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

Volume

3

fYear

2002

fDate

2002

Firstpage

1251

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Conversion Conference, 2002. PCC-Osaka 2002. Proceedings of the

Conference_Location

Osaka

Print_ISBN

0-7803-7156-9

Type

conf

DOI

10.1109/PCC.2002.998152

Filename

998152