A New Hybrid Multilevel Nested Neutral Point Clamped (NNPC) Converter

Kordic, Milan; Narimani, Mehdi; Alimardani, Mehdi

doi:10.1109/ccece.2018.8447693

Cited by 4 publications

(2 citation statements)

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“…Therefore, the proposed 4LT 2 C is more advantageous in terms of fewer conduction losses. Figure 10 presents the topology for the nested multilevel configuration with four-level inverter in [41], four-level inverter proposed in [42] and a typical diode clamped multilevel inverter. Table 7 compares the proposed 4LT 2 C with the recent four-level inverter from [40,41], the four-level inverter proposed in [2], and the other existing topology shown in Figure 9, in terms of the number of switches, diodes, capacitors and dc sources.…”

Section: The Currentmentioning

confidence: 99%

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A Novel Multilevel DC-Link Three-Phase T-Type Inverter

et al. 2020

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This research proposes a four-level T-type inverter that is suitable for low-power applications. The presented topology outranks other types of inverters in terms of a smaller number of semiconductor devices, absence of passive components such as clamping diodes and flying capacitors, low switching and conduction losses, and high efficiency. The proposed topology is free from voltage deviation and unbalanced voltage occurrences that are present in other multilevel converters having clamping diodes or flying capacitors. The proposed inverter can extend to N levels using unequal dc-link voltage sources for medium-voltage application. The inverter employs the simple fundamental frequency staircase modulation technique. Moreover, this paper presents a current commutation strategy to prevent the occurrences of short circuit and minimizing the number of required switching devices and switching transitions, resulting in improving the efficiency of the inverter. This paper also analyses the theoretical converter losses showing lower switching and conduction losses when compared to existing four-level inverters. The experimental validation of the proposed inverter shows its operating feasibility and a low output voltage THD.

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Section: The Currentmentioning

confidence: 99%

“…Topologies proposed in the technical literature. (a) Nested multilevel configuration with four levels[42]. (b) Four-level inverter proposed by[39].…”

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confidence: 99%