Title :
A new clew for research on PWM methods of multilevel inverters: principle and applications
Author :
Wu, Hongyang ; Deng, Yan ; Liu, Ying ; He, Xiangning
Author_Institution :
Power Electron. Inst., Zhejiang Univ., Hangzhou, China
Abstract :
A novel clew for the research on carrier-based PWM methods of multilevel inverters is proposed in the paper, which is based on the concept Of combination of the control freedom degrees (CFD). As a typical application of the clew, a novel phase shift switching frequency optimum PWM (PS-SFO PWM) method is presented. Furthermore, the correlation between multilevel carrier-based PWM methods and space vector PWM (SVPWM) methods is established by theoretical analysis, by which the research on multilevel PWM methods can be included in the clew of the combination of CFD. From the clew, a simplified algorithm of SKPWM method for five-level cascade multilevel inverters is presented, which is equivalent to PS-SFO-PWM method. The correctness and the guiding significance of the proposed research clew for the research on multilevel PWM techniques is verified by the corresponding simulation results
Keywords :
DC-AC power convertors; PWM invertors; phase shifters; switching circuits; carrier-based PWM methods; control freedom degrees; five-level cascade multilevel inverters; multilevel inverters; phase shift switching frequency optimum PWM method; simulation results; Computational fluid dynamics; Helium; Optimization methods; Power electronics; Pulse width modulation inverters; Space vector pulse width modulation; Switching frequency; Topology; Voltage;
Conference_Titel :
Power Conversion Conference, 2002. PCC-Osaka 2002. Proceedings of the
Conference_Location :
Osaka
Print_ISBN :
0-7803-7156-9
DOI :
10.1109/PCC.2002.998152
