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A Seven-level defined selective harmonic elimination PWM strategy

Agelidis, V.G. and Balouktsis, A.I. (2006) A Seven-level defined selective harmonic elimination PWM strategy. In: Power Electronics Specialists Conference (PESC '06) 2006, 18 - 22 June 2006, Korea pp. 1-7.

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    Selective harmonic elimination pulse-width modulation (SHE-PWM) techniques offer an optimized control approach for a given converter and are therefore suitable for the low switching frequency high-power applications. Optimization techniques can be successfully used to obtain the solutions of the equations defining the SHE-PWM waveform. In this paper, a seven-level multilevel strategy (MSHE-PWM) defined on the line-to-neutral basis and based on a ratio of a variable number of angles distributed over three levels to be able to calculate the transition points is reported. The technique provides eighteen switching transitions for every quarter period in the standard modulation index range. In the overmodulation region, this can be changed in order to increase the gain of the modulator which in turn results in a compromised bandwidth. The switching angles as a function of the modulation index are reported for the standard as well as the overmodulation range. Selected simulation results are presented to verify the effectiveness and feasibility of the proposed method.

    Publication Type: Conference Paper
    Murdoch Affiliation: School of Engineering Science
    Notes: Appears In: 37th Annual IEEE Power Electronics Specialists Conference Proceedings
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