 1.5.…”

“…The topologies [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] generate different voltage levels and use single or multiple DC sources. Topologies [13][14][15] are operated with seven-level, where previous works 13,14 have the gain of 1.5. The gain for Sarwer et al 15 is 3, but this topology required a high number of switches.…”

Seven‐level triple boost self‐balanced switched‐capacitor inverter

“…The CF of self‐balanced SCMLI mainly depends on the component count and TSV PU as shown in Equation (18). 23 The component count and (TSV + PIV) PU have to maintain a minimum to make the cost of the inverter low. Similarly, MBV and TCS MAX have to maintain the minimum to provide high efficiency.…”

A novel bridgeless flying capacitor multilevel rectifier

“…8,9 Considering in quite a lot industrial applications, bidirectional power flow is not required, 10,11 such as the AC adjustable speed motor drives with pumps or fans load, for such applications, the first configuration seems too complex and costly. In the latter a passive or an active filter is required in front end to mitigate input current harmonics produced by the diode rectifier, besides, it requires additional hardware installation to achieve voltage balancing control 12,13 of the DC-link split capacitors. 14 The cascaded multilevel converter based on high-frequency (HF) isolated DC/DC converter is another type of LF transformerless converter where the traditional LF transformers are removed.…”