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A generalized single-phase cascaded multilevel inverter with reduced switch count

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Abstract

The paper presents a new generalized topology-based single-phase cascaded multilevel inverter with reduced power electronic switches, thereby reducing the driver circuits. A new basic unit is proposed in this paper. In order to generate required voltages at the output, an H-bridge is added in conjunction with the basic unit as the unit provides only positive voltage levels. Owing to the merits possessed by cascaded multilevel inverter such as reduction in switch count, driver circuits, low stresses in voltage and their power quality being high, a basic unit is developed. A comparison between the existing topologies and the proposed topology is presented. The developed cascaded 9-level multilevel inverter topology is validated with both simulations and experimentation.

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  1. Department of Electrical and Electronics Engineering, M. S. Ramaiah Institute of Technology, Bengaluru, India

    Ratna Rahul Tupakula

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  1. Ratna Rahul Tupakula
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Correspondence to Ratna Rahul Tupakula.

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Appendix

Appendix

fs = 5000 Hz, ma = 0.8, IRF640N-10 units, driver circuits-9, h = 0.0040, k = 1.6783, m = 0.0181, n = 1.3444, gamma function of (k + 1)/2 = 0.892, (k/2 + 1) = 0.942, (n + 1)/2 = 0.926, (n/2 + 1) = 0.903, kgon = 0.0011, kgoff = 0.00047, R = 100 Ω, L = 10 mH, Vds = 50 V, Vtest = 40 V, Rds = 0.15 Ω.

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Tupakula, R.R. A generalized single-phase cascaded multilevel inverter with reduced switch count. Electr Eng 103, 1115–1125 (2021). https://doi.org/10.1007/s00202-020-01141-0

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