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A Method of SVPWM and SHEPWM Applied to Three-Level NPC Inverter
Author(s): 
Pages: 34-40
Year: Issue:  12
Journal: Transactions of China Electrotechnical Society

Keyword:  Three-level NPC inverterspace vector pulse width modulationselective harmonic elimination pulse width modulationhybrid PWM me;
Abstract: A novel hybrid PWM method is proposed, which uses asynchronous SVPWM at low frequency and SHEPWM at high frequency, thus in the whole output frequency range the low order harmonic is suppressed effectively and high quality output waveforms are obtained. This paper studies the cause of jumping and gives the corresponding solution, which assures the smooth switching between SVPWM and SHEPWM, At last the proposed PWM method is simulated with PSIM software and experimentally verified through the three-level NPC inverter ASD systems,the theoretical analysis done by the verification.
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