FIVE-PHASE ADVANCED HYBRID PWM FOR DUAL REFERENCE FREQUENCIES
| Autor: | Chih-Lun Wei, 魏志綸 |
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| Rok vydání: | 2018 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 106 A new advanced hybrid pulse-width modulation for five-phase voltage source inverters is proposed in this thesis, and then employed for two different motors with different rotating speed. Based on the analysis of current ripple, which is proportional to line current harmonics, the switching sequence used in the conventional space vector PWM (CSVPWM) is not the optimal way. In this thesis, all possible switching sequences for five-phase inverters are analyzed, and further analysis switching sequences to produce new switching sequences which can reduce current ripple. As compared to CSVPWM, the proposed advanced hybrid PWM can produce equivalent phase voltage to reference in average means. By using different switching sequences, the proposed method can reduce current THD under the same average switching frequency as compared with CSVPWM. The simulations and experiments can confirm the theoretical derivations of the proposed modulator. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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