Influence of Dead-Time on the Input Current Ripple of Three-Phase Voltage Source Inverter

Juris Arrozy (), Darian V. Retianza, Jorge L. Duarte, Esin Ilhan Caarls and Henk Huisman
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Juris Arrozy: Electromechanics & Power Electronics Group, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
Darian V. Retianza: Electromechanics & Power Electronics Group, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
Jorge L. Duarte: Electromechanics & Power Electronics Group, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
Esin Ilhan Caarls: Electromechanics & Power Electronics Group, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
Henk Huisman: Electromechanics & Power Electronics Group, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands

Energies, 2023, vol. 16, issue 2, 1-20

Abstract: The DC-link capacitor in power electronic systems is one of the most vulnerable components in terms of reliability. Since a reliable design of the DC-link capacitor depends on an accurate estimation of its current ripple, this paper proposes analytical equations to model the influence of dead-time on the input current ripple of a three-phase voltage source inverter. The effect of dead-time is modeled as a delay in the rising edges of the input current waveform. The proposed analytical equations are derived and then verified by simulations and experiments. The proposed equations generally provide better accuracy in predicting the input current ripple value compared to the benchmark equations. From the simulation and experimental results, the proposed equations are optimized for dead-time values more than 0.7 μ s and modulation indices less than or equal to 0.7. Limitations of the proposed equations are also discussed. For small phase displacements and high modulation indices (0.8 to 1), the accuracy decreases because of the influence of AC output current ripple. For small modulation indices (less than 0.2) and a high value of dead-time (2 μ s), the accuracy also decreases due to distortion in the phase current waveforms.

Keywords: three-phase voltage source inveter; DC-link capacitor; time-domain approach; input current ripple; dead-time; phase displacement (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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