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A multilevel inverter approach providing DC-link balancing, ride-through enhancement, and common-mode voltage elimination

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3 Author(s)
von Jouanne, A. ; Dept. of Electr. & Comput. Eng., Oregon State Univ., Corvallis, OR, USA ; Shaoan Dai ; Haoran Zhang

This paper presents a simple control method for balancing the DC-link voltage of three-level neutral-point-clamped inverters, while providing enhanced ride-through and common-mode voltage (CMV) elimination. The method uses DC-DC power converter technology on the DC link for balancing and ride-through enhancement, and a modified pulsewidth-modulation switching algorithm for CMV elimination. Simulation and experimental results are supplied to confirm the validity of the proposed method, which includes full digital signal processor control.

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Industrial Electronics, IEEE Transactions on  (Volume:49 ,  Issue: 4 )