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To solve the issue of neutral-point (NP) balancing in the three-level NP-clamed inverter, a novel carrier-based pulsewidth modulation (CPWM) strategy of double modulation waveforms is proposed in this paper. By combining the injection of zero-sequence voltage with the decomposition of modulation waveform organically, NP balancing is achieved over full range of inverter output voltages and load angles...
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