Cascaded Common Nodal Point Multi-level Inverter Topology

Odeh, Charles I.; Agu, Vincent N.

doi:10.1080/15325008.2016.1266061

Cited by 5 publications

(2 citation statements)

References 37 publications

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“…These conditions will show the behavior/performance of the five-phase NPC inverter under the augmented zero-sequence voltage injection in SPWM. The proportional and integral constant coefficients, K 1 and K 2 , are obtained from earlier work on neutral-point current balancing [25,26]. Dynamic operations with and without the capacitor voltage balancing scheme will be demonstrated, as well as variation in the output load power factor.…”

Section: Simulation Resultsmentioning

confidence: 99%

Modified SPWM Technique with Zero-Sequence Voltage Injection for a Five-Phase, Three-Level NPC Inverter

et al. 2021

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This article presents a modified sinusoidal pulse-width modulation (SPWM) scheme for a five-phase, three-level neutral-point-clamped inverter. The modulation scheme deploys a modified min–max function to inject the zero-sequence components into the reference modulating signals; hence enabling the effective utilization of the DC-link voltage. Balanced split-input DC-link voltages were achieved through further incorporation of adjustable voltage-dependent variables into the reference signals. The dynamic performance of the control approach is demonstrated through simulations and experiments on a laboratory inverter prototype; the results are well presented.

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Section: Simulation Resultsmentioning

confidence: 99%

Modified SPWM Technique with Zero-Sequence Voltage Injection for a Five-Phase, Three-Level NPC Inverter

et al. 2021

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“…Single-carrier sinusoidal PWM switching scheme for a module in the proposed cascade multilevel inverter configuration. figure 3 is compared with the classical symmetrical CHB and recent similar symmetrical MLI topologies proposed in [28], [31][32][33] and [38][39][40][41]. The comparison is shown in Table 2 based on the aforementioned criteria, for a given number, x, of the input dc voltage source, VS. Table 2 shows that for the same number of dc input voltage, the proposed module inverter increases both the number of level and magnitude of output voltage by 50% when compared to the classical CHB inverter module; at the expense of additional two active switches.…”

Section: = >mentioning

confidence: 99%

Cascaded single-phase, PWM multilevel inverter with boosted output voltage

Nnadi¹,

Oti²,

Odeh³

2020

Nig. J. Tech.

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Splitting of a dc voltage source with two capacitors has been the approach in generating 5-level output voltage with single- and three-phase full-bridge circuits and added bidirectional switch. Associated with this configuration is the problem of voltage imbalance between the splitting capacitors. In addition, the inverter output voltage magnitude is obviously limited to the value of the split input voltage source. Presented in this paper is a unit topology for single-phase 5-level multilevel inverter, MLI. It simply consists of a full-bridge circuit, a capacitor, charge-discharge unit and a dc source. The charge-discharge unit with the capacitor is the interface between the full-bridge and the dc source. The proposed unit cell can generate a 5-level output voltage waveform whose peak value is twice the input voltage value. For higher output voltage level, a cascaded structure of the developed unit cell is presented. Comparing the proposed inverter with CHB inverter and some recent developed MLI topologies, it is found that the proposed inverter configuration generates higher output voltage value, at reduced component-count, than other topologies, for a specified number of dc input voltages. For two cascaded modules, simulation and experimental verifications are carried out on the proposed inverter topology for an R-L load. Keywords: Cascaded multilevel, Inverter, total harmonic distortion, topologies, waveform

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