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Modified Unipolar Carrier-Based PWM Strategy for Three-Level Neutral-Point-Clamped Voltage Source Inverters
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 Title & Authors
Modified Unipolar Carrier-Based PWM Strategy for Three-Level Neutral-Point-Clamped Voltage Source Inverters
Srirattanawichaikul, Watcharin; Premrudeepreechacharn, Suttichai; Kumsuwan, Yuttana;
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 Abstract
This paper presents a simple modified unipolar carrier-based pulsewidth modulation (CB-PWM) strategy for the three-level neutral-point-clamped (NPC) voltage source inverter (VSI). Analytical expressions for the relationship between modulation reference signals and output voltages are derived. The proposed modulation technique for the three-level NPC VSI includes the maximum and minimum of the three-phase sinusoidal reference voltages with zero-sequence voltage injection concept. The proposed modified CB-PWM strategy incorporates a novel method that requires only of one triangular carrier wave for generate the gating pulses in three-level NPC VSI. It has the advantages of being simplifying the algorithm with no need of complex two/multi-carrier pulsewidth modulation or space vector modulation (SVM) and it's also simple to implement. The possibility of the proposed CB-PWM technique has been verified though computer simulation and experimental results.
 Keywords
Three-level neutral-point-clamped voltage source inverter;Carrier-based pulsewidth modulation strategy;Multilevel converter;
 Language
English
 Cited by
1.
Harmonic Domain Modelling of Space Vector Based STATCOM, Energy and Power Engineering, 2016, 08, 04, 195  crossref(new windwow)
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