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2010•Electric Machines and Control ApplicationRequires access

Neutral Point Balancing of Inverter with Space Vector Pulse Width Modulation Optimization Algorithm

Guo Jiang-yan

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Abstract

The causes and influence of imbalanced neutral point potential in the NPC three-level inverter were analyzed.Based on the optimization algorithm of SVPWM,a software strategy by adjusting the work times of active and negative small vectors was proposed.The methods were simulated with MATLAB/Simulink,and the DSP TMS3202812 was used to generate SVPWM drive signals for the NPC three-level inverter in the lab.The simulation and the waveforms of the experiments gave a conclusion that the strategy of SVPWM for neutral point potential balancing was correct and effective.

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What this paper is about

The causes and influence of imbalanced neutral point potential in the NPC three-level inverter were analyzed.Based on the optimization algorithm of SVPWM,a software strategy by adjusting the work times of active and negative small vectors was proposed.The methods were simulated with MATLAB/Simulink,and the DSP TMS3202812 was used to generate SVPWM drive signals for the NPC three-level inverter in the lab.The simulation and the waveforms of the experiments gave a conclusion that the strategy of SVPWM for neutral point potential balancing was correct and effective.

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Available abstract

The causes and influence of imbalanced neutral point potential in the NPC three-level inverter were analyzed.Based on the optimization algorithm of SVPWM,a software strategy by adjusting the work times of active and negative small vectors was proposed.The methods were simulated with MATLAB/Simulink,and the DSP TMS3202812 was used to generate SVPWM drive signals for the NPC three-level inverter in the lab.The simulation and the waveforms of the experiments gave a conclusion that the strategy of SVPWM for neutral point potential balancing was correct and effective.

Key concepts: Inverter, Space vector, MATLAB, Pulse-width modulation, Waveform, Point (geometry), Control theory (sociology), Modulation (music)

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