A novel SHE-PWM method for five level voltage inverters with quarter-wave symmetry

Author

Fei, Wanmin ; Wu, Bin ; Wu, Qin

Author_Institution

Sch. of Electr. & Autom. Eng., Nanjing Normal Univ., Nanjing

fYear

2009

fDate

3-6 May 2009

Firstpage

1034

Lastpage

1038

Abstract

A novel formulation of quarter-symmetry SHE-PWM problems for five-level voltage inverters is proposed. The SHE modulation scheme features a broad solution space and can eliminate a large number of low-order harmonics. An effective method for obtaining initial values of switching angles is proposed. To illustrate the effectiveness of the proposed SHE method, a five-level voltage source inverter with elimination of 11 low-order harmonics is investigated. The SHE-PWM equations that can eliminate harmonics from 5^th to 35^th with modulation index M varying from 0 to 1.15 are formulated, and solutions are presented. Simulations and experiments are carried out. It is demonstrated that the experimental results agree well with simulated ones, which proves the validity and practicability of the new method proposed.

Keywords

PWM invertors; harmonics suppression; power conversion harmonics; switching convertors; five-level voltage inverters; low-order harmonics elimination; modulation index; quarter-symmetry SHE-PWM method; switching angles; Automation; Circuit topology; Control systems; Differential equations; Phase modulation; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Switching frequency; Voltage; Five-level inverter; Pulse Width Modulation; Selective Harmonics elimination;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2009. CCECE '09. Canadian Conference on

Conference_Location

St. John´s, NL

ISSN

0840-7789

Print_ISBN

978-1-4244-3509-8

Electronic_ISBN

0840-7789

Type

conf

DOI

10.1109/CCECE.2009.5090287

Filename

5090287