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| A Method of SVPWM and SHEPWM Applied to Three-Level NPC Inverter |
| Li Shijun1,2,Luo Longfu1,She Shuangxiang3,Liu xingping2,Shi Xiaorong2 |
1. College of Electrical and Information Engineering, Hunan University Changsha 410082 China;
2. College of Electrical & Information Engineering;Hunan Institute of Engineering Xiangtan 411101 China;
3. Powerchina Zhongnan Engineering Co.Ltd., Changsha 410014 China |
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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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Received: 27 March 2014
Published: 14 September 2015
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2015, Vol. 30 
