IEEE Transactions on Industry Applications · 2007 · 162 citations · 19 references
EngineeringElectrical EngineeringHybrid Vehicle SystemsMicroelectronicsPower ElectronicsConverter TopologiesDc-ac InvertersMultilevel ConvertersPulse-width ModulationRenewable Energy Power ConversionVoltage RegulationInvertersModulation IndexMultilevel InvertersNeutral PointNeutral-point-clamped ConvertersOvermodulationSpace Vector ModulationSpace Vector Pulse-width Modulation
Three-level neutral point clamped (NPC) inverter is a widely used topology of multilevel inverters. However, the neutral point fluctuates for certain switching states. At low modulation index, the fluctuations can be compensated using redundant switching states. But, at higher modulation index and in overmodulation region, the neutral point fluctuation deteriorates the performance of the inverter. This paper proposes a simple space vector pulsewidth modulation scheme for operating a three-level NPC inverter at higher modulation indexes, including overmodulation region, with neutral point balancing. Experimental results are provided
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